Contents

Introduction· 1

Prerequisites· 1

Example: Configuring access-layer M-LAG·· 1

Network configuration· 1

Analysis· 2

Applicable hardware and software versions· 3

Restrictions and guidelines· 5

Procedures· 5

Configuring Device A· 5

Configuring Device B· 7

Configuring Device C· 9

Configuring Device D·· 10

Configuring Device E· 12

Configuring Device F· 13

Verifying the configuration· 13

Configuration files· 16

Example: Configuring distribution-layer M-LAG·· 22

Network configuration· 22

Analysis· 23

Applicable hardware and software versions· 24

Restrictions and guidelines· 26

Procedures· 26

Configuring Device A· 26

Configuring Device B· 29

Configuring Device C· 31

Configuring Device D·· 32

Configuring Device E· 33

Verifying the configuration· 33

Configuration files· 37

Example: Configuring IPv4 and IPv6 dual-active VLAN gateways on an M-LAG network  42

Network configuration· 42

Analysis· 44

Applicable hardware and software versions· 45

Restrictions and guidelines· 47

Procedures· 47

Configuring Device A· 47

Configuring Device B· 50

Configuring Device C· 52

Configuring Device D·· 54

Verifying the configuration· 54

Configuration files· 57

 

Introduction

The following information provides M-LAG configuration examples.

M-LAG is a cross-device link aggregation technology. It aggregates two physical devices on the aggregation layer into one device to provide device-level redundancy protection and load sharing.

Prerequisites

The configuration examples were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

The following information is provided based on the assumption that you have basic knowledge of M-LAG.

Example: Configuring access-layer M-LAG

Network configuration

As shown in Figure 1, Device A and Device B are access devices, while Device C and Device D act as gateways. Use the M-LAG technology to implement redundancy protection and traffic load sharing for access devices. The specific requirements are as follows:

·     Deploy M-LAG on Device A and Device B to achieve redundancy backup and load sharing for access devices.

·     Exclude the interface used for M-LAG keepalive detection from the shutdown action by M-LAG MAD on Device A and Device B to detect faults on Device A and Device B.

·     Deploy VRRP on Device C and Device D. When the gateways are operating normally, users in area A use gateway Device C for data forwarding while the users in area B use gateway Device D for data forwarding to achieving traffic load sharing.

·     When Device C or its uplink interface fails, Device D can quickly take over the task of forwarding host traffic in area A. After Device C recovers from the failure, it resumes its role as the gateway for VRRP group 1.

·     When Device D or its uplink interface fails, Device C can quickly take over the task of forwarding host traffic in area B. After Device D recovers from the failure, it resumes its role as the gateway for VRRP group 2.

·     Set up an OSPF network on Device C, Device D, and Device E. Use OSPF on Device C and Device D to advertise routes for the subnets where hosts in areas A and B are located. This configuration enables Layer 3 communication between hosts in areas A and B and the external network.

Figure 1 Network diagram

 

 

Analysis

·     Assign IP addresses to the interfaces used for M-LAG keepalive detection excluded from the shutdown action by M-LAG MAD on Device A and Device B. Make sure the interfaces can communicate at Layer 3.

·     To make Device C and Device D become the master devices of VRRP groups 1 and 2, respectively, configure a higher priority for Device C in VRRP group 1 and a higher priority for Device D in VRRP group 2.

Applicable hardware and software versions

The following matrix shows the hardware and software versions to which this configuration example is applicable:

 

 

Restrictions and guidelines

When configuring M-LAG, follow these restrictions and guidelines:

·     Make sure all M-LAG member devices have the same system MAC address and priority but different system numbers.

·     Only one peer link can be configured on an M-LAG device.

·     As a best practice, exclude the keepalive interface from the shutdown action by M-LAG MAD to prevent it from being set to the MAD DOWN state during the M-LAG setup process, which could lead to detection errors.

When configuring VRRP, follow these restrictions and guidelines:

·     The virtual IP address of a VRRP group cannot be 0.0.0.0, 255.255.255.255, loopback address, non-class-A/B/C address, or other illegal IP addresses such as 0.0.0.1.

·     As a best practice, configure the virtual IP address of a VRRP group and the IP addresses of the group member devices' downlink interfaces to be in the same subnet. If you cannot do that, hosts in the LAN might fail to access the external network.

For the S5570S-EI, S5500V3-SI, S3600V3-EI, and S3600V3-SI switch series, before switching a Layer 2 Ethernet interface to a Layer 3 Ethernet interface or creating a Layer 3 aggregate interface, use the reserve-vlan-interface command to reserve local VLAN interface resources. For more information about the reserve-vlan-interface command, see the VLAN configuration and VLAN commands for your product.

Procedures

Configuring Device A

# Configure the M-LAG system parameters.

<DeviceA> system-view

[DeviceA] m-lag system-mac 1-1-1

Changing the system MAC might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

[DeviceA] m-lag system-number 1

Changing the system number might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

[DeviceA] m-lag system-priority 123

Changing the system priority might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

# Configure the destination and source IP addresses of keepalive packets.

[DeviceA] m-lag keepalive ip destination 1.1.1.2 source 1.1.1.1

# Set the link mode of GigabitEthernet 1/0/5 to Layer 3, and assign the interface an IP address. The IP address will be used as the source IP address of keepalive packets.

[DeviceA] interface gigabitethernet 1/0/5

[DeviceA-GigabitEthernet1/0/5] port link-mode route

[DeviceA-GigabitEthernet1/0/5] ip address 1.1.1.1 24

[DeviceA-GigabitEthernet1/0/5] quit

# Exclude the interface used for M-LAG keepalive detection from the shutdown action by MAD.

[DeviceA] m-lag mad exclude interface gigabitethernet 1/0/5

# Create VLAN 10 and VLAN 20.

[DeviceA] vlan 10

[DeviceA-vlan10] quit

[DeviceA] vlan 20

[DeviceA-vlan20] quit

# Create dynamic Layer 2 aggregate interface Bridge-aggregation 1.

[DeviceA] interface bridge-aggregation 1

[DeviceA-Bridge-Aggregation1] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation1] quit

# Assign GigabitEthernet 1/0/6 and GigabitEthernet 1/0/7 to aggregation group 1.

[DeviceA] interface gigabitethernet 1/0/6

[DeviceA-GigabitEthernet1/0/6] port link-aggregation group 1

[DeviceA-GigabitEthernet1/0/6] quit

[DeviceA] interface gigabitethernet 1/0/7

[DeviceA-GigabitEthernet1/0/7] port link-aggregation group 1

[DeviceA-GigabitEthernet1/0/7] quit

# Set the link type of Bridge-Aggregation 1 to trunk, and assign it to VLAN 10 and VLAN 20.

[DeviceA] interface bridge-aggregation 1

[DeviceA-Bridge-Aggregation1] port link-type trunk

Configuring GigabitEthernet1/0/6 done.

Configuring GigabitEthernet1/0/7 done.

[DeviceA-Bridge-Aggregation1] port trunk permit vlan 10 20

Configuring GigabitEthernet1/0/6 done.

Configuring GigabitEthernet1/0/7 done.

[DeviceA-Bridge-Aggregation1] quit

# Create dynamic Layer 2 aggregate interface Bridge-aggregation 3.

[DeviceA] interface bridge-aggregation 3

[DeviceA-Bridge-Aggregation3] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation3] quit

# Assign GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 to aggregation group 3.

[DeviceA] interface gigabitethernet 1/0/3

[DeviceA-GigabitEthernet1/0/3] port link-aggregation group 3

[DeviceA-GigabitEthernet1/0/3] quit

[DeviceA] interface gigabitethernet 1/0/4

[DeviceA-GigabitEthernet1/0/4] port link-aggregation group 3

[DeviceA-GigabitEthernet1/0/4] quit

# Configure Layer 2 aggregate interface Bridge-Aggregation 3 as the peer link interface.

[DeviceA] interface bridge-aggregation 3

[DeviceA-Bridge-Aggregation3] port m-lag peer-link 1

[DeviceA-Bridge-Aggregation3] quit

# Create dynamic Layer 2 dynamic aggregate interface Bridge-Aggregation 4, and configure it as M-LAG interface 4.

[DeviceA] interface bridge-aggregation 4

[DeviceA-Bridge-Aggregation4] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation4] port m-lag group 4

[DeviceA-Bridge-Aggregation4] quit

# Assign GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to aggregation group 4.

[DeviceA] interface gigabitethernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] port link-aggregation group 4

[DeviceA-GigabitEthernet1/0/1] quit

[DeviceA] interface gigabitethernet 1/0/2

[DeviceA-GigabitEthernet1/0/2] port link-aggregation group 4

[DeviceA-GigabitEthernet1/0/2] quit

# Set the link type of Bridge-Aggregation 4 to trunk, and assign it to VLAN 10 and VLAN 20.

[DeviceA] interface bridge-aggregation 4

[DeviceA-Bridge-Aggregation4] port link-type trunk

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceA-Bridge-Aggregation4] port trunk permit vlan 10 20

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceA-Bridge-Aggregation4] quit

Configuring Device B

# Configure the M-LAG system parameters.

<DeviceB> system-view

[DeviceB] m-lag system-mac 1-1-1

Changing the system MAC might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

[DeviceB] m-lag system-number 2

Changing the system number might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

[DeviceB] m-lag system-priority 123

Changing the system priority might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

# Configure the destination and source IP addresses of keepalive packets.

[DeviceB] m-lag keepalive ip destination 1.1.1.1 source 1.1.1.2

# Set the link mode of GigabitEthernet 1/0/5 to Layer 3, and assign the interface an IP address. The IP address will be used as the source IP address of keepalive packets.

[DeviceB] interface gigabitethernet 1/0/5

[DeviceB-GigabitEthernet1/0/5] port link-mode route

[DeviceB-GigabitEthernet1/0/5] ip address 1.1.1.2 24

[DeviceB-GigabitEthernet1/0/5] quit

# Exclude the interface used for M-LAG keepalive detection from the shutdown action by MAD.

[DeviceB] m-lag mad exclude interface gigabitethernet 1/0/5

# Create VLAN 10 and VLAN 20.

[DeviceB] vlan 10

[DeviceB-vlan10] quit

[DeviceB] vlan 20

[DeviceB-vlan20] quit

# Create dynamic Layer 2 aggregate interface Bridge-aggregation 2.

[DeviceB] interface bridge-aggregation 2

[DeviceB-Bridge-Aggregation2] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation2] quit

# Assign GigabitEthernet 1/0/6 and GigabitEthernet 1/0/7 to aggregation group 2.

[DeviceB] interface gigabitethernet 1/0/6

[DeviceB-GigabitEthernet1/0/6] port link-aggregation group 2

[DeviceB-GigabitEthernet1/0/6] quit

[DeviceB] interface gigabitethernet 1/0/7

[DeviceB-GigabitEthernet1/0/7] port link-aggregation group 2

[DeviceB-GigabitEthernet1/0/7] quit

# Set the link type of Bridge-Aggregation 2 to trunk, and assign it to VLAN 10 and VLAN 20.

[DeviceB] interface bridge-aggregation 2

[DeviceB-Bridge-Aggregation2] port link-type trunk

Configuring GigabitEthernet1/0/6 done.

Configuring GigabitEthernet1/0/7 done.

[DeviceB-Bridge-Aggregation2] port trunk permit vlan 10 20

Configuring GigabitEthernet1/0/6 done.

Configuring GigabitEthernet1/0/7 done.

[DeviceB-Bridge-Aggregation2] quit

# Create dynamic Layer 2 aggregate interface Bridge-aggregation 3.

[DeviceB] interface bridge-aggregation 3

[DeviceB-Bridge-Aggregation3] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation3] quit

# Assign GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 to aggregation group 3.

[DeviceB] interface gigabitethernet 1/0/3

[DeviceB-GigabitEthernet1/0/3] port link-aggregation group 3

[DeviceB-GigabitEthernet1/0/3] quit

[DeviceB] interface gigabitethernet 1/0/4

[DeviceB-GigabitEthernet1/0/4] port link-aggregation group 3

[DeviceB-GigabitEthernet1/0/4] quit

# Configure Layer 2 aggregate interface Bridge-Aggregation 3 as the peer link interface.

[DeviceB] interface bridge-aggregation 3

[DeviceB-Bridge-Aggregation3] port m-lag peer-link 1

[DeviceB-Bridge-Aggregation3] quit

# Create dynamic Layer 2 dynamic aggregate interface Bridge-Aggregation 4, and configure it as M-LAG interface 4.

[DeviceB] interface bridge-aggregation 4

[DeviceB-Bridge-Aggregation4] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation4] port m-lag group 4

[DeviceB-Bridge-Aggregation4] quit

# Assign GigabitEthernet1/0/1 and GigabitEthernet1/0/2 to aggregation group 4.

[DeviceB] interface gigabitethernet 1/0/1

[DeviceB-GigabitEthernet1/0/1] port link-aggregation group 4

[DeviceB-GigabitEthernet1/0/1] quit

[DeviceB] interface gigabitethernet 1/0/2

[DeviceB-GigabitEthernet1/0/2] port link-aggregation group 4

[DeviceB-GigabitEthernet1/0/2] quit

# Set the link type of Bridge-Aggregation 4 to trunk, and assign it to VLAN 10 and VLAN 20.

[DeviceB] interface bridge-aggregation 4

[DeviceB-Bridge-Aggregation4] port link-type trunk

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceB-Bridge-Aggregation4] port trunk permit vlan 10 20

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceB-Bridge-Aggregation4] quit

Configuring Device C

# Create VLANs 10, 20, and 100.

<DeviceC> system-view

[DeviceC] vlan 10

[DeviceC-vlan10] quit

[DeviceC] vlan 20

[DeviceC-vlan20] quit

[DeviceC] vlan 100

# Assign GigabitEthernet 1/0/3 to VLAN 100.

[DeviceC] vlan 100

[DeviceC-vlan100] port gigabitethernet 1/0/3

[DeviceC-vlan100] quit

# Create Layer 2 aggregate interface Bridge-Aggregation 1 and configure the interface to operate in dynamic mode.

[DeviceC] interface bridge-aggregation 1

[DeviceC-Bridge-Aggregation1] link-aggregation mode dynamic

[DeviceC-Bridge-Aggregation1] quit

# Assign GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to aggregation group 1.

[DeviceC] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/2

[DeviceC-if-range] port link-aggregation group 1

[DeviceC-if-range] quit

# Set the link type of Bridge-Aggregation 1 to trunk, and assign it to VLAN 10 and VLAN 20.

[DeviceC] interface bridge-aggregation 1

[DeviceC-Bridge-Aggregation1] port link-type trunk

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceC-Bridge-Aggregation1] port trunk permit vlan 10 20

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceC-Bridge-Aggregation1] quit

# Create VLAN-interface 100 as the uplink interface and assign it an IP address.

[DeviceC] interface vlan-interface 100

[DeviceC-Vlan-interface100] ip address 100.1.1.1 24

[DeviceC-Vlan-interface100] quit

# Create VLAN-interface 10 and VLAN-interface 20 and assign them IP addresses.

[DeviceC] interface vlan-interface 10

[DeviceC-vlan-interface10] ip address 10.1.1.1 24

[DeviceC-vlan-interface10] quit

[DeviceC] interface vlan-interface 20

[DeviceC-vlan-interface20] ip address 20.1.1.1 24

[DeviceC-vlan-interface20] quit

# Create VRRP group 1 on VLAN-interface 1 and set its virtual IP address to 10.1.1.10.

[DeviceC] interface vlan-interface 10

[DeviceC-Vlan-interface10] vrrp vrid 1 virtual-ip 10.1.1.100

# Set the priority of Device C to 200 for it to become the master in VRRP group 1, so it has the same role in the M-LAG system.

[DeviceC-Vlan-interface10] vrrp vrid 1 priority 200

[DeviceC-Vlan-interface10] quit

# Create VRRP group 2 on VLAN-interface 2 and set its virtual IP address to 20.1.1.10.

[DeviceC] interface vlan-interface 20

[DeviceC-Vlan-interface20] vrrp vrid 2 virtual-ip 20.1.1.100

[DeviceC-vlan-interface20] quit

# Configure Device C to operate in preemptive mode in VRRP group 1, and set the preemption delay to 500 centiseconds.

[DeviceC] interface vlan-interface 10

[DeviceC-Vlan-interface10] vrrp vrid 1 preempt-mode delay 500

[DeviceC-Vlan-interface10] quit

# Create track entry 1 associated with uplink interface GigabitEthernet 1/0/3.

[DeviceC] track 1 interface gigabitethernet 1/0/3

# Associate VRRP group 1 with track entry 1 and decrease the router priority of Device C by 150 when the state of track entry 1 changes to Negative.

[DeviceC] interface vlan-interface 10

[DeviceC-Vlan-interface10] vrrp vrid 1 track 1 priority reduced 150

[DeviceC-Vlan-interface10] quit

# Configure OSPF.

[DeviceC] ospf

[DeviceC-ospf-1] area 0

[DeviceC-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255

[DeviceC-ospf-1-area-0.0.0.0] network 20.1.1.0 0.0.0.255

[DeviceC-ospf-1-area-0.0.0.0] network 100.1.1.0 0.0.0.255

[DeviceC-ospf-1-area-0.0.0.0] quit

[DeviceC-ospf-1] quit

Configuring Device D

# Create VLANs 10, 20, and 200.

<DeviceD> system-view

[DeviceD] vlan 10

[DeviceD-vlan10] quit

[DeviceD] vlan 20

[DeviceD-vlan20] quit

[DeviceD] vlan 200

# Assign GigabitEthernet 1/0/3 to VLAN 200.

[DeviceD] vlan 200

[DeviceD-vlan200] port gigabitethernet 1/0/3

[DeviceD-vlan200] quit

# Create Layer 2 aggregate interface Bridge-Aggregation 2 and set its aggregation mode to dynamic.

[DeviceD] interface bridge-aggregation 2

[DeviceD-Bridge-Aggregation2] link-aggregation mode dynamic

[DeviceD-Bridge-Aggregation2] quit

# Assign GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to aggregation group 2.

[DeviceD] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/2

[DeviceD-if-range] port link-aggregation group 2

[DeviceD-if-range] quit

# Set the link type of Bridge-Aggregation 2 to trunk, and assign it to VLAN 10 and VLAN 20.

[DeviceD] interface bridge-aggregation 2

[DeviceD-Bridge-Aggregation2] port link-type trunk

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceD-Bridge-Aggregation2] port trunk permit vlan 10 20

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceD-Bridge-Aggregation2] quit

# Create VLAN-interface 200 as the uplink interface and assign it an IP address.

[DeviceD] interface vlan-interface 200

[DeviceD-Vlan-interface200] ip address 200.1.1.1 24

[DeviceD-Vlan-interface200] quit

# Create VLAN-interface 10 and VLAN-interface 20 and assign them IP addresses.

[DeviceD] interface vlan-interface 10

[DeviceD-vlan-interface10] ip address 10.1.1.2 24

[DeviceD-vlan-interface10] quit

[DeviceD] interface vlan-interface 20

[DeviceD-vlan-interface20] ip address 20.1.1.2 24

[DeviceD-vlan-interface20] quit

# Create VRRP group 1 on VLAN-interface 10 and set its virtual IP address to 10.1.1.100.

[DeviceD] interface vlan-interface 10

[DeviceD-Vlan-interface10] vrrp vrid 1 virtual-ip 10.1.1.100

[DeviceD-vlan-interface10] quit

# Create VRRP group 20 on VLAN-interface 2 and set its virtual IP address to 20.1.1.100.

[DeviceD] interface vlan-interface 20

[DeviceD-Vlan-interface20] vrrp vrid 2 virtual-ip 20.1.1.100

# Set the priority of Device D to 200 for it to become the master in VRRP group 2, so it has the same role in the M-LAG system.

[DeviceD-Vlan-interface20] vrrp vrid 2 priority 200

# Configure Device D to operate in preemptive mode in VRRP group 2, and set the preemption delay to 500 centiseconds.

[DeviceD-Vlan-interface20] vrrp vrid 2 preempt-mode delay 500

[DeviceD-Vlan-interface20] quit

# Create track entry 2 associated with uplink interface GigabitEthernet 1/0/3.

[DeviceD] track 2 interface gigabitethernet 1/0/3

# Associate VRRP group 2 with track entry 2 and decrease the router priority of Device D by 150 when the state of track entry 2 changes to Negative.

[DeviceD] interface vlan-interface 20

[DeviceD-Vlan-interface20] vrrp vrid 2 track 2 priority reduced 150

[DeviceD-Vlan-interface20] quit

# Configure OSPF.

[DeviceD] ospf

[DeviceD-ospf-1] area 0

[DeviceD-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255

[DeviceD-ospf-1-area-0.0.0.0] network 20.1.1.0 0.0.0.255

[DeviceD-ospf-1-area-0.0.0.0] network 200.1.1.0 0.0.0.255

[DeviceD-ospf-1-area-0.0.0.0] quit

[DeviceD-ospf-1] quit

Configuring Device E

# Create VLAN 100. Assign GigabitEthernet 1/0/1 to the VLAN.

<DeviceE> system-view

[DeviceE] vlan 100

[DeviceE-vlan100] port gigabitethernet 1/0/1

[DeviceE-vlan100] quit

# Create VLAN-interface 100 and assign it an IP address.

[DeviceE] interface vlan-interface 100

[DeviceE-vlan-interface100] ip address 100.1.1.2 24

[DeviceE-vlan-interface100] quit

# Create VLAN 200. Assign GigabitEthernet 1/0/2 to the VLAN.

[DeviceE] vlan 200

[DeviceE-vlan200] port gigabitethernet 1/0/2

[DeviceE-vlan200] quit

# Create VLAN-interface 200 and assign it an IP address.

[DeviceE] interface vlan-interface 200

[DeviceE-vlan-interface200] ip address 200.1.1.2 24

[DeviceE-vlan-interface200] quit

# Create VLAN 30. Assign GigabitEthernet 1/0/3 to the VLAN.

[DeviceE] vlan 30

[DeviceE-vlan30] port gigabitethernet 1/0/3

[DeviceE-vlan30] quit

# Create VLAN-interface 30 and assign it an IP address.

[DeviceE] interface vlan-interface 30

[DeviceE-vlan-interface30] ip address 30.1.1.1 24

[DeviceE-vlan-interface30] quit

# Configure OSPF.

[DeviceD] ospf

[DeviceD-ospf-1] area 0

[DeviceD-ospf-1-area-0.0.0.0] network 100.1.1.0 0.0.0.255

[DeviceD-ospf-1-area-0.0.0.0] network 200.1.1.0 0.0.0.255

[DeviceD-ospf-1-area-0.0.0.0] network 30.1.1.0 0.0.0.255

[DeviceD-ospf-1-area-0.0.0.0] quit

[DeviceD-ospf-1] quit

Configuring Device F

# Create VLAN 10 and VLAN 20.

[DeviceF] vlan 10

[DeviceF-vlan10] quit

[DeviceF] vlan 20

[DeviceF-vlan20] quit

# Create dynamic Layer 2 aggregate interface Bridge-aggregation 4.

[DeviceF] interface bridge-aggregation 4

[DeviceF-Bridge-Aggregation4] link-aggregation mode dynamic

[DeviceF-Bridge-Aggregation4] quit

# Assign GigabitEthernet 1/0/1 through GigabitEthernet 1/0/4 to aggregation group 4.

[DeviceF] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/4

[DeviceF-if-range] port link-aggregation group 4

[DeviceF-if-range] quit

# Set the link type of Bridge-Aggregation 4 to trunk, and assign it to VLAN 10 and VLAN 20.

[DeviceF] interface bridge-aggregation 4

[DeviceF-Bridge-Aggregation4] port link-type trunk

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

Configuring GigabitEthernet1/0/3 done.

Configuring GigabitEthernet1/0/4 done.

[DeviceF-Bridge-Aggregation4] port trunk permit vlan 10 20

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

Configuring GigabitEthernet1/0/3 done.

Configuring GigabitEthernet1/0/4 done.

[DeviceF-Bridge-Aggregation4] quit

Verifying the configuration

# Display summary information about the peer-link interface and M-LAG interfaces on Device A. Verify that Device A and Device B have successfully formed an M-LAG system.

[DeviceA] display m-lag summary

Flags: A -- Aggregate interface down, B -- No peer M-LAG interface configured

       C -- Configuration consistency check failed

 

Peer-link interface: BAGG3

Peer-link interface state (cause): UP

Keepalive link state (cause): UP

 

                     M-LAG interface information

M-LAG IF    M-LAG group  Local state (cause)  Peer state  Remaining down time(s)

BAGG4       4            UP                   UP          -

[DeviceA] display m-lag verbose

Flags: A -- Home_Gateway, B -- Neighbor_Gateway, C -- Other_Gateway,

       D -- PeerLink_Activity, E -- DRCP_Timeout, F -- Gateway_Sync,

       G -- Port_Sync, H -- Expired

 

Peer-link interface/Peer-link interface ID: BAGG3/1

State: UP

Cause: -

Local DRCP flags/Peer DRCP flags: ABDFG/ABDFG

Local Selected ports (index): GE1/0/3 (2), GE1/0/4 (5)

Peer Selected ports indexes: 2, 5

 

M-LAG interface/M-LAG group ID: BAGG4/4

Local M-LAG interface state: UP

Peer M-LAG interface state: UP

M-LAG group state: UP

Local M-LAG interface down cause: -

Remaining M-LAG DOWN time: -

Local M-LAG interface LACP MAC: Config=0001-0001-0001, Effective=0001-0001-0001

Peer M-LAG interface LACP MAC: Config=0001-0001-0001, Effective=0001-0001-0001

Local M-LAG interface LACP priority: Config=32768, Effective=123

Peer M-LAG interface LACP priority: Config=32768, Effective=123

Local DRCP flags/Peer DRCP flags: ABDFG/ABDFG

Local Selected ports (index): GE1/0/1 (16385), GE1/0/2 (16388)

Peer Selected ports indexes: 32769, 32772

# On Device F, display detailed information about the aggregation groups that correspond to the specified aggregate interfaces. Interfaces GigabitEthernet 1/0/1 through GigabitEthernet 1/0/4 on Device F are all in Selected state,. In this case, Device F considers Device A and Device B as a single device, thereby achieving cross-device aggregation.

[DeviceF] display link-aggregation verbose

Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing

Port Status: S -- Selected, U -- Unselected, I -- Individual

Port: A -- Auto port, M -- Management port, R -- Reference port

Flags:  A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,

        D -- Synchronization, E -- Collecting, F -- Distributing,

        G -- Defaulted, H -- Expired

 

Aggregate Interface: Bridge-Aggregation4

Creation Mode: Manual

Aggregation Mode: Dynamic

Loadsharing Type: Shar

Management VLANs: None

System ID: 0x8000, 1eba-3c46-0300

Local:

  Port                Status   Priority Index    Oper-Key               Flag

  GE1/0/1             S        32768    1        1                      {ACDEF}

  GE1/0/2             S        32768    2        1                      {ACDEF}

  GE1/0/3             S        32768    3        1                      {ACDEF}

  GE1/0/4             S        32768    4        1                      {ACDEF}

Remote:

  Actor               Priority Index    Oper-Key SystemID               Flag

  GE1/0/1(R)          32768    16385    40004    0x7b  , 0001-0001-0001 {ACDEF}

  GE1/0/2             32768    16388    40004    0x7b  , 0001-0001-0001 {ACDEF}

  GE1/0/3             32768    32769    40004    0x7b  , 0001-0001-0001 {ACDEF}

  GE1/0/4             32768    32772    40004    0x7b  , 0001-0001-0001 {ACDEF}

# Display VRRP group information on Device C and Device D. Device C is the master device in VRRP group 1, and Device D is the master device in VRRP group 2, ensuring that hosts in area A communicate externally through Device C and hosts in area B communicate externally through Device D.

[DeviceC] display vrrp

IPv4 Virtual Router Information:

 Running mode : Standard

 Total number of virtual routers : 2

 Interface          VRID  State        Running Adver   Auth     Virtual

                                       Pri     Timer   Type        IP

 ---------------------------------------------------------------------

 Vlan10             1     Master       200     100     None     10.1.1.100

 Vlan20             2     Backup       100     100     None     20.1.1.100

[DeviceD] display vrrp

IPv4 Virtual Router Information:

 Running mode : Standard

 Total number of virtual routers : 2

 Interface          VRID  State        Running Adver   Auth     Virtual

                                       Pri     Timer   Type        IP

 ---------------------------------------------------------------------

 Vlan10             1     Backup       100     100     None     10.1.1.100

 Vlan20             2     Master       200     100     None     20.1.1.100

# Display the OSPF neighbor information of Device E. The output shows that Device E has established neighbors with Device C and Device D to ensure Layer 3 connectivity.

[DeviceE] display ospf peer

 

         OSPF Process 1 with Router ID 200.1.1.2

               Neighbor Brief Information

 

 Area: 0.0.0.0

 Router ID       Address         Pri Dead-Time  State             Interface

 100.1.1.1       100.1.1.1       1   35         Full/BDR          Vlan100

 200.1.1.1       200.1.1.1       1   33         Full/BDR          Vlan200

# Verify that you can successfully ping 30.1.1.1 on a host in area A.

C:\Documents and Settings\Administrator>ping 30.1.1.1

 

Pinging 30.1.1.1 with 32 bytes of data:

 

Reply from 30.1.1.1: bytes=32 time=1ms TTL=126

Reply from 30.1.1.1: bytes=32 time=1ms TTL=126

Reply from 30.1.1.1: bytes=32 time=1ms TTL=126

Reply from 30.1.1.1: bytes=32 time=1ms TTL=126

 

Ping statistics for 30.1.1.1:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 1ms, Maximum = 1ms, Average = 1ms

Configuration files

·     Device A:

#

vlan 10

#

vlan 20

#

interface Bridge-Aggregation1

 port link-type trunk

 port trunk permit vlan 1 10 20

 link-aggregation mode dynamic

#

interface Bridge-Aggregation3

 port link-type trunk

 port trunk permit vlan all

 link-aggregation mode dynamic

 port m-lag peer-link 1

#

interface Bridge-Aggregation4

 port link-type trunk

 port trunk permit vlan 1 10 20

 link-aggregation mode dynamic

 port m-lag group 4

#

interface GigabitEthernet1/0/5

 port link-mode route

 ip address 1.1.1.1 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 4

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 4

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 3

#

interface GigabitEthernet1/0/4

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 3

#

interface GigabitEthernet1/0/6

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 1

#

interface GigabitEthernet1/0/7

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 1

#

 m-lag system-mac 0001-0001-0001

 m-lag system-number 1

 m-lag system-priority 123

 m-lag keepalive ip destination 1.1.1.2 source 1.1.1.1

#

 m-lag mad exclude interface GigabitEthernet1/0/5

#

·     Device B:

#

vlan 10

#

vlan 20

#

interface Bridge-Aggregation2

 port link-type trunk

 port trunk permit vlan 1 10 20

 link-aggregation mode dynamic

#

interface Bridge-Aggregation3

 port link-type trunk

 port trunk permit vlan all

 link-aggregation mode dynamic

 port m-lag peer-link 1

#

interface Bridge-Aggregation4

 port link-type trunk

 port trunk permit vlan 1 10 20

 link-aggregation mode dynamic

 port m-lag group 4

#

interface GigabitEthernet1/0/5

 port link-mode route

 ip address 1.1.1.2 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 4

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 4

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 3

#

interface GigabitEthernet1/0/4

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 3

#

interface GigabitEthernet1/0/6

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 2

#

interface GigabitEthernet1/0/7

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 2

#

 m-lag system-mac 0001-0001-0001

 m-lag system-number 2

 m-lag system-priority 123

 m-lag keepalive ip destination 1.1.1.1 source 1.1.1.2

#

 m-lag mad exclude interface GigabitEthernet1/0/5

#

·     Device C:

#

ospf 1

 area 0.0.0.0

  network 10.1.1.0 0.0.0.255

  network 20.1.1.0 0.0.0.255

  network 100.1.1.0 0.0.0.255

#

vlan 10

#

vlan 20

#

vlan 100

#

interface Bridge-Aggregation1

 port link-type trunk

 port trunk permit vlan 1 10 20

 link-aggregation mode dynamic

#

interface Vlan-interface10

 ip address 10.1.1.1 255.255.255.0

 vrrp vrid 1 virtual-ip 10.1.1.100

 vrrp vrid 1 priority 200

 vrrp vrid 1 preempt-mode delay 500

 vrrp vrid 1 track 1 priority reduced 150

#

interface Vlan-interface20

 ip address 20.1.1.1 255.255.255.0

 vrrp vrid 2 virtual-ip 20.1.1.100

#

interface Vlan-interface100

 ip address 100.1.1.1 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 1

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 1

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port access vlan 100

#

 track 1 interface GigabitEthernet1/0/3

#

·     Device D:

#

ospf 1

 area 0.0.0.0

  network 10.1.1.0 0.0.0.255

  network 20.1.1.0 0.0.0.255

  network 200.1.1.0 0.0.0.255

#

vlan 10

#

vlan 20

#

vlan 200

#

interface Bridge-Aggregation2

 port link-type trunk

 port trunk permit vlan 1 10 20

 link-aggregation mode dynamic

#

interface Vlan-interface10

 ip address 10.1.1.2 255.255.255.0

 vrrp vrid 1 virtual-ip 10.1.1.100

#

interface Vlan-interface20

 ip address 20.1.1.2 255.255.255.0

 vrrp vrid 2 virtual-ip 20.1.1.100

 vrrp vrid 2 priority 200

 vrrp vrid 2 preempt-mode delay 500

 vrrp vrid 2 track 2 priority reduced 150

#

interface Vlan-interface200

 ip address 200.1.1.1 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 2

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 2

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port access vlan 200

#

 track 2 interface GigabitEthernet1/0/3

#

·     Device E:

#

ospf 1

 area 0.0.0.0

  network 30.1.1.0 0.0.0.255

  network 100.1.1.0 0.0.0.255

  network 200.1.1.0 0.0.0.255

#

vlan 30

#

vlan 100

#

vlan 200

#

interface Vlan-interface30

 ip address 30.1.1.1 255.255.255.0

#

interface Vlan-interface100

 ip address 100.1.1.2 255.255.255.0

#

interface Vlan-interface200

 ip address 200.1.1.2 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port access vlan 100

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port access vlan 200

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port access vlan 30

#

·     Device F:

#

vlan 10

#

vlan 20

#

interface Bridge-Aggregation4

 port link-type trunk

 port trunk permit vlan 1 10 20

 link-aggregation mode dynamic

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 4

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 4

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 4

#

interface GigabitEthernet1/0/4

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 10 20

 port link-aggregation group 4

#

Example: Configuring distribution-layer M-LAG

Network configuration

As shown in Figure 2, Device A and Device B are distribution layer devices. Deploy M-LAG and VRRP on Device A and Device B to meet the following requirements:

·     When a link on Device A fails, traffic can quickly switch to the link on Device B to ensure reliability. To efficiently utilize bandwidth, Device A and Device B can simultaneously forward packets through their links to achieve load sharing.

·     When the gateways are operating normally, users in area A use gateway Device A for data forwarding while the users in area B use gateway Device B for data forwarding to achieving traffic load sharing.

·     When Device A or its uplink interface fails, Device B can quickly take over the task of forwarding host traffic in area A. After Device A recovers from the failure, it resumes its role as the gateway for VRRP group 1.

·     When Device B or its uplink interface fails, Device A can quickly take over the task of forwarding host traffic in area B. After Device B recovers from the failure, it resumes its role as the gateway for VRRP group 2.

·     Set up an OSPF network on Device A, Device B, and Device E. Use OSPF on Device A and Device B to advertise routes for the subnets where hosts in areas A and B are located. This configuration enables Layer 3 communication between hosts in areas A and B and the external network.

Figure 2 Network diagram

 

 

Analysis

·     Assign IP addresses to the interfaces used for M-LAG keepalive detection excluded from the shutdown action by M-LAG MAD on Device A and Device B. Make sure the interfaces can communicate at Layer 3.

·     To make Device A and B become the master devices of VRRP groups 1 and 2, respectively, configure a higher priority for Device A in VRRP group 1 and a higher priority for Device B in VRRP group 2.

Applicable hardware and software versions

The following matrix shows the hardware and software versions to which this configuration example is applicable:

 

 

Restrictions and guidelines

When configuring M-LAG, follow these restrictions and guidelines:

·     Make sure all M-LAG member devices have the same system MAC address and priority but different system numbers.

·     Only one peer link can be configured on an M-LAG device.

·     As a best practice, exclude the keepalive interface from the shutdown action by M-LAG MAD to prevent it from being set to the MAD DOWN state during the M-LAG setup process, which could lead to detection errors.

When configuring VRRP, follow these restrictions and guidelines:

·     The virtual IP address of a VRRP group cannot be 0.0.0.0, 255.255.255.255, loopback address, non-class-A/B/C address, or other illegal IP addresses such as 0.0.0.1.

·     As a best practice, configure the virtual IP address of a VRRP group and the IP addresses of the group member devices' downlink interfaces to be in the same subnet. If you cannot do that, hosts in the LAN might fail to access the external network.

For the S5570S-EI, S5500V3-SI, S3600V3-EI, and S3600V3-SI switch series, before switching a Layer 2 Ethernet interface to a Layer 3 Ethernet interface or creating a Layer 3 aggregate interface, use the reserve-vlan-interface command to reserve local VLAN interface resources. For more information about the reserve-vlan-interface command, see the VLAN configuration and VLAN commands for your product.

Procedures

Configuring Device A

# Configure the M-LAG system parameters.

<DeviceA> system-view

[DeviceA] m-lag system-mac 1-1-1

Changing the system MAC might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

[DeviceA] m-lag system-number 1

Changing the system number might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

[DeviceA] m-lag system-priority 123

Changing the system priority might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

# Configure the destination and source IP addresses of keepalive packets.

[DeviceA] m-lag keepalive ip destination 1.1.1.2 source 1.1.1.1

# Set the link mode of GigabitEthernet 1/0/5 to Layer 3, and assign the interface an IP address. The IP address will be used as the source IP address of keepalive packets.

[DeviceA] interface gigabitethernet 1/0/5

[DeviceA-GigabitEthernet1/0/5] port link-mode route

[DeviceA-GigabitEthernet1/0/5] ip address 1.1.1.1 24

[DeviceA-GigabitEthernet1/0/5] quit

# Exclude the interface used for M-LAG keepalive detection from the shutdown action by MAD.

[DeviceA] m-lag mad exclude interface gigabitethernet 1/0/5

# Create dynamic Layer 2 aggregate interface Bridge-aggregation 125.

[DeviceA] interface bridge-aggregation 125

[DeviceA-Bridge-Aggregation125] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation125] quit

# Assign GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 to aggregation group 125.

[DeviceA] interface gigabitethernet 1/0/3

[DeviceA-GigabitEthernet1/0/3] port link-aggregation group 125

[DeviceA-GigabitEthernet1/0/3] quit

[DeviceA] interface gigabitethernet 1/0/4

[DeviceA-GigabitEthernet1/0/4] port link-aggregation group 125

[DeviceA-GigabitEthernet1/0/4] quit

# Configure Layer 2 aggregate interface Bridge-Aggregation 125 as the peer link interface.

[DeviceA] interface bridge-aggregation 125

[DeviceA-Bridge-Aggregation125] port m-lag peer-link 1

[DeviceA-Bridge-Aggregation125] quit

# Create dynamic Layer 2 dynamic aggregate interface Bridge-Aggregation 100, and configure it as M-LAG interface 1.

[DeviceA] interface bridge-aggregation 100

[DeviceA-Bridge-Aggregation100] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation100] port m-lag group 1

[DeviceA-Bridge-Aggregation100] quit

# Assign GigabitEthernet 1/0/1 to aggregation group 100.

[DeviceA] interface gigabitethernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] port link-aggregation group 100

[DeviceA-GigabitEthernet1/0/1] quit

# Create dynamic Layer 2 dynamic aggregate interface Bridge-Aggregation 101, and configure it as M-LAG interface 2.

[DeviceA] interface bridge-aggregation 101

[DeviceA-Bridge-Aggregation101] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation101] port m-lag group 2

[DeviceA-Bridge-Aggregation101] quit

# Assign GigabitEthernet 1/0/2 to aggregation group 101.

[DeviceA] interface gigabitethernet 1/0/2

[DeviceA-GigabitEthernet1/0/2] port link-aggregation group 101

[DeviceA-GigabitEthernet1/0/2] quit

# Create VLANs 10, 100, and 101.

[DeviceA] vlan 10

[DeviceA-vlan10] quit

[DeviceA] vlan 100

[DeviceA-vlan100] quit

[DeviceA] vlan 101

[DeviceA-vlan101] quit

# Assign GigabitEthernet 1/0/6 to VLAN 10.

[DeviceA] vlan 10

[DeviceA-vlan10] port gigabitethernet 1/0/6

[DeviceA-vlan10] quit

# Set the link type of Bridge-Aggregation 100 to trunk, and assign it to VLAN 100.

[DeviceA] interface bridge-aggregation 100

[DeviceA-Bridge-Aggregation100] port link-type trunk

Configuring GigabitEthernet1/0/1 done.

[DeviceA-Bridge-Aggregation100] port trunk permit vlan 100

Configuring GigabitEthernet1/0/1 done.

[DeviceA-Bridge-Aggregation100] quit

# Set the link type of Bridge-Aggregation 101 to trunk, and assign it to VLAN 101.

[DeviceA] interface bridge-aggregation 101

[DeviceA-Bridge-Aggregation101] port link-type trunk

Configuring GigabitEthernet1/0/2 done.

[DeviceA-Bridge-Aggregation101] port trunk permit vlan 101

Configuring GigabitEthernet1/0/2 done.

[DeviceA-Bridge-Aggregation101] quit

# Create VLAN-interface 10, VLAN-interface 20, and VLAN-interface 101 and assign them IP addresses.

[DeviceA] interface vlan-interface 10

[DeviceA-vlan-interface10] ip address 10.1.1.1 24

[DeviceA-vlan-interface10] quit

[DeviceA] interface vlan-interface 100

[DeviceA-vlan-interface100] ip address 100.1.1.1 24

[DeviceA-vlan-interface100] quit

[DeviceA] interface vlan-interface 101

[DeviceA-vlan-interface101] ip address 101.1.1.1 24

[DeviceA-vlan-interface101] quit

# Configure OSPF.

[DeviceA] ospf

[DeviceA-ospf-1] area 0

[DeviceA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255

[DeviceA-ospf-1-area-0.0.0.0] network 100.1.1.0 0.0.0.255

[DeviceA-ospf-1-area-0.0.0.0] network 101.1.1.0 0.0.0.255

[DeviceA-ospf-1-area-0.0.0.0] quit

[DeviceA-ospf-1] quit

# Create VRRP group 1 on VLAN-interface 100 and set its virtual IP address to 100.1.1.100.

[DeviceA] interface vlan-interface 100

[DeviceA-Vlan-interface100] vrrp vrid 1 virtual-ip 100.1.1.100

# Set the priority of Device A to 200 for it to become the master in VRRP group 1, so it has the same role in the M-LAG system.

[DeviceA-Vlan-interface100] vrrp vrid 1 priority 200

[DeviceA-Vlan-interface100] quit

# Create VRRP group 2 on VLAN-interface 101 and set its virtual IP address to 101.1.1.100.

[DeviceA] interface vlan-interface 101

[DeviceA-Vlan-interface101] vrrp vrid 2 virtual-ip 101.1.1.100

[DeviceA-Vlan-interface101] quit

# Configure Device A to operate in preemptive mode in VRRP group 1, and set the preemption delay to 500 centiseconds.

[DeviceA] interface vlan-interface 100

[DeviceA-Vlan-interface100] vrrp vrid 1 preempt-mode delay 500

[DeviceA-Vlan-interface100] quit

# Create track entry 1 associated with uplink interface GigabitEthernet 1/0/6.

[DeviceA] track 1 interface gigabitethernet 1/0/6

# Associate VRRP group 1 with track entry 1 and decrease the router priority of Device A by 150 when the state of track entry 1 changes to Negative.

[DeviceA] interface vlan-interface 100

[DeviceA-Vlan-interface100] vrrp vrid 1 track 1 priority reduced 150

[DeviceA-Vlan-interface100] quit

Configuring Device B

# Configure the M-LAG system parameters.

<DeviceB> system-view

[DeviceB] m-lag system-mac 1-1-1

Changing the system MAC might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

[DeviceB] m-lag system-number 2

Changing the system number might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

[DeviceB] m-lag system-priority 123

Changing the system priority might flap the intra-portal link and cause M-LAG system setup failure. Continue? [Y/N]:y

# Configure the destination and source IP addresses of keepalive packets.

[DeviceB] m-lag keepalive ip destination 1.1.1.1 source 1.1.1.2

# Set the link mode of GigabitEthernet 1/0/5 to Layer 3, and assign the interface an IP address. The IP address will be used as the source IP address of keepalive packets.

[DeviceB] interface gigabitethernet 1/0/5

[DeviceB-GigabitEthernet1/0/5] port link-mode route

[DeviceB-GigabitEthernet1/0/5] ip address 1.1.1.2 24

[DeviceB-GigabitEthernet1/0/5] quit

# Exclude the interface used for M-LAG keepalive detection from the shutdown action by MAD.

[DeviceB] m-lag mad exclude interface gigabitethernet 1/0/5

# Create dynamic Layer 2 aggregate interface Bridge-aggregation 125.

[DeviceB] interface bridge-aggregation 125

[DeviceB-Bridge-Aggregation125] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation125] quit

# Assign GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 to aggregation group 125.

[DeviceB] interface gigabitethernet 1/0/3

[DeviceB-GigabitEthernet1/0/3] port link-aggregation group 125

[DeviceB-GigabitEthernet1/0/3] quit

[DeviceB] interface gigabitethernet 1/0/4

[DeviceB-GigabitEthernet1/0/4] port link-aggregation group 125

[DeviceB-GigabitEthernet1/0/4] quit

# Configure Layer 2 aggregate interface Bridge-Aggregation 125 as the peer link interface.

[DeviceB] interface bridge-aggregation 125

[DeviceB-Bridge-Aggregation125] port m-lag peer-link 1

[DeviceB-Bridge-Aggregation125] quit

# Create dynamic Layer 2 dynamic aggregate interface Bridge-Aggregation 100, and configure it as M-LAG interface 1.

[DeviceB] interface bridge-aggregation 100

[DeviceB-Bridge-Aggregation100] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation100] port m-lag group 1

[DeviceB-Bridge-Aggregation100] quit

# Assign GigabitEthernet 1/0/2 to aggregation group 100.

[DeviceB] interface gigabitethernet 1/0/2

[DeviceB-GigabitEthernet1/0/2] port link-aggregation group 100

[DeviceB-GigabitEthernet1/0/2] quit

# Create dynamic Layer 2 dynamic aggregate interface Bridge-Aggregation 101, and configure it as M-LAG interface 2.

[DeviceB] interface bridge-aggregation 101

[DeviceB-Bridge-Aggregation101] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation101] port m-lag group 2

[DeviceB-Bridge-Aggregation101] quit

# Assign GigabitEthernet 1/0/1 to aggregation group 101.

[DeviceB] interface gigabitethernet 1/0/1

[DeviceB-GigabitEthernet1/0/1] port link-aggregation group 101

[DeviceB-GigabitEthernet1/0/1] quit

# Create VLANs 20, 100, and 101.

[DeviceB] vlan 20

[DeviceB-vlan20] quit

[DeviceB] vlan 100

[DeviceB-vlan100] quit

[DeviceB] vlan 101

[DeviceB-vlan101] quit

# Assign GigabitEthernet 1/0/6 to VLAN 20.

[DeviceB] vlan 20

[DeviceB-vlan20] port gigabitethernet 1/0/6

[DeviceB-vlan20] quit

# Set the link type of Bridge-Aggregation 100 to trunk, and assign it to VLAN 100.

[DeviceB] interface bridge-aggregation 100

[DeviceB-Bridge-Aggregation100] port link-type trunk

Configuring GigabitEthernet1/0/2 done.

[DeviceB-Bridge-Aggregation100] port trunk permit vlan 100

Configuring GigabitEthernet1/0/2 done.

[DeviceB-Bridge-Aggregation100] quit

# Set the link type of Bridge-Aggregation 101 to trunk, and assign it to VLAN 101.

[DeviceB] interface bridge-aggregation 101

[DeviceB-Bridge-Aggregation101] port link-type trunk

Configuring GigabitEthernet1/0/1 done.

[DeviceB-Bridge-Aggregation101] port trunk permit vlan 101

Configuring GigabitEthernet1/0/1 done.

[DeviceB-Bridge-Aggregation101] quit

# Create VLAN-interface 20, VLAN-interface 100, and VLAN-interface 101 and assign them IP addresses.

[DeviceB] interface vlan-interface 20

[DeviceB-vlan-interface20] ip address 20.1.1.1 24

[DeviceB-vlan-interface20] quit

[DeviceB] interface vlan-interface 100

[DeviceB-vlan-interface100] ip address 100.1.1.2 24

[DeviceB-vlan-interface100] quit

[DeviceB] interface vlan-interface 101

[DeviceB-vlan-interface101] ip address 101.1.1.2 24

[DeviceB-vlan-interface101] quit

# Configure OSPF.

[DeviceB] ospf

[DeviceB-ospf-1] area 0

[DeviceB-ospf-1-area-0.0.0.0] network 20.1.1.0 0.0.0.255

[DeviceB-ospf-1-area-0.0.0.0] network 100.1.1.0 0.0.0.255

[DeviceB-ospf-1-area-0.0.0.0] network 101.1.1.0 0.0.0.255

[DeviceB-ospf-1-area-0.0.0.0] quit

[DeviceB-ospf-1] quit

# Create VRRP group 1 on VLAN-interface 100 and set its virtual IP address to 100.1.1.100.

[DeviceB] interface vlan-interface 100

[DeviceB-Vlan-interface100] vrrp vrid 1 virtual-ip 100.1.1.100

[DeviceB-Vlan-interface100] quit

# Create VRRP group 2 on VLAN-interface 101 and set its virtual IP address to 101.1.1.100.

[DeviceB] interface vlan-interface 101

[DeviceB-Vlan-interface101] vrrp vrid 2 virtual-ip 101.1.1.100

# Set the priority of Device B to 200 for it to become the master in VRRP group 2, so it has the same role in the M-LAG system.

[DeviceA-Vlan-interface101] vrrp vrid 2 priority 200

# Configure Device B to operate in preemptive mode in VRRP group 2, and set the preemption delay to 500 centiseconds.

[DeviceB-Vlan-interface101] vrrp vrid 2 preempt-mode delay 500

[DeviceB-Vlan-interface101] quit

# Create track entry 2 associated with uplink interface GigabitEthernet 1/0/6.

[DeviceB] track 2 interface gigabitethernet 1/0/6

# Associate VRRP group 2 with track entry 2 and decrease the router priority of Device B by 150 when the state of track entry 2 changes to Negative.

[DeviceB] interface vlan-interface 101

[DeviceB-Vlan-interface101] vrrp vrid 2 track 2 priority reduced 150

[DeviceB-Vlan-interface101] quit

Configuring Device C

# Create VLAN 100.

[DeviceC] vlan 100

[DeviceC-vlan100] quit

# Assign GigabitEthernet 1/0/3 to VLAN 100.

[DeviceC] interface gigabitethernet 1/0/3

[DeviceC-GigabitEthernet1/0/3] port access vlan 100

[DeviceC-GigabitEthernet1/0/3] quit

# Create Layer 2 aggregate interface Bridge-Aggregation 100 and configure the interface to operate in dynamic mode.

<DeviceC> system-view

[DeviceC] interface bridge-aggregation 100

[DeviceC-Bridge-Aggregation100] link-aggregation mode dynamic

[DeviceC-Bridge-Aggregation100] quit

# Assign GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to aggregation group 100.

[DeviceC] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/2

[DeviceC-if-range] port link-aggregation group 100

[DeviceC-if-range] quit

# Set the link type of Bridge-Aggregation 100 to trunk, and assign it to VLAN 100.

[DeviceC] interface bridge-aggregation 100

[DeviceC-Bridge-Aggregation100] port link-type trunk

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceC-Bridge-Aggregation100] port trunk permit vlan 100

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceC-Bridge-Aggregation100] quit

Configuring Device D

# Create VLAN 101.

[DeviceD] vlan 101

[DeviceD-vlan101] quit

# Assign GigabitEthernet 1/0/3 to VLAN 101.

[DeviceD] interface gigabitethernet 1/0/3

[DeviceD-GigabitEthernet1/0/3] port access vlan 101

[DeviceD-GigabitEthernet1/0/3] quit

# Create Layer 2 aggregate interface Bridge-Aggregation 101 and configure the interface to operate in dynamic mode.

<DeviceD> system-view

[DeviceD] interface bridge-aggregation 101

[DeviceD-Bridge-Aggregation101] link-aggregation mode dynamic

[DeviceD-Bridge-Aggregation101] quit

# Assign GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to aggregation group 101.

[DeviceD] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/2

[DeviceD-if-range] port link-aggregation group 101

[DeviceD-if-range] quit

# Set the link type of Bridge-Aggregation 101 to trunk, and assign it to VLAN 101.

[DeviceD] interface bridge-aggregation 101

[DeviceD-Bridge-Aggregation101] port link-type trunk

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceD-Bridge-Aggregation101] port trunk permit vlan 101

Configuring GigabitEthernet1/0/1 done.

Configuring GigabitEthernet1/0/2 done.

[DeviceD-Bridge-Aggregation101] quit

Configuring Device E

# Create VLAN 10. Assign GigabitEthernet 1/0/1 to the VLAN.

<DeviceE> system-view

[DeviceE] vlan 10

[DeviceE-vlan10] port gigabitethernet 1/0/1

[DeviceE-vlan10] quit

# Create VLAN-interface 10 and assign it an IP address.

[DeviceE] interface vlan-interface 10

[DeviceE-vlan-interface10] ip address 10.1.1.2 24

[DeviceE-vlan-interface10] quit

# Create VLAN 20. Assign GigabitEthernet 1/0/2 to the VLAN.

[DeviceE] vlan 20

[DeviceE-vlan20] port gigabitethernet 1/0/2

[DeviceE-vlan20] quit

# Create VLAN-interface 20 and assign it an IP address.

[DeviceE] interface vlan-interface 20

[DeviceE-vlan-interface20] ip address 20.1.1.2 24

[DeviceE-vlan-interface20] quit

# Create VLAN 30. Assign GigabitEthernet 1/0/3 to the VLAN.

[DeviceE] vlan 30

[DeviceE-vlan30] port gigabitethernet 1/0/3

[DeviceE-vlan30] quit

# Create VLAN-interface 30 and assign it an IP address.

[DeviceE] interface vlan-interface 30

[DeviceE-vlan-interface30] ip address 30.1.1.1 24

[DeviceE-vlan-interface30] quit

# Configure OSPF.

[DeviceE] ospf

[DeviceE-ospf-1] area 0

[DeviceE-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255

[DeviceE-ospf-1-area-0.0.0.0] network 20.1.1.0 0.0.0.255

[DeviceE-ospf-1-area-0.0.0.0] network 30.1.1.0 0.0.0.255

[DeviceE-ospf-1-area-0.0.0.0] quit

[DeviceE-ospf-1] quit

Verifying the configuration

# Display summary information about the peer-link interface and M-LAG interfaces on Device A. Verify that Device A and Device B have successfully formed an M-LAG system.

[DeviceA] display m-lag summary

Flags: A -- Aggregate interface down, B -- No peer M-LAG interface configured

       C -- Configuration consistency check failed

 

Peer-link interface: BAGG125

Peer-link interface state (cause): UP

Keepalive link state (cause): UP

 

                     M-LAG interface information

M-LAG IF    M-LAG group  Local state (cause)  Peer state  Remaining down time(s)

BAGG100     1            UP                   UP          -

BAGG101     2            UP                   UP          -

[DeviceA] display m-lag verbose

Flags: A -- Home_Gateway, B -- Neighbor_Gateway, C -- Other_Gateway,

       D -- PeerLink_Activity, E -- DRCP_Timeout, F -- Gateway_Sync,

       G -- Port_Sync, H -- Expired

 

Peer-link interface/Peer-link interface ID: BAGG125/1

State: UP

Cause: -

Local DRCP flags/Peer DRCP flags: ABDFG/ABDFG

Local Selected ports (index): GE1/0/3 (1), GE1/0/4 (4)

Peer Selected ports indexes: 1, 4

 

M-LAG interface/M-LAG group ID: BAGG100/1

Local M-LAG interface state: UP

Peer M-LAG interface state: UP

M-LAG group state: UP

Local M-LAG interface down cause: -

Remaining M-LAG DOWN time: -

Local M-LAG interface LACP MAC: Config=0001-0001-0001, Effective=0001-0001-0001

Peer M-LAG interface LACP MAC: Config=0001-0001-0001, Effective=0001-0001-0001

Local M-LAG interface LACP priority: Config=32768, Effective=123

Peer M-LAG interface LACP priority: Config=32768, Effective=123

Local DRCP flags/Peer DRCP flags: ABDFG/ABDFG

Local Selected ports (index): GE1/0/1 (16386)

Peer Selected ports indexes: 32771

 

M-LAG interface/M-LAG group ID: BAGG101/2

Local M-LAG interface state: UP

Peer M-LAG interface state: UP

M-LAG group state: UP

Local M-LAG interface down cause: -

Remaining M-LAG DOWN time: -

Local M-LAG interface LACP MAC: Config=0001-0001-0001, Effective=0001-0001-0001

Peer M-LAG interface LACP MAC: Config=0001-0001-0001, Effective=0001-0001-0001

Local M-LAG interface LACP priority: Config=32768, Effective=123

Peer M-LAG interface LACP priority: Config=32768, Effective=123

Local DRCP flags/Peer DRCP flags: ABDFG/ABDFG

Local Selected ports (index): GE1/0/2 (16387)

Peer Selected ports indexes: 32772

# On Device C and Device D, display the detailed information for Layer 2 aggregation group 100 and Layer 2 aggregation group 101, separately. Interfaces GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 on Device C and Device D are all in Selected state. In this case, Device C and Device D consider Device A and Device B as a single device, thereby achieving cross-device aggregation.

[DeviceC] display link-aggregation verbose

Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing

Port Status: S -- Selected, U -- Unselected, I -- Individual

Port: A -- Auto port, M -- Management port, R -- Reference port

Flags:  A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,

        D -- Synchronization, E -- Collecting, F -- Distributing,

        G -- Defaulted, H -- Expired

 

Aggregate Interface: Bridge-Aggregation100

Creation Mode: Manual

Aggregation Mode: Dynamic

Loadsharing Type: Shar

Management VLANs: None

System ID: 0x8000, 8e33-8e4a-0300

Local:

  Port                Status   Priority Index    Oper-Key               Flag

  GE1/0/1             S        32768    1        1                      {ACDEF}

  GE1/0/2             S        32768    2        1                      {ACDEF}

Remote:

  Actor               Priority Index    Oper-Key SystemID               Flag

  GE1/0/1(R)          32768    16386    40001    0x7b  , 0001-0001-0001 {ACDEF}

  GE1/0/2             32768    32770    40001    0x7b  , 0001-0001-0001 {ACDEF}

[DeviceD] display link-aggregation verbose

Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing

Port Status: S -- Selected, U -- Unselected, I -- Individual

Port: A -- Auto port, M -- Management port, R -- Reference port

Flags:  A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,

        D -- Synchronization, E -- Collecting, F -- Distributing,

        G -- Defaulted, H -- Expired

 

Aggregate Interface: Bridge-Aggregation101

Creation Mode: Manual

Aggregation Mode: Dynamic

Loadsharing Type: Shar

Management VLANs: None

System ID: 0x8000, 8e33-9400-0400

Local:

  Port                Status   Priority Index    Oper-Key               Flag

  GE1/0/1             S        32768    1        1                      {ACDEF}

  GE1/0/2             S        32768    2        1                      {ACDEF}

Remote:

  Actor               Priority Index    Oper-Key SystemID               Flag

  GE1/0/1(R)          32768    16387    40002    0x7b  , 0001-0001-0001 {ACDEF}

  GE1/0/2             32768    32771    40002    0x7b  , 0001-0001-0001 {ACDEF}

# Display VRRP group information on Device A and Device B. Device A is the master device in VRRP group 1, and Device B is the master device in VRRP group 2, ensuring that hosts in area A communicate externally through Device A and hosts in area B communicate externally through Device B.

[DeviceA] display vrrp

IPv4 Virtual Router Information:

 Running mode : Standard

 Total number of virtual routers : 2

 Interface          VRID  State        Running Adver   Auth     Virtual

                                       Pri     Timer   Type        IP

 ---------------------------------------------------------------------

 Vlan100            1     Master       200     100     None     100.1.1.100

 Vlan101            2     Backup       100     100     None     101.1.1.100

[DeviceB] display vrrp

IPv4 Virtual Router Information:

 Running mode : Standard

 Total number of virtual routers : 2

 Interface          VRID  State        Running Adver   Auth     Virtual

                                       Pri     Timer   Type        IP

 ---------------------------------------------------------------------

 Vlan100            1     Backup       100     100     None     100.1.1.100

 Vlan101            2     Master       200     100     None     101.1.1.100

# Display the OSPF neighbor information of Device E. The output shows that Device E has established neighbors with Device A and Device B to ensure Layer 3 connectivity.

[DeviceE] display ospf peer

 

         OSPF Process 1 with Router ID 30.1.1.1

               Neighbor Brief Information

 

 Area: 0.0.0.0

 Router ID       Address         Pri Dead-Time  State             Interface

 101.1.1.1       10.1.1.1        1   34         Full/DR           Vlan10

 101.1.1.2       20.1.1.1        1   36         Full/DR           Vlan20

# Use the ping command on a host in area A to verify that it can successfully ping a host in area B (the host runs Windows XP). This shows that hosts in both area A and area B can ping each other. Verify that a host in area A can successfully ping 30.1.1.1. The preceding information indicates that Layer 3 forwarding is achieved through M-LAG.

C:\Documents and Settings\Administrator>ping 101.1.1.4

 

Pinging 101.1.1.4 with 32 bytes of data:

 

Reply from 101.1.1.4: bytes=32 time=1ms TTL=126

Reply from 101.1.1.4: bytes=32 time=1ms TTL=126

Reply from 101.1.1.4: bytes=32 time=1ms TTL=126

Reply from 101.1.1.4: bytes=32 time=1ms TTL=126

 

Ping statistics for 101.1.1.4:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 1ms, Maximum = 1ms, Average = 1ms

 

C:\Documents and Settings\Administrator>ping 30.1.1.1

 

Pinging 30.1.1.1 with 32 bytes of data:

 

Reply from 30.1.1.1: bytes=32 time=1ms TTL=126

Reply from 30.1.1.1: bytes=32 time=1ms TTL=126

Reply from 30.1.1.1: bytes=32 time=1ms TTL=126

Reply from 30.1.1.1: bytes=32 time=1ms TTL=126

 

Ping statistics for 30.1.1.1:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 1ms, Maximum = 1ms, Average = 1ms

Configuration files

·     Device A:

#

ospf 1

 area 0.0.0.0

  network 10.1.1.0 0.0.0.255

  network 100.1.1.0 0.0.0.255

  network 101.1.1.0 0.0.0.255

#

vlan 10

#

vlan 100 to 101

#

interface Bridge-Aggregation100

 port link-type trunk

 port trunk permit vlan 1 100

 link-aggregation mode dynamic

 port m-lag group 1

#

interface Bridge-Aggregation101

 port link-type trunk

 port trunk permit vlan 1 101

 link-aggregation mode dynamic

 port m-lag group 2

#

interface Bridge-Aggregation125

 port link-type trunk

 port trunk permit vlan all

 link-aggregation mode dynamic

 port m-lag peer-link 1

#

interface Vlan-interface10

 ip address 10.1.1.1 255.255.255.0

#

interface Vlan-interface100

 ip address 100.1.1.1 255.255.255.0

 vrrp vrid 1 virtual-ip 100.1.1.100

 vrrp vrid 1 priority 200

 vrrp vrid 1 preempt-mode delay 500

 vrrp vrid 1 track 1 priority reduced 150

#

interface Vlan-interface101

 ip address 101.1.1.1 255.255.255.0

 vrrp vrid 2 virtual-ip 101.1.1.100

#

interface GigabitEthernet1/0/5

 port link-mode route

 ip address 1.1.1.1 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

 port link-aggregation group 100

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 101

 port link-aggregation group 101

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 125

#

interface GigabitEthernet1/0/4

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 125

#

interface GigabitEthernet1/0/6

 port link-mode bridge

 port access vlan 10

#

 m-lag system-mac 0001-0001-0001

 m-lag system-number 1

 m-lag system-priority 123

 m-lag keepalive ip destination 1.1.1.2 source 1.1.1.1

#

 m-lag mad exclude interface GigabitEthernet1/0/5

#

 track 1 interface GigabitEthernet1/0/6

#

·     Device B:

#

ospf 1

 area 0.0.0.0

  network 20.1.1.0 0.0.0.255

  network 100.1.1.0 0.0.0.255

  network 101.1.1.0 0.0.0.255

#

vlan 20

#

vlan 100 to 101

#

interface Bridge-Aggregation100

 port link-type trunk

 port trunk permit vlan 1 100

 link-aggregation mode dynamic

 port m-lag group 1

#

interface Bridge-Aggregation101

 port link-type trunk

 port trunk permit vlan 1 101

 link-aggregation mode dynamic

 port m-lag group 2

#

interface Bridge-Aggregation125

 port link-type trunk

 port trunk permit vlan all

 link-aggregation mode dynamic

 port m-lag peer-link 1

#

interface Vlan-interface20

 ip address 20.1.1.1 255.255.255.0

#

interface Vlan-interface100

 ip address 100.1.1.2 255.255.255.0

 vrrp vrid 1 virtual-ip 100.1.1.100

#

interface Vlan-interface101

 ip address 101.1.1.2 255.255.255.0

 vrrp vrid 2 virtual-ip 101.1.1.100

 vrrp vrid 2 priority 200

 vrrp vrid 2 preempt-mode delay 500

 vrrp vrid 2 track 2 priority reduced 150

#

interface GigabitEthernet1/0/5

 port link-mode route

 ip address 1.1.1.2 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 101

 port link-aggregation group 101

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

 port link-aggregation group 100

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 125

#

interface GigabitEthernet1/0/4

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 125

#

interface GigabitEthernet1/0/6

 port link-mode bridge

 port access vlan 20

#

 m-lag system-mac 0001-0001-0001

 m-lag system-number 2

 m-lag system-priority 123

 m-lag keepalive ip destination 1.1.1.1 source 1.1.1.2

#

 m-lag mad exclude interface GigabitEthernet1/0/5

#

 track 2 interface GigabitEthernet1/0/6

#

·     Device C:

#

vlan 100

#

interface Bridge-Aggregation100

 port link-type trunk

 port trunk permit vlan 1 100

 link-aggregation mode dynamic

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

 port link-aggregation group 100

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

 port link-aggregation group 100

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port access vlan 100

#

·     Device D:

#

vlan 101

#

interface Bridge-Aggregation101

 port link-type trunk

 port trunk permit vlan 1 101

 link-aggregation mode dynamic

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 101

 port link-aggregation group 101

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 101

 port link-aggregation group 101

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port access vlan 101

#

·     Device E:

#

ospf 1

 area 0.0.0.0

  network 10.1.1.0 0.0.0.255

  network 20.1.1.0 0.0.0.255

  network 30.1.1.0 0.0.0.255

#

vlan 10

#

vlan 20

#

vlan 30

#

interface Vlan-interface10

 ip address 10.1.1.2 255.255.255.0

#

interface Vlan-interface20

 ip address 20.1.1.2 255.255.255.0

#

interface Vlan-interface30

 ip address 30.1.1.1 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port access vlan 10

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port access vlan 20

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port access vlan 30

#

Example: Configuring IPv4 and IPv6 dual-active VLAN gateways on an M-LAG network

Network configuration

As shown in Figure 3:

·     Device A and Device B form an M-LAG system. Device D accesses the M-LAG system through M-LAG interfaces.

·     Device A and Device B are connected to uplink device Device C through equal-cost routes.

Configure the network as follows to meet the server access requirements of users:

·     The two M-LAG member devices Device A and Device B both act as the IPv4 gateway and IPv6 gateway for the servers.

·     If the link between Device A or Device B and uplink device Device C fails, packets can be transmitted along the other M-LAG member device to Device C to avoid interrupting the servers’ communication with the external network.

Figure 3 Network diagram

 

 

Analysis

·     Configure VLAN-interface 100 on Device A and Device B to act as the IPv4 and IPv6 dual-active gateways. To enable IPv4 and IPv6 users to access the external network through the gateways, configure the same IPv4 address, MAC address, IPv6 address, and IPv6 link-local address for VLAN-interface 100 on Device A and Device B.

·     Enable Device A and Device B to communicate at Layer 3 through VLAN-interface 101. Then, packets can be routed to the other M-LAG member device when the link between Device A or Device B and uplink device Device C fails.

Applicable hardware and software versions

The following matrix shows the hardware and software versions to which this configuration example is applicable:

 

 

Restrictions and guidelines

The M-LAG system MAC address must be the same for devices in the same M-LAG system. The M-LAG system MAC addresses must be different for devices in different M-LAG systems.

For the S5570S-EI, S5500V3-SI, S3600V3-EI, and S3600V3-SI switch series, before switching a Layer 2 Ethernet interface to a Layer 3 Ethernet interface or creating a Layer 3 aggregate interface, use the reserve-vlan-interface command to reserve local VLAN interface resources. For more information about the reserve-vlan-interface command, see the VLAN configuration and VLAN commands for your product.

Procedures

Configuring Device A

# Configure the M-LAG system parameters.

<DeviceA> system-view

[DeviceA] m-lag system-mac 0002-0002-0002

[DeviceA] m-lag system-number 1

[DeviceA] m-lag system-priority 123

# Configure the destination and source IP addresses of keepalive packets.

[DeviceA] m-lag keepalive ip destination 21.1.1.2 source 21.1.1.1

# Set the link mode of GigabitEthernet 1/0/5 to Layer 3, and assign the interface an IP address. The IP address will be used as the source IP address of keepalive packets.

[DeviceA] interface gigabitethernet 1/0/5

[DeviceA-GigabitEthernet1/0/5] port link-mode route

[DeviceA-GigabitEthernet1/0/5] ip address 21.1.1.1 255.255.255.0

[DeviceA-GigabitEthernet1/0/5] ipv6 address 21::1 64

[DeviceA-GigabitEthernet1/0/5] quit

# Exclude the interface for the keepalive link from the shutdown action by M-LAG MAD.

[DeviceA] m-lag mad exclude interface gigabitethernet 1/0/5

# Create dynamic Layer 2 aggregate interface Bridge-aggregation 1.

[DeviceA] interface bridge-aggregation 1

[DeviceA-Bridge-Aggregation1] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation1] quit

# Assign GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 to aggregation group 1.

[DeviceA] interface gigabitethernet 1/0/3

[DeviceA-GigabitEthernet1/0/3] port link-aggregation group 1

[DeviceA-GigabitEthernet1/0/3] quit

[DeviceA] interface gigabitethernet 1/0/4

[DeviceA-GigabitEthernet1/0/4] port link-aggregation group 1

[DeviceA-GigabitEthernet1/0/4] quit

# Configure Layer 2 aggregate interface Bridge-Aggregation 1 as the peer link interface.

[DeviceA] interface bridge-aggregation 1

[DeviceA-Bridge-Aggregation1] port m-lag peer-link 1

[DeviceA-Bridge-Aggregation1] undo port trunk permit vlan 1

[DeviceA-Bridge-Aggregation1] quit

# Create dynamic Layer 1 dynamic aggregate interface Bridge-Aggregation 3, and configure it as M-LAG interface 2.

[DeviceA] interface bridge-aggregation 3

[DeviceA-Bridge-Aggregation3] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation3] port m-lag group 1

[DeviceA-Bridge-Aggregation3] quit

# Assign GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to aggregation group 3.

[DeviceA] interface gigabitethernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] port link-aggregation group 3

[DeviceA-GigabitEthernet1/0/1] quit

[DeviceA] interface gigabitethernet 1/0/2

[DeviceA-GigabitEthernet1/0/2] port link-aggregation group 3

[DeviceA-GigabitEthernet1/0/2] quit

# Create VLAN 100 and VLAN 101.

[DeviceA] vlan 100

[DeviceA-vlan100] quit

[DeviceA] vlan 101

[DeviceA-vlan101] quit

# Set the link type of Bridge-Aggregation 3 to trunk, and assign it to VLAN 100.

[DeviceA] interface bridge-aggregation 3

[DeviceA-Bridge-Aggregation3] port link-type trunk

[DeviceA-Bridge-Aggregation3] port trunk permit vlan 100

[DeviceA-Bridge-Aggregation3] undo port trunk permit vlan 1

[DeviceA-Bridge-Aggregation3] quit

# Assign IPv4 address 100.1.1.100 and MAC address 0000-0010-0010 to VLAN-interface 100, which is to act as an IPv4 dual-active gateway.

[DeviceA] interface vlan-interface 100

[DeviceA-Vlan-interface100] ip address 100.1.1.100 255.255.255.0

[DeviceA-Vlan-interface100] mac-address 0000-0010-0010

# Assign IPv6 link-local address 100::100 and MAC address FE80:: 80 to VLAN-interface 100, which is to act as an IPv6 dual-active gateway.

[DeviceA] interface vlan-interface 100

[DeviceA-Vlan-interface100] ipv6 address 100::100 64

[DeviceA-Vlan-interface100] ipv6 address FE80::80 link-local

# Exclude VLAN-interface 100 from the shutdown action by M-LAG MAD.

[DeviceA] m-lag mad exclude interface vlan-interface100

# Create VLAN-interface 101, and assign an IPv4 address and IPv6 address to it, which is used for Layer 3 communication between M-LAG member devices.

[DeviceA] interface vlan-interface 101

[DeviceA-Vlan-interface101] ip address 101.1.1.1 255.255.255.0

[DeviceA-Vlan-interface101] ipv6 address 101::1 64

[DeviceA-Vlan-interface101] quit

# Exclude VLAN-interface 101 from the shutdown action by M-LAG MAD.

[DeviceA] m-lag mad exclude interface vlan-interface101

# Set the router ID to 3.3.3.3.

[DeviceA] router id 3.3.3.3

# Configure OSPF on VLAN-interface 100 and VLAN-interface 101. Disable VLAN-interface 100 from receiving and sending OSPF packets to implement IPv4 connectivity between the M-LAG member devices.

[DeviceA] ospf 1

[DeviceA-ospf-1] silent-interface vlan-interface 100

[DeviceA-ospf-1] import-route direct

[DeviceA-ospf-1] area 0

[DeviceA-ospf-1-area-0.0.0.0] quit

[DeviceA-ospf-1] quit

[DeviceA] interface vlan-interface 100

[DeviceA-Vlan-interface100] ospf 1 area 0.0.0.0

[DeviceA-Vlan-interface100] quit

[DeviceA] interface vlan-interface 101

[DeviceA-Vlan-interface101] ospf 1 area 0.0.0.0

[DeviceA-Vlan-interface101] quit

# Configure OSPFv3 on VLAN-interface 100 and VLAN-interface 101. Disable VLAN-interface 100 from receiving and sending OSPFv3 packets to implement IPv6 connectivity between the M-LAG member devices.

[DeviceA] ospfv3 1

[DeviceA-ospfv3-1] silent-interface vlan-interface 100

[DeviceA-ospfv3-1] import-route direct

[DeviceA-ospfv3-1] area 0

[DeviceA-ospfv3-1-area-0.0.0.0] quit

[DeviceA-ospfv3-1] quit

[DeviceA] interface vlan-interface 100

[DeviceA-Vlan-interface100] ospfv3 1 area 0.0.0.0

[DeviceA-Vlan-interface100] quit

[DeviceA] interface vlan-interface 101

[DeviceA-Vlan-interface101] ospfv3 1 area 0.0.0.0

[DeviceA-Vlan-interface101] quit

# Create VLAN 32, and assign the M-LAG uplink interface GigabitEthernet 1/0/6 to VLAN 32.

[DeviceA] vlan 32

[DeviceA-vlan32] quit

[DeviceA] interface gigabitethernet 1/0/6

[DeviceA-GigabitEthernet1/0/6] port link-type trunk

[DeviceA-GigabitEthernet1/0/6] port trunk permit vlan 32

[DeviceA-GigabitEthernet1/0/6] undo port trunk permit vlan 1

[DeviceA-GigabitEthernet1/0/6] quit

Create VLAN-interface 32, assign an IPv4 address and IPv6 address to it, and enable OSPF and OSPFv3 on the interface.

[DeviceA] interface vlan-interface 32

[DeviceA-Vlan-interface32] ip address 32.1.1.1 255.255.255.0

[DeviceA-Vlan-interface32] ipv6 address 32::1 64

[DeviceA-Vlan-interface32] ospf 1 area 0

[DeviceA-Vlan-interface32] ospfv3 1 area 0

[DeviceA-Vlan-interface32] quit

Configuring Device B

# Configure the M-LAG system parameters.

<DeviceB> system-view

[DeviceB] m-lag system-mac 0002-0002-0002

[DeviceB] m-lag system-number 2

[DeviceB] m-lag system-priority 123

# Configure the destination and source IP addresses of keepalive packets.

[DeviceB] m-lag keepalive ip destination 21.1.1.1 source 21.1.1.2

# Set the link mode of GigabitEthernet 1/0/5 to Layer 3, and assign the interface an IP address. The IP address will be used as the source IP address of keepalive packets.

[DeviceB] interface gigabitethernet 1/0/5

[DeviceB-GigabitEthernet1/0/5] port link-mode route

[DeviceB-GigabitEthernet1/0/5] ip address 21.1.1.2 255.255.255.0

[DeviceB-GigabitEthernet1/0/5] ipv6 address 21::2 64

[DeviceB-GigabitEthernet1/0/5] quit

# Exclude the interface used for M-LAG keepalive detection from the shutdown action by MAD.

[DeviceB] m-lag mad exclude interface gigabitethernet 1/0/5

# Create dynamic Layer 2 aggregate interface Bridge-aggregation 1.

[DeviceB] interface bridge-aggregation 1

[DeviceB-Bridge-Aggregation1] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation1] quit

# Assign GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 to aggregation group 1.

[DeviceB] interface gigabitethernet 1/0/3

[DeviceB-GigabitEthernet1/0/3] port link-aggregation group 1

[DeviceB-GigabitEthernet1/0/3] quit

[DeviceB] interface gigabitethernet 1/0/4

[DeviceB-GigabitEthernet1/0/4] port link-aggregation group 1

[DeviceB-GigabitEthernet1/0/4] quit

# Configure Layer 2 aggregate interface Bridge-Aggregation 1 as the peer link interface.

[DeviceB] interface bridge-aggregation 1

[DeviceB-Bridge-Aggregation1] port m-lag peer-link 1

[DeviceB-Bridge-Aggregation1] undo port trunk permit vlan 1

[DeviceB-Bridge-Aggregation1] quit

# Create dynamic Layer 1 dynamic aggregate interface Bridge-Aggregation 3, and configure it as M-LAG interface 2.

[DeviceB] interface bridge-aggregation 3

[DeviceB-Bridge-Aggregation3] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation3] port m-lag group 1

[DeviceB-Bridge-Aggregation3] quit

# Assign GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to aggregation group 3.

[DeviceB] interface gigabitethernet 1/0/1

[DeviceB-GigabitEthernet1/0/1] port link-aggregation group 3

[DeviceB-GigabitEthernet1/0/1] quit

[DeviceB] interface gigabitethernet 1/0/2

[DeviceB-GigabitEthernet1/0/2] port link-aggregation group 3

[DeviceB-GigabitEthernet1/0/2] quit

# Create VLANs 100 and 101.

[DeviceB] vlan 100

[DeviceB-vlan100] quit

[DeviceB] vlan 101

[DeviceB-vlan101] quit

# Set the link type of Bridge-Aggregation 3 to trunk, and assign it to VLAN 100.

[DeviceB] interface bridge-aggregation 3

[DeviceB-Bridge-Aggregation3] port link-type trunk

[DeviceB-Bridge-Aggregation3] port trunk permit vlan 100

[DeviceB-Bridge-Aggregation3] undo port trunk permit vlan 1

[DeviceB-Bridge-Aggregation3] quit

# Assign IPv4 address 100.1.1.100 and MAC address 0000-0010-0010 to VLAN-interface 100, which is to act as an IPv4 dual-active gateway.

[DeviceB] interface vlan-interface 100

[DeviceB-Vlan-interface100] ip address 100.1.1.100 255.255.255.0

[DeviceB-Vlan-interface100] mac-address 0000-0010-0010

# Assign IPv6 link-local address 100::100 and MAC address FE80:: 80 to VLAN-interface 100, which is to act as an IPv6 dual-active gateway.

[DeviceB] interface vlan-interface 100

[DeviceB-Vlan-interface100] ipv6 address 100::100 64

[DeviceB-Vlan-interface100] ipv6 address FE80::80 link-local

# Exclude VLAN-interface 100 from the shutdown action by M-LAG MAD.

[DeviceB] m-lag mad exclude interface vlan-interface100

# Create VLAN-interface 101, and assign an IPv4 address and IPv6 address to it, which is used for Layer 3 communication between M-LAG member devices.

[DeviceB] interface vlan-interface 101

[DeviceB-vlan-interface101] ip address 101.1.1.2 24

[DeviceB-vlan-interface101] ipv6 address 101::2 64

[DeviceB-vlan-interface101] quit

# Exclude VLAN-interface 101 from the shutdown action by M-LAG MAD.

[DeviceB] m-lag mad exclude interface vlan-interface101

# Set the router ID to 4.4.4.4.

[DeviceB] router id 4.4.4.4

# Configure OSPF on VLAN-interface 100 and VLAN-interface 101. Disable VLAN-interface 100 from receiving and sending OSPF packets to implement IPv4 connectivity between the M-LAG member devices.

[DeviceB] ospf 1

[DeviceB-ospf-1] silent-interface vlan-interface100

[DeviceB-ospf-1] import-route direct

[DeviceB-ospf-1] area 0

[DeviceB-ospf-1-area-0.0.0.0] quit

[DeviceB-ospf-1] quit

[DeviceB] interface vlan-interface 100

[DeviceB-Vlan-interface100] ospf 1 area 0.0.0.0

[DeviceB-Vlan-interface100] quit

[DeviceB] interface vlan-interface 101

[DeviceB-Vlan-interface101] ospf 1 area 0.0.0.0

[DeviceB-Vlan-interface101] quit

# Configure OSPFv3 on VLAN-interface 100 and VLAN-interface 101. Disable VLAN-interface 100 from receiving and sending OSPFv3 packets to implement IPv6 connectivity between the M-LAG member devices.

[DeviceB] ospfv3 1

[DeviceB-ospf-1] silent-interface vlan-interface100

[DeviceB-ospfv3-1] import-route direct

[DeviceB-ospfv3-1] area 0

[DeviceB-ospfv3-1-area-0.0.0.0] quit

[DeviceB-ospfv3-1] quit

[DeviceB] interface vlan-interface 100

[DeviceB-vlan-interface100] ospfv3 1 area 0

[DeviceB-vlan-interface100] quit

[DeviceB] interface vlan-interface 101

[DeviceB-vlan-interface101] ospfv3 1 area 0

[DeviceB-vlan-interface101] quit

# Create VLAN 33, and assign the M-LAG uplink interface GigabitEthernet 1/0/6 to VLAN 33.

[DeviceB] vlan 33

[DeviceB-vlan33] quit

[DeviceB] interface gigabitethernet 1/0/6

[DeviceB-GigabitEthernet1/0/6] port link-type trunk

[DeviceB-GigabitEthernet1/0/6] port trunk permit vlan 33

[DeviceB-GigabitEthernet1/0/6] undo port trunk permit vlan 1

[DeviceB-GigabitEthernet1/0/6] quit

# Create VLAN-interface 33, assign an IPv4 address and IPv6 address to it, and enable OSPF and OSPFv3 on the interface.

[DeviceB] interface vlan-interface 33

[DeviceB-Vlan-interface33] ip address 33.1.1.1 255.255.255.0

[DeviceB-Vlan-interface33] ipv6 address 33::1 64

[DeviceB-Vlan-interface33] ospf 1 area 0

[DeviceB-Vlan-interface33] ospfv3 1 area 0

[DeviceB-Vlan-interface33] quit

Configuring Device C

# Create VLAN 32. Assign GigabitEthernet 1/0/1 that connects Device C to Device A to VLAN 32. Assign both an IPv4 address and IPv6 address to VLAN-interface 32.

<DeviceC> system-view

[DeviceC] vlan 32

[DeviceC-vlan32] quit

[DeviceC] interface gigabitethernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] port link-type trunk

[DeviceC-GigabitEthernet1/0/1] port trunk permit vlan 32

[DeviceC-GigabitEthernet1/0/1] undo port trunk permit vlan 1

[DeviceC-GigabitEthernet1/0/] quit

[DeviceC] interface vlan-interface 32

[DeviceC-Vlan-interface32] ip address 32.1.1.2 24

[DeviceC-Vlan-interface32] ipv6 address 32::2 64

[DeviceC-Vlan-interface32] quit

# Create VLAN 33. Assign GigabitEthernet 1/0/2 that connects Device C to Device B to VLAN 33. Assign both an IPv4 address and IPv6 address to VLAN-interface 33.

[DeviceC] vlan 33

[DeviceC-vlan33] quit

[DeviceC] interface gigabitethernet 1/0/2

[DeviceC-GigabitEthernet1/0/2] port link-type trunk

[DeviceC-GigabitEthernet1/0/2] port trunk permit vlan 33

[DeviceC-GigabitEthernet1/0/2] undo port trunk permit vlan 1

[DeviceC-GigabitEthernet1/0/2] quit

[DeviceC] interface vlan-interface 33

[DeviceC-Vlan-interface33] ip address 33.1.1.2 24

[DeviceC-Vlan-interface33] ipv6 address 33::2 64

[DeviceC-Vlan-interface33] quit

# Set the router ID to 5.5.5.5.

[DeviceC] router id 5.5.5.5

# Enable OSPF on VLAN-interface 32 and VLAN-interface 33.

[DeviceC] ospf 1

[DeviceC-ospf-1] import-route direct

[DeviceC-ospf-1] area 0

[DeviceC-ospf-1-area-0.0.0.0] quit

[DeviceC-ospf-1] quit

[DeviceC] interface vlan-interface 32

[DeviceC-Vlan-interface32] ospf 1 area 0

[DeviceC-Vlan-interface32] quit

[DeviceC] interface vlan-interface 33

[DeviceC-Vlan-interface33] ospf 1 area 0

[DeviceC-Vlan-interface33] quit

# Enable OSPFv3 on VLAN-interface 32 and VLAN-interface 33.

[DeviceC] ospfv3 1

[DeviceC-ospfv3-1] import-route direct

[DeviceC-ospfv3-1] area 0

[DeviceC-ospfv3-1-area-0.0.0.0] quit

[DeviceC-ospfv3-1] quit

[DeviceC] interface vlan-interface 32

[DeviceC-Vlan-interface32] ospfv3 1 area 0

[DeviceC-Vlan-interface32] quit

[DeviceC] interface vlan-interface 33

[DeviceC-Vlan-interface32] ospfv3 1 area 0

[DeviceC-Vlan-interface33] quit

# Create VLAN 22. Assign GigabitEthernet 1/0/3 that connects to Network1 to VLAN 22. Assign both an IPv4 address and IPv6 address to VLAN-interface 22.

[DeviceC] vlan 22

[DeviceC-vlan22] quit

[DeviceC] interface gigabitethernet 1/0/3

[DeviceC-GigabitEthernet1/0/3] port link-type trunk

[DeviceC-GigabitEthernet1/0/3] port trunk permit vlan 22

[DeviceC-GigabitEthernet1/0/3] undo port trunk permit vlan 1

[DeviceC-GigabitEthernet1/0/3] quit

[DeviceC] interface vlan-interface 22

[DeviceC-Vlan-interface22] ip address 22.1.1.1 24

[DeviceC-Vlan-interface22] ipv6 address 22::1 64

[DeviceC-Vlan-interface22] quit

Configuring Device D

# Create Layer 2 aggregate interface Bridge-Aggregation 3 and configure the interface to operate in dynamic mode.

<DeviceD> system-view

[DeviceD] interface bridge-aggregation 3

[DeviceD-Bridge-Aggregation3] link-aggregation mode dynamic

[DeviceD-Bridge-Aggregation3] quit

# Assign interfaces HundredGigE 1/0/1 through HundredGigE 1/0/4 to aggregation group 3.

[DeviceD] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/4

[DeviceD-if-range] port link-aggregation group 3

[DeviceD-if-range] quit

# Create VLAN 100.

[DeviceD] vlan 100

[DeviceD-vlan100] quit

# Set the link type of Bridge-Aggregation 3 to trunk, and assign it to VLAN 100.

[DeviceD] interface bridge-aggregation 3

[DeviceD-Bridge-Aggregation3] port link-type trunk

[DeviceD-Bridge-Aggregation3] port trunk permit vlan 100

[DeviceD-Bridge-Aggregation3] undo port trunk permit vlan 1

[DeviceD-Bridge-Aggregation3] quit

Verifying the configuration

Verifying the status of the M-LAG system

 Verify that the peer-link interface and M-LAG interfaces are working correctly on Device A and Device B. Use Device A as an example.

# Display summary information about the IPP and M-LAG interface.

[DeviceA] display m-lag summary

Flags: A -- Aggregate interface down, B -- No peer M-LAG interface configured

       C -- Configuration consistency check failed

 

Peer-link interface: BAGG1

Peer-link interface state (cause): UP

Keepalive link state (cause): UP

 

                     M-LAG interface information

M-LAG IF    M-LAG group  Local state (cause)  Peer state  Remaining down time(s)

BAGG3       1            UP                   UP          -

# Verify that keepalive link is working correctly.

[DeviceA] display m-lag keepalive

Neighbor keepalive link status: Up

Neighbor is alive for: 64765 s 28 ms

Keepalive packet transmission status:

  Sent: Successful

  Received: Successful

Last received keepalive packet information:

  Source IP address: 21.1.1.2

  Time: 2021/01/17 17:10:52

  Action: Accept

 

M-LAG keepalive parameters:

Destination IP address: 21.1.1.2

Source IP address: 21.1.1.1

Keepalive UDP port : 6400

Keepalive VPN name : N/A

Keepalive interval : 1000 ms

Keepalive timeout  : 5 sec

Keepalive hold time: 3 sec

# Display the M-LAG system settings.

<Sysname> display m-lag system

                     System information

Local system number: 1                      Peer system number: 2

Local system MAC: 0002-0002-0002            Peer system MAC: 0002-0002-0002

Local system priority: 123                  Peer system priority: 123

Local bridge MAC: 3cd4-3ce1-0200            Peer bridge MAC: 3cd4-437d-0300

Local effective role: Primary               Peer effective role: Secondary

Health level: 0

Standalone mode on split: Disabled

In standalone mode: No

 

                     System timer information

Timer                      State       Value (s)    Remaining time (s)

Auto recovery              Disabled    -            -

Restore delay              Disabled    30           -

Consistency-check delay    Disabled    15           -

Standalone delay           Disabled    -            -

Role to None delay         Disabled    60           -

# Display detailed information about the IPP and M-LAG interfaces.

[DeviceA] display m-lag verbose

Flags: A -- Home_Gateway, B -- Neighbor_Gateway, C -- Other_Gateway,

       D -- PeerLink_Activity, E -- DRCP_Timeout, F -- Gateway_Sync,

       G -- Port_Sync, H -- Expired

 

Peer-link interface/Peer-link interface ID: BAGG1/1

State: UP

Cause: -

Local DRCP flags/Peer DRCP flags: ABDFG/ABDFG

Local Selected ports (index): GE1/0/3 (27), GE1/0/4 (32)

Peer Selected ports indexes: 125, 130

 

M-LAG interface/M-LAG group ID: BAGG3/1

Local M-LAG interface state: UP

Peer M-LAG interface state: UP

M-LAG group state: UP

Local M-LAG interface down cause: -

Remaining M-LAG DOWN time: -

Local M-LAG interface LACP MAC: Config=N/A, Effective=0002-0002-0002

Peer M-LAG interface LACP MAC: Config=N/A, Effective=0002-0002-0002

Local M-LAG interface LACP priority: Config=32768, Effective=123

Peer M-LAG interface LACP priority: Config=32768, Effective=123

Local DRCP flags/Peer DRCP flags: ABDFG/ABDFG

Local Selected ports (index): GE1/0/1 (12), GE1/0/2 (13)

Peer Selected ports indexes: 56, 57

Verifying the routing protocols

# Display the OSPF neighbors of Device A.

[DeviceA] display ospf peer

 

         OSPF Process 1 with Router ID 3.3.3.3

               Neighbor Brief Information

 

 Area: 0.0.0.0

 Router ID       Address         Pri Dead-Time  State             Interface

 4.4.4.4         101.1.1.2       1   36         Full/DR           Vlan101

 5.5.5.5         32.1.1.2        1   38         Full/DR           Vlan32

# Display the OSPFv3 neighbors of Device A.

[DeviceA] display ospfv3 peer

 

               OSPFv3 Process 1 with Router ID 3.3.3.3

 

 Area: 0.0.0.0

-------------------------------------------------------------------------

 Router ID       Pri State             Dead-Time InstID Interface

 4.4.4.4         1   Full/DR           00:00:36  0      Vlan101

 5.5.5.5         1   Full/DR           00:00:35  0      Vlan32

# Display the OSPF neighbors of Device B.

[DeviceB] display ospf peer

 

         OSPF Process 1 with Router ID 4.4.4.4

               Neighbor Brief Information

 

 Area: 0.0.0.0

 Router ID       Address         Pri Dead-Time  State             Interface

 3.3.3.3         101.1.1.1       1   32         Full/BDR          Vlan101

 5.5.5.5         33.1.1.2        1   33         Full/DR           Vlan33

# Display the OSPFv3 neighbors of Device B.

[DeviceB] display ospfv3 peer

 

               OSPFv3 Process 1 with Router ID 4.4.4.4

 

 Area: 0.0.0.0

-------------------------------------------------------------------------

 Router ID       Pri State             Dead-Time InstID Interface

 3.3.3.3         1   Full/BDR          00:00:35  0      Vlan101

 5.5.5.5         1   Full/DR           00:00:38  0      Vlan33

# Display the OSPF neighbors of Device C.

[DeviceC] display ospf peer

 

         OSPF Process 1 with Router ID 5.5.5.5

               Neighbor Brief Information

 

 Area: 0.0.0.0

 Router ID       Address         Pri Dead-Time  State             Interface

 3.3.3.3         32.1.1.1        1   32         Full/DR           Vlan32

 4.4.4.4         33.1.1.1        1   38         Full/DR           Vlan33

# Display the OSPFv3 neighbors of Device C.

[DeviceC] display ospfv3 peer

 

               OSPFv3 Process 1 with Router ID 5.5.5.5

 

 Area: 0.0.0.0

-------------------------------------------------------------------------

 Router ID       Pri State             Dead-Time InstID Interface

 3.3.3.3         1   Full/DR           00:00:37  0      Vlan32

 4.4.4.4         1   Full/DR           00:00:34  0      Vlan33

Verifying that Server 1 and Server 2 can communicate with Network 1

Server 1 and Server 2 can communicate with Network 1 through both IPv4 and IPv6 addresses.

Verifying that Server 1 and Server 2 can still communicate with Network 1 when the uplink interface of Device A or Device B fails

Disconnect the interface connecting Device A to Device C. Server 1 and Server 2 can still communicate with Network 1 (transient packet loss occurs during the traffic switchover process).

Configuration files

·     Device A:

#

 router id 3.3.3.3

#

ospf 1

 import-route direct

 silent-interface Vlan-interface100

 area 0.0.0.0

#

ospfv3 1

 import-route direct

 silent-interface Vlan-interface100

 area 0.0.0.0

#

vlan 1

#

vlan 32

#

vlan 100 to 101

#

interface Bridge-Aggregation1

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 2 to 4094

 link-aggregation mode dynamic

 port m-lag peer-link 1

#

interface Bridge-Aggregation3

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 link-aggregation mode dynamic

 port m-lag group 1

#

interface Vlan-interface32

 ip address 32.1.1.1 255.255.255.0

 ospf 1 area 0.0.0.0

 ospfv3 1 area 0.0.0.0

 ipv6 address 32::1/64

#

interface Vlan-interface100

 ip address 100.1.1.100 255.255.255.0

 ospf 1 area 0.0.0.0

 ospfv3 1 area 0.0.0.0

 mac-address 0000-0010-0010

 ipv6 address FE80::80 link-local

 ipv6 address 100::100/64

#

interface Vlan-interface101

 ip address 101.1.1.1 255.255.255.0

 ospf 1 area 0.0.0.0

 ospfv3 1 area 0.0.0.0

 ipv6 address 101::1/64

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 combo enable fiber

 port link-aggregation group 3

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 combo enable fiber

 port link-aggregation group 3

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 2 to 4094

 port link-aggregation group 1

#

interface GigabitEthernet1/0/4

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 2 to 4094

 port link-aggregation group 1

#

interface GigabitEthernet1/0/5

 port link-mode route

 ip address 21.1.1.1 255.255.255.0

 ipv6 address 21::1/64

#

interface GigabitEthernet1/0/6

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 32

#

 m-lag system-mac 0002-0002-0002

 m-lag system-number 1

 m-lag system-priority 123

 m-lag keepalive ip destination 21.1.1.2 source 21.1.1.1

 m-lag mad exclude interface GigabitEthernet1/0/5

 m-lag mad exclude interface Vlan-interface100

 m-lag mad exclude interface Vlan-interface101

#

·     Device B:

#

 router id 4.4.4.4

#

ospf 1

 import-route direct

 silent-interface Vlan-interface100

 area 0.0.0.0

#

ospfv3 1

 import-route direct

 silent-interface Vlan-interface100

 area 0.0.0.0

#

vlan 1

#

vlan 33

#

vlan 100 to 101

#

interface Bridge-Aggregation1

 port link-type trunk

 port trunk permit vlan all

 link-aggregation mode dynamic

 port m-lag peer-link 1

#

interface Bridge-Aggregation3

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 link-aggregation mode dynamic

 port m-lag group 1

#

interface Vlan-interface33

 ip address 33.1.1.1 255.255.255.0

 ospf 1 area 0.0.0.0

 ospfv3 1 area 0.0.0.0

 ipv6 address 33::1/64

#

interface Vlan-interface100

 ip address 100.1.1.100 255.255.255.0

 ospf 1 area 0.0.0.0

 ospfv3 1 area 0.0.0.0

 mac-address 0000-0010-0010

 ipv6 address FE80::80 link-local

 ipv6 address 100::100/64

#

interface Vlan-interface101

 ip address 101.1.1.2 255.255.255.0

 ospf 1 area 0.0.0.0

 ospfv3 1 area 0.0.0.0

 ipv6 address 101::2/64

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 combo enable fiber

 port link-aggregation group 3

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 combo enable fiber

 port link-aggregation group 3

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 1

#

interface GigabitEthernet1/0/4

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan all

 port link-aggregation group 1

#

interface GigabitEthernet1/0/5

 port link-mode route

 ip address 21.1.1.2 255.255.255.0

 ipv6 address 21::2/64

#

interface GigabitEthernet1/0/6

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 33

#

 m-lag system-mac 0002-0002-0002

 m-lag system-number 2

 m-lag system-priority 123

 m-lag keepalive ip destination 21.1.1.1 source 21.1.1.2

 m-lag mad exclude interface GigabitEthernet1/0/5

 m-lag mad exclude interface Vlan-interface100

 m-lag mad exclude interface Vlan-interface101

#

·     Device C:

#

 router id 5.5.5.5

#

ospf 1

 import-route direct

 area 0.0.0.0

#

ospfv3 1

 import-route direct

 area 0.0.0.0

#

vlan 1

#

vlan 22

#

vlan 32 to 33

#

interface Vlan-interface22

 ip address 22.1.1.1 255.255.255.0

 ipv6 address 22::1/64

#

interface Vlan-interface32

 ip address 32.1.1.1 255.255.255.0

 ospf 1 area 0.0.0.0

 ospfv3 1 area 0.0.0.0

 ipv6 address 32::2/64

#

interface Vlan-interface33

 ip address 33.1.1.2 255.255.255.0

 ospf 1 area 0.0.0.0

 ospfv3 1 area 0.0.0.0

 ipv6 address 33::2/64

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 32

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 33

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 22

#

·     Device D:

#

vlan 1

#

vlan 100

#

interface Bridge-Aggregation3

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 link-aggregation mode dynamic

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 port link-aggregation group 3

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 port link-aggregation group 3

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 port link-aggregation group 3

#

interface GigabitEthernet1/0/4

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 100

 port link-aggregation group 3

#