Contents

Introduction· 1

Prerequisites· 1

Example: Configuring static MAC address entries· 1

Network configuration· 1

Applicable hardware and software versions· 1

Procedures· 2

Verifying the configuration· 3

Configuration files· 3

Example: Configuring MAC address move suppression· 4

Network configuration· 4

Analysis· 4

Applicable hardware and software versions· 5

Procedures· 6

Configuring Device A· 6

Configuring Device B and Device C·· 6

Verifying the configuration· 7

Configuration files· 7

 

Introduction

This document provides MAC address table configuration examples.

Prerequisites

The configuration examples in this document 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.

This document assumes that you have basic knowledge of the MAC address table.

Example: Configuring static MAC address entries

Network configuration

As shown in Figure 1, for secure communication between users in VLAN 100 and the server, perform the following tasks:

·     Assign GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3 to VLAN 100.

·     Add a static MAC address entry on Device to bind the server MAC address to GigabitEthernet 1/0/2.

Figure 1 Network diagram

 

Applicable hardware and software versions

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

 

Hardware	Software version
S6520XE-HI switch series	Supported in Release 11xx
S5560X-EI switch series	Supported in Release 111x
S5500V2-EI switch series	Supported in Release 111x
MS4520V2-30F switch	Supported in Release 111x
S5560S-EI switch series S5560S-SI switch series	Supported in Release 612x
S5130S-HI switch series S5130S-EI switch series S5130S-SI switch series S5130S-LI switch series	Supported in Release 612x
S5120V2-SI switch series S5120V2-LI switch series	Supported in Release 612x
S3100V3-EI switch series S3100V3-SI switch series	Supported in Release 612x
S5110V2 switch series	Supported in Release 612x
S5110V2-SI switch series	Supported in Release 612x
S5000V3-EI switch series	Supported in Release 612x
S5000E-X switch series	Supported in Release 612x
WAS6000 switch series	Supported in Release 612x
E128C switch E152C switch E500C switch series E500D switch series	Supported in Release 612x
MS4520V2 switch series (except the MS4520V2-30F switch)	Supported in Release 612x
MS4320V2 switch series MS4300V2 switch series MS4320 switch series MS4200 switch series	Supported in Release 612x
WS5850-WiNet switch series	Supported in Release 612x
WS5820-WiNet switch series WS5810-WiNet switch series	Supported in Release 612x

 

Procedures

# Create VLAN 100, and assign GigabitEthernet 1/0/2 to VLAN 100.

<Device> system-view

[Device] vlan 100

[Device-vlan100] quit

[Device] interface gigabitethernet 1/0/2

[Device-GigabitEthernet1/0/2] port link-mode bridge

[Device-GigabitEthernet1/0/2] port access vlan 100

[Device-GigabitEthernet1/0/2] undo shutdown

[Device-GigabitEthernet1/0/2] quit

# Configure GigabitEthernet 1/0/3 (port connected to the LAN switch) as a trunk port, and assign the port to VLAN 100.

[Device] interface gigabitethernet 1/0/3

[Device-GigabitEthernet1/0/3] port link-mode bridge

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

[Device-GigabitEthernet1/0/3] port trunk permit vlan 100

[Device-GigabitEthernet1/0/3] undo shutdown

[Device-GigabitEthernet1/0/3] quit

# Add a static entry for MAC address 0000-fc00-a249 on GigabitEthernet 1/0/2 that belongs to VLAN 100.

[Device] mac-address static 0000-fc00-a249 interface gigabitethernet 1/0/2 vlan 100

Verifying the configuration

# Verify that any 10.0.0.0/24 host in VLAN 100 can communicate with the server. (Details not shown.)

# Verify that the static MAC address entry has been added.

[Device] display mac-address

MAC Address      VLAN ID    State            Port/NickName            Aging

0000-fc00-a249   100        Static           GE1/0/2                  N

7425-8a02-4d00   100        Learned          GE1/0/3                  Y

…

Configuration files

	IMPORTANT: The port link-mode bridge command is available only on the following switches: ·     S6520XE-HI switch series. ·     S5560X-EI switch series. ·     S5500V2-EI switch series. ·     MS4520V2-30F switch.

 

#

sysname Device

#

vlan 1

#

vlan 100

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port access vlan 100

 mac-address static 0000-fc00-a249 vlan 100

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

#

Example: Configuring MAC address move suppression

Network configuration

As shown in Figure 2, Devices A, B, and C form a loop because of cable misconnection, and spanning tree protocols are not enabled on the devices. As a result, MAC addresses are frequently moves among Devices A, B, and C. To deal with loop-triggered MAC flapping, perform the following tasks:

·     Display MAC address move records to locate the Layer 2 loop.

·     Configure MAC address move suppression on Device A to eliminate the Layer 2 loop.

Figure 2 Network diagram

 

Analysis

To meet the network requirements, you must perform the following tasks:

·     For Devices A, B, and C to communicate with each other, assign all inter-connected ports to VLAN 100.

·     Configure MAC address move suppression on one or more ports of Device A.

·     To monitor the port status change of Device A, enable the log monitoring of the current terminal feature.

·     For loop detection, create VLAN-interface 100 and assign an IP address to the interface on each device.

·     To display MAC address move records, ping Device B from Device A.

Applicable hardware and software versions

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

 

Hardware	Software version
S6520XE-HI switch series	Supported in Release 11xx
S5560X-EI switch series	Supported in Release 111x
S5500V2-EI switch series	Supported in Release 111x
MS4520V2-30F switch	Supported in Release 111x
S5560S-EI switch series S5560S-SI switch series	Supported in Release 612x
S5130S-HI switch series S5130S-EI switch series S5130S-SI switch series S5130S-LI switch series	Supported in Release 612x
S5120V2-SI switch series S5120V2-LI switch series	Supported in Release 612x
S3100V3-EI switch series S3100V3-SI switch series	Supported in Release 612x
S5110V2 switch series	Supported in Release 612x
S5110V2-SI switch series	Supported in Release 612x
S5000V3-EI switch series	Supported in Release 612x
S5000E-X switch series	Supported in Release 612x
WAS6000 switch series	Supported in Release 612x
E128C switch E152C switch E500C switch series E500D switch series	Supported in Release 612x
MS4520V2 switch series (except the MS4520V2-30F switch)	Supported in Release 612x
MS4320V2 switch series MS4300V2 switch series MS4320 switch series MS4200 switch series	Supported in Release 612x
WS5850-WiNet switch series	Supported in Release 612x
WS5820-WiNet switch series WS5810-WiNet switch series	Supported in Release 612x

 

Procedures

Configuring Device A

# Enable the monitoring of logs on the current terminal.

<DeviceA> terminal monitor

<DeviceA> terminal debugging

# Create VLAN 100.

<DeviceA> system-view

[DeviceA] vlan 100

[DeviceA-vlan100] quit

# Configure GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 as trunk ports, and assign the ports to VLAN 100.

[DeviceA] interface range gigabitethernet 1/0/1 gigabitethernet 1/0/2

[DeviceA-if-range] port link-mode bridge

[DeviceA-if-range] port link-type trunk

[DeviceA-if-range] port trunk permit vlan 100

[DeviceA-if-range] undo shutdown

[DeviceA-if-range] quit

# Set the suppression interval to 300 seconds. A suppressed port will automatically come up after 300 seconds.

[DeviceA] mac-address notification mac-move suppression interval 300

# Set the suppression threshold to 0. A port will be shut down when the system detects a MAC address move on the port within a MAC move detection interval (1 minute by default).

[DeviceA] mac-address notification mac-move suppression threshold 0

# Enable MAC address move suppression on GigabitEthernet 1/0/1.

[DeviceA] interface gigabitethernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] mac-address notification mac-move suppression

[DeviceA-GigabitEthernet1/0/1] quit

# Create VLAN-interface 100, and assign an IP address to the interface.

[DeviceA] interface vlan-interface 100

[DeviceA-Vlan-interface100] ip address 10.0.0.1 24

[DeviceA-Vlan-interface100] quit

Configuring Device B and Device C

1.     Configure Device B:

# Create VLAN 100.

<DeviceB> system-view

[DeviceB] vlan 100

[DeviceB-vlan100] quit

# Configure GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 as trunk ports, and assign the ports to VLAN 100.

[DeviceB] interface range gigabitethernet 1/0/1 gigabitethernet 1/0/2

[DeviceB-if-range] port link-mode bridge

[DeviceB-if-range] port link-type trunk

[DeviceB-if-range] port trunk permit vlan 100

[DeviceB-if-range] undo shutdown

[DeviceB-if-range] quit

# Create VLAN-interface 100, and assign an IP address to the interface.

[DeviceB] interface vlan-interface 100

[DeviceB-Vlan-interface100] ip address 10.0.0.2 24

[DeviceB-Vlan-interface100] quit

2.     Configure Device C in the same way Device B was configured. (Details not shown.)

Verifying the configuration

# Ping Device B from Device A. (Details not shown.)

# Verify that GigabitEthernet 1/0/1 on Device A is shut down.

[DeviceA] %Dec 11 09:51:06:309 2016 DeviceA IFNET/3/PHY_UPDOWN: -MDC=1; Physical state on the GigabitEthernet1/0/1 changed to down.

%Dec 11 09:51:06:323 2016 DeviceA IFNET/5/LINK_UPDOWN: -MDC=1; Line protocol state on

the interface GigabitEthernet1/0/1 changed to down.

# Verify that GigabitEthernet 1/0/1 is shut down because a MAC address move is detected.

[DeviceA] display interface gigabitethernet 1/0/1

GigabitEthernet1/0/1

Current state: mac-address moving down

Line protocol state: DOWN

...

# Verify that GigabitEthernet 1/0/1 comes up automatically after 300 seconds.

[DeviceA] %Dec 11 09:56:07:002 2016 DeviceA IFNET/3/PHY_UPDOWN: -MDC=1; Physical state on the GigabitEthernet1/0/1 changed to up.

%Dec 11 09:56:07:004 2016 DeviceA IFNET/5/LINK_UPDOWN: -MDC=1; Line protocol state on

the interface GigabitEthernet1/0/1 changed to up.

# Verify that the MAC address of Device B's VLAN-interface 100 moves between GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2. You can manually shut down either port to eliminate the loop.

[DeviceA] display mac-address mac-move

MAC address    VLAN Current port  Source port   Last time              Times

0000-fc00-6506 100  GE1/0/2       GE1/0/1       2014-12-11 09:29:48    3

0000-fc00-6506 100  GE1/0/1       GE1/0/2       2014-12-11 09:51:03    4

 

---  2 MAC address moving records found  ---

Configuration files

	IMPORTANT: The port link-mode bridge command is available only on the following switches: ·     S6520XE-HI switch series. ·     S5560X-EI switch series. ·     S5500V2-EI switch series. ·     MS4520V2-30F switch.

 

·     Device A:

#

sysname DeviceA

#

mac-address notification mac-move suppression interval 300

mac-address notification mac-move suppression threshold 0

#

vlan 1

#

vlan 100

#

interface Vlan-interface100

 ip address 10.0.0.1 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

 mac-address notification mac-move suppression

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

#

·     Device B:

#

sysname DeviceB

#

vlan 1

#

vlan 100

#

interface Vlan-interface100

 ip address 10.0.0.2 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

#

·     Device C:

#

sysname DeviceC

#

vlan 1

#

vlan 100

#

interface Vlan-interface100

 ip address 10.0.0.3 255.255.255.0

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 100

#