Contents

Introduction· 1

Prerequisites· 1

Example: Configuring IPv6 IS-IS· 1

Network configuration· 1

Analysis· 2

Applicable hardware and software versions· 2

Procedures· 2

Configuring Switch A· 2

Configuring Switch B· 3

Configuring Switch C· 3

Configuring Switch D·· 4

Configuring Switch E· 5

Verifying the configuration· 5

Configuration files· 6

 

Introduction

This document provides IPv6 IS-IS 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 IPv6 IS-IS.

Example: Configuring IPv6 IS-IS

Network configuration

As shown in Figure 1, the company's headquarters and the branch run IPv6 IS-IS. The partner runs OSPFv3.

Configure the switches to meet the following requirements:

·     The Marketing department can reach the Finance department, the branch, and the partner.

·     The Finance department and the branch cannot reach each other, and the branch does not have a route to the Finance department.

Figure 1 Network diagram

 

Analysis

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

·     Configure Switch A and Switch B in Area 10 as Level-1 routers to allow communication between the Marketing department and the Finance department.

·     Configure route redistribution between IPv6 IS-IS and OSPFv3 on Switch D to allow communication between the Marketing department and the partner.

·     Configure Switch C to use a prefix list to advertise only network 3001:1::/64 to Level-2. So that the branch does not have a route to the Finance department.

Applicable hardware and software versions

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

 

Hardware	Software version
S6520X-HI switch series S6520X-EI switch series	Supported in Release 1110P01
S6520X-SI switch series S6520-SI switch series S5000-EI switch series MS4600 switch series	Supported in Release 1110P01

 

Procedures

Configuring Switch A

# Configure an IPv6 address for VLAN-interface 11.

<SwitchA> system-view

[SwitchA] interface vlan-interface 11

[SwitchA-Vlan-interface11] ipv6 address 2001:1::1 64

[SwitchA-Vlan-interface11] quit

# Configure IPv6 addresses for other interfaces, as shown in Figure 1. (Details not shown.)

# Configure IPv6 IS-IS.

[SwitchA] isis 1

[SwitchA-isis-1] is-level level-1

[SwitchA-isis-1] network-entity 10.3001.0001.0001.00

[SwitchA-isis-1] address-family ipv6

[SwitchA-isis-1-ipv6] quit

[SwitchA-isis-1] quit

[SwitchA] interface vlan-interface 11

[SwitchA–vlan-interface 11] isis ipv6 enable 1

[SwitchA–vlan-interface 11] quit

[SwitchA] interface vlan-interface 100

[SwitchA–Vlan-interface100] isis ipv6 enable 1

[SwitchA–Vlan-interface100] quit

Configuring Switch B

# Configure an IPv6 address for VLAN-interface 12.

<SwitchB> system-view

[SwitchB] interface vlan-interface 12

[SwitchB-Vlan-interface12] ipv6 address 2001:2::1 64

[SwitchB-Vlan-interface12] quit

# Configure IPv6 addresses for other interfaces, as shown in Figure 1. (Details not shown.)

# Configure IPv6 IS-IS.

[SwitchB] isis 1

[SwitchB-isis-1] is-level level-1

[SwitchB-isis-1] network-entity 10.3001.0002.0001.00

[SwitchB-isis-1] address-family ipv6

[SwitchB-isis-1-ipv6] quit

[SwitchB-isis-1] quit

[SwitchB] interface vlan-interface 12

[SwitchB–Vlan-interface12] isis ipv6 enable 1

[SwitchB–Vlan-interface12] quit

[SwitchB] interface vlan-interface 200

[SwitchB–Vlan-interface 200] isis ipv6 enable 1

[SwitchB–Vlan-interface 200] quit

Configuring Switch C

# Configure an IPv6 address for VLAN-interface 11.

<SwitchC> system-view

[SwitchC] interface vlan-interface 11

[SwitchC-Vlan-interface11] ipv6 address 2001:1::2 64

[SwitchC-Vlan-interface11] quit

# Configure IPv6 addresses for other interfaces, as shown in Figure 1. (Details not shown.)

# Configure IPv6 IS-IS.

[SwitchC] isis 1

[SwitchC-isis-1] is-level level-1

[SwitchC-isis-1] network-entity 10.2001.0010.0001.00

[SwitchC-isis-1] address-family ipv6

[SwitchC-isis-1-ipv6] quit

[SwitchC-isis-1] quit

[SwitchC] interface vlan-interface 10

[SwitchC–Vlan-interface10] isis ipv6 enable 1

[SwitchC–Vlan-interface10] quit

[SwitchC] interface vlan-interface 11

[SwitchC–Vlan-interface11] isis ipv6 enable 1

[SwitchC–Vlan-interface11] quit

[SwitchC] interface vlan-interface 12

[SwitchC–Vlan-interface12] isis ipv6 enable 1

[SwitchC–Vlan-interface12] quit

# Configure route leaking from Level-1 to Level-2, and use prefix list 1 to advertise only network 3001:1::/64 to Level-2.

[SwitchC] ipv6 prefix-list 1 permit 3001:1:: 64

[SwitchC] isis 1

[SwitchC] address-family ipv6

[SwitchC-isis-1-ipv6] import-route isisv6 level-1 into level-2 filter-policy prefix-list 1

[SwitchC-isis-1-ipv6] quit

[SwitchC-isis-1] quit

Configuring Switch D

# Configure an IPv6 address for VLAN-interface 10.

<SwitchD> system-view

[SwitchD] interface vlan-interface 10

[SwitchD-Vlan-interface10] ipv6 address 2001:10::2 64

[SwitchD-Vlan-interface10] quit

# Configure IPv6 addresses for other interfaces, as shown in Figure 1. (Details not shown.)

# Configure IPv6 IS-IS.

[SwitchD] isis 1

[SwitchD-isis-1] is-level level-2

[SwitchD-isis-1] network-entity 20.2001.0020.0001.00

[SwitchD-isis-1] address-family ipv6

[SwitchD-isis-1-ipv6] quit

[SwitchD-isis-1] quit

[SwitchD] interface vlan-interface 10

[SwitchD–Vlan-interface10] isis ipv6 enable 1

[SwitchD–Vlan-interface10] quit

[SwitchD] interface vlan-interface 20

[SwitchD–Vlan-interface20] isis ipv6 enable 1

[SwitchD–Vlan-interface20] quit

# Configure OSPFv3.

[SwitchD] ospfv3

[SwitchD-ospfv3-1] router-id 4.4.4.4

[SwitchD-ospfv3-1] quit

[SwitchD] interface vlan-interface 20

[SwitchD–Vlan-interface20] ospfv3 1 area 0

[SwitchD–Vlan-interface20] quit

# Redistribute OSPFv3 and direct routes into IPv6 IS-IS.

[SwitchD] isis 1

[SwitchD] address-family ipv6

[SwitchD-isis-1-ipv6] import-route ospfv3

[SwitchD-isis-1-ipv6] import-route direct

[SwitchD-isis-1-ipv6] quit

[SwitchD-isis-1] quit

# Redistribute IPv6 IS-IS and direct routes into OSPFv3.

[SwitchD] ospfv3 1

[SwitchD-ospfv3-1] import-route isisv6 1

[SwitchD-ospfv3-1] import-route direct

Configuring Switch E

# Configure an IPv6 address for VLAN-interface 20.

<SwitchE> system-view

[SwitchE] interface vlan-interface20

[SwitchE-Vlan-interface12] ipv6 address 2001:20::2 64

[SwitchE-Vlan-interface12] quit

# Configure IPv6 addresses for other interfaces, as shown in Figure 1. (Details not shown.)

# Configure OSPFv3.

[SwitchE] ospfv3

[SwitchE-ospfv3-1] router-id 5.5.5.5

[SwitchE-ospfv3-1] quit

[SwitchE] interface vlan-interface 20

[SwitchE–Vlan-interface 20] ospfv3 1 area 0

[SwitchE–Vlan-interface 20] quit

[SwitchE] interface vlan-interface 300

[SwitchE–Vlan-interface 300] ospfv3 1 area 0

[SwitchE–Vlan-interface 300] quit

Verifying the configuration

# Verify that the branch can reach the Marketing department, but cannot reach the Finance department.

[SwitchD] display isis route ipv6

                         Route information for IS-IS(1)

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

                         Level-2 IPv6 Forwarding Table

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

 Destination : 2001:10::                               PrefixLen: 64

 Flag        : D/L/-                                   Cost     : 10

 Next Hop    : Direct                                  Interface: Vlan10

 Destination : 2001:1::                                PrefixLen: 64

 Flag        : R/-/-                                   Cost     : 20

 Next Hop    : FE80::7625:8AFF:FE02:4D13               Interface: Vlan10

 Destination : 2001:2::                                PrefixLen: 64

 Flag        : R/-/-                                   Cost     : 20

 Next Hop    : FE80::7625:8AFF:FE02:4D13               Interface: Vlan10

 Destination : 3001:1::                                PrefixLen: 64

 Flag        : R/-/-                                   Cost     : 30

 Next Hop    : FE80::7625:8AFF:FE02:4D13               Interface: Vlan10

      Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set

# Verify that the company can communicate with the partner.

·     Display the IPv6 IS-IS routing table on Switch C.

[SwitchC] display isis route ipv6 level-2

                         Route information for IS-IS(1)

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

                         Level-2 IPv6 Forwarding Table

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

 Destination : 2001:10::                               PrefixLen: 64

 Flag        : D/L/-                                   Cost     : 10

 Next Hop    : Direct                                  Interface: Vlan10

 Destination : 2001:1::                                PrefixLen: 64

 Flag        : D/L/-                                   Cost     : 10

 Next Hop    : Direct                                  Interface: Vlan11

 Destination : 2001:2::                                PrefixLen: 64

 Flag        : D/L/-                                   Cost     : 10

 Next Hop    : Direct                                  Interface: Vlan12

 Destination : 2001:20::                               PrefixLen: 64

 Flag        : R/L/-                                   Cost     : 20

 Next Hop    : FE80::BAAF:67FF:FE30:3304               Interface: Vlan10

 Destination : 3001:200::                              PrefixLen: 64

 Flag        : R/-/-                                   Cost     : 20

 Next Hop    : FE80::BAAF:67FF:FE30:3304               Interface: Vlan10

      Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set

·     Ping 3001:200::1 from Switch A.

[SwitchA] ping ipv6 –a 3001:1::1 3001:200::1

Ping6(56 data bytes) 3001:1::1 --> 3001:200::1, press CTRL_C to break

56 bytes from 3001:200::1, icmp_seq=0 hlim=63 time=7.230 ms

56 bytes from 3001:200::1, icmp_seq=1 hlim=63 time=3.449 ms

56 bytes from 3001:200::1, icmp_seq=2 hlim=63 time=2.779 ms

56 bytes from 3001:200::1, icmp_seq=3 hlim=63 time=2.652 ms

56 bytes from 3001:200::1, icmp_seq=4 hlim=63 time=2.558 ms

--- Ping6 statistics for 3001:200::1 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 2.558/3.734/7.230/1.776 ms

Configuration files

·     Switch A:

#

isis 1

 is-level level-1

 network-entity 10.3001.0001.0001.00

 #

 address-family ipv6 unicast

#

vlan 11

#

vlan 100

#

interface Vlan-interface11

 isis ipv6 enable 1

 ipv6 address 2001:1::1/64

#

interface Vlan-interface100

 isis ipv6 enable 1

 ipv6 address 3001:1::1/64

#

·     Switch B:

#

isis 1

 is-level level-1

 network-entity 10.3001.0002.0001.00

 #

 address-family ipv6 unicast 

#

vlan 12

#

vlan 200

#

interface Vlan-interface12

 isis ipv6 enable 1

 ipv6 address 2001:2::1/64

#

interface Vlan-interface200

 isis ipv6 enable 1

 ipv6 address 3001:2::1/64

#

·     Switch C:

#

isis 1

 network-entity 10.2001.0010.0001.00

 #

 address-family ipv6 unicast

  import-route isisv6 level-1 into level-2 filter-policy prefix-list 1

#

vlan 11 to 13

#

interface Vlan-interface11

 isis ipv6 enable 1

 ipv6 address 2001:1::2/64

#

interface Vlan-interface12

 isis ipv6 enable 1

 ipv6 address 2001:2::2/64

#

interface Vlan-interface13

 isis ipv6 enable 1

 ipv6 address 2001:10::1/64

#

 ipv6 prefix-list 1 index 10 permit 3001:1:: 64

#

·     Switch D:

#

isis 1

 is-level level-2

 network-entity 20.2001.0020.0001.00

#

 address-family ipv6 unicast

 import-route direct

 import-route ospfv3 1

#

ospfv3 1

 router-id 4.4.4.4

 area 0.0.0.0

 import-route direct

 import-route isisv6 1

#

vlan 10

#

vlan 20

#

interface Vlan-interface10

 isis ipv6 enable 1

 ipv6 address 2001:10::2/64

#

interface Vlan-interface20

 ospfv3 1 area 0.0.0.0

 ipv6 address 2001:20::1/64

#

·     Switch E:

#

ospfv3 1

 router-id 5.5.5.5

 area 0.0.0.0

#

vlan 20

#

vlan 300

#

interface Vlan-interface20

 ospfv3 1 area 0

 ipv6 address 2001:20::2/64

#

interface Vlan-interface300

 ospfv3 1 area 0

 ipv6 address 3001:200::1/64

#