IPv6 IS-IS basic configuration example
Network requirements
As shown in Figure 97, Switch A, Switch B, Switch C, and Switch D, all enabled with IPv6, reside in the same AS. Configure IPv6 IS-IS on the switches so that they can reach each other.
Switch A and Switch B are Level-1 switches, Switch D is a Level-2 switch, and Switch C is a Level-1-2 switch.
Figure 97: Network diagram
Configuration procedure
Configure IPv6 addresses for interfaces. (Details not shown.)
Configure IPv6 IS-IS:
# Configure Switch A.
<SwitchA> system-view [SwitchA] isis 1 [SwitchA-isis-1] is-level level-1 [SwitchA-isis-1] network-entity 10.0000.0000.0001.00 [SwitchA-isis-1] ipv6 enable [SwitchA-isis-1] quit [SwitchA] interface vlan-interface 100 [SwitchA-Vlan-interface100] isis ipv6 enable 1 [SwitchA-Vlan-interface100] quit
# Configure Switch B.
<SwitchB> system-view [SwitchB] isis 1 [SwitchB-isis-1] is-level level-1 [SwitchB-isis-1] network-entity 10.0000.0000.0002.00 [SwitchB-isis-1] ipv6 enable [SwitchB-isis-1] quit [SwitchB] interface vlan-interface 200 [SwitchB-Vlan-interface200] isis ipv6 enable 1 [SwitchB-Vlan-interface200] quit
# Configure Switch C.
<SwitchC> system-view [SwitchC] isis 1 [SwitchC-isis-1] network-entity 10.0000.0000.0003.00 [SwitchC-isis-1] ipv6 enable [SwitchC-isis-1] quit [SwitchC] interface vlan-interface 100 [SwitchC-Vlan-interface100] isis ipv6 enable 1 [SwitchC-Vlan-interface100] quit [SwitchC] interface vlan-interface 200 [SwitchC-Vlan-interface200] isis ipv6 enable 1 [SwitchC-Vlan-interface200] quit [SwitchC] interface vlan-interface 300 [SwitchC-Vlan-interface300] isis ipv6 enable 1 [SwitchC-Vlan-interface300] quit
# Configure Switch D.
<SwitchD> system-view [SwitchD] isis 1 [SwitchD-isis-1] is-level level-2 [SwitchD-isis-1] network-entity 20.0000.0000.0004.00 [SwitchD-isis-1] ipv6 enable [SwitchD-isis-1] quit [SwitchD] interface vlan-interface 300 [SwitchD-Vlan-interface300] isis ipv6 enable 1 [SwitchD-Vlan-interface300] quit [SwitchD] interface vlan-interface 301 [SwitchD-Vlan-interface301] isis ipv6 enable 1 [SwitchD-Vlan-interface301] quit
Verifying the configuration
# Display the IPv6 IS-IS routing table on Switch A.
[SwitchA] display isis route ipv6
Route information for IS-IS(1)
------------------------------
Level-1 IPv6 Forwarding Table
-----------------------------
Destination : :: PrefixLen: 0
Flag : R/-/- Cost : 10
Next Hop : FE80::200:FF:FE0F:4 Interface: Vlan100
Destination : 2001:1:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : Direct Interface: Vlan100
Destination : 2001:2:: PrefixLen: 64
Flag : R/-/- Cost : 20
Next Hop : FE80::200:FF:FE0F:4 Interface: Vlan100
Destination : 2001:3:: PrefixLen: 64
Flag : R/-/- Cost : 20
Next Hop : FE80::200:FF:FE0F:4 Interface: Vlan100
Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set
# Display the IPv6 IS-IS routing table on Switch B.
[SwitchB] display isis route ipv6
Route information for IS-IS(1)
------------------------------
Level-1 IPv6 Forwarding Table
-----------------------------
Destination : :: PrefixLen: 0
Flag : R/-/- Cost : 10
Next Hop : FE80::200:FF:FE0F:4 Interface: Vlan200
Destination : 2001:1:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : FE80::200:FF:FE0F:4 Interface: Vlan200
Destination : 2001:2:: PrefixLen: 64
Flag : R/-/- Cost : 20
Next Hop : Direct Interface: Vlan200
Destination : 2001:3:: PrefixLen: 64
Flag : R/-/- Cost : 20
Next Hop : FE80::200:FF:FE0F:4 Interface: Vlan200
Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set
# Display the IPv6 IS-IS routing table on Switch C.
[SwitchC] display isis route ipv6
Route information for IS-IS(1)
------------------------------
Level-1 IPv6 Forwarding Table
-----------------------------
Destination : 2001:1:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : Direct Interface: Vlan100
Destination : 2001:2:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : Direct Interface: Vlan200
Destination : 2001:3:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : Direct Interface: Vlan300
Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set
Level-2 IPv6 Forwarding Table
-----------------------------
Destination : 2001:1:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : Direct Interface: Vlan100
Destination : 2001:2:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : Direct Interface: Vlan200
Destination : 2001:3:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : Direct Interface: Vlan300
Destination : 2001:4::1 PrefixLen: 128
Flag : R/-/- Cost : 10
Next Hop : FE80::20F:E2FF:FE3E:FA3D Interface: Vlan300
Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set
# Display the IPv6 IS-IS routing table on Switch D.
[SwitchD] display isis route ipv6
Route information for IS-IS(1)
------------------------------
Level-2 IPv6 Forwarding Table
-----------------------------
Destination : 2001:1:: PrefixLen: 64
Flag : R/-/- Cost : 20
Next Hop : FE80::200:FF:FE0F:4 Interface: Vlan300
Destination : 2001:2:: PrefixLen: 64
Flag : R/-/- Cost : 20
Next Hop : FE80::200:FF:FE0F:4 Interface: Vlan300
Destination : 2001:3:: PrefixLen: 64
Flag : D/L/- Cost : 10
Next Hop : Direct Interface: Vlan300
Destination : 2001:4::1 PrefixLen: 128
Flag : D/L/- Cost : 0
Next Hop : Direct Interface: Loop1
Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set