IPv6 IS-IS basic configuration example
Network requirements
As shown in Figure 113, Switch A, Switch B, Switch C, and Switch D reside in the same autonomous system, and all are enabled with IPv6.
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. Switch A, Switch B, and Switch C are in area 10, and Switch D is in area 20.
Figure 113: Network diagram
Configuration procedure
Configure IPv6 addresses for interfaces. (Details not shown.)
Configure IPv6 IS-IS:
# Configure Switch A.
<SwitchA> system-view [SwitchA] ipv6 [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] ipv6 [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] ipv6 [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] ipv6 [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
Verify the configuration:
# Display the IPv6 IS-IS routing table on Switch A.
[SwitchA] display isis route ipv6 Route information for ISIS(1) ----------------------------- ISIS(1) IPv6 Level-1 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 RM, 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 ISIS(1) ----------------------------- ISIS(1) IPv6 Level-1 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 RM, 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 ISIS(1) ----------------------------- ISIS(1) IPv6 Level-1 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 RM, L-Advertised in LSPs, U-Up/Down Bit Set ISIS(1) IPv6 Level-2 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 RM, 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 ISIS(1) ----------------------------- ISIS(1) IPv6 Level-2 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 RM, L-Advertised in LSPs, U-Up/Down Bit Set