IPv6 IS-IS MTR configuration example
Network requirements
As shown in Figure 115, enable IPv6 IS-IS MTR to make the switches perform route calculation separately in IPv4 and IPv6 topologies.
Figure 115: Network diagram
Configuration procedure
Configure IPv4 and IPv6 addresses and subnet masks for interfaces on the switches. (Details not shown.)
Configure IS-IS on the switches to make sure Switch A, Switch B, Switch C, and Switch D can communicate with each other at Layer 3 and dynamic route update can be implemented among them with IS-IS. (Details not shown.)
Configure IPv6 IS-IS MTR:
# Configure Switch A.
<SwitchA> system-view [SwitchA] isis [SwitchA-isis-1] cost-style wide [SwitchA-isis-1] multiple-topology ipv6-unicast
# Configure Switch B.
<SwitchB> system-view [SwitchB] isis [SwitchB-isis-1] cost-style wide [SwitchB-isis-1] multiple-topology ipv6-unicast
# Configure Switch D.
<SwitchD> system-view [SwitchD] isis [SwitchD-isis-1] cost-style wide [SwitchD-isis-1] multiple-topology ipv6-unicast
Verify the configuration:
# Display the IS-IS routing table of the IPv6 topology on Switch A.
[SwitchA-isis-1] display isis route ipv6 Route information for ISIS(1) ----------------------------- ISIS(1) IPv6 Level-1 Forwarding Table ------------------------------------- Destination: 12:: PrefixLen: 64 Flag : D/L/- Cost : 4 Next Hop : Direct Interface: Vlan12 Destination: 44::1 PrefixLen: 128 Flag : R/L/- Cost : 36 Next Hop : FE80::200:5EFF:FE00:F11 Interface: Vlan14 Destination: 14:: PrefixLen: 64 Flag : D/L/- Cost : 36 Next Hop : Direct Interface: Vlan14 Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set ISIS(1) IPv6 Level-2 Forwarding Table ------------------------------------- Destination: 12:: PrefixLen: 64 Flag : D/L/- Cost : 4 Next Hop : Direct Interface: Vlan12 Destination: 44::1 PrefixLen: 128 Flag : -/-/- Cost : 36 Destination: 14:: PrefixLen: 64 Flag : D/L/- Cost : 36 Next Hop : Direct Interface: Vlan14 Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit SetThe output interface of IPv6 route 44::1/128 destined to Switch D is VLAN-interface 14.