Maipu Administration Guide

Configure IPv6 Static Recursive Route

Network Requirements

On Device1, configure two static routes to the segment 192::3/128: one is reachable via Device2, and the other is reachable via Device3. Device1 first uses the line with Device3 to forward the packet.
On Device1, configure one static recursive route to the segment 2001:4::/64, and the gateway address is the loopback interface address of Device3 192::3. After the line between Device1 and Device3 fails, the route can switch to Device2 for communication.

Network Topology

Networking for configuring IPv6 static recursive route

Figure 4-4 Networking for configuring IPv6 static recursive route

Configuration Steps

Step 1: Configure the IPv6 address of the interface (omitted).

Step 2: Configure the IPv6 static route.

#Configure Device1.

Device1#configure terminal
Device1(config)#ipv6 route 192::3/128 2001:1::2
Device1(config)#ipv6 route 192::3/128 2001:2::2 10

#Configure Device2.

Device2#configure terminal
Device2(config)#ipv6 route 192::3/128 2001:3::2

Step 3: Configure the IPv6 static recursive route.

# Configure Device1.

Device1(config)#ipv6 route 2001:4::/64 192::3

#Query the IPv6 route table of Device1.

Device1#show ipv6 route 
Codes: C - Connected, L - Local, S - static, R - RIP, B - BGP, i-ISIS 
       U - Per-user Static route 
       O - OSPF, OE-OSPF External, M - Management 
 
L ::1/128 [0/0] 
     via ::, 2w0d:03:12:46, lo0
S 192::3/128 [1/10] 
     via 2001:1::2, 00:04:54, gigabitethernet0/2/0
C  2001:1::/64 [0/0] 
     via ::, 00:22:47, gigabitethernet0/2/0
L 2001:1::1/128 [0/0] 
     via ::, 00:22:45, lo0 C 2001:2::/64 [0/0] 
     via ::, 00:16:16, gigabitethernet0/2/1
L 2001:2::1/128 [0/0] 
     via ::, 00:16:15, lo0
S 2001:4::/64 [1/10] 
     via 192::3, 00:00:43, gigabitethernet0/2/0

In the IPv6 route table, you can see that the gateway address of the route 2001:4::/64 is 192::3, the egress interface is gigabitethernet0/2/0, and the route depends on the route 192::3/128.

Step 4: Check the result.

#After the line between Device1 and Device3 fails, query the IPv6 route table of Device1.

Device1#show ipv6 route 
Codes: C - Connected, L - Local, S - static, R - RIP, B - BGP, i-ISIS 
       U - Per-user Static route 
       O - OSPF, OE-OSPF External, M - Management 
 
L ::1/128 [0/0] 
     via ::, 2w0d:03:17:48, lo0
S 192::3/128 [10/10] 
     via 2001:2::2, 00:00:06, gigabitethernet0/2/1
C  2001:2::/64 [0/0] 
     via ::, 00:21:18, gigabitethernet0/2/1
L 2001:2::1/128 [0/0] 
     via ::, 00:21:17, lo0
S 2001:4::/64 [1/10] 
     via 192::3, 00:00:06, gigabitethernet0/2/1

Compared with the route table of step 3, you can see that the egress interface of the route 2001:4::/64 is gigabitethernet0/2/1, indicating that the route already switches to Device2 for communication.