Maipu Administration Guide

Configure IPv6 Static Floating Route

Network Requirements

On Device1, configure two static routes to the segment 2001:3::/64: one is reachable via Device2, and the other is reachable via Device3.
Device1 first uses the line with Device2 to forward the packet. When the line fails, switch to Device3 for communication.

Network Topology

Networking for configuring the IPv6 static floating route

Figure 4-2 Networking for configuring the IPv6 static floating route

Configuration Steps

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

Step 2: Configure the IPv6 static route.

#On Device1, configure two IPv6 static routes to the segment 2001:3::/64 passing Device2 and Device3 respectively.

Device1#configure terminal
Device1(config)#ipv6 route 2001:3::/64 2001:1::2
Device1(config)#ipv6 route 2001:3::/64 2001:2::2

#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:02:13:16, lo0 C 2001:1::/64 [0/0] 
     via ::, 00:22:33, gigabitethernet0/2/0
L 2001:1::1/128 [0/0] 
     via ::, 00:22:32, lo0 C 2001:2::/64 [0/0] 
     via ::, 00:17:47, gigabitethernet0/2/1
L 2001:2::1/128 [0/0] 
     via ::, 00:17:46, lo0
S 2001:3::/64 [1/10] 
     via 2001:1::2, 00:01:47, gigabitethernet0/2/0 
                [1/10] 
     via 2001:2::2, 00:01:36, gigabitethernet0/2/1

You can see that there are two routes to segment 2001:3::/64 on Device1, forming the load balance.

Step 3: Configure the IPv6 floating route.

#Configure Device1, modify the management distance of the route with the gateway 2001:2::2 as 15, making it become floating route.

Device1(config)#ipv6 route 2001:3::/64 2001:2::2 15

Step 4: Check the result.

#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:02:16:38, lo0
C 2001:1::/64 [0/0] 
     via ::, 00:25:56, gigabitethernet0/2/0
L 2001:1::1/128 [0/0] 
     via ::, 00:25:55, lo0 C 2001:2::/64 [0/0] 
     via ::, 00:21:10, gigabitethernet0/2/1
L 2001:2::1/128 [0/0] 
     via ::, 00:21:09, lo0
S 2001:3::/64 [1/10] 
     via 2001:1::2, 00:05:10, gigabitethernet0/2/0

In the IPv6 route table, you can see that the route with the management distance 1 is prior to the route with the management distance 15, so the route with the gateway 2001:2::2 is deleted.

#After the line between Device1 and Device2 fails, query the 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:02:21:06, lo0
C 2001:2::/64 [0/0] 
     via ::, 00:25:38, gigabitethernet0/2/1
L 2001:2::1/128 [0/0] 
     via ::, 00:25:37, lo0
S 2001:3::/64 [15/10] 
     via 2001:2::2, 00:00:05, gigabitethernet0/2/1

In the IPv6 route table, you can see that the route with the larger management distance is added to the route table, and Device3 forwards the data.

The largest feature of the static floating route is that it can back up the route.