Maipu Administration Guide

Configure RIPng Metric Offset

Network Requirements

Device1, Device2, Device3, and Device4 runs the RIPng protocol and interconnects with each other.
Device1 learns route 2001:5::/64 from both Device2 and Device3.
On Device1, set the route metric offset in the receive direction so that Device1 selects the route advertised by Device2 with priority.

Network Topology

Networking for configuring the RIPng metric offset

Figure 6-3 Networking for configuring the RIPng metric offset

Configuration Steps

Step 1: Create VLANs, and add ports to the required VLANs. (Omitted)

Step 2: Configure the IPv6 address of an interface (omitted).

Step 3: Configure RIPng.

#Configure Device1.

Device1#configure terminal
Device1(config)#ipv6 router rip 100
Device1(config-ripng)#exit
Device1(config)#interface vlan2
Device1(config-if-vlan2)#ipv6 rip enable 100
Device1(config-if-vlan2)#exit
Device1(config)#interface vlan3
Device1(config-if-vlan3)#ipv6 rip enable 100
Device1(config-if-vlan3)#exit

#Configure Device2.

Device2#configure terminal
Device2(config)#ipv6 router rip 100
Device2(config-ripng)#exit
Device2(config)#interface vlan2
Device2(config-if-vlan2)#ipv6 rip enable 100
Device2(config-if-vlan2)#exit
Device2(config)#interface vlan3
Device2(config-if-vlan3)#ipv6 rip enable 100
Device2(config-if-vlan3)#exit

#Configure Device3.

Device3#configure terminal
Device3(config)#ipv6 router rip 100
Device3(config-ripng)#exit
Device3(config)#interface vlan2
Device3(config-if-vlan2)#ipv6 rip enable 100
Device3(config-if-vlan2)#exit
Device3(config)#interface vlan3
Device3(config-if-vlan3)#ipv6 rip enable 100
Device3(config-if-vlan3)#exit

#Configure Device4.

Device4#configure terminal
Device4(config)#ipv6 router rip 100
Device4(config-ripng)#exit
Device4(config)#interface vlan2
Device4(config-if-vlan2)#ipv6 rip enable 100
Device4(config-if-vlan2)#exit
Device4(config)#interface vlan3
Device4(config-if-vlan3)#ipv6 rip enable 100
Device4(config-if-vlan3)#exit
Device4(config)#interface vlan4
Device4(config-if-vlan4)#ipv6 rip enable 100
Device4(config-if-vlan4)#exit

#View 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 ::, 2w5d:06:21:24, lo0
C 2001:1::/64 [0/0] 
     via ::, 00:02:05, vlan2
L 2001:1::1/128 [0/0] 
     via ::, 00:02:04, lo0
C 2001:2::/64 [0/0] 
     via ::, 00:02:02, vlan3
L 2001:2::1/128 [0/0] 
     via ::, 00:02:01, lo0 
R 2001:3::/64 [120/2] 
     via fe80::201:7aff:fec3:38a4, 00:02:03, vlan2
R  2001:4::/64 [120/2] 
     via fe80::201:7aff:fe11:2214, 00:00:48, vlan3
R 2001:5::/64 [120/3] 
     via fe80::201:7aff:fec3:38a4, 00:02:03, vlan2 
                [120/3] 
     via fe80::201:7aff:fe11:2214, 00:00:48, vlan3

In the route table of Device1, you can see two routes to 2001:5::/64.

Step 4: Configure the access list.

Device1(config)#ipv6 access-list extended RIPng
Device1(config-v6-list)#permit 10 2001:5::/64 any
Device1(config-v6-list)#commit
Device1(config-v6-list)#exit

Step 5: Configure a metric offset.

#On Device1, configure the metric offset list and increase the metric of the route that has been learnt from interface vlan3 and matches ACL to 3.

Device1(config)# ipv6 router rip 100
Device1(config-ripng)#offset-list RIPng in 3 vlan3
Device1(config-ripng)#exit

Step 6: Check the result.