Cisco’s EIGRP is one of the routing protocols suitable for IPv6. Configuration is a bit different, and in this lesson, I’ll demonstrate to you how to configure it. This is the topology we’ll use:
I don’t have any global unicast IPv6 addresses on the FastEthernet interface because the EIGRP updates will be sent using the link-local addresses.
First, we will enable routing for IPv6:
R1 & R2 (config)#ipv6 unicast-routing
And let’s configure some IPv6 addresses:
R1 & R2 (config)#interface GigabitEthernet 0/1 (config-if)#ipv6 enable
R1(config)#interface loopback 0 R1(config-if)#ipv6 address 2001::1/128
R2(config)#interface loopback 0 R2(config-if)#ipv6 address 2001::2/128
Enabling IPv6 on the Gigabit interfaces will generate an IPv6 link-local address. The loopback interfaces will have a global unicast address. Let’s verify our work:
R1#show ipv6 interface brief GigabitEthernet0/1 [up/up] FE80::F816:3EFF:FE7B:61CA Loopback0 [up/up] FE80::F816:3EFF:FEC5:1BD7 2001::1
R2#show ipv6 interface brief GigabitEthernet0/1 [up/up] FE80::F816:3EFF:FE8F:4F66 Loopback0 [up/up] FE80::F816:3EFF:FED1:4100 2001::2
After configuring the IPv6 addresses on the loopback interface, you can see the global unicast and the link-local IPv6 addresses.
This is how you enable EIGRP for IPv6:
R1(config)#ipv6 router eigrp 1 R1(config-rtr)#router-id 188.8.131.52 R1(config-rtr)#no shutdown R1(config)#interface GigabitEthernet 0/1 R1(config-if)#ipv6 eigrp 1 R1(config)#interface loopback 0 R1(config-if)#ipv6 eigrp 1
R2(config)#ipv6 router eigrp 1 R2(config-rtr)#router-id 184.108.40.206 R2(config-rtr)#no shutdown R2(config)#interface GigabitEthernet 0/1 R2(config-if)#ipv6 eigrp 1 R2(config)#interface loopback 0 R2(config-if)#ipv6 eigrp 1
First, you need to start EIGRP with the
ipv6 router eigrp command. The number you see is the autonomous system number, which must match on both routers. Each EIGRP router needs a router ID which is the highest IPv4 address on the router.
If you don’t have any IPv4 addresses, you need to specify router IDs yourself with the
router-id command. By default, the EIGRP process is in shutdown mode, and you need to type
no shutdown to activate it.
The last step is to enable it on the interfaces with the ipv6 eigrp command. Let’s verify our configuration:
Very helpful and easy to learn!
easy to understand! thanks!
just fyi, i simulate it on GNS3, using 7200 15.2ios. under ipv6 router eigrp 1, theres no “router-id” command, you need to go “eigrp router-id 220.127.116.11”
The neighbor of futura router is
FE80::C00F:1AFF:FEA7:0, But this IP doesnot show in output of
Destiny#show ipv6 interface brief. Is there some output error of
show ipv6 interface briefof both the routers??
I think I had a copy/paste error here. Just fixed the show commands, they are showing the correct addresses now.
I also did this lab and just as the first poster stated there is no Router-ID command.
note I tested this on the newest cisco VIRL IOS that I have imported into GNS3 and I also tested on the 7200 model. So neither of the routers can use this command. this means it must be something legacy or a typo. also the 7200 gns3 image is quite a bit older than the newer cisco VIRL image that both did not work says this has probably not been an option for a while.
I did go bac... Continue reading in our forum