Ran into a problem the other day where I was trying to configure VRRPv3 (which supports IPv6) between a Juniper MX480 and a Cisco 6509-E w/ SUP2T. The only config guide I could find for the Cisco device was this. While fairly detailed on turning on VRRP, (and remember you need this command)
fhrp version vrrp v3
it did not go into any detail for the actual IPv6 implementation! I already pinged the appropriate people but I thought I would share my config below in the meantime. The main thing to note is that when configuring IPv6 w/ VRRPv3 you have to manually add the link locals (as of the 15.1.1 ~Nov 18th, 2012).
So I won’t put a diagram here but basically just imagine a port-channel between the Cisco & Juniper that only allows vlan 2100. Here is the Cisco config->
interface Vlan2100 ip address 201.13.110.2 255.255.254.0 ipv6 address 2201:13:110::2/64 ipv6 enable vrrp 1 address-family ipv4 priority 120 address 201.13.110.1 primary exit-vrrp vrrp 1 address-family ipv6 priority 120 address FE80::13:110:1 primary address 2201:13:110::1/64 exit-vrrp end
So the Juniper will automatically create a link-local address but you can override it (which you have to do if you are doing it on the Cisco). Here is my Juniper config->
irb {
unit 2100 {
description "Voice Vlan";
family inet {
address 201.13.110.3/23 {
vrrp-group 1 {
virtual-address 201.13.110.1;
accept-data;
}
}
}
family inet6 {
address 2201:13:110::3/64 {
vrrp-inet6-group 1 {
virtual-inet6-address 2201:13:110::1;
virtual-link-local-address fe80::13:110:1;
accept-data;
}
}
This config worked perfectly, and although it looks simple now it was pretty annoying to figure out that the routers were not smart enough to sync on their link-local if they have the same virtual global or vice versa. Hopefully this will help someone out there! If you have any questions, advice, etc make comments below. Thanks.