PE to CE running IPv6

[chieftan]

Hi all

Let's see if I can get an answer to this before I solve it myself

SCENARIO: PE --> CE (Provider equipment --> Customer equipment)
PE + CE routers running IPv6 and IS-IS as the IGP.

PROBLEM: Lo0 is running IPv6 only on both systems (Dual-Stacking will be utilised later and that's not a problem). Because IPv6 is being utilised and not IPv4 normal BGP configuration cannot be completed as there is no router-id (I could manually put one in but it will only accept an IPv4 format). So, it appears my only option would be to run MP-BGP.

Having completed some investigation on the Cisco site and following their examples, I still get the error of "BGP-4-NORTRID: BGP could not pick a router-id. Please configure manually."

Normally with IPv4 the RID would be dynamic from the lo0 interface but it only accepts 32bits and not 128 bits.

Here is a snippet of the config I placed on both routers:

CE
interface Loopback0
no ip address
ipv6 address xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx/128
ipv6 router isis area2

interface FastEthernet0/0
no ip address
duplex full
ipv6 address xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx/48
ipv6 router isis area2

router isis area2
net 49.xxxx.xxxx.xxxx.xxxx.00

router bgp 64600
bgp log-neighbor-changes
neighbor xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx remote-as 64512
neighbor xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx update-source FastEthernet0/0 - this is the CE interface to the PE

address-family ipv6
neighbor xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx activate
neighbor xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx route-map nh6 out

ipv6 prefix-list ninegroup seq 5 permit xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx/48 le 128
ipv6 prefix-list ninegroup seq 10 deny ::/0
route-map nh6 permit 10
match ipv6 address prefix-list ninegroup
set ipv6 next-hop xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx

So, as far as I can see this should work and accept the IPv6 lo0 RID, but it is not.

Anyone else come across this?

 

[chieftan]

Okay, apologies, that was a bit quick solving it myself.......

I decided to use an alternative method, which has worked. It's just easier to manually set an RID ... so, I did and it is all up and running. I can live with that.