Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.


PE to CE running IPv6

PE to CE running IPv6

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:

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?

RE: PE to CE running IPv6

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.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!


Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close