IPv6: numbering of point-to-point-links

Tue Feb 1 03:43:01 UTC 2011

On 1/31/11 9:13 AM, Blake Hudson wrote:
> 
> I setup a p2p /127 link and found that BGP would not peer over the link;
> Changing to /126 resolved the problem. I never looked into it further
> because I had intended to use /126 from the start. My guess is that
> while BGP should be a unicast IP, Cisco's implementation uses an anycast
> in some cases, disregarding the configured unicast address.
> 
> Just one practical example...
> 

Sprint runs a /127 for my dual stack circuit with BGP; I know their side
is Cisco as is mine.

~Seth