[j-nsp] Parallel BGP sessions for v6 prefixes over v4 and v6

Alexandre Snarskii snar at snar.spb.ru
Tue Jul 9 07:25:12 EDT 2024


On Mon, Jul 08, 2024 at 11:33:48AM -0400, Andrey Kostin via juniper-nsp wrote:
[...]
> The problem here is that route-reflector selects a path with ipv4 mapped 
> nexthop and advertises it over ipv6 session. I'm wondering, is anybody 
> already encountered this problem and found a solution how to make a RR 
> to advertise paths with a correct nexthop?

Have you considered making your inet6 sessions not unicast but labeled-unicast 
explicit-null too ? I guess it may prevent bgp from losing label..

> I know that having two session for ipv6 adds complexity and one of them 
> can be removed, but interested to find out an elegant solution for this 
> issue.
> 
> Kind regards,
> Andrey
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