[c-nsp] Cisco and Juniper learning IPv6 neighbor different behavior

Phil Mayers p.mayers at imperial.ac.uk
Tue Sep 11 10:32:42 EDT 2012


On 11/09/12 14:55, Xu Hu wrote:
> Hi Experts,
>
> Any idea about the difference between Cisco and Juniper equipment?

Enough with the cross-posting!

> In the Juniper box, by default can learn the ULA, GUA and Link-local IPv6
> neighbor,
> In the Cisco box, by default just can learn the GUA and Link-local IPv6
> neighbor,

I can't speak for Juniper, but Cisco devices learn neighbours only when 
there is traffic to a neighbour. If you don't have traffic going to the 
ULA, it won't learn.

Can you ping the ULA from the Cisco?


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