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

[Xu Hu]

If I generate the traffic once a while, then stop, the neighbour will disappear sometime later or not?

If I configure the GUA and ULA address for the same interface, then generate the traffic, the router will learn both of the neighbours or just one of them?

Because in my lab, previous cannot learn the neighbour, after I configure one more address using GUA, the traffic is success, but I found after I delete the GUA, and also clear neighbour, just use the ULA, the traffic also can reach, so I am confused about the issue.

Thanks and regards,
Xu Hu

On 11 Sep, 2012, at 22:32, Phil Mayers <p.mayers at imperial.ac.uk> wrote:

> 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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