[j-nsp] Problem with IPv6 ND and NS

John Neiberger jneiberger at gmail.com
Tue Dec 24 11:04:58 EST 2013

We're in the process of upgrading all of our MXs running older code,
but we haven't gotten to this router just yet. We are upgrading to
some flavor of 11.4, as I recall. I have someone working on getting a
capture, but I will grab what I can using "monitor traffic interface".


On Tue, Dec 24, 2013 at 3:08 AM,  <sthaug at nethelp.no> wrote:
>> I'm running into an odd problem that seems to be related to v6
>> neighbor discovery on an MX960 running 9.6R4. Here is a simplified
>> topology for explanation:
> ...
>> Have any of you run into this type of situation? it sure is starting
>> to look like a bug in this code where it isn't actually sending an NS
>> message upon the arrival of traffic destined for a neighbor not in the
>> cache.
> Sorry, never seen this. Getting a packet capture from the server
> sounds like a good idea - however, you should also be able to see
> any IPv6 NS/ND activity by using "monitor traffic interface ..."
> on the RouterB interface towards the host.
> Also, you might want to consider a newer JunOS release. 9.6 is EOL.
> Personally I would recommend at least 11.4R8.
> Steinar Haug, Nethelp consulting, sthaug at nethelp.no

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