[j-nsp] Problem with IPv6 ND and NS

John Neiberger jneiberger at gmail.com
Tue Dec 24 12:12:32 EST 2013

Well, the captures and the info I got from the router proved that the
router was not sending neighbor solicitations when new traffic was
arriving. However, when I pinged that destination from the directly
connected router itself, it did work. It's probably a bug and Juniper
will just tell us to upgrade, and rightfully so. I just hope we can
find a workaround in the interim.

On Tue, Dec 24, 2013 at 9:04 AM, John Neiberger <jneiberger at gmail.com> wrote:
> 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".
> Thanks!
> John
> 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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