[j-nsp] EX4550 apparently dropping IPv6 RA

[John Neiberger]

This does seem to be specific to RA/RS. I haven't been involved in
troubleshooting over the weekend but the updates I read said that they took
some packet captures of RA messages from the Cisco 7600 that the switch
used to be connected to and compared them with captures taken from the
MX960. They found some differences and adjusted to the configuration to
make them the same, but that still did not resolve the problem. The issue
has been escalated with Juniper. Last I read, no one really has any idea
yet what is going on. They've got an action plan for tomorrow, so I'll know
more after a meeting in the morning. Sure seems awfully funky, though. JTAC
seems to be at a loss to explain what is happening.

Thanks,
John


On Sun, Jun 15, 2014 at 5:22 AM, Phil Mayers <p.mayers at imperial.ac.uk>
wrote:

> On 14/06/14 22:24, John Neiberger wrote:
>
>  The EX4550 is just layer two. There is no routing configured on it, so it
>> should just be passing the RAs from the router to the hosts on the second
>> switch, but that doesn't seem to be happening.
>>
>
> Is it RA/RS specific, or is forwarding to fe80::1 and related groups
> broken?
>
>
>  Have any of you ever seen anything quite like this?
>>
>
> On other platforms, I've seen IPv6 link-local multicast fail to flow as
> some tiny table, sized with IPv4 assumptions, overflowed.
>
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