[j-nsp] IPv6 ND stopped working

[Alexander Koch]

On Fri, 6 May 2005 06:23:21 -0700, dave o'leary wrote:
> At 02:28 PM 5/6/2005 +0200, Alexander Koch wrote:
> >Folks,
> >
> >I have a problem with a customer that we connect to via a
> >switch, we both use Juniper, and it is the same VLAN on our
> >side for v4 and v6, and in the middle is a switch network
> >and he gets an untagged port. Effectively some time ago ND
> >stopped working and we could not ping each other then at
> >that time.
> >
> >When I do a monitor traffic interface etc. I only see my
> >packets going out (ICMP6 neighbor solicitations or so), but
> >none coming in. Our customer sees the very same, no inbound
> >requests for him.
> >
> >We both did a 'clear ipv6 neighbors' but that did not help.
> >
> >Anyone has any hint where to look at to debug this further?
> 
> It is implied in your description but not stated, so my first question:
> Is IPv4 working fine?

Yes, working perfectly.

> Second question - do you have access to the switch, and can you
> tell what is going on there?  Do you have a way to mirror the traffic
> and sniff it to see if the IPv6 is going through the switch?

We have access to the switch (management only) and no way at
this moment to sniff the traffic there.

> Can you be a little more specific about what you are doing to see
> the traffic going out (and not coming in)?  ("do a monitor traffic 
> interface etc")

That was a 'monitor interface traffic' only, just to see if
anything is being received at all. Both we and our customer
see only the outbound requests.

Thanks,
Alexander