[j-nsp] IPv6 ND stopped working

[dave o'leary]

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?

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?

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")

thanks,
                                         dave