John MacLerran wrote
>
> I have a strange HP3000 and NS/VT problem.
>
> At various times over the last week or so, NS appears to
> 'hang'.  If we try
> to connect with Reflection, we get a timeout and can't
> connect.  People who
> are already logged in can continue working, sometimes, --
> sometimes they get
> disconnected and then cannot reconnect. Doing an NSCONTROL
> STOP to shut down
> NS and then an NSCONTROL START to bring NS back up usually solves the
> problem, but it disconnects all the NS sessions and forces
> them to reconnect.
>
> We've been running a sniffer on the network, to see if anything is
> generating a bunch of bizarre packets that could be cofusing
> NS, but we
> haven't seen anything, but that could be because we don't
> know exactly what
> to look for.
>
> We're running MPE 7.0 express 1 on an 2-way 440Mhz N4000. SOS
> doesn't show
> anything taking up an inordinate amount of resources, and I
> can connect via
> Telnet fine during the episodes.
>
> Has anyone else heard of anything like this, or have any idea
> of how we can
> troubleshoot it more completely?
>

Others have already given good troubleshooting advice so I will not repeat
it. I have, however, seen similar symptoms when the network was being
flooded by a large number of multicasts (which will show up in the
LINKCONTROL data).

John

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* John Burke                                              *
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