chained packet panic on DEQNA (uvaxII) ?

[Brian V. Smith]

In article <8147 at boring.cwi.nl>, jack at cwi.nl (Jack Jansen) writes:

> In article <2717 at helios.ee.lbl.gov> envbvs at epb2.lbl.gov (Brian V. Smith) writes:
> >We are crashing on our Microvax II with a DEQNA with the panic message
> >"qe: chained packet".
> >
> Well, you could at least have told us which OS you run, and which
> version........
> 

Sorry.  Ultrix 2.0-1.  BUT, in three years since it has been running 
it has not ever given that error.

> Anyway, the problem is probably that there are packets coming in
> that are longer than one receive buffer (and, thus, get chained into
> the next buffer) and your software can't handle this. Depending on
> your OS, you might be able to extend the size of the recieve buffers.
> 

I suspect that some other host is sending large packets that is making
our machine panic.  Do you know how to extend the size of the receive 
buffers on Ultrix 2.x or Ultrix 3.0 (which we will be installing anyway)?

> Another (hacky) solution is to set the 'mtu' of all systems on
> the net to a value lower than your uVax-II buffer size.

You're not serious!  There are several hundered machines on the LBL net.

_____________________________________
Brian V. Smith    (bvsmith at lbl.gov)
Lawrence Berkeley Laboratory
We don't need no signatures!