In article <Pine.NEB.4.61.0510211713550.3703@ugly.precedence.co.uk>,
Stephen Borrill  <netbsd@precedence.co.uk> wrote:
>My 3.0_BETA i386 box with i82550 network (fxp0) occasionally panics. When 
>it does so, the port light on my switch flashes like mad and the whole 
>network grinds to a halt.
>
>trace says (from handwritten notes):
>
>kernel: page fault trap code=0
>Stopped at netbsd:llcintr+0xcc: movzbl 0x2(%edi),%eax
>llcintr(x0f98e00,c01022cd,c0f98e00,c0102bde,4a360010) at netbsd:llcintr+0xcc
>ccitintr(4a360010,20030,27bc0010,10,c08f4000) at netbsd:ccittintr+0x35
>DDB lost frame for netbsd:Xsoftnet+0x82 trying 0xc08f7e80
>Xsoftnet() at netbsd:Xsoftnet+0x82
>--- interrupt ---
>0x240:
>
>As soon as I type reboot, the network starts working again. Last time it 
>died, I tried tcpdumping on another machine, but didn't see anything.
>
>This machine's been running 1.6 for years without any downtime.
>

Looks like a bug in netccitt. Compile a kernel without it. Can you
put the kernel and a dump somewhere?

christos