fxp going quiescent in current

[Randy Bush]

> FreeBSD rip.psg.com 7.0-CURRENT FreeBSD 7.0-CURRENT #3: Sat Nov 11 19:18:23 GMT 2006     root at rip.psg.com:/usr/obj/usr/src/sys/RIP  i386
> 
> and for the last four or five days, fxp0 goes dead.  it shows up
> and active, but no packets move.
> 
> down/up does not help.  only way out has been reboot.
> 
> suggestions on how to debug?

this is killing me.  noc woke me up twice in night to reboot the
sucker.  any clues?

randy