> Was trying to upgrade a remote NIC in-flight from a (fixed) 10BASE-T FD
> to (fixed) 100BASE-T FD; on a Cisco switch with fixed rates:
> 
> # ifconfig xl0 media 100baseTX mediaopt full-duplex
> 
> This is what I issued, then nothing more came up on my remote terminal
> (ssh). Last resort: Had to drive a few kms to remote server room.
> My 3.7 was simply frozen. No local keyboard access; no other term, no answer 
> from
> NIC; no dump. 'Frozen' at its best.
> 
 
Same thing happend to me on 3.7 release, the positive thing was I only had to
drive, ah walk, into my basement ;)

I later on found out (after many trips down the stairs ) that a ram was going
really bad (as in seqfault in random places), but I also changed my NIC during
my search for the bad hardware in my box.

My GUESS is that the problem is with the 'xl' 3.7 release driver because I
didn't have the problem since using a real NIC (fxp) an not a piece of junk
(sorry but did some testing with xl -> crap ).
 
> Of course, no chance here to try to reproduce the matter.
> But a hint how to avoid it next time would be welcome,
> 

As written above dump the nic or if that is not a choice leave the media setting
at 'auto'.

mfg
ahb

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