Date: Mon, 16 Jun 1997 21:20:03 -0700 (PDT) From: David Greenman <dg@root.com> To: freebsd-bugs Subject: Re: kern/3887: fxp problems Message-ID: <199706170420.VAA21747@hub.freebsd.org>
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The following reply was made to PR kern/3887; it has been noted by GNATS.
From: David Greenman <dg@root.com>
To: root@blip.cetlink.net
Cc: FreeBSD-gnats-submit@FreeBSD.ORG
Subject: Re: kern/3887: fxp problems
Date: Mon, 16 Jun 1997 21:19:16 -0700
>>Description:
>
> After running for anywhere from 12 hours to 2 days, the ethernet
>card becomes unresponsive to any packets. The server continues to operate
>though attempting to send or receive any packets fails. Netstat -nr shows
>default route as well as the aliases. Netstat -na shows usually an address
>bound to port 80 of one of the virtual webservers with a state of LAST_ACK.
>Rebooting the machine returns all network functions to a normal state.
>
>>How-To-Repeat:
>
> Probably sufficient to use an fxp device with multiple aliases
>bound to the controller. This seems to exist now on two seperate machines.
>The second machine ran without a single problem until I bound a couple of
>aliases. The symtoms are identical to the first server.
>
>>Fix:
>
> Disabling aliases causes the problems to go away.
The problem could be caused by a variety of things. One cause of something
like this is running out of mbuf clusters. You might get a "Out of mbuf
clusters - increase maxusers!" message in your /var/log/messages. You can
increase the maximum number of mbuf clusters with the NMBCLUSTERS kernel
option (see the mailing list archives). Another possible cause of this could
be a bug in the 82557 NIC; the receiver goes dead when getting garbage on the
wire. If you can "ifconfig fxp0 dowm; ifconfig fxp0 up" to clear the problem,
then this might be the cause. Let me know if you determine anything further
on this problem.
-DG
David Greenman
Core-team/Principal Architect, The FreeBSD Project
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