8.1 bridge locking up

[Aragon Gouveia]

Hi,

I have a FreeBSD 8.1-RELEASE-p1 system configured with two bridge 
interfaces.  Every few hours or days the system stops responding or 
locks up.  This is a system that had been running without problems 
before I upgraded it from a year old 8.0-STABLE a week ago.

Most times when it locks up it still responds to pings.  Some times I 
can still SSH to it, but otherwise I have to get on via console and 
reboot it.  Almost all traffic destined to it or originated from it 
travels through an if_bridge(4) interface.

Today I was able to use top to see the state of processes that are hanging:

> 70232 root        1 116   20  5668K  3232K *lle     0:00  0.00% snmpget
> 70235 root        1 116   20  5668K  3232K *if_af   0:00  0.00% snmpget
> 70244 root        1 116   20  5668K  3220K *if_af   0:00  0.00% snmpget
> 70245 root        1 116   20  5668K  3220K *if_af   0:00  0.00% snmpget
> 70254 root        1 116   20  5668K  3220K *if_af   0:00  0.00% snmpget
> 70306 root        1  96    0  3416K  1112K *if_af   0:00  0.00% ifconfig
> 70296 root        1  96    0  3392K  1132K *if_af   0:00  0.00% ping

The ping and ifconfig processes were started by me and couldn't be 
backgrounded or interrupted while in the above state.  Today it's as if 
only one of the bridge interfaces had "crashed" since traffic through 
the other bridge interface was behaving fine.

Really need to get to the bottom of this.  Help?


Thanks,
Aragon