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From: "Alessandro" <garcol@postino.it>
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Date: Mon, 2 Apr 2007 08:49:17 +0200
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Subject: FreeBSD-6.1 reboots due to high mbufs 
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Hi,

I think the tcp connections remain in ESTABLISHED for a long time, it =
can depend from satellite link (high delay) or a problem with TCP timing =
in 6.1.  (The hardware configurations is the same of 4.x box?)

First of all you can try to set:
sysctl net.inet.tcp.inflight.enable=3D0
and then:
sysctl net.isr.direct=3D0
sysctl net.inet.tcp.slowstart_flightsize=3D4 or more


Can you upgrade FreeBSD?=20
Can you run a "systat -vm 1" and "top"?
If you run netstat -in no errors are report?

If there are a lot of connections a lot of nmbclusters are used, you can =
run=20
"netstat -na | grep ESTAB | wc -l".
The number of nmbcluster used is related with the number of connections.

Let me know.
Regards
Alessandro