tcp/ip failures with fbsd 8.2 386 on ESX 4.1
Ggatten at waddell.com
Sat Mar 19 22:47:31 UTC 2011
Maybe try disabling dns lookups within syslog-ng?
----- Original Message -----
From: Len Conrad [mailto:LConrad at Go2France.com]
Sent: Saturday, March 19, 2011 05:40 PM
To: freebsd-questions at freebsd.org <freebsd-questions at freebsd.org>
Subject: tcp/ip failures with fbsd 8.2 386 on ESX 4.1
FreeBSD 8.2 32-bit
em0 driver to the ESXi Intel emulation
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
inet a.b.c.85 netmask 0xffffffe0 broadcast a.b.c.95
media: Ethernet autoselect (1000baseT <full-duplex>)
We've be running FreeBSD 7.x for a couple of years on ESXi 4.0 and 4.1 with no problems.
We're having tcp/ip failures with 8.2 as syslog-ng server. trafshow shows aggregate port 514 traffic hitting peaks of about 25K char/sec.
After sometimes many hours of the syslog-ng VM server running well,
monit from other machines signals port 514 is down, up, down, up.
this is confirmed by other machines with
nmap a.b.c.d -p 514 -sU
... showing closed, open, closed, etc.
syslog-ng logging for all syslog clients stops more or less simultaneously.
trafshow filtered for port 514 shows udp packets arriving, but instead of showing the source and destinations by PTR domain name, it switches to showing their IPs.
to test the external DNS, on the syslog-ng VM, we try
dig @recursive.server -x a.b.c.d
and get no response. Other machines query the recursive server successfully.
Without rebooting the FreeBSD VM, we do
which allows full operation.
dmesg and messages show no errors.
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