ping: sendto: No buffer space available

Jaime jaime at
Tue Jun 17 05:15:41 PDT 2003

	I've been noticing for a few days that my network's performance is
less than good.  When I checked on it, I found that the firewall
attempting to ping the ISP's DNS resolver would have "hiccups."  The ISP
claims that there is nothing wrong on the T-1 line and that there is a
problem on the ethernet interface of the router (which leads to the

	The pings will run just fine for several minutes at a time and
then begin to output this:

ping: sendto: No buffer space available

	This will go on for anywhere from 15 seconds to 5 minutes, during
which we're effectively not connected to the Internet at all.  An
occasional ping will work, but only about 1 in 20 and it seems random.
Then, just as suddenly, the connection will work again.

	I'm not completely sure what this means, but I found the following
command in the mailing list archives:

cerberus# sysctl -a | grep intr_qu
net.inet.ip.intr_queue_maxlen: 50
net.inet.ip.intr_queue_drops: 6987

	Does anyone have any suggestions or tips?

							Thanks in advance,

"To affect the quality of the day, that is the highest of arts."
 - Henry David Thoreau, _Where_I_Live_

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