Jaime wrote:
        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?

What make/model of NIC are you using? The only time I've ever seen this, the only thing that solved the problem was swapping the network card out for a better one. That's not to say it isn't a driver problem, as the new network card used a different driver as well.

Bill Moran
Potential Technologies

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