From: Eric Dumazet <eric.dumazet@gmail.com>
To: Andy Fleming <afleming@gmail.com>
Cc: netdev@vger.kernel.org
Subject: Re: ICMP echo reply fails
Date: Fri, 26 Mar 2010 23:06:30 +0100 [thread overview]
Message-ID: <1269641190.2256.1.camel@edumazet-laptop> (raw)
In-Reply-To: <2acbd3e41003261448q26cb19d4w63487894b24f0254@mail.gmail.com>
Le vendredi 26 mars 2010 à 16:48 -0500, Andy Fleming a écrit :
> For various reasons, we have been running a stress test on one of our
> boards. The test consists of initiating 2-3 flood pings from a
> Windows box running Cygwin, plus one additional ping we use as a
> "heartbeat". The ping flood is overwhelming our board (we're dropping
> packets at a prodigious rate), but the board continues to respond for
> a while. In addition, we are running a script on the board which
> alternates bringing up and bringing down the interface every ten
> seconds. After a highly variable amount of time, the board stops
> replying to the pings. We suspected a driver issue, however, on
> closer inspection, we are still able to send and receive packets (I
> can ping *from* the board to the PC, and I can *telnet* from the PC to
> the board). We tried pinging the board from another PC, and it also
> failed. Essentially, ICMP echo requests are being ignored (A glance
> at memory indicates that packets are arriving, but no packets are
> being enqueued to the ethernet controller). We still have a lot more
> debugging to do, but I was wondering if anyone had ever seen something
> like this, or might be quicker to realize the obvious mistake we're
> making.
>
> Thanks,
> Andy Fleming
kernel version ?
NIC driver ?
Are ICMP echo request received ? (grep Icmp /proc/net/snmp)
next prev parent reply other threads:[~2010-03-26 22:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-26 21:48 ICMP echo reply fails Andy Fleming
2010-03-26 22:06 ` Eric Dumazet [this message]
2010-03-26 22:46 ` Eric Dumazet
2010-03-27 0:56 ` Andy Fleming
2010-04-02 7:09 ` [PATCH net-next-2.6] Eric Dumazet
2010-04-03 22:09 ` [PATCH net-next-2.6] icmp: Account for ICMP out errors David Miller
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