more NetGear mising ARPs
William J. Earl
Mon May 24 12:12:17 1999
Neale Banks writes:
> With 2.0.36 and tulip.c:v0.89H on a not-so-slow machine (349.80 bogomips)
> I appear to be bumping into this problem :-(
> Originally this machine was happily working, plugged in to a NetGear
> 10/100 "hub" (IIRC, a DS516) on a busyish network. The machine was moved
> to a 10Mb hub on a _quiet_ subnet and now has missing-arp problems - worse
> with the Cisco 25xx which is the gateway on this subnet (the other linux
> box on the subnet is OK if you first arp from that, with the Cisco it's
> much less inclined to talk (even with attempting to talk from the Cisco)).
This is pretty much exactly the symptoms I have been seeing: the
NetGear card does not deliver the ARP replies to the driver, even though
they definitely are on the wire. v0.91 (4/14/99) did not make any difference
in this problem for my card, although it did cure cases of the system hanging
with interrupts disabled (presumably in the driver). I am running with an
> Turning debug up to three didn't produce anything obviously "interesting"
> (but the first time I booted with debug=3 the arp to the Cisco worked,
> subsequent tests suggest this may have been a fluke).
debug=4 does not turn up anything else. The ARP will work randomly
to "problem" hosts. The percentage of success for various problem hosts
can vary widely; I have seen 50% and under %1 for various hosts.