ARP problems
From time to time my network dies. Most of the time I have two
machines on it and the symptom is that they cannot ping each other
anymore. At the same time I see that all that a ping triggers is an arp
packet. Here's a typical tcpdump trace:
11:16:52.909161 amboise > 192.168.1.255: icmp: echo request
11:16:53.936272 amboise > 192.168.1.255: icmp: echo request
11:16:54.936322 amboise > 192.168.1.255: icmp: echo request
11:16:59.247968 arp who-has oleron tell amboise
11:17:00.246100 arp who-has oleron tell amboise
11:17:01.246096 arp who-has oleron tell amboise
11:17:02.266239 arp who-has oleron tell amboise
11:17:03.266105 arp who-has oleron tell amboise
11:17:04.266085 arp who-has oleron tell amboise
11:17:05.286220 arp who-has oleron tell amboise
11:17:06.286096 arp who-has oleron tell amboise
11:17:07.286088 arp who-has oleron tell amboise
11:17:08.306238 arp who-has oleron tell amboise
11:17:09.306087 arp who-has oleron tell amboise
11:17:10.306080 arp who-has oleron tell amboise
11:17:23.592631 arp who-has oleron tell amboise
11:17:23.592900 arp reply oleron is-at 0:a0:24:ff:e5:ab
11:17:23.592935 amboise > oleron: icmp: echo request
11:17:23.593267 oleron > amboise: icmp: echo reply
11:17:24.646275 amboise > oleron: icmp: echo request
11:17:24.646652 oleron > amboise: icmp: echo reply
There must be something wrong on my desktop because:
- the only way I have found to fix this is to unplug its RJ45 ethernet
cable from the switch and replug it.
- other machines can still ping each other (when there's actually more
than one 'other machine' on the network)
* desktop
kernel 2.2.17
3c59x
it's also the DHCP server
* switch
In the middle I have a small Unicom MiniSwitch/5.
* laptop
kernel 2.4.0test9 / windows 98, it happens with both
currently with a 3c589_cs but I had the same problem with a linksys
PCMPC100 (now dead, broken dongle)
Does anyone know what could be wrong?
--
Francois Gouget fgouget@free.fr http://fgouget.free.fr/
War doesn't determine who's right. War determines who's left.
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