Messages in this thread | | | Date | Tue, 23 Jul 2002 18:06:58 -0400 (EDT) | From | Bill Davidsen <> | Subject | Re: [BUG?] unwanted proxy arp in 2.4.19-pre10 |
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On Sun, 14 Jul 2002, Julian Anastasov wrote:
> Start with fixing your picture (all hubs and wires, please). > Linux ARP never sends 1 broadcasts through 2 devices, so it seems there is > a hub near Node_A (or Node_A is running bridging), I can't believe 230.1 > and 230.4 are directly connected with cross cable. Make sure you have > the needed host/subnet routes for each interface. Also, make > sure tcpdump really shows the ARP replies, make the tests with > arp -d IP ; ping -c 1 IP
The tests were made with a copy of tcpdump on every NIC of every machine involved, with a hardware sniffer on each of the NICs. It was analyzed by ISP network gurus, and it appears that it really does happen, and both D-Link and Cisco switches don't like it when it does.
The problem was solved by substituting a more capable node.
Since I'm told by network people that current behaviour is the desired behaviour, by definition there is no bug. By a mixture of diddling flags in /proc/sys and hand routing every address through the desired NIC you can make it work, so "no problem."
-- bill davidsen <davidsen@tmr.com> CTO, TMR Associates, Inc Doing interesting things with little computers since 1979.
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