[TAG] Weird networking question

René Pfeiffer lynx at luchs.at
Fri Mar 19 17:33:52 MSK 2010


On Mar 19, 2010 at 1125 -0300, Deividson Okopnik appeared and said:
> 2010/3/19 Ren? Pfeiffer <lynx at luchs.at>:
> > [...]
> > You could try using something like this:
> > ip route del default
> > ip route add default via 192.168.0.x dev eth0
> >
> 
> Did that, still doesnt work (after a network restart) - it seems to
> work as i want when i disable eth1 (but of course then apache and
> mysql = unresponsible)

Mind the ARP settings. The Linux kernel answers to ARP requests on both
interfaces (as was pointed out by a previous posting). The behaviour is
called "ARP flux".

http://lwn.net/Articles/45373/
http://robertlathanh.com/2009/08/two-subnetworks-on-one-lan-and-linux-arp_filter/

The last link explains the arp_filter settings a bit more.

> Thanks a ton :)
> Wow, youre fast.

Recharging my caffeine levels after 5 days of being away from the office
coffee machine. ;)

Best,
Ren?.
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