[j-nsp] Odd issue with ARP in different subnet

[David Coulson]

On 3/9/11 9:04 PM, Chris Adams wrote:
> That's how I got all the info; I ran tcpdump on the Linux server and
> "monitor traffic interface me0" (which is really tcpdump) on the EX.
> Both sides see the same packets; the EX just doesn't respond to the ARP
> requests.
>
Linux does quirky stuff with ARPing by default. Try this in your 
/etc/sysctl.conf (then sysctl -p to load it).

net.ipv4.conf.bond0.arp_ignore = 1
net.ipv4.conf.bond0.arp_announce = 2

Replace bond0 with the interface facing your EX.

Docs/explanation are here:

http://kb.linuxvirtualserver.org/wiki/Using_arp_announce/arp_ignore_to_disable_ARP

David