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On Tue, Sep 27, 2005 at 10:18:28AM +0200, Jan Klopper wrote:
> Horms,
>
> I tried messing about with the -arp flag on ifconfig eth1, but that
> pretty much took the entire interface down.
> As expected the failover server saw this hapening, and took over the VIP.
The -arp flag probably isn't what you want here.
> Changing it back to ifconfig eth1 arp, restored the link, but the
> secundary server kept the ip.
>
> Setting net.ipv4.conf.eth1.arp_ignore = 1
> in /etc/sysctl.conf, didn't do much different. it took the the internal
> ip down again.
> And removing it put the ip back online.
>
> How should i have done this exactly?
> I read:
> http://www.ultramonkey.org/3/topologies/sl-ha-lb-eg.html
> And figured out that i would go with the debian way of things, altough
> im on gentoo.
>
> eth0 should abviously arp for the VIP, but doesn't, eth1 does so, but
> shouldn't. eth1 should only arp for its internal ip. (so setting -arp on
> eth1 doesn;t do the trick)
>
> Setting
>
> # When an arp request is received on eth0, only respond if that address is
> # configured on eth0. In particular, do not respond if the address is
> # configured on lo
> net.ipv4.conf.eth0.arp_ignore = 1
>
>
>
> tells me i could add this to eth1 to make it ignore arps for the VIP,
> since its not bound to eth1.
>
> any more help? (don't want to tinker about all too much since i can have
> the machine go dark on me, its colocated)
If the VIP is on eth0, and you don't want it advertised ovr ARP on
eth1, then set:
net.ipv4.conf.eth1.arp_ignore = 1
net.ipv4.conf.eth1.arp_announce = 2
--
Horms
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