Linux + Dual redundancy

[Kevin Darcy]

Dave wrote:

> Hey,
>
> I just set my server up across 2 lines from different ISP's so that I have
> redundancy, but for some reason whenever I bring up the second line (ifup
> eth1) my system appears to stop accepting or replying to connections on the
> other ip address. As in eth0 is up running on ip address: 24.64.187.57
> then i do 'ifup eth1' and i get my static ip of: 142.179.151.158 then it
> appears to stop accecpting connections on the 24 ip and only ones on the 142
> ip address.
>
> So my question is will my DNS respond on any available IP address that my
> system has?

It will, but it only scans the interfaces periodically (default is 60 minutes),
so it may take a while for it to notice that the other interface is up. You can
of course restart the nameserver to force this. Or, you could increase the
frequency of interface scans by tuning the interface-interval option.


- Kevin