On 21/09/11 16:31, Jim Pingle wrote:
On 9/21/2011 9:55 AM, David Brown wrote:
Just to confirm what I'm looking for here, I would want to switch over
to the secondary if any of the NICs on the main system failed, or if the
main system itself failed. But it should not switch if interfaces such
as the VPNs fail.
Realistically, it is probably the router computer itself (disk, cpu fan,
power supply) that will fail rather than the NICs.
The only interfaces that can trigger a failover are those with CARP VIPs
configured upon them. If one interface with a CARP VIP goes down, the
backup will take over all of the CARP VIPs.
Relating that behavior to the NIC is not 100% correct really, since it's
actually the CARP VIPs that go up/down and thus triggering the failover
to the other box since all traffic should be flowing through the CARP VIPs.
Anything that is tied specifically to one box or the other would not be
affected by the failover, which is why everything should be using CARP
VIPs for the gateway, outbound NAT, services, etc.
That makes a lot of sense. Thanks.
David
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