SG - can your network failover to a SPECIFIC network card?

[Mark Graham]

We have a four port lan PCI, the first is a 178 nework and the third is a 179 network. If the first network fails, we want it to fail to the second port and if the third fails, we want it to fail over to the fourth network. Does anyone know if we can do that in service guard and how you do that?

[Craig Gilmore]

Yes, you can configure this. In the ServiceGuard configuration you specify the Primary and Standby lan cards by the PPA (lan1, lan3, lan0, lan2) not by IP address. This would be defined in the cluster creation.

[Mark Graham]

That is great news! DO you happen to have an example config file that you can pass on to us? We would appreciate it.

[Stephen Doud]

Hi Mark,

ServiceGuard will not support more than one standby LAN per physical network.

It does support standby LAN for multiple subnet cards on the same LAN.

For example, say lan0 and lan1 were attached to the same physical network, but were talking on different subnets. standby lan2 would be able to stand-in for either lan0 or lan1 should one of them fail.

There is no way to specify alternate standby LANs in ServiceGuard.

That said, perhaps you would be interested in autoport aggregation - multiple LAN cards listening to the same IP. In effect, any of the aggragated LAN ports will handle the traffic, even if one port dies.

[Mark Graham]

Stephen:) Thanks for the info but I'm even more confused now. How would I set this up in Service Guard's cluster config file? We have four port cards, 1&2 are on the same physical network and 3&4 are on another network and the heartbeat is on another network since this is just a two node cluster. Are you saying that if 1 fails that 2 will automatically pick it up? Please give as much info as you have since we have to configure this shortly.
Thanks!