SG "freezing"

[Sergey Evsyukov]

Hello,
our network team planing large upgrade procedure with shutting network segment for significant period. Is it possible to "freeze" SG (like a Veritas HA cluster) for this time. We need to exclude cluster packets reaction when network interfaces lost connection.

[Patrick Wallek]

I would just shut the entire cluster down.

If the network is down, then I assume users can't get to the app. So there is no need for the app to be up.

[Stephen Doud · Accepted solution]

Serviceguard does not have a freeze capability.

However, if this is a 2-node cluster you can avoid the consequences of losing all heartbeat networks by doing a 'cmhaltnode -f' on one node. This will force all packages over to the other node and the remaining node will no longer be concerned with heartbeat traffic.
If packages have a dependency on a subnet that will be unavailable, the package will halt until the network comes back.