a question for my understanding...

We a have some 2-node-clusters, the nodes are separated in different
buldings, which means there is a central switch in between. If there is a
planed reboot of the switch I do a 'cluster maintenance on' - but I'm still
not sure if this is necessary?

No network communication between the to nodes -> no heartbeat -> one of them
needs to die - is it really that simple? Aren't there more sophisticated
ways to determine a cluster hosts isolation?

(The KB has references to a TID 10053882 - Gory details of Heartbeats, Split
Brains and Poison Pills - but this document is not available....)