I assume the only thing is that you cannot guarantee that the traffic that is meant to come in via the service IP really comes through the 'service' adapter and vice versa - it will rather be random....
The redbook says:
For IPAT via aliases,
All base IP addresses on a node must be on separate subnets (if heartbeat
monitoring over IP aliases is not used).
All Service IP addresses must be on a...
Depends on how many physical network connections do you have, which hacmp version and do you want to use IP aliasing or not.
If you only have one adapter (or a pair of adapters setup with...