I'm looking for a procedure (high level action plan) to migrate a 'simple' ClusterXL HA cluster (one Smart-1 and two members in Active/Standby) to new hardware (and preferably also upgrade from R81.10 to R81.20 at the same time), using a zero-downtime (hence: stateful) migration/upgrade.
The old hardware consists of two SG5600 appliances. The new hardware consists of two SG6400 appliances. Besides the management interface, both environments will be connected using two 10 Gbit/s SR fiber connections (per appliance) using the built-in 4x10G adapter card.
Of course I can simply build the new cluster on the new hardware and then disconnect network interfaces from the old cluster, connect the new cluster to the network, force some gARPs, and test. But that will be a non-stateful 'failover' to the new cluster.
Is it possible to perform such a zero-downtime upgrading/migrating to new hardware with Check Point? I think the major challenge is that at some point in the process you have a cluster consisting of one SG5600 and one SG6400. That's probably not supported (or might not even work).