[strongSwan] High availability failover problem

[Martin Willi]

Hi,

> Is it essential for both nodes to receive all the ESP packets?

Yes.

> Cannot be ESP sequence numbers synchronized through the HA plugin?

No, this is not how the HA plugin works. ESP sequence numbers move very
fast, making a synchronization in userland difficult.

You may try to synchronize sequence numbers by other means, but we don't
provide any solution beyond our ClusterIP patches.

Regards
Martin