Pfsync: crossover or switch?

[Derelict]

Is it considered best practice to use a couple switch ports on a blank VLAN or a crossover cable for pfsync given only two failover nodes?

[jimp]

Either way is fine. Over the years we've found some NICs can be picky about direct connections so a switch can sometimes be more stable, but generally speaking a simple crossover is fine unless you have issues with it.

[KOM]

I've set up replicating SANs before and I've always just used a crossover cable for the synchronization interface.  I don't trust another piece of electronic equipment in the mix for no reason, and I've never had a problem with direct-connected interfaces.