Pfsync: crossover or switch?
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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?
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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.
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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.
