Sharing the load: Address pools

Your users have bookmarked your $webserver, load goes up.

Solution: more servers and a redirection

table webpool persist { 192.0.2.214, 192.0.2.215, 192.0.2.216, 192.0.2.217 }

match in on $ext_if to $webserver port $webports rdr-to <webpool> round-robin

Pre-4.7:

rdr on $ext_if from any to $webserver port $webports -> <webpool> \
       round-robin sticky-address