Changing destination pool TCP port via iRules

It's been quite a while since this was answered, but I had a similar requirement recently and came across this.

Using the

LB::reselect

seemed like a good choice for us, however the above suggested solution doesn't work since the destination port cannot be specified when calling

LB::reselect pool

But it can be specified when calling

LB::reselect node

, like so:

when LB_SELECTED {
  if { $new_dport != 0 } {
    LB::reselect node [LB::server addr] $new_dport
  }
}

The value of

new_dport

is set in

CLIENT_ACCEPTED

block (and defaults to 0, i.e. should not be changed).

Just wanted to share, in case someone finds it useful.