# Load balancing based on iRule

iRule configuration

when CLIENT_ACCEPTED {

  set mypool   "foobar"
  set client_1 "1.1.1.1"
  set client_2 "1.1.1.2"
  set server_1 "2.2.2.1"
  set server_2 "2.2.2.2"

  if { [IP::client_addr] eq $client_1 } then {
    if { [LB::status pool $mypool member $server_1] eq "up" } then {
      pool $mypool member $server_1
    } else {
      pool $mypool member $server_2
    }
  } elseif { [IP::client_addr] eq $client_2 } then {
    if { [LB::status pool $mypool member $server_2] eq "up" } then {
      pool $mypool member $server_2
    } else {
      pool $mypool member $server_1
    }
  } else {
    persist uie "[IP::client_addr]"
    pool $mypool
  }
}

References

https://devcentral.f5.com/irules