Send DNS request to specific pool member

Adding in the config as my question was being marked as spam

Virtual server config:

 ltm virtual Test123-8892 {
destination 1.1.1.1:8892
ip-protocol tcp
mask 255.255.255.255
profiles {
    fastL4 { }
}
rules {
  FQDN-pool-select
}
source 0.0.0.0/0
translate-address enabled
translate-port enabled
vs-index 170
}
`

Pool config:

`    ltm pool Test_Pool-8892-pool {
members {
    2.2.2.2:8892  {
        address 2.2.2.2
        session monitor-enabled
        state up
    }
}
monitor tcp 
`

}

`ltm pool Test_Pool_2-8892-pool {
members {
    3.3.3.3:8892 {
        address 3.3.3.3
        session monitor-enabled
        state down
    }
    4.4.4.4:8892 {
        address 4.4.4.4
        session monitor-enabled
        state up
    }
}
monitor tcp 
`

}

iRule config:

`    ltm rule FQDN-pool-select {
when HTTP_REQUEST {
if { [HTTP::host] eq "test.abc.com" } {
    pool Test_Pool-8892-pool
} 
elseif { [HTTP::host] eq "test2.def.com" } {
    pool Test_Pool_2-8892-pool
}

} }