FQDN Node with Route Domains

had to work on this with a customer of mine yesterday... we came up with the following irule to deal with it..

when RULE_INIT {
    set static::TESTdebug 1
    set static::TESTfqdn_pool TEST_snf_uat_22_pool
}

when CLIENT_ACCEPTED {
    # Only apply this logic to TCP port 22 (SFTP)
    if { [TCP::local_port] == 22 } {
        # Check if client IP Address is in the Data Group (BBDMS_SNF_Parallel_DG)
        if { [class match [IP::client_addr] equals BBDMS_SNF_Parallel_DG] } {

            # Get the list of active pool members
            set members [active_members -list $static::TESTfqdn_pool]
            set member_count [llength $members]

            if { $member_count >= 1 } {
                # Loop through pool members using a dynamic index
                if {[info exists static::poolndx]} {
                    # Increment index and loop back if necessary
                    set static::poolndx [expr ($static::poolndx + 1) % $member_count]
                } else {
                    # Initialize the pool index on the first use
                    set static::poolndx 0
                }
                # Select the member based on the index
                set membaddr [lindex [lindex $members $static::poolndx] 0]
                # Log selected member (for debugging)
                if { $static::TESTdebug > 0 } {
                    log local0. "Selected pool member: $membaddr%1549 port 22"
                }
                # Assign traffic to the selected node
                node $membaddr%1549 22
            } else {
                # No active members in the pool; optionally handle this case
                log local0. "No active members in pool $static::TESTfqdn_pool"
                reject
            }
        } else {
            # Fallback to default pool
            pool CBM_SFTP.f5.com_22_pool
        }
    }
}