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Shaker_347973's avatar
Shaker_347973
Icon for Nimbostratus rankNimbostratus
May 18, 2018

GTM load balancing based on source IPv6

I have an irule to balance DNS request based on even/odd last octe4t of the IPv4 address. when DNS_REQUEST { log local0. "GTM LOGGING: DNS request matching test.com [IP::remote_addr] - QUEST...
BIG-IP DNS
iRules
security
Niels_van_Sluis's avatar
Niels_van_Sluis
Icon for MVP rankMVP
May 18, 2018

Something like this:

when DNS_REQUEST {
    log local0. "GTM LOGGING: DNS request matching test.com  [IP::remote_addr] - QUESTION:[DNS::question name], [DNS::question type]"
    set ipaddress [lindex [split [IP::client_addr] "%"] 0]
    set last [lindex [split $ipaddress ":"] 7]
    set lastdec [expr 0x$last]
    log local0. "8th hextet $last ($lastdec)"
    if { ( $lastdec%2 ) } { set destination "odd" } else { set destination "even" }
    if {$destination equals "even"} {
        pool pool1
    }
    else {
        pool pool2
    }
}