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Forum Discussion

Mariusz_B's avatar
Mariusz_B
Icon for Nimbostratus rankNimbostratus
Jan 16, 2015

GTM iRule - answering DNS based on some criteria.

Hi, I need some help with developing an iRule for DNS queries. Requirements:   check IP range a request came from (this is the easy bit which I have done already)   check monitor status -...
application delivery
devops
iRules
StephanManthey's avatar
StephanManthey
Icon for Nacreous rankNacreous
Jan 20, 2015

Hi Mariusz,

you can use a jump table (aka "switch") command to evaluate multiple conditions: 
switch [IP::remote_addr] {
"10.10.10.10" if {[LB::status vs Client_VPN_1] eq "up" } {     
      host 1.1.1.1
   } else {
      host 2.2.2.2
   }
"20.20.20.20" if {[LB::status vs Client_VPN_2] eq "up" } {     
      host 3.3.3.3
   } else {
      host 4.4.4.4
   }
}

I´m not aware of another shortcut to simplify the VS availability check.

Thanks, Stephan