Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

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kartheeswaran_1's avatar
kartheeswaran_1
Icon for Cirrus rankCirrus
Jul 19, 2017

IRULE FOR GTM TOPOLOGY LOADBALANCING

In bigipdns user configured a wide ip with topology load balancing with 2 existing Datacenter (US and japan). Now user needs to configure 2nd wide ip with same setup with below modification.   I...
application delivery
BIG-IP DNS
bvberkel_103040's avatar
bvberkel_103040
Icon for Nimbostratus rankNimbostratus
Aug 16, 2017

Maybe this will work for you.

gtm rule IRULE {
when DNS_REQUEST {
  if { [ matchregion ldns Banglore ] } {
    pool Banglore-pool
  } elseif { [ matchregion ldns Hyderabad ] } {
    pool Hyderabad-pool
  } elseif { [ matchregion ldns Singapore ] } {
    pool Singapore-pool
  } else {
    pool US_Asia-pool
  }
}

create gtm region Banglore { region-members add { subnet x.x.x.x/32 } } 
create gtm region Hyderabad { region-members add { subnet x.x.x.x/32 } } 
create gtm region Singapore { region-members add { subnet x.x.x.x/32 } }

x.x.x.x is the LDNS for each region/country

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