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Rohit_Singla_17's avatar
Rohit_Singla_17
Icon for Nimbostratus rankNimbostratus
Sep 22, 2017

GTM Topology Records

Hi Experts, I am having some confusion on the longest match option of GTM. What is the use of this longest match option, if GTM has to check all the records, even wildcard record and then finally decide based on the weight/score. So what i found from the gtm guide and f5 articles is that,

 

if i have 2 topology records, one is specific and other is wildcard, both having same weight, GTM is going to to Round Robin because they have same weight.....

 

if the wildcard has higher weight, wildcard record will be selected, even when a specific record is present.

 

So what is the longest match doing here. what is the real use of it...Anyone?

 

application delivery
BIG-IP
BIG-IP DNS
big-ip gtm
longest match
security
topology record
  • Vijay_E's avatar
    Vijay_E
    Icon for Cirrus rankCirrus
    Sep 25, 2017

    See if this blog makes sense. I have never been a fan of Topology records and prefer to use an iRule to pick the right pool since there isn't good documentation to explain the functioning.