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JRahm's avatar
JRahm
Icon for Admin rankAdmin
Jun 01, 2007

Disabling GTM Persistence selectively

We have a few cases for an internal application where a great number of clients will be hitting GTM via delegation, which means that all users requesting from each delegation will be persisted accordingly. We want the persistence on each wideIP , but not for everyone. Is there an alternative to the persist command that will achieve this desired behavior? In the rule below, I am attempting to not persist if the requests are from a couple subnets, however, I get an error.

01070151:3: Rule [nopersist] error:

 

line 4: [undefined procedure: persist] [persist none ]


when DNS_REQUEST {
  if {[IP::addr [IP::client_addr] equals 10.1.1.0/24] or \
       [IP::addr [IP::client_addr] equals 10.2.1.0/24]}{
         persist none 
  }
}
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  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Jun 01, 2007
    OK, I'll give myself a big fat RTFM:

    ttl Overrides the default time-to-live value. Overrides the default time-to-live value. If this command is used for a CNAME, the value overrides the default of 0. If this command is used for a pool, the value overrides the time-to-live value for that pool.

    
when DNS_REQUEST {
  if { [IP::addr [IP::client_addr]/24 equals "10.1.1.0"] \
    or [IP::addr [IP::client_addr]/24 equals "10.2.1.0"] } {
      ttl 0
  }
}

    At the wideIP level, I presume this means persistence, and at the pool level, I presume this means the actual TTL. How do I ensure this is applied at the wideIP level?

    ....unsolicitated commentary to follow...

    Could something other than TTL have been selected as a nomenclature for persistence on the GTM?
  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Jun 01, 2007
    The rule as written in the previous post resets the defined dns ttl of 600 to 0, so this is not what I wanted. Any ideas?

     

  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Jun 08, 2007
    I have opened case C358989 with support on this problem, tech.out is attached to the case. Thanks.
  • Haarith_Devaraj's avatar
    Haarith_Devaraj
    Icon for Nimbostratus rankNimbostratus
    Mar 19, 2009
    Hi Elah,

     

     

    We are dealing with some crawlers which we didnt want to redirect with a CNAME. Persist none would be ideal. Was curios if you got a resolution on that case. ( we are version 9.4.6 ).

     

    Also is it possible to do a class lookup rather than a nested if.

     

     

    Thanks,

     

    Haarith
  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    May 13, 2009
    In version 10, there is now a persist disable command that should eliminate the CNAME requirement for this solution.