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

Forum Discussion

Marwan_119032's avatar
Marwan_119032
Icon for Nimbostratus rankNimbostratus
Jul 28, 2015

How to change TTL time

I would like help on how to change TTL inGTM version 11.4.1 Thanks  
Samir_Jha_52506's avatar
Samir_Jha_52506
Icon for Noctilucent rankNoctilucent
Jul 29, 2015

Hi, There are two TTL object in GTM. You can change TTL value based on requirement.

  1. You will find TTL object while configuring Pool.(default TTL value 30Sec).

  2. The system uses the value of the Time to Live (TTL) field in the DNS record, and the 

    max-cache-ttl
    statement in the BIND configuration file, to determine the time frame that the records remain in the cache. Link

                DNS-->Zones-->ZoneRunner-->named Configuration.
            example: max-cache-ttl 90;

Hope it will work.

  • Marwan_119032's avatar
    Marwan_119032
    Icon for Nimbostratus rankNimbostratus
    Jul 29, 2015
    Thank you Samir, In the UI when I login and go to Zones-->ZoneRunner-->named ConfigurationI do not see max-cache-ttl, I just see TTL. Is this in the GUI or I need to SSH into the unit? If i go to DNZ there is no Zones under that menu in version 11.4.1. Thanks.