Applies To:Show Versions
- 11.5.9, 11.5.8, 11.5.7, 11.5.6, 11.5.5, 11.5.4, 11.5.3, 11.5.2, 11.5.1
About logging global server load-balancing decisions
When BIG-IP GTM receives a DNS query for a wide IP, in order to send a response, the system makes a load-balancing decision. The decision is based on the load-balancing method configured on the wide IP, the number of pools associated with the wide IP, and the applicable number of members in each pool.
You can send information about how GTM made the load-balancing decision to the high-speed remote logs; reviewing the logs can help determine how to fine-tune your network.
Configuring logs for global server load-balancing decisions
- On the Main tab, click The Wide IP List screen opens. .
- Click the name of the wide IP you want to modify.
- From the General Properties list, select Advanced.
For the Load-Balancing Decision Log setting, select the check boxes
of the options that you want to include in the high-speed remote logs.
Check-box option Log information Pool Selection The pool selected to answer a DNS request, and why the pool was selected. Pool Traversal The pools in the wide IP considered during the load-balancing decision, and why the pool was selected. Pool Member Selection The pool member selected to answer a DNS request, and why the member was selected. Pool Member Traversal The members of the pool considered during the load-balancing decision, and why the member was selected.