F5 refers to an FQDN as a “wide-ip”, or “wip”. The Wide IP maps a FQDN (fully qualified domain name) to one or more pools of virtual servers. For more information on Wide IPs, please refer to the link below.

More information on Wide IPs

On gtm1.site1 navigate to: DNS ›› GSLB : Wide IPs : Wide IP List


Create an F5 “wide IP” according to the following table:

Field Value
Name www.example.com
Type A
Alias List www.gslb.example.com
Load-Balancing Decision Log - Pool Selection Checked
Load-Balancing Decision Log - Pool Traversal Checked
Load-Balancing Decision Log - Pool Member Selection Checked
Load-Balancing Decision Log - Pool Member Traversal Checked
Pool www.example.com_pool

TMSH command to run on only gtm1.site1:


tmsh create gtm wideip a www.example.com { pools add { www.example.com_pool } aliases add { www.gslb.example.com } load-balancing-decision-log-verbosity { pool-member-selection pool-member-traversal pool-selection pool-traversal } }


Use the “dig” command to query directly to the GTM to test the configuration. DIG will bypass locally configured DNS servers when specifying an “@” argument.

From the Jumpbox use “dig” from the CMD prompt. The first command below will query for the A record of www.example.com, then query @ for www.gslb.example.com.


Your result may differ from below


On gtm1.site1 view statistics


For more details click "View"



tmsh show gtm wideip A www.example.com detail



tail -f /var/log/ltm