When a DNS query is received for the GSLB service and the member configured with an FQDN is selected, NSX Advanced Load Balancer responds with a CNAME response, pointing to the FQDN of the pool member. The resolver must fully resolve the query by performing another lookup for the returned FQDN.

NSX Advanced Load Balancer can also add an A record in the response along with the CNAME response.

Activating Resolve CNAME Using UI

  1. Navigate to Applications > GSLB Services.

  2. Click Create and select Advanced Setup.

  3. Under GSLB Pools section, select the Resolve CNAME check box.



  4. Fill in other fields and click Save.

Activating Resolve CNAME Using CLI

Log into the NSX Advanced Load Balancer CLI and use the resolve_cname flag under configure gslbservice mode to activate or deactivate a record addition for a CNAME query.

[admin:ctlr-1]: > configure gslbservice <gslb service name
[admin:ctlr-1]: gslbservice> resolve_cname

To deactivate, use the no resolve_cname flag.

[admin:ctlr-1]: gslbservice> no resolve_cname
Note:

If the GSLB pool member FQDN maps to multiple IP addresses, only one of them is picked by the NSX Advanced Load Balancer.