SoapUI executing standard DNS query every 30 seconds

Dear all,

I have few load tests defined with 300 requests per second and the server application is hosted on multiple nodes. Load is balanced using an external load balancer.

When I run wireshark, I can see that the standard DNS query for resolving the DNS name is getting executed every 30 seconds. But when I check the DNS response TTL value it is 5 seconds.

Is there any parameter in Soap UI/ Load UI to reduce the execution frequency of standard DNS query.

This is required as I am doing availibility tests by bringing down few nodes from the server cluster.

Any inputs are highly appreciated

Regards,
Mir.