Less LDAP Operations through F5 Big IP than direct to Server

Hi,

 

I have configured a Virtual Server LDAP using iApps (BIG-IP 11.6.0 Build 4.0.420 Hotfix HF4). We can search and it works fine, but the client made test using a tool called slamd and it reports that when they execute the test direct to the LDAP Servers, the number of Operations per second is aprox 20k, but when they execute the test to the Virtual Servers, the number of Operations per Second is less than 5k.

 

Has anybody faced this problem?

 

Thanks for your help!