PFsens high ping time

[interisti_fans]

Dear All,

I have a problem with my pfsense configuration . I have topology like a picture on attachment. Microsoft forefront TMG has a default gateway to interface local CARP PFsense. When i try to ping IP CARP on local interface pfsense i get a high ping time mostly until 3 digit. I know when on normal condition should not be to much.  Is there any compatibility issue with my NIC interface on TMG ? or there is something i need to configure on pfsense when pfsense has a relationship with TMG ? Iam stuck on this situation please help me if anyone has the same experience .

Some of the steps that i have done to troubleshoot this problem :

1. I had updated the latest driver on my TMG NIC
2. I had updated the latest pfsense version 2.2.5 release

Thank youu all

Best Regards,

Petrik