Your security device under test may not to pass traffic due to the new MAC addresses in 3.70.

Knowledge Base - FAQ

Your security device under test may not to pass traffic due to the new MAC addresses in 3.70.
If  you are testing a security device that restricts MAC address, please note a new range of MAC address assignment is used starting on version 3.70.   The change is to accommodate MAC addresses being too close to each other on a cluster environment.  The change applies on Appliance chassis and STC chassis.  The MAC address can be changed in the Avalanche Commander (Administration | VIAVI TestCenter).  However, the value cannot be change on the Appliance chassis.