You suspect a physical issue with the Silicom PEG2BPi5 or PEG4BPi Physical bypass 2 or 4 port Network Card used on the Symantec Web Gateway 8450 and 8490 appliances. You wish to know how to run a diagnostics check of these cards.
The ISO file to run a Network card diagnostic check can be obtained from Symantec support.
The instructions are as follows: