[c-nsp] Sup720-3BXL and diag issues

[Jimmy Changa]

I have a 6500 with a sup720-3BXL. Every time I put a WS-X6408A-GBIC card in
the chassis, diag fails the card.

I haven't rebooted the box yet, as this carrys a significant amount of
traffic, has anyone else seen this type of problem.

Diag on the most recent card shows:

7) TestUnusedPortLoopback:

      Port  1  2  3  4  5  6  7  8
      ----------------------------
            U  U  U  F  U  U  U  F

The cards work in other chassis.