[c-nsp] WS-X6904-40G + FourX: Some SPF+ cause err-disable

[Matti Saarinen]

Chris Welti wrote:

> What type of SFP+ do you use?
> "show idprom int Te4/13 | i Product"
>
> the "service unsupported-tranceiver" only helps with the "vendor protection", but
> not with the transceiver type (Product ID).

Yes, the wrong Product ID turned out to be the reason for the problem.
The first two SFP+'s reported Product ID as like of double quotes (").
The Cisco lookalike works fine.

Initially I had also problems with the Cisco stamped one as well. The
reason turned out to be that while testing different SFP+'s I had
managed to dismount the FourX adapter, too. (Note to self: tighten the
screws even a little bit even while testing.) As a sidenote can also be
mentioned that during the testing I managed to try two SFP+'s both of
which had broken RX side.

Matti