[c-nsp] can't be -- output discards on 6500 gig-e

[Kevin Graham]

> Finally, we are able to solve the problem, after entering what appears to
> be an undocumented command (at least, Cisco's search engine and Google
> can't find it.)  'wrr-queue group-buffers'  TAC says that this will
> turn on flow control between the backplane and the output interface.

You hadn't mentioned concern about the backplane before -- which
sup/fabric combinations are you using and how heavily is it loaded?