On Fri, 02 Apr 2010 21:48:00 -0600, you wrote:

> And the linecard I want to put in it uses a DFC3A. From the docs it 
> seems that this arrangement will work, but A) I have to reboot the box, 
> and B) PFC will fall back to operating as a PFC3A.

That is correct.

Can you live without 3B features? MPLS is only supported on the 3B,
for example (the prime example, actually).

> What is the performance difference between the PFC3A and PFC3B?

None.

> Are there any gotchas with running the 10G linecards in this box in this 
> condition?

There's MPLS, as mentioned, but there are other minor differences as
well.

-A

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