From: keith tokash (ktokash@hotmail.com)
Date: Wed Feb 06 2008 - 03:27:43 ARST
http://www.cisco.com/en/US/solutions/collateral/ns340/ns517/ns224/ns668/net_q
anda0900aecd80534905.html
Q. What new functions does DFC3C support?
A.
DFC3C supports all functions of DFC3B. Since a PFC3C based supervisor
engine is not yet available, a DFC3C will operate like a DFC3B in your
system at this point in time.
I'm not sure if that answers your question entirely. Another interesting
note:
Q.
Can we mix these 10 Gigabit Ethernet modules and other modules with
centralized forwarding card (CFC) or other DFCs in the same chassis?
A.
Yes, we will support a mix of DFC and CFC in the same chassis. The
chassis will operate in the mode of the lowest common denominator
(Table 3).
We tried to use a 6708 with the DFC3C (instead of a DFC3CXL, note the "XL") in
a chassis with a Sup720-3BXL and it wouldn't power on. Good thing too since
if it did it would have kicked our 3BXLs down to 3Bs and we would have dropped
BGP routes, which would have made me a sad sad panda. So 3B on the Sups go
fine with the DFC3C, but don't mix and match the "XL" and the non-XL unless
you are willing to take the performance hit.
HTH
With a few exceptions, secrecy is deeply incompatible with democracy and with
science.
--Carl Sagan
> Date: Tue, 5 Feb 2008 21:23:13 +0530
> From: rookie.ccie@gmail.com
> To: ccielab@groupstudy.com
> Subject: 6500 - 67xx line cards
>
> Dear Group,
>
> Please let me know whether we need to use DFC-3C cards on 67xx line cards
to
> get 40Gbps per slot capacity. I went through lot of Cisco doc's but could
> not find that it is required (DFC-3C).
>
>
> Regards
>
> Uchil
>
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