[c-nsp] DFC-3BXL vs DFC-3CXL

[Arie Vayner (avayner)]

Tassos,

Basically, if you have a Sup720-3B, it means you have a PFC3B.
If you have a module with DFC-3BXL then you will gain nothing, as the DFC has to match with the PFC model, so basically even though you have DFC-3BXL, it would operate in 3B mode.

The same works the other way. If you have Sup720-3BXL and DFC-3B on some module, you would basically force the whole router to work in 3B mode.

The reason for this is very simple. The DFC is basically a distributed replica of the central PFC, so they can only operate in the same mode.

Arie

-----Original Message-----
From: Tassos Chatzithomaoglou [mailto:achatz at forthnet.gr] 
Sent: Wednesday, February 20, 2008 18:11 PM
To: Arie Vayner (avayner)
Cc: cisco-nsp
Subject: Re: [c-nsp] DFC-3BXL vs DFC-3CXL

Hi Arie,

Can you please explain the "has to be matched" part?

I have both 6500/SUP720 and 7600/RSP720 systems and i would prefer to get DFC-3CXL cards (instead of DFC-3BXL), so i can use them at their maximum efficiency in both systems (interchangeably). Isn't that possible?


Regards,
Tassos

Arie Vayner (avayner) wrote on 20/2/2008 6:00 μμ:
> Tassos,
> 
> DFC-3CXL is used with RSP720, while DFC-3BXL is used with SUP720.
> The DFC has to be matched with the RSP/SUP module, as it is basically a
> replica of the PFC.
> 
> Arie
> 
>  
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Tassos
> Chatzithomaoglou
> Sent: Wednesday, February 20, 2008 17:41 PM
> To: cisco-nsp
> Subject: [c-nsp] DFC-3BXL vs DFC-3CXL
> 
> I'm looking for a document describing the differences between these 2
> DFC modules.
> 
> Looking through various CCO pages, the only difference i found was the
> number of mac addresses supported (64k vs 96k).
> Is there anything else i'm missing?
> 
> Also, has anyone used DFC-3CXL with 67xx modules on a 6500/SUP720-3BXL
> system?
> I guess they get downgraded to 3BXL, but since their price is the same,
> why not get the newer ones?
> 
> --
> Tassos
> 
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