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

[Dirk-Jan van Helmond]

The 3CXL will work with a Sup720/3BXL, but will (ofcourse) operate in 3BXL
mode. no disadvantage (except financially).

The 3CXL has some more features than the 3BXL, the ones i know of:
- more MAC addresses
- 3CXL is needed for vss-1440


grtz,
Dirk


> I think i haven't made it clear enough....
>
> Let's suppose i have the following 2 systems:
>
> 6500/SUP720-3BXL
> 6724-SFP (DFC-3CXL)
>
> 6500/SUP720-3BXL
> 6724-SFP (DFC-3BXL)
>
> If i'm not mistaken both will operate in 3BXL mode, so what is the
> disadvantage of the first one?
>
>
> Now, suppose i also have the following 2 systems:
>
> 7600/RSP720-3CXL
> 6724-SFP (DFC-3CXL)
>
> 7600/RSP720-3CXL
> 6724-SFP (DFC-3BXL)
>
> If i'm not mistaken, the first one will operate in 3CXL, while the second
> one in 3BXL.
> So the first one would be better (in what terms? That is my secondary
> question).
>
> Generally, why should i choose 3BXL, when with a 3CXL i can have a 3BXL
> plus something more? That is my primary question.
>
>
> Regards,
> Tassos
>
> Arie Vayner (avayner) wrote on 20/2/2008 6:20 ìì:
>> 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 ìì:
>>> 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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>>>
>>>
>>
>>
>>
>
> --
> ***************************************
>          Tassos Chatzithomaoglou
> Network Design & Development Department
>               FORTHnet S.A.
>           <achatz at forthnet.gr>
> ***************************************
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