LOL - having work in the OIBU with Chris (albeit for only 18 months) I'd
have to agree with his version as well. While in other places Cisco use
Cabletron maths (as I believe is the right place to lay this blame) the GSR
switching fabric is not one of them.
Matt.
-----Original Message-----
From: Chris Whyte [mailto:cwhyte@microsoft.com]
Sent: 19 July 2002 07:30
To: Majdi S. Abbas
Cc: Cisco-NSP
Subject: RE: [nsp] Gigabit Ether Channel on Cisco 12000s
Just fyi, I worked for GSR for 3 years. I would be happy to send you
something privately (that will most definitely convince you) if that
helps.
Thanks,
Chris
> -----Original Message-----
> From: Majdi S. Abbas [mailto:msa@samurai.sfo.dead-dog.com]
> Sent: Thursday, July 18, 2002 9:38 PM
> To: Chris Whyte
> Cc: Cisco-NSP
> Subject: Re: [nsp] Gigabit Ether Channel on Cisco 12000s
>
>
> On Thu, Jul 18, 2002 at 02:12:05PM -0700, Chris Whyte wrote:
> > Btw, it's 5Gbps full-duplex, *not* 2.5Gbps full-duplex.
>
> No, it's not:
>
> "2.5 Gbps switch fabric (80 Gbps switching system
> bandwidth) - This consists of the GSR16/80-CSC and the
> GSR16/80-SFC fabric set. Each SFC or CSC card provides a
> 2.5 Gbps full-duplex connection to each line card in the
> system. For a Cisco 12016 with 16 line cards, each with
> 2 x 2.5 Gbps capacity (full duplex), the system switching
> bandwidth is 16 x 5 Gbps = 80 Gbps."
>
> Note also that:
>
> "On 120xx models, each 2.5 Gbps chassis slot has up
> to four 1.25 Gbps serial line connections, one to each of
> the switch fabric cards to provide a total capacity of 5 Gbps
> per slot or 2.5 Gbps full duplex."
>
> The upgraded fabric in the 124xx series is 10 Gbps
> full-duplex, so you will not find any 12xxx model with 5
> Gbps full-duplex to a slot.
>
> > The docs don't tell the whole story (as usual). :-)
>
> They seem pretty clear to me, Chris.
>
> --msa
>
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