[31145] in North American Network Operators' Group
Re: GiGE performance question(s)
daemon@ATHENA.MIT.EDU (John Fraizer)
Thu Sep 14 00:54:30 2000
Date: Thu, 14 Sep 2000 00:51:21 -0400 (EDT)
From: John Fraizer <nanog@EnterZone.Net>
To: Scott Michel <scottm@CS.UCLA.EDU>
Cc: nanog@nanog.org
In-Reply-To: <Pine.SOL.4.10.10009131009190.6542-100000@panther.cs.ucla.edu>
Message-ID: <Pine.LNX.4.21.0009140045580.17815-100000@Overkill.EnterZone.Net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Errors-To: owner-nanog-outgoing@merit.edu
On Wed, 13 Sep 2000, Scott Michel wrote:
>
> On Tue, 12 Sep 2000, RJ Atkinson wrote:
> > >Anyone out there have any Cisco GigE operational experience? I've got a
> > >customer who's evaluating GigE to 100 switched Ethernet, and they want
> > >a homogeneous vendor network (I don't know why, I just help them write
> > >the trade study...) So far, there's a huge question about Cisco GigE
> > >to 100 switched performance and I was wondering if anyone's willing to
> > >cough up numbers.
> >
> > What sort of numbers are you after ?
>
> Well, given the customer, often the numbers their looking for are pretty
> nebulous and often not as well defined as anyone'd like, but getting a
> customer's requirements are usually that way to begin with.
>
> Basically, they want to be all Cisco, contemplating GiGE fiber for their
> backbone, with switched 100 to the desktop. The numbers they're interested
> in are number of sustainable 100 ports to GigE port. With a 45Gbs backbone
> quoted for the Cisco box, that would appear to be pretty limited.
If they're only feeding it with 45Mb/s, the GigE backbone will be MUCH
MORE than sufficient, even if it were to only operate at 1/5 optimal.
The GigE backbone will support about 100Mb/s ports blasting everything
they can. In the "real world", If you could expand nearly infinately
given the following configuration:
DS3 --> Router --GigE--> GigE-Switch
| | | | |
| | | | |----GigE-->10/100-Switch
| | | |------GigE-->10/100-Switch
| | |--------GigE-->10/100-Switch
| |----------GigE-->10/100-Switch
|---and on and on and on
---
John Fraizer
EnterZone, Inc
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