[93256] in North American Network Operators' Group
Re: CWDM equipment (current favorites) (fwd)
daemon@ATHENA.MIT.EDU (Deepak Jain)
Fri Nov 3 17:27:10 2006
Date: Fri, 03 Nov 2006 17:26:05 -0500
From: Deepak Jain <deepak@ai.net>
Reply-To: deepak@ai.net
To: Adam Rothschild <asr+nanog@latency.net>
Cc: alex@pilosoft.com, nanog@merit.edu
In-Reply-To: <20061103011722.GA78634@latency.net>
Errors-To: owner-nanog@merit.edu
> As there's no specification for 2.5 gigabit ethernet (that I'm aware
> of), and SONET gear with pluggable optics is likely out of your
> league, I'm afraid that's a decision you'll have to make. :-)
>
> There are plenty affordable[1] options available 1U for switches with
> 10GE uplink ports. I've had good luck with the Extreme Summit x450.
> If you're a bit more daring, Allied Telesyn recently announced a
> switch with a similar port density, though lacking in the useful
> "bunch of SFPs rather than 10/100/1000 ports" configuration.
>
> More and more, I'm finding it difficult to justify deploying n x GE
> port-channels across dark fiber, when 10GE is a lot easier to scale
> and troubleshoot...
>
Since we are clarifying...
Yes, 10G is a nice option when you can use reasonably priced optics
(<80km). CWDM (nx2.5 or nx1G) works happily up to 30+db of loss and
reduces complexity if you can avoid all the associated pieces of DWDM
you may need to address conditions in the long reach end of the range.
Deepak
