-----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Eric Kuhnke Sent: Tuesday, June 01, 2004 2:06 PM To: nanog@merit.edu Subject: Re: OT: Looking for Ethernt/Optical Device

Be warned that you can't use non-Cisco CWDM SFPs or GBICs in a cisco switch or router... There is a PROM code in the cisco-sold units that is identified by IOS. Plug in a non-cisco SFP/GBIC and it will shut down the port. (This was discussed about 9 months ago on nanog-l, it should be in the archives).

Does anyone actually buy the $3500 CWDM SFPs? That's a $3300 profit margin for Cisco...

Scott McGrath wrote:

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Finisar also has CWDM optics in both the SFP and GBIC form factor

and they

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are quite a bit less expensive than the Cisco solution and they do have a 16 lambda passive OADM as well as the 4 and 8 lambda models.

Scott C. McGrath

On Tue, 1 Jun 2004, Erik Haagsman wrote:

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What you could try is use the Cisco CWDM-MUX-4 and it's pluggable optics that can be fit into any GBIC 802.3z compliant slot. It's just an OADM with 4 or 8 wavelengths that delivers GigE to any box with pluggable GBICs provided you use the right optics and it's quite a bit cheaper than using ONS stuff. That said, CWDM doesn't get you much further

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80 kilometres, above that DWDM is your only option, and a hell of a lot more expensive.

Cheers,

-- --- Erik Haagsman Network Architect We Dare BV tel: +31(0)10 7507008 fax:+31(0)10 7507005 http://www.we-dare.nl

On Tue, 2004-06-01 at 17:30, Michael Smith wrote:

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Hello All:

I'm wondering if anyone has seen a good and cheap(er) solution for providing multiple Gigabit Ethernet circuits over single pair of fiber. I'm looking for a way to do CWDM or DWDM that's cheaper

Hello Eric: You can issue the following command in the 3550 series that takes care of that issue. However, your mileage may vary. :-) No errdisable detect cause gbic-invalid Mike than than

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putting in a Cisco 15454 or 15327. I'm only going to be doing 2 GigE circuits between two switches, so I don't need to plan for future growth.

If anyone knows of a magic box that will do the above I would love to hear about it.

Thanks,

Mike

- -- Michael K. Smith NoaNet 206.219.7116 (work) 866.662.6380 (NOC) mksmith@noanet.net http://www.noanet.net

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