[c-nsp] GLC-SX-MM and 50µm mm fiber

[Bill White]

Single mode (Sm) fiber is cheaper, 50 um has been more expensive than 62.5 um in our cases.  The costs for SX vs LX GBICs/SFPs is getting so close it should be a wash in most cases when considered with SM fiber.  SM fiber has theoretically unlimited bandwidth.  Watch out for the salesman.  Saying you must have 50 um for 10GE in new installations is mostly to their benefit.

In addition I'd look more towards TDWM, multiple laser capable SM fiber.  Things like using 1 strand in place of 2 for tx/rx, or redundant paths is our 3-7 year view.

Bill White, CCNP, CNE, SCP
Network Specialist II
Department of Information Technology
City of Henderson
240 Water Street
P.O. Box 95050
Henderson, NV 89009-5050
 
702-267-4350
Cell 702-249-0183
Fax 702-267-4302

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Adam Greene
Sent: Monday, November 13, 2006 10:39 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] GLC-SX-MM and 50µm mm fiber

Hi,

We're about to roll out some 3560G's with GLC-SX-MM's, and I see they are rated for use with both 62.5µm and 50µm multimode fiber. We're accustomed to deploying 62.5µm fiber but have been learning that 50µm is probably more forward-looking in terms of being able to support 10Gbps if we later upgrade the 3560G's.

I assume the GLC-SX-MM should work fine with 50µm but just wanted to make sure there aren't any reasons I'm not thinking of why we should stick with 62.5µm.

Any input would be appreciated.

Thanks,
adam





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