Help with fiber SFP's

houstonrob · ‎04-21-2009

My company is currently in the process of building a new multistory building and we plan to run 62.5nm fiber from each floor up to the server room. I talked to Cisco for help because I don't have a whole lot of experience dealing with fiber and they recommended using 1000Base-BX SFP's but as I read about them it seems like they are for single mode fiber, is this true? It seems like I should be using the GLC-SX-MM (1000Base-SX) SFP's for this; if anyone can help shed some light it would be greatly appreciated.

Collin Clark · ‎04-21-2009

Scroll down to the table below the pictures (form the link). It will show what SFPs work with which fiber types.

http://www.cisco.com/en/US/products/hw/modules/ps4999/products_tech_note09186a00807a30d6.shtml#model2

Here is another helpful link.

http://www.cisco.com/en/US/docs/routers/7200/install_and_upgrade/gbic_sfp_modules_install/5067g.html#wp29002

Hope that helps.

c.captari · ‎04-21-2009

Yep, 1000base-bx seems to be for SMF (single mode fiber)

with GLC-SX-MM you can use multimode. be aware that the distance limitation can be up to 275m on a 62.5nm core

houstonrob · ‎04-22-2009

Hi and thanks for your replies. After I posted this question here I realized I should have posted it in the 'LAN, routing and switching' section. I reposted the question there and received many helpful responses. Thanks for your help