3750-48TS SFP

[KURT MORRIS]

Is it possible to install the GE SFP, LC GLC-SX-MM for a 3750-48TS upside down?

[Kyle Cohne · Accepted solution]

I don't beleive you can install any SFP upside down. I beleive they are designed to fit one way only.

[Reza Sharifi]

Hi Kurt,

Yes, just make sure the SFP module is all the way in the slot and secure and so is the LC cable connectors.  Once it is in it should not fall off.

I am assuming you mean the switch is upside down right?

HTH

Reza

[KURT MORRIS]

Actually the swtich is installed right side up , but we were not able to establish link integrigty after trying 2 different 3750's and multiple 62.5 fiber cables.

I am relying on remote site help and wanted to rule out  installing the sfp the wrong way. The far end device is a 6509 w/6516-GBIC which was not touched. We finally re-installed the original 3548-xl and of course the link came up.

[Reza Sharifi]

The SFP can only be inserted one way.  Since you are using 62.5 fiber, is the SFP defiantly multimode?

[KURT MORRIS]

Yes.

[ansalaza]

Here a couple of related docs:

GBIC and SFP Module Port Cabling Specifications
http://www.cisco.com/en/US/docs/routers/7200/install_and_upgrade/gbic_sfp_modules_install/5067g.html#wp34124

Cabling Specfications
http://www.cisco.com/en/US/products/hw/modules/ps4999/products_tech_note09186a00807a30d6.shtml#ins_rem4

[Reza Sharifi]

have you tried a different SFP module?

[KURT MORRIS]

Yes, as stated earlier we have tried 2 different 3750's and multiple fiber cables.

[glen.grant]

  Does it say anything in the logs ? Is it an cisco gbic ?   It may not work otherwise.  I believe there was a command  to bypass the check to see if it was a real cisco gbic .