SFP to SFP+

[dvannoy]

I have some swithes (2960's) in different bldgs connected via SFP ports back to data room. I'm swapping out these switches with the 2960x models and using SFP+ modules.

I'm having the strangest problem. I go to swap out the switches and can't get the SFP+ ports to light up. I know the connection and fiber is good because I have been using them. any idea on what would cause that to happen ?

any help would be appreciated.

Thanks

 

[imbadatthis]

where these rolled at any time between unplug and re-plug back in ?


Assuming they are multi mode and NOT single mode, take a on the fiber side and the switch side and make sure the one that is lite is going to the non lite one..

if its single mode, then use a paper and no light to see which head is turned on , again same deal..

aside from that are the SFP's seated correctly?
did they come with the purchase ? are they cisco ?




We must go always forward, not backward
always up, not down and always twirling twirling towards infinity.

 

[ADB100]

You don't mention what the original SFPs were and what the new SFP+'s are? I assume you are going from GLC-SX-MM or GLC-SX-MMD to SFP-10G-SR? You can find the compatibility lists here:

http://www.cisco.com/en/US/products/hw/modules/ps5455/products_device_support_tables_list.html

Andy