SFP-10G-SR-S connectivity issue with OM2 and OM3 fiber in serial

[BinjuPaul69933]

We have Cisco core and edge switches with SFP-10G-SR-S connected with an OM3 fiber backbone. We are experiencing an issue that the link will run only if an OM3 patch cord is used to patch the sfp to the backbone fiber panel. The link won't come up if we patch it with an OM2 patch cord. Is there any technical reason for this failure?

[Tom Randstrom · Accepted solution]

Technically, the OM2 patch cord should work, unless one of the following conditions:

• Long OM2 jumper lengths result in excess loss that then exceeds the SFPs link budget
• Bad/damaged connectors or fiber on OM2 jumper