Preview Tool

Cisco Bug: CSCsy78562 - GLC-LH-SM unable to linkup S/N beginning with FNS using MMF cable.

Last Modified

Feb 22, 2014

Products (1)

  • Cisco Catalyst 3750-E Series Switches

Known Affected Releases


Description (partial)


SFP linkdown occurs after completely insert MMF cable.
But when cable is inserted not completely (half insert cable), link comes up and stays up.


This symptom is confirmed in the following condition;

GLC-LH-SM(S/N:OPC-) ---- LC-LC MMF [5m] ---- GLC-LH-SM(S/N:FNS-) 

Also this symptom is seen only on the combinations S/N beginning with OPC- and FNS-.

The same S/N series has no problem at all.
It seems that this symptom is a bug.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.