03-23-2012 02:06 AM - edited 03-07-2019 05:44 AM
We have bought four Cisco 3750X-24 Switches with IP Base license for 2 offices (2 switches at each office).
The offices are connected with 1 fiber pair and 2 CWDM units. We have 6 CWDM SFP (2x 1470nm, 2x 1490nm and 2x 1510nm).
All the switches are up and runnig with 1 problem: the SFP's in the SFP+ position didn't work.
Only the gigabit port 1/1/1 and 1/1/3 are connected. Gigabit 1/1/2 stay disconnected.
I already did some test with other SFP's and kabels.
Do I need to disable the tengig ports in the configuration?
Thanks!
03-26-2012 04:02 AM
Use below command and find the results for any Fiber cable related errors.
Switch # test cable-diagnostics tdr interface
Switch# show cable-diagnostics tdr interface
03-26-2012 04:12 AM
TDR test is nog supported:
Switch#test cable-diagnostics tdr interface gig 1/1/2
% TDR test is not supported on interface Gi1/1/2
The fiber cable connected to this sfp works fine. The sfp's with this cable work ok in port 1/1/1 but not in port 1/1/2.
05-13-2012 07:03 AM
hi Joeri-Bos ,
you can't use SFP modules in SFP+ Port containers, just because of this SFP modules didn't work on Gi1/1/2.
Try SFP+ transivers to get these ports working.
regards.
05-13-2012 12:32 PM
Could you post the SFP part numbers you are trying to troubleshoot. There are some limitations on what SFP's you can use in 10 Gig NM.
05-13-2012 03:14 PM
All the switches are up and runnig with 1 problem: the SFP's in the SFP+ position didn't work.
Only the gigabit port 1/1/1 and 1/1/3 are connected. Gigabit 1/1/2 stay disconnected.
Wait a second. This issue has got NOTHING to do with TDR.
SFP+???? In a C3KS-NM-10G module, you can only have a maximum of TWO (2) SFP+. If you want to mix SFP and SFP+ in a module it's two SFP and one SFP+.
You can never use more than three or more SFP+ in a module. This information is printed in front of the module itself.
Another thing: Look at your interface. It says "Gigabit" so it means it's SFP only and NOT SFP+. If your interface says "Ten" then it means your fibre optic module is SFP+.
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