11-22-2011 09:02 AM - edited 03-07-2019 03:32 AM
Hi , I hav e a 3750X Cisco Switch (WS-C3750X-48T-S) It is two Ethernet base SFP installed and working fine at slot 1 & 2,
Now i am trying to install GLC-SX-MM in 3rd and 4th slot, but its not coming up, showing not present, any idea why its happening?
Gi1/1/1 connected trunk a-full a-1000 10/100/1000BaseTX SFP
Gi1/1/2 connected trunk a-full a-1000 10/100/1000BaseTX SFP
Gi1/1/3 notconnect 1000 auto auto Not Present
Gi1/1/4 notconnect 1 auto auto Not Present
image i am using is
C3750E-UNIVERSALK9-M
any help would be great, thank you
Solved! Go to Solution.
11-22-2011 09:25 AM
You should be able to mix and match copper and optical SFPs in that module type.
Have you set 'speed nonegotiate' on interface Gi1/1/3? This is necessary for optical SFPs.
11-22-2011 09:16 AM
Assuming you have installed either C3KX-NM-1G (Four GbE port network module) or C3KX-NM-10G (Two 10GbE SFP+ ports network module with four physical ports with two SFP+ and two regular SFP ports) you should be able to use those transceivers.
The GLC-SX-MM is explicitly noted as supported on the 3750-X data sheet and is not footnoted to not work in the SFP+ slots.
There aren't any obvious caveats in the Installation Guide.
Do you get any PHY Message log event when inserting the SFP? Is the SFP verified operable in a different switch?
Hope this helps.
11-22-2011 09:22 AM
i dont get any log alert, same module works 3560 switch so SFP is good.
yes i am using C3KX-NM-1G
i doubt if there is any limitation in ipbase license?
Or any limitation, that i will have to use all 4 ports for GLC-SX-MM or GLCT ? because existing two SFP are Copper base.
11-22-2011 09:25 AM
You should be able to mix and match copper and optical SFPs in that module type.
Have you set 'speed nonegotiate' on interface Gi1/1/3? This is necessary for optical SFPs.
11-22-2011 09:44 AM
You really saved my life , yes i can see the SFP module now , it worked, thank you very much.
11-22-2011 09:47 AM
You're welcome - glad it helped.
The reason I knew to suggest that was from having overlooked the same command myself in the past.
Thanks for the rating.
11-22-2011 10:00 AM
hehe now i can help others in future
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