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Highlighted
Beginner

3750 SFP Not Present

SWITCH-1:

 NAME: "GigabitEthernet1/1/1", DESCR: "1000BaseSX SFP"

PID: GLC-SX-MMD          , VID: V01  , SN: OPM20370J9X

 Model number                    : WS-C3750X-24P-L

 

SWITCH-2:

PS1-3-Switch#sh int gig1/1/1

Auto-duplex, Auto-speed, link type is force-up, media type is Not Present 

Model number                    : WS-C3750X-48P-L

 

SWITCH-2 interface Gi1/1/1 is not detecting the SFP - Although SWITCH-1 can detect it (I tried the same SFP in both switches and multiple interfaces). The switches are running the same code and they are in the same family. Does anyone have any ideas on how to fix this problem? The SFP is Cisco and the part number is: GLC-SX-MMD

1 ACCEPTED SOLUTION

Accepted Solutions
Highlighted
Cisco Employee

Re: 3750 SFP Not Present

Hello mediaos718,

 

It looks like there are some restrictions in regards to this network module and how it handles 1G / 10G SFP combinations. Please check this link and let me know if this information helps. (Link)

View solution in original post

8 REPLIES 8
Highlighted
Beginner

Re: 3750 SFP Not Present

Hi there,
Try "shut" command on the interface not recognising the sfp, Then type the command "no shut", insert the SFP again and hopefully it will work for you.
Please keep your eyes on the console out so you can pick any error messages, etc, at the time you insert the sfp.
Cheers,
Ben
Highlighted
Beginner

Re: 3750 SFP Not Present

I tried to shutdown the interface multiple times - No luck. No message on
the console or the log.

I also run the following commands:

Service unsupported-transceiver

No err disable detect cause gbic-invalid


no luck so far.
Highlighted
Beginner

Re: 3750 SFP Not Present

Hi there again,
If you can reload your switches will be good.
Lots of times it does the trick.

regards,

Ben
Highlighted
Beginner

Re: 3750 SFP Not Present

I rebooted it twice - It did not work

Highlighted
Hall of Fame Community Legend

Re: 3750 SFP Not Present

Could be a bug.
Post the complete output to the command "sh idprom interface Gi 1/1/1".
Highlighted
Beginner

Re: 3750 SFP Not Present

LA-Main-3-Switch#sh idprom interface Gi 1/1/1
%No module is present

 

I am using a "C3KX-NM-10G " Can I use all 4 slots at the same time? I am currently using the 2 slots for 2 Ten Gig uplinks (It is working). Now I am trying to use the 2 remaining slots for 1-Gig uplinks.

Highlighted
Cisco Employee

Re: 3750 SFP Not Present

Hello mediaos718,

 

It looks like there are some restrictions in regards to this network module and how it handles 1G / 10G SFP combinations. Please check this link and let me know if this information helps. (Link)

View solution in original post

Highlighted
Beginner

Re: 3750 SFP Not Present

Hello again,
You have to follow the specs of the "C3KX-NM-10G "module, as per Table 1, and there will be no issues.
2 x 1GB ONLY, 2 X MIX OF 1GB & 10GB. Slots are Marked Clearly.

Supported combinations of SFP and SFP+ modules:

•Slots 1, 2, 3, and 4 with 1-Gigabit SFP modules
•Slots 1 and 2 with 1-Gigabit SFP modules and Slot 4 with one 10-Gigabit SFP+ module
•Slot 2 with one 10-Gigabit SFP+ module and Slots 3 and 4 with 1-Gigabit SFP modules
•Slot 2 and Slot 4 each with 10-Gigabit SFP+ modules
Regards,

Ben
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