Supported SFP modules

[ramziabdelhak]

Hi guys,

The situation is as follow:

2022: We have ordred some C9300L-48P-4X switches. At the time of ordrering the SFP  compatibiliy matrix mentionned that this type does not support SFP-LRM.

07-2023: Switches received, when provisionning them, i typed the following command:

• sh interfaces transceiver supported-list | inc LRM
  X2 LRM               ALL
  10GE LRM SFP+  ALL ...........  " does it mean that it support SFP LRM " ?

I wanted to test it out but i am afraid of some electrical issues on the switches

Thank you in advance,

[RoadRunner4k]

This link shows the supported SPF+ types supported on the C9300L. They don't mention anything about LRM support, might work but without any support from Cisco I would not run with it in a production environment. 

Optics Compatibility Matrix (cisco.com)

Searching for LRM support on this model there no hits. so if in doubt ask your Cisco account manager, they should be the best to answer  

[ramziabdelhak]

Thanks for the reply,

What about the command result i typed, what is your interpretation plz, ?

[Kasun Bandara]

@ramziabdelhak share output of #sh inventory

[pieterh]

if you omit the include you can see the headers of the columns:
     Transceiver Type                          Cisco p/n min version
                                                         supporting DOM
     ------------------                   -------------------------
-> this command aims to determine if DOM is supported for an SFP, not if the SFP is supported in the switch
ALL should mean all hardware versions of this SFP support DOM
but do not completely rely on this output, there have been bugs detected in the past
Cisco Bug: CSCub83549 - show interface transceiver supported-list shows same transceiver twice
so if in doubt contact your account manager

[ramziabdelhak]

Thank you pieterh, that helped me a lot. From what i read, DOM is a sort of API "can be accessed in cli" that provides informations about SFP shown in the output of the mentionned command.

For our situtation, and as a workaround, we ordred X2-LRM to sfp-sr adapter to be plugged on the core switch and use sfp-sr on the 9300L.

Thanks again.

Thnks again,

[pieterh]

here is a post explaining some DOM functionality

Digital Optical Monitoring - DOM - Cisco Community