c9300x with C9300X-NM-4C doesn't work with 100gb sfp

[dijix1990]

Why c9300x with C9300X-NM-4C doesn't work with 100gb sfp? speed sets automatically to 40G and 100G only works after upgrading to 17.13. It's very strange because I knew about it only after testing different firmware (with 17.9.4a 100g doesn't work too)

[M02@rt37]

Hello @dijix1990 

Do you check here you exact sfp model versus the IOS minimum recommended ?

https://tmgmatrix.cisco.com/?si=C9300X-NM-4C

[dijix1990]

Of course it's qsfp-40/100-srbd

[marce1000]

  - Are  you using compatible SFP(s) according to    Cisco Optics-to-Device Compatibility Matrix

  M.

[dijix1990]

Yes it's qsfp-40/100-srbd

[marce1000]

     - Sometimes latest firmware is needed ,

 M.

[M02@rt37]

Totally agree wirh you @marce1000 

[dijix1990]

It's weird because there is no information that 100g sfp need new software and I knew about it through some tests. According to matrix qsfp-40/100-srbd works from 17.5, but I use 17.9.4a

[balaji.bandi]

what is the model of full switch - as i know C9300X-NM-4C module works only certain models.

what QSFP you using ?

[dijix1990]

C9300x-24y, qsfp-40/100-srbd

[Leo Laohoo]

Are the optics Cisco-branded?

[dijix1990]

yes it's cisco original qsfp28 QSFP-40/100-SRBD. only with firmware 17.13 I can set speed 40 or 100

c9300x-01(config)#int Hu1/1/1
c9300x-01(config-if)#spe
c9300x-01(config-if)#speed ?
  100000  Force 100000 Mbps operation
  40000   Force 40000 Mbps operation

for firmware version 17.9.4a I don't set speed because of c9300x doesn't have this command 

[Leo Laohoo]

---

@dijix1990 wrote:
yes it's cisco original

---

I recommend you consider buying 3rd party optics and compare the experience.  

[dijix1990]

I have 100G from fs.com and it has the same behaviour before 17.13 it doesn't work))

[Leo Laohoo]

If the optics is in the switch, post the complete output to the following commands: 

sh interface <PORT>
sh idprom interface <PORT>
sh log | i Hu