1Gig Trunk Ports C9407 to C9500

[afincher]

I have a C9407 with multiple trunk ports already connected to various Cisco model switches via fiber. C3750, C3750X, & C2960 just to name a few of the models.

We got our first 9500 series switch and the usual configurations are not working with a 1Gig SFP. I pop in a 10Gig SFP, and the link connects right up. Is there some configuration option needed to get 1Gig SFPs to work?

9407: v16.6.4 (Everest)

9500: v16.8.1a (Fuji)

Just for troubleshooting, the only configurations on both ports are "switchport mode trunk" right now.

[Patrick.Williams]

Are you receiving any errors in relation to the 1G  interface , such as incompatible sfp? , also is the module a sfp+ that supports both 1G and 10G.

To verify if the sfp optical module  is being detected by the switch run the sh inventory command , you should have a SN or a name listed in the associated switch port.

[afincher]

I'm not seeing any errors on the interface. Each SFP is a single-speed SFP (so only 1Gig or 10Gig). They correctly show in sh inventory.

Each switch has a generic SFP-10G-LR & generic GLC-SX-MMD SFP. The SFP-10G-SR & other GLC-SX-MMD are Cisco SFPs.

9407:

NAME: "TenGigabitEthernet5/0/1", DESCR: "SFP+ 10GBASE-LR"
PID: SFP-10G-LR , VID: , SN: **********

NAME: "TenGigabitEthernet5/0/2", DESCR: "SFP+ 10GBASE-SR"
PID: SFP-10G-SR , VID: A , SN:**********

NAME: "TenGigabitEthernet5/0/3", DESCR: "GE SX"
PID: GLC-SX-MMD , VID: 001 , SN:**********

NAME: "TenGigabitEthernet5/0/4", DESCR: "GE SX"
PID: GLC-SX-MMD , VID: , SN:**********

9500:

NAME: "TwentyFiveGigE1/0/1", DESCR: "SFP+ 10GBASE-LR"
PID: SFP-10G-LR , VID: , SN:**********

NAME: "TwentyFiveGigE1/0/3", DESCR: "SFP+ 10GBASE-SR"
PID: SFP-10G-SR , VID: A , SN:**********

NAME: "TwentyFiveGigE1/0/5", DESCR: "GE SX"
PID: GLC-SX-MMD , VID: 001 , SN:**********

NAME: "TwentyFiveGigE1/0/7", DESCR: "GE SX"
PID: GLC-SX-MMD , VID: , SN:**********

The 10Gig works with no issues. Might be a sign to just make everything 10Gig (not really possible though).

[Francesco Molino]

What is your c9500 exact model?

Some needs version 16.10.1
Take a look on this link:
https://tmgmatrix.cisco.com/home

Can you try to upgrade the switch and test again?

[Leo Laohoo · Accepted solution]

Raise a TAC Case. It could be CSCvk59766.

[afincher]

I upgraded the switch to 16.09.02 & that resolved the issue.

[Leo Laohoo]

Glad to hear the issue was finally resolved.
Thanks for the update.

[mohammed.alsum]

Hi 

Could you help me how the issue resolved 

I have similar case 

[mohammed.alsum]

I have C9500-24Q with the converter (CVR-QSFP-SFP10G) to use 1G SFP 

The edge switch is C2960X-24TS-L with normal 1G SFP (GLC-LH-SMD)

I already update the software of C9500 switches to 16.09.02 but the SFP in Edge switch not working 

could you advise