Catalyst 3850_24XS-S switchport disabled

[Sam-emmanuel-tag]

Hello,

Please I do need assistance... 

I am working on a catalyst 3850 switch, I plugged a cisco 10G sfp+ SR module to an interface and connected it to a firewall.

The port light alternates between orange and green color, though the orange color stays abit longer then switches to green... the transition from green back to orange is very swift more like something is being triggered.

When I issue the command "show interface te1/0/1 switchport " the response is Disabled. 

I have issued debug command to monitor the interface and see if stp is disabling the port, but it doesn't say...

Please, how do I solve this, I need help

[Leo Laohoo]

Post the complete output to the following command: 

sh interface status err

[Sam-emmanuel-tag]

TESLA-CORE-SW#sh int status err

Port      Name               Status       Reason               Err-disabled Vlans
Te1/0/9   TRUNK TO HYUNDAI-S err-disabled gbic-invalid

Note: that's not the interface I am troubleshooting. I am troubleshooting te1/0/1 interface

[Sam-emmanuel-tag]

So I issued :

Sh int te1/0/1 status err 

And the status is connected 

[marce1000]

                                                                            >....err-disabled gbic-invalid
   Are you using a Cisco supported SFP according to https://tmgmatrix.cisco.com/

  M.

[Sam-emmanuel-tag]

Yes i am... the error you highlighted in red is not the output from the interface i am troubleshooting...

But yes i am using a Cisco sfp-10G-SR transceiver

[marce1000]

 - What is the output then for 'your problematic interface' when troubleshooting ?

 M.

[MHM Cisco World]

friend 
FW not support autonego 
so disable it and hardcoded the speed and duplex 

MHM

[Sam-emmanuel-tag]

i did this as well, both on the firewall and on the switch. though on the 3850 switch, the duplex command does not work. But i hardcoded the speed. The interface is 10gb data rate and hence it uses full duplex by default.

[Sam-emmanuel-tag]

TESLA-CORE-SW#sh int status err

Port Name Status Reason Err-disabled
Vlans
Te1/0/9 TRUNK TO HYUNDAI-S err-disabled gbic-invalid

[MHM Cisco World]

Note: that's not the interface I am troubleshooting. I am troubleshooting te1/0/1 interface <<- T1/0/9 is other issue now issue of te1/0/1 is speed duplex 
MHM

[MHM Cisco World]

Note: that's not the interface I am troubleshooting. I am troubleshooting te1/0/1 interface <<- T1/0/9 is other issue now issue of te1/0/1 is speed duplex 
MHM

[Sam-emmanuel-tag]

i have configured this, still same issue...And the thing i have verified using various commands, and the interface seems fine. Also to note, the port is a routed port.

[MHM Cisco World]

It router port so

Show interface x/x switchport sure will be disable.

Show ip interface x/x 

Check status 

MHM

[marce1000]

 - If you talk about the port being a routed port , then check the logs on the switch just after a connection attempt is done. And last but not least : also check the logs on the firewall related to networking or else global!!

 M.

[marce1000]

          >...The port light alternates between orange and green color
            Besides debug check logs on the switch too after this pattern stops

 M.