Cisco 9300 Switch - Show interfaces status displays connected :T

[a.stokoe]

Hello all,

Having been a Cisco User for the best part of 15 years I must confess to have never seen this and I can't seem to find an answer to this anywhere.

We have a Cisco 9300 (C9300-48U)  running Cisco IOS XE Software, Version 16.12.04. When issuing the command show interfaces status command we notice one of the ports displays as the following:

Gi3/0/33 connected: T 613 a-full a-100 10/100/1000BaseTX

Notice the connected: T - what on earth does that mean. I have never seen a port with a connected: T status. Does anyone know what it means?

Thanks in advance

Andy

[Leo Laohoo · Accepted solution]

The complete error message is "Show interfaces status displays connected :TDR running". 

This means the TDR function has crashed (and cannot be re-run until the switch is rebooted).  

The port, however, is still working normally.  Any more TDR function is no longer going to work.  

This is a known bug.

[Leo Laohoo]

Is there a port that is flapping (goes up and down continuously)?  
If this is so, make sure to fix that up quickly or else the switch will crash. 

IOS-XE version 16.12.4 is a very buggy version and will crash the switch if a port flaps.  Make sure to monitor each CPU (there are and memory utilization daily.

[a.stokoe]

Thanks Leo!