Intermediate Port Shutoff

[GloballyUnique]

My inside trunked router port randomly shuts, with no indication of why in the logs. I had debug STP. What's another debug I can enable to try and get an idea why?
Router Log 

Dec 3 2025 01:26:37 UTC: %TRACK-6-STATE: 22 interface Gi0/0/1.2 ip routing Up -> Down
Dec 3 2025 01:26:37 UTC: %TRACK-6-STATE: 31 interface Gi0/0/1.3 line-protocol Up -> Down
Dec 3 2025 01:26:37 UTC: %TRACK-6-STATE: 32 interface Gi0/0/1.3 ip routing Up -> Down

Switch Log
Dec 3 2025 01:29:00 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/4, changed state to down

[GloballyUnique]

Hardware & Software

PACSTAR 441 IOS XE v17.04.01

PACSTAR 447 IOS XE v17.09.04a

[Kasun Bandara]

@GloballyUnique hi, check the #show interface x/x/x

check if there is any, CRC errors, drops , runts , etc

[Cristian Matei]

Hi,

    How often does it happen? Is it periodically with more or less same time gap between events? Is this a copper or fiber link? Is it a direct link or there are additional passive/active devices in the path (patch-panel, switch, etc)? Can you paste the output of "show interfaces Gi0/0/1" from the router (assuming this is the flapping link) and "show interfaces Gi1/4" from the switch (assuming this is the flapping link) ?

Thanks,

Cristian.