Logging only shows the interface going down and up, and consequently STP status changes:

<189> JAN 17 11:31:17 10.0.200.64-1 TRAPMGR[245162672]: traputil.c(637) 661417 %% Te1/0/2 is transitioned from the Forwarding state to the Blocking state in instance 0
<189> JAN 17 11:31:17 10.0.200.64-1 TRAPMGR[245162672]: traputil.c(637) 661416 %% Link Up: Te1/0/2
<189> JAN 17 11:31:17 10.0.200.64-1 TRAPMGR[245162672]: traputil.c(637) 661415 %% Te1/0/2 is transitioned from the Forwarding state to the Blocking state in instance 0
<189> JAN 17 11:31:17 10.0.200.64-1 TRAPMGR[245162672]: traputil.c(637) 661414 %% Link on Te1/0/2 is failed
<189> JAN 17 11:31:17 10.0.200.64-1 TRAPMGR[245162672]: traputil.c(637) 661413 %% Link Down: Te1/0/2

5548 FW version: 4.1.0.10

8024F FW version: 5.0.1.3

I have only changed ports on the 8024F as any changes to the 5548 could cause downtime on a production environment.

There have not been any changes made to the effected ports configuration for over a year.

There have been STP changes on the 5548 te1/0/2 port that connects to the 8024F, though there have been very few errors and no operation status changes on that port compared to the 8024F port. I have been concentrating on the 8024F as it's where I have seen all the errors and the port actually going down.

The 8024F is being used as a core switch that has all the trunk connections to the switch stacks in other cabinets. None of the other ports/connections are having any issues.

The current network layout and STP configuration has been in placed for years now with no issue. Could the errors on the 8024F port be caused by issues with the 5548? If so I can organise some maintenance periods to replace the SFP on the switch.

switch064#show spanning-tree tengigabitethernet 1/0/2

Port Te1/0/2 Enabled
State: Discarding                                 Role: Designated
Port id: 128.2                                        Port Cost: 2000
Port Fast: No                                         Root Protection: No
Designated bridge Priority: 16384    Address: D067.E599.4DC4
Designated port id: 128.2                   Designated path cost: 2000
CST Regional Root: 40:00:D0:67:E5:99:4D:C4
Root Guard..................................... FALSE
Loop Guard..................................... FALSE
TCN Guard...................................... FALSE
Auto Portfast.................................. TRUE
Port Up Time Since Counters Last Cleared....... 0 day 0 hr 0 min 0 sec
BPDU: sent 18350187, received 8328871

switch064#show spanning-tree summary

Spanning Tree Adminmode........... Enabled
Spanning Tree Version............. IEEE 802.1w
BPDU Guard Mode................... Disabled
BPDU Flood Mode................... Disabled

BPDU Filter Mode.................. Disabled
Configuration Name................ D0-67-E5-99-4D-C4
Configuration Revision Level...... 0
Configuration Digest Key.......... 0xac36177f50283cd4b83821d8ab26de62
Configuration Format Selector..... 0