Hi All,
we are facing issue with the stp which is causing the interface to bounce every 60 seconds or less, need help identify the issue?
.Aug 25 15:37:05.969: %SPANTREE-6-PORT_STATE: Port Gi0/19 instance 3116 moving from blocking to learning
.Aug 25 15:37:05.969: %SPANTREE-6-PORT_STATE: Port Gi0/19 instance 3177 moving from blocking to learning
.Aug 25 15:37:05.969: %SPANTREE-6-PORT_STATE: Port Gi0/19 instance 3178 moving from blocking to learning
.Aug 25 15:37:05.969: %SPANTREE-6-PORT_STATE: Port Gi0/19 instance 3254 moving from blocking to learning
.Aug 25 15:37:10.624: %SPANTREE-6-PORT_STATE: Port Gi0/17 instance 3116 moving from forwarding to disabled
.Aug 25 15:37:10.624: %SPANTREE-7-PORTDEL_SUCCESS: GigabitEthernet0/17 deleted from Vlan 3116
.Aug 25 15:37:10.624: %SPANTREE-6-PORT_STATE: Port Gi0/17 instance 3177 moving from forwarding to disabled
.Aug 25 15:37:10.624: %SPANTREE-7-PORTDEL_SUCCESS: GigabitEthernet0/17 deleted from Vlan 3177
.Aug 25 15:37:10.624: %SPANTREE-6-PORT_STATE: Port Gi0/17 instance 3178 moving from forwarding to disabled
.Aug 25 15:37:10.624: %SPANTREE-7-PORTDEL_SUCCESS: GigabitEthernet0/17 deleted from Vlan 3178
.Aug 25 15:37:10.624: %SPANTREE-6-PORT_STATE: Port Gi0/17 instance 3254 moving from forwarding to disabled
.Aug 25 15:37:10.624: %SPANTREE-7-PORTDEL_SUCCESS: GigabitEthernet0/17 deleted from Vlan 3254
.Aug 25 15:37:11.136: %DTP-5-NONTRUNKPORTON: Port Gi0/17 has become non-trunk
.Aug 25 15:37:11.631: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/17, changed state to down
.Aug 25 15:37:12.637: %LINK-3-UPDOWN: Interface GigabitEthernet0/17, changed state to down
.Aug 25 15:37:17.796: %LINK-3-UPDOWN: Interface GigabitEthernet0/17, changed state to up
.Aug 25 15:37:18.820: %SPANTREE-6-PORT_STATE: Port Gi0/17 instance 3116 moving from disabled to blocking
.Aug 25 15:37:18.820: %SPANTREE-6-PORT_STATE: Port Gi0/17 instance 3177 moving from disabled to blocking
.Aug 25 15:37:18.820: %SPANTREE-6-PORT_STATE: Port Gi0/17 instance 3178 moving from disabled to blocking
.Aug 25 15:37:18.820: %SPANTREE-6-PORT_STATE: Port Gi0/17 instance 3254 moving from disabled to blocking
.Aug 25 15:37:19.298: %DTP-5-TRUNKPORTON: Port Gi0/17 has become dot1q trunk
.Aug 25 15:37:19.826: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/17, changed state to up
.Aug 25 15:37:20.975: %SPANTREE-6-PORT_STATE: Port Gi0/19 instance 3116 moving from learning to forwarding
.Aug 25 15:37:20.975: %SPANTREE-6-PORT_STATE: Port Gi0/19 instance 3177 moving from learning to forwarding
.Aug 25 15:37:20.975: %SPANTREE-6-PORT_STATE: Port Gi0/19 instance 3178 moving from learning to forwarding
.Aug 25 15:37:20.975: %SPANTREE-6-PORT_STATE: Port Gi0/19 instance 3254 moving from learning to forwarding
.Aug 25 15:37:20.975: %SPANTREE-5-TOPOTRAP: Topology Change Trap for vlan 3116
VLAN0040 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 6 last change occurred 1w1d ago
from Port-channel3
VLAN0041 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 2 last change occurred 1w1d ago
from Port-channel3
VLAN0252 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 7 last change occurred 1w1d ago
from Port-channel3
VLAN3002 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 6 last change occurred 1w1d ago
from Port-channel3
VLAN3104 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 6 last change occurred 1w1d ago
from Port-channel3
VLAN3111 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 6 last change occurred 1w1d ago
from Port-channel3
VLAN3116 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 34557 last change occurred 00:00:16 ago
from GigabitEthernet0/19
VLAN3177 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 34550 last change occurred 00:00:16 ago
from GigabitEthernet0/19
VLAN3178 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 34550 last change occurred 00:00:16 ago
from GigabitEthernet0/19
VLAN3192 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 0 last change occurred 3w1d ago
VLAN3254 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 34555 last change occurred 00:00:16 ago
from GigabitEthernet0/19
VLAN3800 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 8 last change occurred 1w1d ago
from Port-channel3
VLAN3801 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 6 last change occurred 1w1d ago
from Port-channel3
