vlan 1 is flapping between port Gi1/0/2 and port Gi1/0/36

[ahmery]

Hi,

I am facing the above mention issue flapping between port Gi1/0/2 and port Gi1/0/36 since last month twice a week repeating, after checking in Cisco Switch3750X Logs this error comming ? before a month this issue was not coming suddenly it is coming might be reason for adding some wrong static route or adding new device on netwrok

Can somebody help me to diagnose this issue is this critical as this is my core switch all servers are connected to it.......

Thanks & Regards

Ahmer           

[devils_advocate]

Are you actually using Vlan1 for any hosts? Please say no

Can you post a config of the switch where the error appears?