I have configured port security on all 48 ports of my Cisco 2960-S switch with following commands.
switchport port-security mac-address sticky
All end devices connected to switch ports are PCs.Because of these commands on most of the ports,the mac address of the respective PC is sticked automatically.
When my Desktop Team changes PC behind these ports I issue command " no switchport port-security mac-address sticky x.x.x.x.x.x " and the ports learn new mac address and sticks the same on the associated port.
However some of the port are not showing that sticked mac address despite PC connected to them are communicating in the network.
But When my Desktop Team changes PC behind these ports,the ports are going in error disabled mode and coming up only when I remove port security feature on them.
What can be reason behind this? Can anyone help to resolve this issue.
Kindly refer the attachment.