During STP troubleshooting, you determined that the problem is caused by a user connecting a rogue switch to an access port, and that rogue switch becoming the root bridge.
Enable BPDU Guard on the portfast access ports, so it doesn’t happen again.
Information Security Notes
During STP troubleshooting, you determined that the problem is caused by a user connecting a rogue switch to an access port, and that rogue switch becoming the root bridge.
Enable BPDU Guard on the portfast access ports, so it doesn’t happen again.