Networking · Episode 35 · 2:11

Verify switch port security

Name: Verify switch port security
Uploaded: 2026-11-07
Duration: PT131.55S
Description: Test Cisco switch port security in restrict mode, compare traffic from two sources, and restore access with the correct MAC address.

Test Cisco switch port security in restrict mode, compare traffic from two sources, and restore access with the correct MAC address.

English narration and on-screen explanations. Read the narration transcript.

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Narration transcript

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In this lab, two source routers reach the same destination through an access switch.
Verify both paths and identify the hardware address of the source on the port we will protect.
Enable port security and allow one deliberately different address on the protected port.
The protected source can no longer reach the destination, while the other source still can.
Restrict mode reports the violation and keeps the port up.
Replace the configured address with the actual source address and check both paths again.

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