Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 82

A network engineer changed the port speed and duplex setting of an existing EtherChannel bundle that uses the PAgP protocol. Which statement describes what happens to all ports in the bundle?

Answer options

• A. PAgP changes the port speed and duplex for all ports in the bundle.
• B. PAgP drops the ports that do not match the configuration.
• C. PAgP does not change the port speed and duplex for all ports in the bundle until the switch is rebooted.
• D. PAgP changes the port speed but not the duplex for all ports in the bundle.

Correct answer:

Explanation

The correct answer is B, as PAgP will drop any ports in the EtherChannel that do not match the speed and duplex settings of the other active ports. Options A and D are incorrect because PAgP does not automatically change the settings across all ports; it only enforces compatibility. Option C is also incorrect because changes take effect immediately without requiring a reboot.