Which action should the engineer take to resolve this issue?

Refer to the exhibit.

An engineer implemented several configuration changes and receives the logging message on switch1.

Which action should the engineer take to resolve this issue?
A . Change the VTP domain to match on both switches
B . Change Switch2 to switch port mode dynamic auto
C . Change Switch1 to switch port mode dynamic auto
D . Change Switch1 to switch port mode dynamic desirable

View Answer

Answer: A

Explanation:

The logging message on switch1 likely indicates a VTP (VLAN Trunking Protocol) domain mismatch error, which occurs when two switches have different VTP domain names. VTP is a Cisco-proprietary protocol that propagates the definition of Virtual Local Area Networks (VLANs) on the whole local area network. To resolve this issue, the engineer should ensure that both switches are configured with the same VTP domain name, allowing them to properly share VLAN information.

References: Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) course materials provide detailed information on VTP operations and troubleshooting.