200-301 Question 205
Select 4You are troubleshooting connectivity issues between two Cisco switches in your network. Both switches are connected directly using an Ethernet cable. You suspect a mismatch in port configurations. Which steps should you take to verify the Layer 2 discovery protocol configuration and gather information about the neighboring switch?
- A
Enable Cisco Discovery Protocol (CDP) globally using the 'cdp run' command.
- B
Use the 'show cdp neighbors' command to view details about directly connected devices.
- C
Enable LLDP globally using the 'lldp run' command.
- D
Use the 'show lldp neighbors detail' command to verify detailed information about the neighboring device.
- E
Use the 'show ip route' command to validate Layer 2 discovery protocol connectivity.
Show answer and explanation
Correct answers: A, B, C, D
Explanation
Layer 2 discovery protocols like CDP and LLDP are vital for gathering information about directly connected devices. Enabling these protocols globally and using the appropriate 'show' commands allows network administrators to verify connectivity and identify potential port configuration mismatches. The 'show ip route' command is unrelated to Layer 2 discovery protocols and is used for Layer 3 operations.
- A. Correct.
CDP must be enabled globally to allow Cisco devices to exchange discovery protocol information. Without this, no CDP information will be advertised or received.
- B. Correct.
The 'show cdp neighbors' command provides a summary of directly connected Cisco devices, including device ID, local interface, and platform.
- C. Correct.
LLDP must be enabled globally to allow devices to exchange discovery protocol information if non-Cisco devices are involved.
- D. Correct.
The 'show lldp neighbors detail' command provides detailed information about neighbors, including system name, port description, and capabilities.
- E. Incorrect.
The 'show ip route' command is used for Layer 3 routing table verification and is not relevant to Layer 2 discovery protocols.