200-301 Question 202
Single answerA network administrator wants to verify Layer 2 neighbor information between two switches in the network. The switches are configured to use both Cisco Discovery Protocol (CDP) and Link Layer Discovery Protocol (LLDP). However, the administrator notices that no LLDP information is being exchanged. What could be the most likely reason for this issue?
- A
LLDP is disabled globally on the switches.
- B
The interfaces connecting the two switches are configured as access ports.
- C
The CDP protocol is interfering with LLDP, preventing it from functioning.
- D
The LLDP timer is set to its maximum value, causing delays in information exchange.
Show answer and explanation
Correct answer: A
Explanation
LLDP is not enabled globally by default on Cisco devices, unlike CDP. In this scenario, the lack of LLDP information exchange indicates that LLDP is likely disabled. The administrator needs to enable LLDP globally and on the relevant interfaces to resolve the issue.
- A. Correct.
LLDP must be explicitly enabled on Cisco devices, as it is not enabled globally by default. If LLDP is disabled, no LLDP information will be exchanged.
- B. Incorrect.
LLDP functions on both access and trunk ports. The type of port does not affect the exchange of LLDP information.
- C. Incorrect.
CDP and LLDP can operate simultaneously without interfering with each other. They are independent protocols.
- D. Incorrect.
While the LLDP timer affects how often updates are sent, it does not prevent the exchange of basic LLDP information.