300-425 Question 252
Single answerAn enterprise network administrator is using Cisco Prime Infrastructure (PI) to monitor and manage a wireless network. The administrator notices that several access points (APs) are flagged as 'unreachable' in the system. After investigating, they find that these APs are operational and connected to the Wireless LAN Controller (WLC). What is the most likely cause of this issue in Cisco Prime Infrastructure?
- A
The APs are using outdated firmware not supported by Cisco Prime Infrastructure.
- B
SNMP communication between Cisco Prime Infrastructure and the WLC is misconfigured or blocked.
- C
The APs are configured with a different management VLAN than the WLC.
- D
The Cisco Prime Infrastructure database is corrupted and cannot retrieve device status.
Show answer and explanation
Correct answer: B
Explanation
Cisco Prime Infrastructure relies on SNMP communication to pull device status and other data from the WLC. If SNMP is misconfigured or blocked, Cisco Prime Infrastructure cannot retrieve accurate information, leading to devices like APs being flagged as 'unreachable.' Ensuring that SNMP settings are correctly configured and that there are no network-level blocks is essential for proper operation of Cisco Prime Infrastructure.
- A. Incorrect.
While outdated firmware can cause compatibility issues, it would not necessarily result in the APs being flagged as 'unreachable' if the WLC is still able to communicate with them.
- B. Correct.
SNMP misconfiguration or blocked communication is the most likely cause because Cisco Prime Infrastructure relies on SNMP to gather status information from devices, including APs connected to the WLC.
- C. Incorrect.
APs being on a different management VLAN than the WLC is irrelevant in this context because the WLC is responsible for AP communication, and Cisco Prime Infrastructure queries the WLC directly.
- D. Incorrect.
Database corruption in Cisco Prime Infrastructure is a rare issue and would typically cause broader system-wide problems rather than just marking specific APs as 'unreachable.'