Learn what to check when an access point fails to obtain an IP address through DHCP in a CAPWAP-based wireless network, including physical connectivity, uplink port configuration, and management VLAN settings, while understanding that the CAPWAP tunnel configuration is not relevant at this stage.
Table of Contents
Question
Which of the following items does not need to be checked if an AP fails to obtain an IP address through DHCP?
A. Whether the link between the AP and AC is properly connected.
B. Whether the uplink port of the AP is correctly configured.
C. Whether the CAPWAP tunnel configuration between the AP and AC is correct.
D. Whether a management VLAN is configured for the AP and AC.
Answer
C. Whether the CAPWAP tunnel configuration between the AP and AC is correct.
Explanation
The CAPWAP (Control and Provisioning of Wireless Access Points) tunnel configuration between the access point (AP) and the wireless LAN controller (AC) is not relevant when an AP fails to obtain an IP address through DHCP. The CAPWAP tunnel is established after the AP has successfully obtained an IP address and can communicate with the AC.
The process of an AP obtaining an IP address through DHCP typically occurs before the CAPWAP tunnel is established. Therefore, the CAPWAP tunnel configuration is not a factor that needs to be checked when troubleshooting an AP’s failure to obtain an IP address via DHCP.
Instead, the following items should be checked:
A. Whether the link between the AP and AC is properly connected: Ensure that the physical connection between the AP and the network (or the AC) is properly established and functioning.
B. Whether the uplink port of the AP is correctly configured: Verify that the uplink port on the AP is configured correctly, including settings such as VLAN tagging, trunk mode, or access mode, depending on the network configuration.
D. Whether a management VLAN is configured for the AP and AC: Check if a management VLAN has been properly configured and assigned for both the AP and the AC to communicate and exchange management traffic.
Ensuring the physical connectivity, uplink port configuration, and management VLAN configuration are correct is crucial for an AP to successfully obtain an IP address through DHCP before it can establish a CAPWAP tunnel with the AC.
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