An enterprise is using the wireless network as the main network connection for corporate users and guests. To ensure wireless network availability, two standalone controllers are installed in the head office APs are connected to the controllers using a round-robin approach to load balance the traffic. After a power cut, the wireless clients disconnect while roaming. An engineer tried to ping from the controller but fails. Which protocol needs to be allowed between the networks that the controllers are Installed?

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D. IP Protocol 97 IP Protocol 97 is EtherIP, which Cisco WLCs use to build mobility tunnels between controllers for client roaming. When clients roam between APs associated to different controllers, traffic is encapsulated in EtherIP and forwarded through this tunnel. Blocking IP Protocol 97 between the controllers breaks inter-controller roaming and causes client disconnections after the power cut restores the links.

Answer

A. IP Protocol 67 IP Protocol 67 has no role in Cisco WLC mobility tunneling; UDP port 67 is used by DHCP, and no Cisco wireless mobility function maps to IP Protocol 67.

Answer

B. IP Protocol 77 IP Protocol 77 is not assigned to any Cisco wireless controller communication or mobility tunneling function.

Answer

C. IP Protocol 87 IP Protocol 87 is reserved for IGRP routing and is unrelated to wireless controller mobility or CAPWAP functions.

An enterprise is using the wireless network as the main network connection for corporate users and guests. To ensure wireless network availability, two standalone controllers are installed in the…

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