300-425 · Question #223
An engineer is planning a wireless deployment with two members in a mobility group. The engineer notices that there are issues establishing the mobility tunnel. The engineer must test the mobility…
The correct answer is B. eping. The 'eping' command tests EoIP (Ethernet over IP) data-plane connectivity in the Cisco WLC mobility tunnel, while 'mping' tests the mobility control-plane - these are distinct tests for different tunnel layers.
Question
An engineer is planning a wireless deployment with two members in a mobility group. The engineer notices that there are issues establishing the mobility tunnel. The engineer must test the mobility EoIP data packet communication between two controllers. Which command runs this test?
Options
- Adebug route
- Beping
- Cdebug icmp
- Dmping
How the community answered
(44 responses)- A7% (3)
- B86% (38)
- C2% (1)
- D5% (2)
Why each option
The 'eping' command tests EoIP (Ethernet over IP) data-plane connectivity in the Cisco WLC mobility tunnel, while 'mping' tests the mobility control-plane - these are distinct tests for different tunnel layers.
The 'debug route' command traces IP routing decisions on the controller and does not send or test EoIP data packets between mobility peers.
The 'eping' command on a Cisco WLC sends an EoIP ping to a peer mobility controller, specifically testing whether the GRE/EoIP data plane of the mobility tunnel is operational. This is the correct tool for verifying that actual client data can traverse the mobility tunnel between two controllers, and a successful response confirms bidirectional EoIP connectivity at the data-forwarding layer.
The 'debug icmp' command enables ICMP packet debugging on the controller and does not test EoIP data-plane connectivity between mobility group members.
The 'mping' command tests the mobility control-plane (UDP port 16666) between WLCs, verifying mobility messaging connectivity - not EoIP data forwarding, which is what the question specifically requires.
Concept tested: Cisco WLC mobility EoIP tunnel data-plane testing
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/command-reference/8-10/b_cr810/e_commands.html
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