300-425 · Question #59
Which statement about the 9800 Series Wireless Controller mobility tunnel on a Cisco Catalyst 9800 controller is true?
The correct answer is C. It is a CAPWAP tunnel with control path and data path. The mobility tunnel on Cisco Catalyst 9800 Series Wireless Controllers uses CAPWAP protocol to carry both control and data plane traffic between controllers.
Question
Which statement about the 9800 Series Wireless Controller mobility tunnel on a Cisco Catalyst 9800 controller is true?
Options
- AIt is an IPsec tunnel with control path only.
- BIt is a CAPWAP tunnel with data path only.
- CIt is a CAPWAP tunnel with control path and data path.
- DIt is an IPsec tunnel with control path and data path.
How the community answered
(42 responses)- A5% (2)
- B2% (1)
- C90% (38)
- D2% (1)
Why each option
The mobility tunnel on Cisco Catalyst 9800 Series Wireless Controllers uses CAPWAP protocol to carry both control and data plane traffic between controllers.
IPsec is not used for the 9800 Series mobility tunnel; the protocol is CAPWAP, and the tunnel carries both control and data traffic, not control only.
While CAPWAP is correct, the mobility tunnel carries both control and data paths, not data path only.
The 9800 Series establishes CAPWAP-based mobility tunnels between controllers that carry both the control path (used for client roaming signaling and state synchronization) and the data path (used to forward client traffic during inter-controller roaming). This is distinct from the AP-to-controller CAPWAP tunnel and is specific to the inter-WLC mobility architecture.
The mobility tunnel uses CAPWAP, not IPsec, even though it does carry both control and data paths.
Concept tested: Cisco 9800 inter-controller mobility tunnel protocol
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/config-guide/b_wl_16_10_cg/mobility.html
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