What is a Mobility Tunnel?

[Mitrixsen]

Hello, everyone.

My question is pretty straightforward. What is a CAPWAP mobility tunnel? I found it while I was covering Roaming for ENCOR.

From what I understand, it's an encrypted CAPWAP tunnel between the WLCs that they use to exchange information (about roaming, for example).

So does CAPWAP offer 3 different kinds of tunnels - control, data, and mobility? Or how does this work exactly? Is my understanding of this correct?

Thank you.
David

[M02@rt37]

Hello David,

Mobility tunnels are separate from the standard CAPWAP control and data tunnels and are specifically designed to maintain session continuity during client mobility across different WLCs. Mobility messages are exchanged.

See details here: https://www.mixednetworks.com/enwlsd-300-425/wireless-roaming-concepts/ --Intercontroller roaming-Layer 3

[Saikat Nandy]

Everything falls under the same term 'CAPWAP' but differs in ports - 

CAPWAP tunnel between WLC & AP uses UDP port 5246 (Control) and 5247 (data)
CAPWAP mobility tunnel between WLCs uses UDP port 16666 (Control Path) and 16667 (Data Path).