CAPWAP

The Control And Provisioning of Wireless Access Points (CAPWAP) protocol is a standard, interoperable networking protocol that enables a central wireless LAN Access Controller (AC) to manage a collection of Wireless Termination Points (WTPs), more commonly known as wireless access points. The protocol specification is described in RFC 5415.[1]

Protocol overview

CAPWAP is based on Lightweight Access Point Protocol (LWAPP). The state machine of CAPWAP is similar to LWAPP's, but with the addition of a full Datagram Transport Layer Security (DTLS) tunnel establishment. The standard provides configuration management and device management, allowing for configurations and firmware to be pushed to access points (APs). Because the overall state design of the CAPWAP protocol is largely the same as the finite-state machine (FSM) in LWAPP, a detailed diagram is not needed.

The protocol uses a generic encapsulation and transport mechanism, making it independent of a specific radio technology. The specification of CAPWAP for a particular wireless technology is called a binding. An IEEE 802.11 binding is provided in RFC 5416.[2]

CAPWAP uses UDP ports 5246 (control channel) and 5247 (data channel).

Implementations

An example software implementation of CAPWAP is OpenCAPWAP[3]

gollark: On my desktop anyway, not the laptop.
gollark: Windows would use >30GB, has ads everywhere, would likely take longer to boot, does not as far as I know do good full disk encryption, generally tends to run slowly and randomly use excessive resources for no reason, and I would *need to pay for it*.
gollark: My Arch install fits in 20GB or so, and I could cut it further if I actually cared, has no ads, boots in 25 seconds off my SSD to a usable desktop including time to enter my encryption key and password, and runs blazing fast.
gollark: e. g. stupid preinstalled bloatware.
gollark: There can be issues other than hardware and drivers.

See also

References
  1. Calhoun (ed.); et al. (March 2009). "Control And Provisioning of Wireless Access Points (CAPWAP) Protocol Specification". IETF. Retrieved 24 October 2013.CS1 maint: extra text: authors list (link)
  2. Calhoun (ed.); et al. (March 2009). "Control and Provisioning of Wireless Access Points (CAPWAP) Protocol Binding for IEEE 802.11". IETF. Retrieved 24 October 2013.CS1 maint: extra text: authors list (link)
  3. "OpenCAPWAP". GitHub.com.


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