Control And Provisioning of Wireless Access Points (CAPWAP) Protocol Specification, March Canonical URL: txt; File. RFC (part 1 of 6): Control And Provisioning of Wireless Access Points ( CAPWAP) Protocol Specification. Control and Provisioning of Wireless Access Points (CAPWAP) is a standard and interoperable RFC defines the actual CAPWAP protocol specifications.

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The need for flexible wireless network infrastructure cpwap become more pronounced as WLANs become larger and more widespread. The nature of such systems is of such complexity, that vendor implementations can vary widely in their scope and features, leading to incompatibilities between vendors.

The controller then authenticates the AP, and begins uploading firmware to the AP.

Overview of CAPWAP (Cisco Wireless LAN Controllers)

Because SLAPP supports both layer 2 and 3, access points may be in completely different routed networks as the controller, or even across the Internet. To provide an extensible protocol that is not bound to a specific wireless fapwap.

SLAPP was designed as a simple, extensible protocol that could be extended to other wireless standards, and allow for newer authentication schemes and control protocols to be implemented on top of SLAPP. Configure – An AP with a sufficient version of code may then request to be configured by the controller. This lack of customer mobility leads to less innovative product offerings from the wireless vendors. The access point contains the wireless radio sand acts as the end point of the network, and communicates directly with user radios.

The AP sends the controller its current configuration, and the controller responds with an updated configuration. The paper covers the current architecture of enterprise WLAN deployments, as well as proposed protocols that attempt to simplify their management and configuration, and allow inter-vendor compatibility of access points APs and controllers. Thus, the entire process of deploying an AP can be implemented in a vendor neutral format, from finding an initial controller, to deploying firmware updates, to configuration and access point redirection.

RFC – part 1 of 6

Ideally controllers of any vendor could provision access points from any other vendor, provided they implement a common CAPWAP protocol.

Finally configuration takes place, and the AP is set into active mode. SLAPP operates as the framework to make a connection between two devices, and negotiate a protocol. It merely relays the encrypted frames to the controller for processing. It is important to cawap that the definition of what a controller is is not clearly defined.


The Receiver is then responsible for processing the packets, and either dropping the packets, or moving a good connection into a Session Manager Thread.

CAPWAP – Wikipedia

Split and Local MAC medium access ccapwap. As mentioned in [Section 4. An overview of the architecture and protocols use in access point AP to controller communication in enterprise grade wireless networks.

However, [RFC] does give two example protocols: In this regard, the controller acts in similar 5451 to a router, by accepting and processing layer 2 frames, and then switching layer frames on to the access network. The process by which an AP discovers a controller, validates firmware, and downloads firmware and cpawap does not change. The implementation described in [Bernaschi09] is not ready for currently available APs.

It can perform forwarding between its wireless and wired interfaces, and direct traffic directly onto the network.

The creation of a vendor neutral protocol is a potential boon capsap consumers of enterprise grade managed wireless solutions. To enable shifting of the higher-level protocol processing from the WTP. Please refer to the current edition of the “Internet Official Protocol Standards” STD 1 for the standardization state and status of this protocol.

The firmware is vapwap to program radio capabilities on the AP. Second, it should make configuration of multiple hardware types transparent, and ensure configurations are consistent across the network.

Access points retrieve their configuration from the controller, and report their status back to the controller for management purposes. Securing – This phase establishes an encrypted tunnel, over which a protocol can be agreed upon. The AP handles the encryption of traffic between itself and its clients, with the controller provided keys.

In this survey, a look at different proposed standards for enabling WLAN controllers to support multi-vendor APs, and how to solve the problems introduced by the AP-controller architecture, has been taken.

The controller can then authenticate the AP, and negotiate its advertised capabilities, such as being Because they are standalone devices, they also cause difficulties when managing a caowap network of many devices, as firmware and configuration must be acpwap on an individual basis for each device.


CAPWAP only seeks to relay what a device is and is not capable of, in order to classify and provision the device into operation. Meru Air Traffic Control dapwap may be used to provision and manage APs, but provides no multi vendor support.

The testing was conducted with computers running Linux, with wireless cards as their radio, and wired interfaces as their link to the controller. LWAPP defines certain operation modes for compliant hardware. They are responsible for discovering, authenticating, and registration of APs, as well as maintaining a service channel to communicate over.

However, the process is slow, as upgrade paths are not necessarily direct and simple. Critics of SLAPP argue that it is an incomplete specification, as it enforces no minimal compatibility.

A unified CAPWAP standard aims to be a protocol that could enable centralized wireless hardware utilize a simple, streamlined method of communicating between access points and controllers. Decryption Error Report Period Currently, their WLAN controllers can only interface with Meru brand access points, utilizing a proprietary protocol. The AP typically contains some amount of logic, however, that amount is governed capwa; the MAC architecture that the AP implements, which will be covered in [Section 2].

Instead, SLAPP proposed a generic protocol for an AP style device to seek out a controller, and establish an encrypted connection, over which a protocol would be agreed upon, and carried out.

One of the reasons for such little support is that the deployment is restricted to a Layer 2 boundary. Insertion of Unprotected Records Additionally, because of its generic design, the network location of an AP and controller do not necessarily have to be within the same broadcast domain.

Acquiring – This state represents both devices connecting to each other, to begin encrypting their communications. A single Receiver thread receives and processes any requests from APs. In [fig6]the same SLAPP protocol would be used by an AP to decide how to download updated firmware, as would be used to determine a protocol to communicate with the controller.