Huawei AC6508 Access Controller

Huawei AC6507S is access controllers (AC) applicable to MANs and enterprise networks for wireless access. AC6507S has a large capacity and high performance. It is highly reliable, easy to install and maintain, and features such advantages as flexible networking and energy conservation.

The AC resides at the aggregation layer to provide the high-speed, secure, and reliable WLAN service. ‎Figure 1 shows the position of the AC in the overall network solution.

The AC6507S has the following features:
*Has various user policy management and authority control capabilities.
*Can be managed using the eSight, web system, or command line interface.

In tunnel forwarding mode, wireless data is transmitted between APs and ACs over CAPWAP tunnels.

In Figure below, both management flows and data flows of APs are transmitted to the AC over CAPWAP tunnels, and then the AC transparently transmits these flows to the upstream device.

Tunnel forwarding is usually used to control wireless user traffic in a centralized manner. This forwarding mode facilitates device deployment and controls all wireless service data flows by aggregating traffic of all wireless users connected to APs to an AC through CAPWAP data tunnels.

Bypass networking in tunnel forwarding mode:

Direct Forwarding
In direct forwarding mode, wireless data is translated from 802.3 packets into 802.11 packets, which are then forwarded by an uplink aggregation switch.

The bypass networking mode is often used on enterprise networks. Wireless data does not need to be processed by an AC, eliminating the bandwidth bottleneck and facilitating the usage of existing security policies. Therefore, this networking mode is recommended for integrated network deployment.

Application Scenarios of Huawei AC6507S:

The AC processes both control flows and data flows. Management flows must be transmitted over Control And Provisioning of Wireless Access Points (CAPWAP) tunnels. Data flows can be transmitted over CAPWAP tunnels or not, as required.

The CAPWAP protocol defines how APs communicate with ACs and provides a general encapsulation and transmission mechanism for communication between APs and ACs. CAPWAP defines data tunnels and control tunnels.
* Data tunnels encapsulate 802.3 data packets to be sent to the AC.
* Control tunnels transmit control flows for remote AP configuration and WLAN management.
* Two forwarding modes are available according to whether data flows are transmitted on CAPWAP tunnels: * Direct forwarding: is also called local or distributed forwarding.
* Tunnel forwarding: is also called centralized forwarding. It is usually used to control wireless user traffic in a centralized manner.

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