Data forwarding mode


Data forwarding mode:
- Centralized forwarding (also called tunnel forwarding): APs set up control tunnels and data tunnels with an AC. Control data between the AP and AC and service data from WLAN users are encapsulated in the control tunnel and data tunnel, respectively. After the service data reaches the APs, it must be sent to the AC through the data tunnel first and then be forwarded at L2 and L3.
- Direct forwarding (also called local forwarding): APs only set up control tunnels with an AC. After the service data reaches the APs, it directly enters the wired network through the switch that connects to the APs and then be forwarded at L2 and L3.
In summary, tunnel forwarding facilitates centralized management and control, and service data must be forwarded through an AC, reducing packet forwarding efficiency and burdening the AC. For direct forwarding, packet forwarding efficiency is high. You can select either of the forwarding mode as required.
AC deployment
- Bypass mode
ACs are directly connected to aggregation switches or core switches in bypass mode. If two ACs provide 1+1 backup, they connect to the aggregation switch or core switch.
- Establish an independent AC management area that connects to the core switch in bypass mode. In actual networking, an aggregation switch is connected to the core switch in bypass mode, and all the ACs are connected to the aggregation switch.
Verify the forwarding mode by checking that an AC serves as the gateway or running the display forward-type service xx command.

Other related questions:
Recommended mode for forwarding user data
User data can be forwarded in local forwarding or tunnel forwarding mode. Data traffic needs to be aggregated to the AC in tunnel forwarding mode, but not in local forwarding mode. The forwarding mode is determined by service requirements. If there are a large number of concurrent traffic flows, use local forwarding so that user data will not pass through the AC.

Is service data aggregated on an AC? What is the recommended forwarding mode and why
Service data can be forwarded locally or over a tunnel. Service data is aggregated on an AC only when it is forwarded over a tunnel. You can choose the forwarding mode according to the site requirements. When a large number of concurrent users exist, it is recommended that service data be forwarded locally.

Forwarding mode supported by the AR used as the AC
The AR supports only local forwarding of users' service data packets, and does not support centralized forwarding for the users' service data packets.

What are the differences in AP-side switch interface configuration and intermediate switch configuration in direct and tunnel forwarding modes

How to assure forwarding of IPSec data flows on an AR
Configure the QoS function for IPSec packets first, and then configure assured forwarding (AF) for IPSec data flows through MQC. system-view [Huawei]ipsec policy huawei 1 manual //Create an IPSec policy, set the SA creation mode to manual, and enter the IPSec policy view. Alternatively, you can complete the following configurations in the ISAKMP policy view, IPSec policy template view, IPSec profile view, Efficient VPN policy view, or GDOI policy view. [Huawei-ipsec-policy-manual-huawei-1]qos group 10 //Configure the QoS group to which IPSec packets belong. [Huawei-ipsec-policy-manual-huawei-1]quit [Huawei]traffic classifier c1 //Create a traffic classifier and enter the traffic classifier view. [Huawei-classifier-c1]if-match qos-group 10 //Configure a matching rule based on QoS group 10. [Huawei-classifier-c1]quit [Huawei]traffic behavior b1 //Create a traffic behavior and enter the traffic behavior view. [Huawei-behavior-b1]queue af bandwidth 3000 //Configure AF for the matched data flow. [Huawei-behavior-b1]quit [Huawei]traffic policy p1 //Create a traffic policy and enter the traffic policy view. [Huawei-trafficpolicy-p1]classifier c1 behavior b1 //Bind the traffic classifier to the traffic behavior. [Huawei-trafficpolicy-p1]quit [Huawei]interface GigabitEthernet 0/0/0 [Huawei-GigabitEthernet0/0/0]traffic-policy p1 outbound //Apply the traffic policy on the interface.

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