How to configure rate limiting on a physical interface

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WAN-side physical interfaces support rate limiting. You can limit the rate of outgoing packets on a WAN-side physical interface by configuring the percentage of the rate of packets against the interface bandwidth. Perform the following configuration:
1. Run the system-view command to enter the system view.
2. (Optional) Run the qos overhead layer { link | physics } command to configure the mode to calculate the packet length during traffic policing or traffic shaping.
By default, the system counts the physical-layer and link-layer compensation information in the packet length during traffic policing or traffic shaping.
3. Run the interface interface-type interface-number command to enter the interface view.
Run the qos lr pct pct-value [ cbs cbs-value ] command to configure the percentage of traffic rate against the interface bandwidth.
By default, the percentage of traffic rate against the interface bandwidth is 100.

Other related questions:
How to configure interface-based rate limiting through the web platform on the AR
1. Choose QoS > Interface Rate Limit to access the Interface Rate Limit page. 2. Click Create in the Interface Rate Limit List toolbar. 3. On the Create Interface Rate Limit page, select or enter parameters based on requirements. 4. Click OK to save the parameter settings. To delete interface-based rate limiting, perform the following operations: 1. Choose QoS > Interface Rate Limit to access the Interface Rate Limit page. 2. In the Interface Rate Limit List toolbar, select the interface where the rate limtiing configuration needs to be deleted and click Delete. 3. In the displayed dialog box, click OK.

How to delete the rate limiting configuration from an interface
1. Log in to the web system, and choose QoS > Interface Rate Limit to access the parameter configuration page for interface-based rate limiting. On the Interface Rate Limit List toolbar, select the check box of the interface from which the rate limiting configuration is to be deleted, and click Delete. Click OK in the displayed dialog box. The rate limiting configuration is deleted from on the interface. 2. Using commands: You can also run the undo command to delete configurations from the interface to which a traffic policy is applied or the interface with rate limiting configured.

How to configure rate limiting based on the SAC signature database on an AR?
The SAC signature database contains thousands of application protocols. An SAC traffic classifier defines the rule for matching packets. Users configure different SAC traffic classifiers to classify packets, and limit the rate of traffic in the traffic behavior. The traffic policy then can be applied in the inbound or outbound direction on the interface.

Does an AR support rate limiting on an interface
Both LAN and WAN interfaces support rate limiting. However, rate limiting does not take effect on NAT-enabled WAN interfaces.

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