Can IP-based rate limit be configured on a Layer 2 interface

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IP-based rate limit cannot be configured on a Layer 2 interface. Create a VLANIF interface and configure IP-based CAR on the VLANIF interface.

Other related questions:
Configure rate limiting based on IP addresses
You can run the qos car command in the interface view to configure rate limiting based on IP addresses.

How to delete the rate limiting configuration on interfaces of an S series switch
For S series fixed switches (except the S1700), you can run the undo qos lr inbound command in the interface view to delete the rate limiting configuration on the inbound interface. This method can be used on S series fixed switches, such as the S1720GFR, S1720GW-E, S1720GWR-E, S2700, S3700, S5700, and S6700. For S series modular switches, to delete the rate limiting configuration on the inbound interface, you can cancel the application of a CAR profile on the interface and then delete the profile. For example, cancel the application of CAR profile qoscar1 on GE1/0/1, and then delete the profile. [HUAWEI] interface gigabitethernet 1/0/1 [HUAWEI-GigabitEthernet1/0/1] undo qos car inbound [HUAWEI-GigabitEthernet1/0/1] quit [HUAWEI] undo qos car qoscar1 This method can be used on S series modular switches, such as the S7700, S9700, S12700, and S9300. For S series switches (except the S1700), you can run the undo qos lr outbound command in the interface view to delete the rate limiting configuration on the outbound interface. This method can be used on S series switches, such as the S1720GFR, S1720GW-E, S1720GWR-E, S2700, S3700, S5700, S6700, S7700, S9700, S12700, and S9300. For S series switches (except the S1700), you can run the undo qos lr command in the management interface view to delete the rate limiting configuration on the management interface. The management interface of fixed switches (such as the S5700 and S6700) is meth 0/0/1. The management interface of modular switches (such as the S7700, S9700, S12700 and S9300) is Ethernet 0/0/0.

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