Why IP-based CAR is invalid on a WAN-side interface

Because NAT is configured on the WAN-side interface, the device cannot differentiate private IP addresses.

In V200R002C00 and later versions, to configure IP-based CAR on a WAN-side interface, create a VLANIF interface and configure IP-based CAR on the VLANIF interface.
-To limit the download rate, configure IP-based CAR for a specified destination address in the outbound direction.
-To limit the upload rate, configure IP-based CAR for a specified source address in the inbound direction.

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