3Com 10014299 manual By default, no CAR rule of ACL list is established

	Committed Access Rate (CAR) 671
Operation	Command
Enter the acl view	acl acl-number[ match-order config
	auto ]
Configure the extended access control list	rule { normal special }{ permit
	deny } pro-number[source
	source-addr source-wildcard any ]
	[ destination dest-addr dest-
	wildcard any ] [source-port
	operator port1 [ port2 ] ]
	[destination-port operator port1 [
	port2 ] ] [icmp-typeicmp-type
	icmp-code] [logging]

By default, no CAR rule of ACL list is established.

For the same carl-index, only one CAR rule can be defined. The later defined CAR rule will overwrite the earlier CAR rule. However, multiple CAR rules with different carl-index may be defined.

Before the CAR rule is configured, fast forwarding must be disabled.

Applying the CAR Policy on the Interface

The CAR policy can take effect on the incoming and outgoing directions of the interface. For the packets conforming to CAR rules or ACL rules, the CAR policy can limit their rates.

Perform the following configurations on the interface view.

Table 712 Apply the CAR Rule on the Interface

Operation	Command
Apply the CAR policy or ACL rule on the	qos car { inbound outbound } { any
interface	acl acl-index carl carl-index }
	cir committed-rate cbs burst-size ebs
	excess-burst-size conform action
	exceed action
Delete the CAR policy or ACL rule applied	undo qos car { inbound outbound } {
to the interface	any acl acl-index carl
	carl-index } cir committed-rate cbs
	burst-size ebs excess-burst-size
	conform action exceed action

By default, no CAR policy or ACL is applied to any interface.

On one interface (inbound or outbound directions), multiple CAR policies can be applied. However, on each interface (both inbound and outbound directions), a total of 100 CAR policies can be applied. Up to 100 CAR policies can be applied on one interface (inbound and outbound directions).

You must disable fast forwarding before applying the CAR policies.