Configuring Bidirectional CAR 679 system-view[SW7750] acl number 2000[SW7750-acl-basic-2000] rule permit source 10.1.1.1 0.0.0.255[SW7750-acl-basic-2000] quit[SW7750] interface Ethernet 2/0/1[SW7750-Ethernet2/0/1] qos[SW7750-qoss-Ethernet2/0/1] traffic-bandwidth outbound ip-group 2000 64 128 50ConfiguringBidirectional CARYou can enable or disable bidirectional CAR.With bidirectional CAR enabled, the switch considers an ACL rule applied todifferent ports as different rules. As a result, an applied rule can occupy multipleentries. If you enable CAR for traffic matching a certain rule on multiple ports, theswitch provides the specified bandwidth for the traffic matching the CAR rule on aper-port basis.With bidirectional CAR disabled, the switch considers an ACL rule applied todifferent ports as the same rule. As a result, an applied rule occupies only oneentry. If you enable CAR for traffic matching a certain rule on multiple ports, theswitch provides the specified bandwidth for all the traffic matching the CAR ruleon these ports to share.Suppose you want to allocate 2 Mbps of CAR bandwidth for the incoming trafficmatching ACL rule 0 and enable CAR on two ports with the traffic-limitcommand.■ If bidirectional CAR is enabled, each port guarantees 2 Mbps of bandwidth forits incoming traffic matching ACL rule 0.■ If bidirectional CAR is disabled, the switch guarantees 2 Mbps of bandwidth forthe traffic matching ACL rule 0 received on the two ports.Configuration Proceduren This command applies to only type-A I/O Modules. To make the configuration takeeffect, reboot the switch.Configuration Example ■ Enable bidirectional CARConfiguration procedure: system-view[SW7750] inboundcar enableConfiguringTraffic-Based SelectiveQinQQinQ is to encapsulate the VLAN tags of the private network in the VLAN tags ofthe public network in order that the packets are transmitted through thebackbone network of the carrier (also called public network). The traffic-basedTable 550 Configure bidirectional CAROperation Command DescriptionEnter system view system-view -Enable or disable bidirectionalCARinboundcar { enable |disable }RequiredDisabled by default.
