Operation Manual – Link AggregationH3C S7500 Series Ethernet Switches Chapter 1 Link Aggregation Configuration1-1Chapter 1 Link Aggregation ConfigurationWhen configuring link aggregation, go to these sections for information you areinterested in:z Overviewz Link Aggregation Configurationz Displaying and Maintaining Link Aggregation Configurationz Link Aggregation Configuration Example1.1 Overview1.1.1 Introduction to Link AggregationLink aggregation means aggregating several links together to form an aggregationgroup, so as to implement outgoing/incoming load sharing among the member ports inthe group and to enhance the connection reliability.Depending on different aggregation modes, aggregation groups fall into three types:manual, static LACP, and dynamic LACP. Depending on whether or not load sharing isimplemented, aggregation groups can be load-sharing or non-load-sharing aggregationgroups.Note:Up to 384 aggregation groups can be created in a system, where up to 64 load-sharingaggregation groups can be created.For the member ports in an aggregation group, their basic configuration must be thesame. The basic configuration includes STP, QoS, VLAN, port attributes and otherassociated settings.z STP configuration, including STP status (enabled or disabled), link attribute(point-to-point or non-point-to-point), STP priority, STP path cost, STP standardpacket format, maximum transmission speed, loop guard status, root guard status,edge port or not.z QoS configuration, including traffic rate limiting, priority marking, default 802.1ppriority, bandwidth assurance, congestion avoidance, traffic redirection, trafficstatistics, and so on.z VLAN configuration, including permitted VLANs, and default VLAN ID.