1-11 Ethernet Link Aggregation ConfigurationWhen configuring Ethernet link aggregation, go to these sections for information you are interested in:z Overviewz Ethernet Link Aggregation Configuration Task Listz Configuring an Aggregation Groupz Configuring an Aggregate Interfacez Configuring Load Sharing for Link Aggregation Groupsz Displaying and Maintaining Ethernet Link Aggregationz Ethernet Link Aggregation Configuration ExamplesThe extended LACP functions is added. For the detailed introduction, refer to LACP functions.OverviewEthernet link aggregation, most often simply called link aggregation, aggregates multiple physicalEthernet links into one logical link to increase link bandwidth beyond the limits of any one single link.This logical link is called an aggregate link. It allows for link redundancy because the member physicallinks can dynamically back up one another.As shown in Figure 1-1, Device A and Device B are connected with three physical Ethernet links. Thesephysical Ethernet links are aggregated into an aggregate link, Link aggregation 1. The bandwidth of thisaggregate link can be as high as the total bandwidth of these three physical Ethernet links.Figure 1-1 Diagram for Ethernet link aggregationBasic ConceptsAggregation group, member port, aggregate interfaceLink aggregation is implemented through link aggregation groups. An aggregation group is a group ofEthernet interfaces aggregated together. For each aggregation group, a logical interface, called anaggregate interface is created. To an upper layer entity that uses the link aggregation service, a linkaggregation group looks like a single logical link and data traffic is transmitted through the aggregateinterface.There are two types of aggregate interfaces: bridge-aggregation (BAGG) interfaces, which are Layer 2aggregate interfaces, and route-aggregation (RAGG) interfaces, which are Layer 3 aggregate
