3Com 3CBLSF26PWRH User Manual

Also see for 2226-SFP Plus: Installation and user guide

Contents

3-24Table 3-20 VLAN Port Detail Page item descriptionItem DescriptionUntaggedMembership Indicates the port is an untagged member of the VLAN.Tagged membership Indicates the port is a tagged member of a VLAN. VLAN tagged frames areforwarded by the interface. The frames contain VLAN information.Aggregating PortOverviewLink aggregation aggregates multiple physical Ethernet ports into one logical link, called a LinkAggregation Group (LAG).It allows you to increase bandwidth by distributing traffic across the member ports in the aggregationgroup. In addition, it provides reliable connectivity because these member ports can dynamically backup each other.LACPLink Aggregation Control Protocol (LACP) based on the IEEE802.3ad standard can be used fordynamic link aggregation. An LACP-enabled port sends link aggregation control protocol data units(LACPDUs) to tell the peer about its system priority, system MAC address, port priority, port number andoperation key. After receiving the information from the sender, the receiver compares it with the locallysaved information about other ports, chooses member ports for the aggregation group and reachesagreement about whether a port can join or leave a dynamic aggregation group.During link aggregation, LACP generates a configuration mix according to the port configuration (rate,duplex, basic configuration, management key), which is called an operation key.Link Aggregation TypesThe switch supports two link aggregation types:z Manual Aggregationz Static LACP Aggregation1) Manual AggregationManual aggregation is configured manually, and cannot be added or removed automatically. A manualor static LACP aggregation group must contain at least a member port. Member ports in a manualaggregation are LACP-disabled.A port in a manual aggregation group can be in one of the two states: selected or unselected. In amanual aggregation group, only the selected ports can forward user service packets.In a manual aggregation group, the system sets the ports to selected or unselected state according tothe following rules.