3com 3CBLSF26H Manual De Usuario

 

3-24 

Table 3-20 VLAN Port Detail Page item description 

Untagged 
Membership 

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 are 
forwarded by the interface. The frames contain VLAN information. 

 

Link aggregation aggregates multiple physical Ethernet ports into one logical link, called a Link 

Aggregation Group (LAG). 

It allows you to increase bandwidth by distributing traffic across the member ports in the aggregation 

group. In addition, it provides reliable connectivity because these member ports can dynamically back 

up each other. 

Link Aggregation Control Protocol (LACP) based on the IEEE802.3ad standard can be used for 

dynamic 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 and 

operation key. After receiving the information from the sender, the receiver compares it with the locally 

saved information about other ports, chooses member ports for the aggregation group and reaches 

agreement 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. 

 

The switch supports two link aggregation types: 

z 

Manual Aggregation 

z 

Static LACP Aggregation 

1) Manual 

Aggregation 

Manual aggregation is configured manually, and cannot be added or removed automatically. A manual 

or static LACP aggregation group must contain at least a member port. Member ports in a manual 

aggregation are LACP-disabled. 

A port in a manual aggregation group can be in one of the two states: selected or unselected. In a 

manual 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 to 

the following rules.