3com 8807 User Guide

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When a port is added into an aggregation group, the original ARP information 
of the port will be lost.

You can use the following command to create/delete aggregation group 
description (for manual aggregation and static link aggregation).

Perform the following configuration in system view.

By default, an aggregation group has no description.

n 

The LACP refers to system IDs in determining if the member ports are active and 
inactive for a dynamic LACP aggregation group. The system ID consists of 
two-byte system priority and six-byte system MAC, that is, system ID = system 
priority + system MAC. In comparing system IDs, the system first compares system 
priority values; if they are equal, then it compares system MAC addresses. The 
smaller system ID is considered prior.

Changing system priority may affect the priority levels of member ports, and 
further their active or inactive state.

Perform the following configuration in system view.

By default, system priority is 32,768.

The LACP compares system IDs first and then port IDs (if system IDs are the same) 
in determining if the member ports are active or inactive ones for a dynamic LACP 
aggregation group. If the ports in an aggregation group exceed the port quantity 
threshold for that group, the system shall set some ports with smaller port IDs as 
active ports and others as inactive ports. The port ID consists of two-byte port 
priority and two-byte port number, that is, port ID = port priority + port number. 
The system first compares port priority values and then port numbers and the 
small port ID is considered prior.

Perform the following configuration in Ethernet port view.

Table 90   Configuring/deleting aggregation group description

Set an aggregation group description 

link-aggregation group agg-id description 
alname 

Delete the aggregation group description 

undo link-aggregation group agg-id 
description

Table 91   Configuring system priority

Configure system priority 

lacp system-priority system-priority-value 

Restore the default system priority 

undo lacp system-priority