3Com Switch 8807, Configuration Manual

Page: 107 / 883

Link Aggregation Configuration 107
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When a port is added into an aggregation group, the original ARP information
of the port will be lost.
Configuring/Deleting
Aggregation Group
Description
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
You cannot configure the description for a dynamic aggregation group.
Configuring System
Priority
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
pr 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.
Configuring Port Priority 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 pr 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
Operation Command
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
Operation Command
Configure system priority lacp system - priority system - priority - value
Restore the default system priority undo lacp system - priority