3Com SuperStack 4 Configuration Manual page 49

port with 802.1x enabled.
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You must delete the aggregation group, instead of the port, if the manual or
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static LACP aggregation group contains only one port.
Setting/Deleting the Aggregation Group Descriptor
Perform the following configuration in System View.
Table 48 Setting/Deleting the Aggregation Group Descriptor
Operation
Set aggregation group descriptor
Delete aggregation group descriptor undo link-aggregation group
By default, an aggregation group has no descriptor.
If you have saved the current configuration with the
configured manual aggregation groups, static LACP aggregation groups and
corresponding descriptors exist when the system reboots. But the dynamic LACP
aggregation groups do not exist, and even the descriptors configured for them will
not be restored.
Configuring System Priority
The LACP refers to system IDs in determining if the member ports are the selected
or unselected port 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 given priority.
Changing system priority may affect the priority levels of member ports, and
further their selected or unselected state.
Perform the following configuration in System View.
Table 49 Configuring System Priority
Operation
Configure system priority
Restore the default system priority
By default, system priority is 32768.
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 selected or unselected ports 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 selected ports and others as standby 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.
Link Aggregation Configuration
Command
link-aggregation group
alname
description
description
save
Command
lacp system-priority
system_priority_value
undo lacp system-priority
61
agg_id
agg_id
command, the