Link Aggregation Configuration 53
â– port with 802.1X enabled.
â– You must delete the aggregation group, instead of the port, if the manual or
static LACP aggregation group contains only one port.
Setting/Deleting the Aggregation Group Descriptor
Perform the following configuration in System View.
By default, an aggregation group has no descriptor.
If you have saved the current configuration with the save command, 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 standby 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 standby state.
Perform the following configuration in System View.
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 standby 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.
Tab le 47 Setting/Deleting the Aggregation Group Descriptor
Operation Command
Set aggregation group descriptor link-aggregation group agg_id
description alname
Delete aggregation group descriptor undo link-aggregation group agg_id
description
Tab le 48 Configuring System Priority
Operation Command
Configure system priority lacp system-priority
system_priority_value
Restore the default system priority undo lacp system-priority
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