Link Aggregation Configuration
the port IDs of the preferred device (that is, the device with smaller system ID). The
following is the negotiation procedure:
1) Compare device IDs (system priority + system MAC address) between the two
parties. First compare the two system priorities, then the two system MAC addresses
if the system priorities are equal. The device with smaller device ID will be considered
as the preferred one.
2) Compare port IDs (port priority + port number) on the preferred device. The
comparison between two port IDs is as follows: First compare the two port priorities,
then the two port numbers if the two port priorities are equal; the port with the
smallest port ID is the bundled port and the left ports are standby ports.
7.1.5.4 Configuring System Priority
LACP determines the bundled and standby states of the dynamic aggregation group
members according to the priority of the port ID on the end with the preferred device ID.
The device ID consists of system priority and system MAC address, that is, device ID =
system priority + system MAC address.
When two device IDs are compared, the system priorities are compared first, and the
system MAC addresses are compared when the system priorities are the same. The device
with smaller device ID will be considered as the preferred one.
Note:
Changing the system priority of a device may change the preferred device between
the two parties, and may further change the states (bundled or standby) of the
member ports of dynamic aggregation groups.
7.1.5.5 Configuring Port Priority
LACP determines the bundled and standby states of the dynamic aggregation group
members according to the port IDs on the device with the preferred device ID. When the
number of members in an aggregation group exceeds the number of bundled ports supported
by the device in each group, LACP determines the bundled and standby states of the ports
according to the port IDs. The ports with superior port IDs will be set to bundled state and the
ports with inferior port IDs will be set to standby state.
The port ID consists of port priority and port number, that is, port ID = port priority + port
number. When two port IDs are compared, the port priorities are compared first, and the port
numbers are compared if the port priorities are the same. The port with smaller port ID is
considered as the preferred one.
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