Aggregation Group Categories - Huawei Quidway S3900 Series Operation Manual

Operation Manual – Link Aggregation
Quidway S3900 Series Ethernet Switches-Release 1510
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 (selected or unselected) of the member
ports of dynamic aggregation groups.
IV. Configuring port priority
LACP determines the selected and unselected 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
selected ports supported by the device in each group, LACP determines the selected
and unselected states of the ports according to the port IDs. The ports with superior
port IDs will be set to selected state and the ports with inferior port IDs will be set to
unselected state.
The port ID consists of two-byte port priority and two-byte 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.

1.1.7 Aggregation Group Categories

Depending on whether or not load sharing is implemented, aggregation groups can be
load-sharing or non-load-sharing aggregation groups.
For IP packets, the system will implement load-sharing based on source IP
address and destination IP address;
For non-IP packets, the system will implement load-sharing based on source MAC
address and destination MAC address.
In general, the system only provides limited load-sharing aggregation resources
(currently N/2 load-sharing aggregation groups can be created at most, N is the number
of ports), so the system needs to reasonably allocate the resources among different
aggregation groups.
The system always allocates hardware aggregation resources to the aggregation
groups with higher priorities. When load-sharing aggregation resources are used up by
existing
non-load-sharing ones.
aggregation groups,
Huawei Technologies Proprietary
Chapter 1 Link Aggregation Configuration
newly-created aggregation
1-6
groups will be