Port Priority (Link Aggregation); System Priority (Link Aggregation) - Huawei OptiX OSN 550 Configuration Manual

7 List of Parameters

7.64 Port Priority (Link Aggregation)

Description
The Port Priority (Link Aggregation) parameter specifies the priority of the ports in the link
aggregation group of the LACP protocol. The port priority can be set. It indicates the priority
level of a port to be aggregated. If a port is of higher priority, this port is preferred to carry the
services. If a link aggregation group (for example, manual aggregation group) does not run the
LACP protocol, it does not take effect after the port priority is set.
Impact on the System
If other conditions (for example, port rate, and port working mode) are the same, a port of higher
priority is preferred to carry the services.
Values
Valid Values
0-65535, in step length of 1
Configuration Guidelines
If the value of Port Priority is smaller, the priority is higher.
When using a port to carry the services, set Port Priority to a smaller value. Otherwise, set Port
Priority to a greater value.
Relationship with Other Parameters
The member port state in the link aggregation group is decided according to these parameters,
such as port working mode, port working rate, whether the port receives LACP packets, port
priority, and LAG priority.

7.65 System Priority (Link Aggregation)

Description
The System Priority (Link Aggregation) parameter specifies the priority level of a link
aggregation group. It may affect the working state of the member ports in the link aggregation
group.
Impact on the System
When the link aggregation groups at the local and opposite ends negotiate with each other by
sending LACP packets, they can get the system priority of the link aggregation groups from each
other. The result selected at the end of higher priority is taken as the result for the two ends. If
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Default Value
32768
System
Configuration Guide
Issue 02 (2011-06-30)