Huawei Quidway S6500 Series Operation Manual page 63

Operation Manual - Port
Quidway S6500 Series Ethernet Switches
By default, an aggregation group has no descriptor.
Note that 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.
2.2.5 Configure System Priority
The LACP refers to system IDs in determining if the member ports are selected or
standby one 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 considered prior.
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.
Table 2-5 Configure system priority
Configure system priority
Restore the default system priority
By default, system priority is 32768.
2.2.6 Configure 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 ones 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.
Perform the following configuration in Ethernet port view.
Operation
Huawei Technologies Proprietary
2-7
Chapter 2 Link Aggregation Configuration
Command
lacp
system-priority-value
undo lacp system-priority
system-priority