Aggregating Links In Dynamic Mode - H3C SR8800 Configuration Manual

Aggregating links in dynamic mode

LACP is automatically enabled on all member ports in a dynamic aggregation group. The protocol
automatically maintains the aggregation state of ports.
The dynamic link aggregation procedure comprises:
• Selecting a reference port
Setting the aggregation state of each member port
•
Selecting a reference port
The local system (the actor) and the remote system (the partner) negotiate a reference port using the
following workflow:
Compare the system ID (comprising the system LACP priority and the system MAC address). The
1.
system with the lower LACP priority value wins out. If they are the same, compare the system MAC
addresses. The system with the lower MAC address wins.
The system with the smaller system ID selects the port with the smallest port ID as the reference port.
2.
A port ID comprises a port aggregation priority and a port number. The port with the lower
aggregation priority value wins out. If two ports have the same aggregation priority, the system
compares their port numbers. The port with the smaller port number wins.
Setting the aggregation state of each member port
After the reference port is selected, the system with the lower system ID sets the state of each member port
in the dynamic aggregation group on its side as shown in Figure 25.
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