R3721-F3210-F3171-HP High-End Firewalls High Availability Configuration Guide-6PW101

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NOTE:
• The maximum number of selected ports in a static aggregation group is 8.
• To ensure stable aggregation state and service continuity, do not change port attributes or class-two
configurations on any member port.
• If a static aggregation group has reached the limit on Selected ports, any port joins the group is placed
in the Unselected state to avoid traffic interruption on the current Selected ports. Avoid this situation,
however, because it may cause the aggregation state of a port to change after a reboot.
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.
Selecting a reference port
The local system (the actor) and the remote system (the partner) negotiate a reference port using the
following workflow:
1. Compare the system ID (comprising the system LACP priority and the system MAC address). The
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.
2. The system with the smaller system ID selects the port with the smallest port ID as the reference port.
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 62.