R3303-HP HSR6800 Routers Layer 2 - LAN Switching Configuration Guide

9
The one at the top is chosen as the reference port. If two ports have the same aggregation priority, duplex
mode, and speed, the one with the lower port number is chosen.
Setting the aggregation state of each member port
After choosing the reference port, the static aggregation group sets the aggregation state of each
member port, as shown in Figure 4. A
fter the static aggregation group has reached the limit on Selected
ports, any port assigned to the group is placed in Unselected state to avoid traffic interruption on the
current Selected ports.
Figure 4 Setting the aggregation state of a member port in a static aggregation group
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.
Choosing a reference port
The local system (the actor) and the remote system (the partner) negotiate a reference port by using the
following workflow:
1. The systems compare their system IDs (each system ID comprises a system LACP priority and a
system MAC address). The system with the lower LACP priority value is chosen. If they are the same,
the systems compare the system MAC addresses. The system with the lower MAC address is
chosen.
2. The system with the smaller system ID chooses 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
No
Port attribute/class 2 configurations
same as the reference port?
More candidate ports than max.
number of Selected ports?
Is the port up?
Is there any hardware restriction?
Port number as low as to set
the port in the Selected state?
Set the aggregation state
of a member port
Set the port in the Selected state
Set the port in the
Unselected state
Yes
Yes
No
Yes
No
Yes
No
Yes
No