Dynamic Lacp Aggregation Group - H3C S7500 Series Operation Manual

Operation Manual – Link Aggregation
H3C S7500 Series Ethernet Switches
Note:
In an aggregation group, the selected port with the minimum port number serves as the
master port of the group, and other selected ports serve as member ports of the group.
In a static aggregation group, the system sets the ports to selected or standby state
according to the following rules:
The system sets the "most preferred" ports (that is, the ports take most
precedence over other ports) to selected state, and others to standby state. Port
precedence descends in the following order: full duplex/high speed, full duplex/low
speed, half duplex/high speed, half duplex/low speed.
The system sets the state of the following ports to "standby": port connected to a
peer device different from the one the master port is connected to; port connected
to the same peer device as the master port but to a peer port that is not in the
same aggregation group as the peer port of the master port.
The system sets the ports unable to aggregate with the master port (due to some
hardware limit, for example, cross-board aggregation unavailability) to standby
state.
The system sets the ports with basic port configuration different from that of the
master port to standby state.
There is a limit on the number of selected ports in an aggregation group. Therefore, if
the number of the member ports in an aggregation group exceeds the maximum
number supported by the device, the system will choose the member ports with lower
port numbers as the selected ports, and set others as standby ports.
Note:
For the restriction of LPU types on link aggregation, refer to

1.1.6 Dynamic LACP Aggregation Group

I. Introduction to dynamic LACP aggregation group
A dynamic LACP aggregation group is automatically created and removed by the
system. Users cannot add/remove ports to/from it. Ports can be aggregated into a
dynamic aggregation group only when they are connected to the same peer device and
have the same basic configuration, and the same rate and duplex mode.
Besides multiple-port aggregation groups, the system is also able to create single-port
aggregation groups, each of which contains only one port. LACP is enabled on the
member ports of dynamic aggregation groups.
Chapter 1 Link Aggregation Configuration
1-4
Table 1-2 and Table 1-3.