Port States; Link Aggregation Configuration - H3C S9500 Series Operation Manual

Operation Manual – Link Aggregation
H3C S9500 Series Routing Switches

1.4.2 Port States

In an aggregation group, ports can be in selected or standby state. Only the selected
ports can transmit and receive user service packets. The selected port with the least
port number serves as the master port, while others as member ports (also known as
slave ports).
Whether a port in an aggregation group is in selected or standby state is determined by
the following rules.
Based on the descending order of priority levels from full duplex/high speed, full
duplex/low speed, half duplex/high speed, to half duplex/low speed, the system
sets the ports with the highest priority to selected state, and others to standby
state.
The ports that cannot aggregate with the master port due to hardware limit are in
standby state.
The ports with their basic configurations different from the configuration of the
master port are in standby state.
An aggregation group can only accommodate a limited number of ports. If the number
of selected ports in an aggregation group exceeds that allowed by the group, the ports
with smaller port numbers are selected ports and others are standby ports. Selected
ports can forward user packets, but the standby ports cannot.
A load sharing aggregation group can contain multiple selected ports, but a non-load
sharing aggregation group can have only one selected port, with other ports being
standby ports.

1.5 Link Aggregation Configuration

The following sections describe link aggregation tasks:
Enabling/Disabling LACP on a Port
Configuring the LACP Slow Period Timer
Creating/Removing an Aggregation Group
Adding/Removing an Ethernet Port to/from an Aggregation Group
Enabling Aggregation Resource Extension
Configuring Aggregation Group Description
Configuring System Priority
Configuring Port Priority
Chapter 1 Link Aggregation Configuration
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