Consistency Considerations For Ports In An Aggregation Group - H3C S9500 Series Operation Manual

Operation Manual – Link Aggregation
H3C S9500 Series Routing Switches
1.1.1 LACP
The link aggregation control protocol (LACP) is defined in IEEE 802.3ad. LACP
interacts with its peer by sending link aggregation control protocol data units
(LACPDUs).
Adding a port to a static LACP aggregation group enables LACP on the port. Then, the
port sends LACPDUs to notify the remote system of its system LACP priority, system
MAC address, port LACP priority, port number, and operational key. Upon receipt of an
LACPDU, the remote system compares the received information with the information
received on other ports to determine the ports that can operate as selected ports. This
allows the two systems to reach an agreement on the states of the related ports.
When aggregating ports, link aggregation control automatically assigns each port an
operational key based on its rate, duplex mode, and other basic configurations. In a
manual or static LACP aggregation, the selected ports share the same operational key.

1.1.2 Consistency Considerations for Ports in an Aggregation Group

To participate in load sharing, member ports in an aggregation group must use the
same configurations with respect to STP, QoS, GVRP, QinQ, BPDU tunnel, VLAN, port
attributes, MAC address learning, and so on, as shown in the following table. These
configurations are referred to as aggregation-related configurations throughout this
manual.
Table 1-1 Consistency considerations for ports in an aggregation
Category
STP
QoS
GVRP
State of port-level STP (enabled or disabled)
Attribute of the link (point-to-point or otherwise) connected to the
port
Port path cost
STP priority
Maximum transmission rate
Loop protection
Root protection
Port type (whether the port is an edge port)
Traffic policing
Traffic shaping
Congestion avoidance
Strict priority (SP) queuing
Port priority
Port priority trust mode
Policy setting on the port
Flow template
GVRP state on ports (enabled or disabled)
GVRP registration type
GARP timers
1-2
Chapter 1 Link Aggregation Overview
Considerations