A10E/A28E/A28F Configuration Guide
7 Reliability
This chapter introduces basic principle and configuration of reliability and provides related
configuration applications.
Link aggregation
Interface backup
Failover
STP
MSTP
ERPS
RRPS
7.1 Link aggregation
7.1.1 Introduction
With link aggregation, multiple physical Ethernet interfaces are combined to form a logical
aggregation group. Multiple physical links in one aggregation group are taken as a logical link.
The link aggregation helps share traffics among members in an aggregation group. In addition
to effectively improve the reliability on links between devices, the link aggregation can help
gain higher bandwidth without upgrading hardware.
In general, the link aggregation consists of manual link aggregation, static Link Aggregation
Control Protocol (LACP) link aggregation, and dynamic LACP link aggregation.
Manual link aggregation
Manual link aggregation refers to a process that multiple physical interfaces are aggregated to
a logical interface. Links under a logical interface share loads.
Static LACP link aggregation
Link Aggregation Control Protocol (LACP) is a protocol based on IEEE802.3ad. LACP
communicates with the peer through the Link Aggregation Control Protocol Data Unit
(LACPDU). In addition, you should manually configure the link aggregation group. After
LACP is enabled on an interface, the interface sends a LACPDU to inform the peer of its
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