Chapter 2 Ha Configuration; Ha Overview - H3C S7500 Series Operation Manual

Operation Manual – VRRP-HA
H3C S7500 Series Ethernet Switches
When configuring HA, go to these sections for information you are interested in:

HA Overview

HA Configuration
Displaying HA
2.1 HA Overview
S7506R supports high availability (HA) feature. This feature is to achieve a high
availability of the system and to recover the system quickly in the event of failures so as
to shorten the mean time between failure (MTBF).
The functions of HA are mainly implemented by the application running on SRPU board.
An S7506R switch has two SRPUs, which are working in the master/slave mode: one
board works in master mode as the master board, the other works in slave mode as a
backup board. If the master/slave system detects a fault in the master board, a
master/slave switchover will be performed automatically. The slave board will try to
connect with and control the system bus while the original master board will try to
disconnect from the bus. Thus, the master/slave switchover of the active system is
completed, and at the same time the original master board is reset to function as the
slave board. Therefore, even if the master board fails, the slave board can also take its
role to ensure the normal operation of the S7506R switch.
S7506R supports hot swap of SRPUs. The hot swap of master boards will cause
master/slave switchover.
S7506R supports manually master/slave switchover. You can change the current board
state manually by executing commands.
Caution:
The HA feature of the S7506R switches can realize the software upgrade of the two
SRPUs with at least one SRPU being active. However, the SRPU and the LPU of the
Ethernet switches must be identical in their software version, otherwise they cannot
work normally. Therefore, during the upgrade, you are recommended to restart the
whole switch after the SRPU executes the boot boot-loader command to ensure
normal operating of the switch.

Chapter 2 HA Configuration

2-1
Chapter 2 HA Configuration