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Operation Manual – HA
H3C S9500 Series Routing Switches
When configuring HA, go to these sections for information you are interested in:
Introduction to HA
Configuring HA
Displaying and Maintaining HA
HA Configuration Example
1.1 Introduction to HA
High Availability (HA for short) feature can be used to achieve a higher degree of
system availability. Devices supporting HA are normally equipped with two Switching
and Routing Process Units (SRPU for short), with one being the active main board
(AMB) that works under master mode and the other being the standby main board
(SMB) that works under slave mode. With the synchronization function the SMB can
work under the same system configuration. Thus, in the event of an AMB failure, the
SMB will immediately switch over to function as an AMB (referred to as switchover
hereafter), ensuring that the device works properly and its configuration is
synchronized with that of the AMB.
Switchover occurs in the following cases:
AMB failure
The AMB is plugged out
SNMP
Manual switchover
A switchover takes place in the following order in the event of an AMB failure:
1)
The SMB automatically connects and controls system bus while the original AMB
disconnects from it.
2)
The original SMB becomes the new AMB whereas the original AMB automatically
reboots and functions as the new SMB.
We discuss switchover through user command line in this chapter.
1.2 Configuring HA
Enter system view
Ignore version check of
the AMB and SMB
Chapter 1 HA Configuration
To do...
system-view
ha
slave-ignore-version-ch
eck
Use the command...
1-1
Chapter 1 HA Configuration
Remarks
—
Optional
Version check is enabled
by default.
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