Operation Manual – HA
H3C S9500 Series Routing Switches Table of Contents
i
Table of Contents
Chapter 1 HA Configuration.........................................................................................................1-1
1.1 Introduction to HA..............................................................................................................1-1
1.2 Configuring HA...................................................................................................................1-1
1.3 Displaying and Maintaining HA.......................................................................................... 1-3
1.4 HA Configuration Examples...............................................................................................1-3
1.4.1 Dynamic Upgrade of the System Through HA........................................................ 1-3
1.4.2 Full Mesh Forwarding Mode Configuration Example..............................................1-4
Operation Manual – HA
H3C S9500 Series Routing Switches Chapter 1 HA Configuration
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Chapter 1 HA Configuration
When configuring HA, go to these sections for information you are interested in:
z Introduction to HA
z Configuring HA
z Displaying and Maintaining HA
z 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:
z AMB failure
z The AMB is plugged out
z SNMP
z Manual switchover
A switchover t akes 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
To do… Use the command… Remarks
Enter system view
system-view
—
Ignore version check of
the AMB and SMB
ha
slave-ignore-version-ch
eck
Optional
Version check is enabled
by default.
Operation Manual – HA
H3C S9500 Series Routing Switches Chapter 1 HA Configuration
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To do… Use the command… Remarks
Enable the manual
switchover between the
AMB and SMB
slave switchover
[ enable ]
Optional
Enabled by default
Manually configure
switchover between the
AMB and SMB
slave switchover
Optional
Manually configure the
SMB restart
slave restart
Optional
Enable Full Mesh
forwarding enhance mode
fullmesh-enhance
{ enable | disable }
Required
Disabled by default.
Caution:
z The SMB does not support any system configuration commands. Therefore, users
cannot execute any commands in the SMB unless it has replaced the original AMB
and has become the new AMB.
z After the SMB has restarted, the AMB will perform initial synchronization on the
SMB. During this process if the user presses <Enter>, the system will prompt the
user no command can be input. After the initial synchronization is completed, the
user can execute all the configuration commands in the AMB and the AMB and SMB
will keep a real-time synchronization process, meaning the configuration of the user
on the AMB will be copied to the SMB to ensure the consistency of the current
configuration of the AMB and SMB.
z A switchover capable device cannot be updated with a software specific with
centralized device as this will result in an unavailable system.
z If only one SRPU is in the slot, the Full Mesh enhance mode does not take effect.
z The S9505 switch does not support the fullmesh-enhance command.
z When the system works in load balancing mode, it activates the Full Mesh enhance
mode if this mode is configured.
z When the system works in active and standby mode, it does not activate the Full
Mesh enhance mode if this mode is configured. In this case, you need to swit ch the
system to the load balancing mode to activate the Full Mesh enhance mode.
Operation Manual – HA
H3C S9500 Series Routing Switches Chapter 1 HA Configuration
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1.3 Displaying and Maintaining HA
To do… Use the command… Remarks
Display the switchover
state
display switchover state
[ slot-id ]
Available in any view
Display Full Mesh
forwarding information
display
fullmesh-enhance
Available in any view
1.4 HA Configuration Examples
1.4.1 Dynamic Upgrade of the System Through HA
I. Configuration prerequisites
Dynamic upgrade of image files of the AMB and SMB.
II. Configuration procedure
1) Download the update software
Through remote online update commands, download new application program to the
AMB. Use the FTP, TFTP, or XModem to download the application program to the AMB
and save it in the flash.
2) Copy the software to the SMB
Assume the update application is test.app, slot 0 is the AMB, and slot 1 is the SMB.
<Sysname> copy test.app slot1#flash:/test.app
3) Designate the newly downloaded update application to be the executive software
of the AMB and SMB.
<Sysname> boot-loader file flash:/test.app slot 0 main
<Sysname> boot-loader file slot1#flash:/test.app slot 1 main
4) Restart the SMB.
<Sysname> system-view
[Sysname] slave restart
The slave will reset! Continue?[Y/N]:y
5) Copy the configuration file to the SMB.
If the SMB is working properly , system will prompt that it is in an active state. As long as
the auto-update function is enabled, the configuration file will be copied to the SMB
while the AMB is saving the same file.
[Sysname] slave auto-update config
[Sysname] quit
<Sysname> save
6) Manually configure the switch over between the AMB and SMB.
<Sysname> system-view
Operation Manual – HA
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[Sysname] slave switchover
Caution!!! Confirm switch slave to master[Y/N]?y
After the switchover, the original AMB will reset, restart, and update its application file.
Thus, the whole system has its application upgraded dynamically.
1.4.2 Full Mesh Forwarding Mode Configuration Example
I. Configuration prerequisites
z Two SRPUs work in active and standby mode.
z Set the Full Mesh forwarding to enhance mode to optimize the Full Mesh
forwarding performance in the system.
II. Configuration procedure
# Enter system view.
<Sysname> system-view
# Switch to load balancing mode.
[Sysname] xbar load-balance
# Enable Full Mesh mode.
[Sysname] fullmesh-enhance enable
# Check whether Full Mesh mode is activated.
[Sysname] display fullmesh-enhance
Configuration status: Enabled
Operation status: Active
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