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- Table of Contents
-
- H3C S9500 Operation Manual-Release2132[V2.03]-08 System Volume
- 00-1Cover
- 01-GR Configuration
- 02-VRRP Configuration
- 03-HA Configuration
- 04-Device Management Configuration
- 05-NQA Configuration
- 06-NetStream Configuration
- 07-NTP Configuration
- 08-RMON Configuration
- 09-SNMP Configuration
- 10-File System Management Configuration
- 11-System Maintaining and Debugging Configuration
- 12-Basic System Configuration
- 13-Information Center Configuration
- 14-User Interface Configuration
- 15-MAC Address Table Management Configuration
- 16-PoE Configuration
- 17-Clock Monitoring Configuration
- Related Documents
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| Title | Size | Download |
|---|---|---|
| 03-HA Configuration | 36.5 KB |
1.3 Displaying and Maintaining HA
1.4.1 Dynamic Upgrade of the System Through HA
1.4.2 Full Mesh Forwarding Mode Configuration Example
Chapter 1 HA Configuration
When configuring HA, go to these sections for information you are interested in:
l Displaying and Maintaining HA
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:
l AMB failure
l The AMB is plugged out
l SNMP
l 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
|
To do… |
Use the command… |
Remarks |
|
Enter system view |
system-view |
— |
|
Ignore version check of the AMB and SMB |
ha slave-ignore-version-check |
Optional Version check is enabled by default. |
|
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:
l 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.
l 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.
l A switchover capable device cannot be updated with a software specific with centralized device as this will result in an unavailable system.
l If only one SRPU is in the slot, the Full Mesh enhance mode does not take effect.
l The S9505 switch does not support the fullmesh-enhance command.
l When the system works in load balancing mode, it activates the Full Mesh enhance mode if this mode is configured.
l 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 switch the system to the load balancing mode to activate the Full Mesh enhance mode.
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
[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
l Two SRPUs work in active and standby mode.
l 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
