3Com Switch 8800 Advanced Software V5 Configuration Guide

1114 CHAPTER 87: HIGH AVAILABILITY CONFIGURATION
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CAUTION:
■ The standby card does not support any system configuration commands.
Therefore, users cannot execute any commands in the standby card unless it
has replaced the original active card and has become the new active card.
■ After the standby card has restarted, the active card will perform initial
synchronization on the standby card. 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 active card and the active card and standby card will keep a
real-time synchronization process, meaning the configuration of the user on
the active card will be copied to the standby card to ensure the consistency of
the current configuration of the active card and standby card.
■ A switch over capable device cannot be updated with a software specific with
centralized device as this will result in an unavailable system.
■ If only one Fabric is in the slot, the Full Mesh enhance mode does not take
effect.
■ The Switch 8807 switch does not support the fullmesh-enhance command.
■ When the system works in load balancing mode, it activates the Full Mesh
enhance mode if this mode is configured.
■ 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.
Displaying and
Maintaining HA
HA Configuration
Example
Dynamic Upgrade of the
System Through HA
Configuration prerequisites
Dynamic upgrade of image files of the active card and standby card.
Manually configure
switchover between the active
card and standby card
slave switchover Optional
Manually configure the
standby card restart
slave restart Optional
Enable Full Mesh forwarding
enhance mode
fullmesh-enhance { enable |
disable }
Optional
Disabled by default.
To do... Use the command... Remarks
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