H3C Technologies H3C S12500 Series Switches - Manual (Page 37)

29
Enabling software auto-update for system software image
synchronization
The software auto-update function automatically propagates the system software image of the master to
all members in the IRF fabric.
To join an IRF fabric, a device must use the same system software image as the master in the fabric.
When you add a device to the IRF fabric, the software auto-update function compares the system
software versions of the device and the IRF master. If the versions are different, the device automatically
downloads the system software image from the master, sets the downloaded image as the system
software for the next reboot, and automatically reboots with the new system software image to rejoin the
IRF fabric.
If software auto-update is disabled, you must manually update the device with the system software image
of the master.
Configuration guidelines
Before you use the software auto-update function, follow these configuration prerequisites:
• The device you are adding to the IRF fabric is compatible with the software version running on the
master. If it is not compatible, the automatic system software upgrading function cannot correctly
work.
• The flash memory or CF card on the device you are adding to the IRF fabric has sufficient space for
the new system software image.
• During auto upgrade of system software image, make sure all IRF links are OK and do not install,
remove, or reboot the MPUs of member devices.
Configuration procedure
To enable an IRF fabric to automatically synchronize the software image of the master to the devices you
are adding to the IRF fabric:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable software
auto-update.
irf auto-update enable
Optional.
By default, this function is
enabled.
Setting the IRF link down report delay
You can avoid link flapping causing frequent IRF splits and merges during a short time by configuring the
IRF ports to delay reporting link down events. An IRF port works as follows:
• When the IRF link changes from up to down, the port does not immediately report the change to the
IRF fabric. If the IRF link state is still down when the delay time is reached, the port reports the
change to the IRF fabric.
• When the IRF link changes from down to up, the link layer immediately reports the event to the IRF
fabric.
To set the IRF link down report delay: