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Enabling software auto-update for system
software image synchronization
To join an IRF fabric, a switch must use the same system software image as the master in the fabric.
The software auto-update function automatically propagates the system software image of the
master to all members in the IRF fabric. If software auto-update is disabled, you must manually
update the switch with the system software image of the master.
When you add a switch to the IRF fabric, the software auto-update function compares the system
software versions of the switch and the IRF master. If the versions are different, the switch performs
the following tasks automatically:
1.
Downloads the system software image from the master.
2.
Sets the downloaded image as the system software for the next startup.
3.
Reboots with the new system software image to rejoin the IRF fabric.
Before you use the software auto-update function, make sure the following requirements are met:
•
The switch you are adding to the IRF fabric is compatible with the software version running on
the master. If the software versions are incompatible, the software auto-update function cannot
correctly work.
•
The switch you are adding to the IRF fabric has sufficient space for the new system software
image.
To enable the IRF fabric to automatically synchronize the system software of the master to the switch
you are adding to the IRF fabric:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable the software
auto-update function.
irf auto-update enable
By default, this function is
disabled.
In an IRF fabric enabled with software auto-update, if a software upgrade requires upgrading the
Boot ROM image, use the following upgrading procedure:
1.
Download the new system software image to the master device.
2.
Use the
bootrom update
command to upgrade the Boot ROM image on the master.
This step guarantees that the master can complete startup prior to other member switches.
3.
Use the
boot-loader file
file
-
url
slot
slot-number
main
command to specify the system
software image as the startup image for the master.
4.
Reboot the entire IRF fabric to complete upgrading software.
For the system software image and Boot ROM compatibility, see the release notes for the new
software release.
Setting the IRF link down report delay
To prevent frequent IRF splits and merges at times of link flapping, configure 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.
