Enabling Auto Upgrade Of Boot Files - 3Com 4510G Configuration Manual

In an IRF, the bridge MAC address of a member device is called member bridge MAC address. The
IRF communicates with the outside as a single device; therefore, it also has a bridge MAC address,
which is called the IRF bridge MAC address. Typically, an IRF uses the bridge MAC address of the
master device as the IRF bridge MAC address.
You are recommended to configure the preservation time of IRF bridge MAC address properly,
otherwise, network problems will occur:
If a master leaves an IRF to join another IRF or to operate independently and the IRF is
configured to preserve the bridge MAC address permanently, bridge MAC address collision
occurs and thus causes network communication problem.
If the master leaves the IRF because of reboot or link failure and the IRF is configured to change
the IRF bridge MAC address as soon as the master leaves, the unnecessary switch of bridge
MAC address occurs and thus causes flow interruption.
Therefore, configure the preservation time IRF bridge MAC address according to your network status:
Preserve for six minutes: After the master leaves, the bridge MAC address will not change within
six minutes. If the master does not come back after six minutes, the IRF system will use the bridge
MAC address of the newly elected master as that of the IRF.
Preserve permanently: No matter the master leaves the IRF or not, the IRF bridge MAC address
remains unchanged.
Not preserved: As soon as the master leaves, the system will use the bridge MAC address of the
newly elected master as that of the IRF.
Follow these steps to specify preservation time of IRF bridge MAC address:
To do...
Enter system view
Configure the IRF bridge MAC
address to be preserved permanently
after the master leaves
Specify the preservation time of the
IRF bridge MAC address as 6
minutes after the master leaves
Configure that the IRF bridge MAC
address changes as soon as the
master leaves
The change of the bridge MAC address may cause a temporary flow interruption.

Enabling Auto Upgrade of Boot Files

If this function is disabled, when the boot files of slaves and that of the master are in different versions,
the new member or the member with a low priority will not boot normally. You need to update the
device version manually and add the device into the IRF again.
Use the command...
system-view
irf mac-address persistent
always
irf mac-address persistent timer
undo irf mac-address persistent
25-15
Remarks
—
Optional
By default, IRF
bridge MAC
address is
preserved for 6
minutes after the
master leaves.