Configuring Irf Bridge Mac Persistence; Enabling Software Auto-Update For System Software Image Synchronization - H3C S5120-EI Series Configuration Manual

Configuring IRF bridge MAC persistence

An IRF fabric by default uses the bridge MAC address of the master switch as its bridge MAC address.
This bridge MAC address is used by Layer 2 protocols, for example, LACP, to identify the IRF fabric, and
must be unique on a switched LAN for proper communication.
To avoid duplicate bridge MAC addresses, an IRF fabric can automatically change its bridge MAC
address after its master leaves, but the change can cause transient traffic disruption.
Depending on your network condition, enable the IRF fabric to retain or change its bridge MAC address
after the master leaves. Available options include:
irf mac-address persistent timer—Bridge MAC address of the IRF fabric is retained for six minutes
•
after the master leaves. If the master does not return before the timer expires, the IRF fabric uses the
bridge MAC address of the new master as its bridge MAC address. This option avoids unnecessary
bridge MAC address change due to a device reboot, transient link failure, or purposeful link
disconnection.
irf mac-address persistent always—Bridge MAC address of the IRF fabric does not change after
•
the master leaves.
undo irf mac-address persistent—Bridge MAC address of the new master replaces the original one
•
as soon as the old master leaves.
IMPORTANT:
If ARP MAD is used, configure the undo irf mac-address persistent command to enable immediate bridge
MAC address change after a master leaves.
If two IRF fabrics have the same bridge MAC address, they cannot merge.
To configure the IRF bridge MAC persistence setting:
Step
1. Enter system view.
2. Configure IRF bridge MAC
persistence.
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.
Command
system-view
•
Retain the bridge MAC address
even if the master has changed:
irf mac-address persistent always
•
Preserve the bridge MAC address
for six minutes after the master
leaves:
irf mac-address persistent timer
•
Change the bridge MAC address
as soon as the master leaves:
undo irf mac-address persistent
19
Remarks
N/A
By default, the IRF fabric's
bridge MAC address is retained
permanently even after the
master leaves.