HP 6125G HP 6125G & 6125G/XG Blade Switches IRF Configuration Guide-R2 - Page 23

Configuring IRF bridge MAC persistence

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Step 1. Enter system view. 2. Configure the description of a member. Command Remarks system-view N/A irf member member-id description text By default, no member switch description is configured. 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 interruption. Depending on your network condition, enable the IRF fabric to preserve 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 persists for six minutes after the master leaves. If the master does not come back 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 change the bridge MAC persistence setting from permanent to any other mode, you must make sure the master device at the time when permanent persistence was enabled is still in the IRF fabric, whether as the master or a subordinate. To configure the IRF bridge MAC persistence setting: Step 1. Enter system view. Command system-view Remarks N/A 19

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19
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Configure the description of
a member.
irf member
member-id
description
text
By default, no member switch
description is configured.
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 interruption.
Depending on your network condition, enable the IRF fabric to preserve 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 persists for six minutes after
the master leaves. If the master does not come back 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 change the bridge MAC persistence setting from permanent to any other mode, you must make sure
the master device at the time when permanent persistence was enabled is still in the IRF fabric, whether
as the master or a subordinate.
To configure the IRF bridge MAC persistence setting:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A