12
If ARP MAD or ND MAD is used, disable IRF bridge MAC persistence by using the
undo irf
mac-address persistent
command.
Use the
irf mac-address persistent always
command on the IRF fabric that meets the following
requirements:
•
The IRF fabric uses a daisy-chain topology.
•
The IRF fabric has aggregate links with upstream or downstream devices.
The persistence setting prevents transmission delay or packet loss after the address owner leaves
the IRF fabric.
By default, an IRF fabric uses the bridge MAC address of the master device as its bridge MAC
address. Layer 2 protocols, such as LACP, use this bridge MAC address to identify the IRF fabric. On
a switched LAN, the bridge MAC address must be unique.
When IRF fabrics merge, IRF ignores the IRF bridge MAC address and checks the bridge MAC
address of each member device in the IRF fabrics. IRF merge fails if any two member devices have
the same bridge MAC address.
After IRF fabrics merge, the merged IRF fabric uses the bridge MAC address of the merging IRF
fabric that won the master election as the IRF bridge MAC address.
To avoid duplicate bridge MAC addresses, an IRF fabric can change its bridge MAC address
automatically after the address owner leaves. However, the change causes temporary service
disruption. Depending on the network condition, you can enable the IRF fabric to retain or change its
bridge MAC address after the address owner leaves.
Examples
# Enable the IRF bridge MAC address to persist forever.
<Sysname> system-view
[Sysname] irf mac-address persistent always
irf member description
Use
irf member description
to configure a description for an IRF member.
Use
undo irf member description
to restore the default.
Syntax
irf member member-id description text
undo irf member
member-id
description
Default
No description is configured for an IRF member device.
Views
System view
Predefined user roles
network-admin
Parameters
member-id
: Specifies the ID of an IRF member.
text
: Configures the IRF member description, a string of 1 to 127 characters.
Usage guidelines
Configure a description to describe the location or purpose of a member device.
