20
View
VLAN interface view
Default level
3: Manage level
Parameters
None
Description
Use
mad bfd enable
to enable BFD MAD.
Use
undo mad bfd enable
to disable BFD MAD.
By default, BFD MAD is disabled.
BFD MAD uses the BFD protocol for detecting multi-active collisions, and can work with or without
intermediate devices.
When you configure BFD MAD, follow these guidelines:
•
You cannot enable BFD MAD detection on VLAN-interface 1.
•
Do not use the BFD MAD VLAN for any other purpose. No Layer 2 or Layer 3 features, including
ARP and LACP, can work on the BFD MAD-enabled VLAN interface or any port in the VLAN. If you
configure any other feature on the VLAN, neither the configured feature nor the BFD MAD function
can work correctly.
•
Do not enable the spanning tree function on any port in a BFD MAD VLAN. The MAD function is
mutually exclusive with the spanning tree function.
•
Do not bind a BFD MAD-enabled VLAN interface to any VPN. The MAD function is mutually
exclusive with VPN.
•
To avoid problems, make sure a BFD MAD-enabled VLAN interface has only IP addresses assigned
with the
mad ip address
command. Do not use any other command, including the
ip address
command, to assign an IP address to the interface.
•
If an intermediate device is used, assign the ports of BFD MAD links to the BFD MAD VLAN on the
device.
Related commands:
mad ip address
.
Examples
# Enable BFD MAD on VLAN-interface 3.
<Sysname> system-view
[Sysname] interface vlan-interface 3
[Sysname-Vlan-interface3] mad bfd enable
mad enable
Syntax
mad enable
undo mad enable
View
Layer 2 aggregate interface view, Layer 3 aggregate interface view
