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R21xx-HP FlexFabric 11900 IRF Command Reference

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• 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 the VLAN interface to any VPN. The MAD function is mutually exclusive with VPN.
• To avoid problems, only use the mad ip address command to configure IP addresses on the BFD
MAD-enabled VLAN interface. For example, an IP address configured with the ip address
command or a VRRP virtual IP address can cause problems.
• If an intermediate device is used, you must assign the ports of the BFD MAD links to the BFD MAD
VLAN on the intermediate device.
Examples
# Enable BFD MAD on VLAN-interface 3.
<Sysname> system-view
[Sysname] interface vlan-interface 3
[Sysname-Vlan-interface3] mad bfd enable
mad enable
Use mad enable to enable LACP MAD.
Use undo mad enable to disable LACP MAD.
Syntax
mad enable
undo mad enable
Default
LACP MAD is disabled.
Views
Aggregate interface view
Predefined user roles
network-admin
Usage guidelines
LACP MAD handles collisions in a different way than BFD MAD. To avoid conflicts, do not enable LACP
MAD with BFD MAD in an IRF fabric.
LACP MAD uses extended LACP packets for detecting multi-active collisions and requires an intermediate
HP device that also supports LACP MAD packets.
You must set up a dynamic link aggregation group that spans all IRF member devices between the IRF
fabric and the intermediate device. To enable dynamic link aggregation, configure the link-aggregation
mode dynamic command on the aggregate interface.
If the intermediate device is also in an IRF fabric, make sure the two IRF fabrics have different domain IDs
to avoid false detection of IRF splits.
When you use the mad enable command, the system prompts you to enter a domain ID. If you do not
want to change the current domain ID, press enter at the prompt.
An IRF fabric has only one IRF domain ID. You can change the IRF domain ID with the following
commands: irf domain or mad enable. The IRF domain IDs configured with these commands overwrite
each other.