17
Category Restrictions
and
guidelines
•
If you are using an intermediate device, perform the following tasks:
{
On the IRF fabric and the intermediate device, create a VLAN for
ARP MAD.
{
On the IRF fabric and the intermediate device, assign the ports of
ARP MAD links to the ARP MAD VLAN.
{
On the IRF fabric, create a VLAN interface for the ARP MAD VLAN.
•
As a best practice, do not use the ARP MAD VLAN for any other
purposes.
ARP MAD and feature
configuration
If an intermediate device is used, make sure the following requirements are
met:
•
Run the spanning tree feature between the IRF fabric and the
intermediate device to ensure that there is only one ARP MAD link in
forwarding state. For more information about the spanning tree feature
and its configuration, see
Layer 2—LAN Switching Configuration Guide
.
•
Enable the IRF fabric to change its bridge MAC address as soon as the
address owner leaves.
•
If the intermediate device is also an IRF fabric, assign the two IRF fabrics
different domain IDs for correct split detection.
When you configure ARP MAD on a management Ethernet port, follow these restrictions and
guidelines:
Category Restrictions
and
guidelines
Management Ethernet
ports for ARP MAD
Connect a management Ethernet port on each member device to the
common Ethernet ports on the intermediate device.
ARP MAD VLAN
On the intermediate device, create a VLAN for ARP MAD, and assign the
ports used for ARP MAD to the VLAN. On the IRF fabric, you do not need to
assign the management Ethernet ports to the VLAN.
ARP MAD and feature
configuration
•
Enable the IRF fabric to change its bridge MAC address as soon as the
address owner leaves.
•
If the intermediate device is also an IRF fabric, assign the two IRF fabrics
different domain IDs for correct split detection.
When you use the
mad arp 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 by using the following
commands:
irf domain
,
mad enable
,
mad arp enable
, or
mad nd enable
. The IRF domain
IDs configured by using these commands overwrite each other.
Examples
# Enable ARP MAD on VLAN-interface 3.
<Sysname> system-view
[Sysname] interface vlan-interface 3
[Sysname-Vlan-interface3] mad arp enable
You need to assign a domain ID (range: 0-4294967295)
[Current domain is: 0]: 1
The assigned domain ID is: 1
Related commands
irf domain
