20
Usage guidelines
Do not configure BFD MAD together with ARP MAD or ND MAD, because they handle collisions
differently.
When you configure BFD MAD on a VLAN interface, follow these guidelines:
Category Restrictions
and
guidelines
BFD MAD VLAN
•
Do not enable BFD MAD on VLAN-interface 1.
•
If you are using an intermediate device, perform the following tasks:
{
On the IRF fabric and the intermediate device, create a VLAN for
BFD MAD.
{
On the IRF fabric and the intermediate device, assign the ports of
BFD MAD links to the BFD MAD VLAN.
{
On the IRF fabric, create a VLAN interface for the BFD MAD VLAN.
•
Make sure the IRF fabrics on the network use different BFD MAD
VLANs.
•
Make sure the BFD MAD VLAN contains only ports on the BFD MAD
links. Exclude a port from the BFD MAD VLAN if that port is not on a BFD
MAD link. If you have assigned that port to all VLANs by using the
port
trunk permit vlan all
command, use the
undo port
trunk permit
command to exclude that port from the BFD MAD
VLAN.
BFD MAD VLAN and
feature compatibility
Do not use the BFD MAD VLAN for any purposes other than configuring BFD
MAD.
•
Use only the
mad bfd enable
and
mad ip address
commands
on the BFD MAD-enabled VLAN interface. If you configure other
features, both BFD MAD and other features on the interface might run
incorrectly.
•
Disable the spanning tree feature on any Layer 2 Ethernet ports in the
BFD MAD VLAN. The MAD feature is mutually exclusive with the
spanning tree feature.
MAD IP address
•
To avoid network issues, only use the
mad ip address
command to
configure IP addresses on the BFD MAD-enabled VLAN interface. Do
not configure an IP address by using the
ip address
command or
configure a VRRP virtual address on the BFD MAD-enabled VLAN
interface.
•
Make sure all the MAD IP addresses are on the same subnet.
When you configure BFD MAD that uses management Ethernet ports, follow these restrictions and
guidelines:
Category Restrictions
and
guidelines
Management Ethernet
ports for BFD MAD
Connect a management Ethernet port on each member device to the
common Ethernet ports on the intermediate device.
BFD MAD VLAN
•
On the intermediate device, create a VLAN for BFD MAD, and assign the
ports used for BFD MAD to the VLAN. On the IRF fabric, you do not need
to assign the management Ethernet ports to the VLAN.
•
Make sure the IRF fabrics on the network use different BFD MAD
VLANs.
•
Make sure the BFD MAD VLAN on the intermediate device contains only
ports on the BFD MAD links.
MAD IP address
•
Use
the
mad ip address
command instead of the
ip address
command to configure MAD IP addresses on the BFD MAD-enabled
management Ethernet ports.
•
Make sure all the MAD IP addresses are on the same subnet.
