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Restrictions and guidelines
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
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:
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
command instead of the
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.
When you configure BFD MAD on a Layer 3 aggregate interface, follow these restrictions and
guidelines:
Restrictions and guidelines
BFD MAD-enabled Layer 3
aggregate interface
• Make sure the Layer 3 aggregate interface operates in static
aggregation mode.
•
Make sure the member ports in the aggregation group do not exceed the
maximum number of Selected ports allowed for an aggregation group. If
the number of member ports exceeds the maximum number of Selected
ports, some member ports cannot become Selected. BFD MAD will be
unable to work correctly and its state will change to Faulty.
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