HPE FlexFabric 12900E Series Configuration Manual page 15

Figure 9 LACP MAD scenario
Intermediate device
Master
BFD MAD
BFD MAD detects multi-active collisions by using BFD.
You can use common or management Ethernet ports for BFD MAD.
If management Ethernet ports are used, BFD MAD has the following requirements:
•
An intermediate device is required and each IRF member device must have a BFD MAD link to
the intermediate device.
•
Each member device is assigned a MAD IP address on the master's management Ethernet
port.
If common Ethernet ports are used, BFD MAD has the following requirements:
•
If an intermediate device is used, each member device must have a BFD MAD link to the
intermediate device. If no intermediate device is used, all member devices must have a BFD
MAD link to each other. As a best practice, use an intermediate device to connect IRF member
devices if the IRF fabric has more than two member devices. A full mesh of IRF members might
cause broadcast loops.
•
Ports on BFD MAD links are assigned to a VLAN or Layer 3 aggregate interface used for BFD
MAD. Each member device is assigned a MAD IP address on the VLAN interface or Layer 3
aggregate interface.
The BFD MAD links, BFD MAD VLAN, and BFD MAD VLAN interface (or Layer 3 aggregate
interface) must be dedicated. Do not use the BFD MAD links, BFD MAD VLAN, or BFD MAD VLAN
interface (or Layer 3 aggregate interface) for any other purposes.
Customer
premise
network
LACP-enabled dynamic
link aggregation
IRF
fabric
IRF link
Internet
Common traffic path
LACP MAD traffic path
LACP-enabled dynamic
link aggregation
Subordinate
11