HP FlexFabric 12900 Series Configuration Manual page 30

Table 1 provides a reference for you to make a MAD mechanism selection decision.
Table 1 Comparison of MAD mechanisms
MAD
mechanism
LACP MAD
BFD MAD
Configuring LACP MAD
When you use LACP MAD, follow these guidelines:
The intermediate device must be an HP device that support extended LACP for MAD.
•
If the intermediate device is also an IRF fabric, assign the two IRF fabrics different domain IDs for
•
correct split detection.
Use dynamic link aggregation mode. MAD is LACP dependent. Even though LACP MAD can be
•
configured on both static and dynamic aggregate interfaces, it takes effect only on dynamic
aggregate interfaces.
• Configure link aggregation settings also on the intermediate device.
To configure LACP MAD:
Step
1. Enter system view.
2. Assign a domain ID to the IRF
fabric.
Advantages
•
Detection speed is fast.
•
Does not require
MAD-dedicated physical
links or Layer 3 interfaces.
•
Detection speed is fast.
•
No intermediate device is
required.
•
Intermediate device, if used,
can come from any vendor.
Command
system-view
irf domain domain-id
Disadvantages
Requires an intermediate HP
device that supports
extended LACPDUs for
MAD.
•
Requires MAD dedicated
physical links and Layer 3
interfaces, which cannot
be used for transmitting
user traffic.
•
If no intermediate device
is used, the IRF members
must be fully meshed.
•
If an intermediate device
is used, every IRF
member must connect to
the intermediate device.
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Application scenario
Link aggregation is used
between the IRF fabric
and its upstream or
downstream device.
For information about
LACP, see Layer 2—LAN
Switching Configuration
Guide.
•
No special
requirements for
network scenarios.
•
If no intermediate
device is used, this
mechanism is only
suitable for IRF fabrics
that have members
that are
geographically close
to one another.
For information about
BFD, see High
Availability
Configuration Guide.
Remarks
N/A
The default IRF domain ID is 0.