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To set the IRF link down report delay:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Set the IRF link down
report delay.
irf link-delay
interval
The default IRF link down report delay is 4
seconds.
Hewlett Packard Enterprise recommends
setting the delay to 0 seconds in the
following situations:
• The IRF fabric requires a fast
master/subordinate or IRF link
switchover.
• The BFD or GR feature is used.
Configuring MAD
The following MAD mechanisms are available for detecting multi-active collisions in different network
scenarios:
• LACP MAD
• BFD MAD
• ARP MAD
These MAD detection mechanisms operate independently. You can configure all of them for an IRF
fabric.
Table 3 provi
des a reference for you to make a MAD mechanism selection decision.
Table 3 A comparison of the MAD mechanisms
MAD
mechanism
Advantages Disadvantages Application scenario
LACP MAD
• Detection speed is fast.
• Requires no
MAD-dedicated physical
ports or interfaces.
Requires an intermediate
HPE device that supports
LACP MAD packets.
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.
BFD MAD
• Detection speed is fast.
• No intermediate device is
required.
• Intermediate device, if
used, can come from any
vendor.
• Requires MAD
dedicated physical
ports 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.
• No special
requirements for
network scenarios.
• If no intermediate
device is used, this
mechanism is only
suitable for IRF
fabrics that have a
small number of
members that are
geographically
close to one
another.
For information about
BFD, see High
Availability Configuration
Guide.
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