Configuring bfd mad – H3C Technologies H3C S10500 Series Switches User Manual
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To do…
Use the command…
Remarks
Configure the aggregation group
to work in dynamic aggregation
mode
link-aggregation mode dynamic
Required
By default, the aggregation
group works in static
aggregation mode.
Enable LACP MAD detection
mad enable
Required
Disabled by default.
Even though this command can
be configured on both static and
dynamic aggregate interfaces, it
takes effect only on dynamic
aggregate interfaces. This is
because this detection approach
depends on LACP.
Return to system view
quit
—
Enter Ethernet interface view
interface interface-type
interface-number
—
Assign the current Ethernet
interface to the specified
aggregation group
port link-aggregation group number
Required
Configuring BFD MAD
1.
BFD MAD detection mechanism
BFD MAD is implemented with the BFD protocol. To configure BFD MAD detection, configure a MAD IP
address on a BFD-enabled Layer 3 interface for each member switch. This MAD address identifies the
member during BFD MAD detection. The MAD IP addresses assigned to the member switches must
belong to the same network segment.
•
When the IRF fabric is operating normally, only the MAD IP address of the master is effective and
the BFD session is down.
•
When the IRF fabric partitions, the MAD IP addresses of the masters in different IRF fabrics become
effective to activate the BFD sessions to detect for multi-active IRF fabric collision.
2.
Network requirements
BFD MAD detection can work with or without intermediate switches. In a BFD MAD network without an
intermediate switch, connect all IRF member switches with dedicated BFD MAD links in the full mesh
topology, as shown in
. The interfaces connected by BFD MAD links must belong to the same
VLAN. In VLAN interface view, assign different IP addresses on the same network segment for different
member switches.
CAUTION:
A Layer 3 interface used for BFD MAD must be dedicated. Do not configure any other services on them.
Otherwise, both the configured services and the BFD MAD detection function can be affected.
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