H3C S9500E Series Configuration Manual page 34

To do...
Enable LACP MAD detection
Return to system view
Enter Ethernet interface view
Assign the
interface
aggregation group
Configuring BFD MAD
BFD MAD detection mechanism
1.
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 operates normally, only the MAD IP address of the master is effective and the
•
BFD session is down. You can use the display bfd session command to display the status of BFD
sessions. The Session State field shows the session status.
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.
Network requirements
2.
If the IRF fabric has only two member switches, BFD MAD detection can work with or without
intermediate switches. In a BFD MAD network without an intermediate switch, connect the IRF member
switches with a dedicated BFD MAD link, as shown in
MAD link must belong to the same VLAN. In VLAN interface view, assign different IP addresses on the
same network segment for different member switches.
If the IRF fabric has three or four member switches, there must be intermediate switches. In a BFD MAD
network with an intermediate switch, connect each IRF member switch to the intermediate switch with a
dedicated BFD MAD link, as shown in
belong to the same VLAN, and you must assign different IP addresses on the same network segment for
different member switches' VLAN interfaces.
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.
Use the command...
mad enable
quit
interface
interface-number
current Ethernet
to the specified port link-aggregation group number
interface-type
Figure 10. The interfaces connected by the BFD
Figure 1 1. The interfaces connected by BFD MAD links must
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Remarks
Required
Disabled by default.
This command can
configured on both static and
dynamic aggregate interfaces,
but it takes effect only on
dynamic aggregate interfaces.
This is because this detection
approach depends on LACP.
—
—
Required
be