H3C S9500E Series Configuration Manual page 32

With LACP MAD, an IRF member switch sends extended LACP data units (LACPDUs) with a type length
value (TLV) that conveys the domain ID and active ID of the IRF fabric for detecting an IRF split. The
domain ID uniquely identifies an IRF device in the network, and the active ID is identical to the member
ID of the master switch in the IRF fabric.
An IRF member switch compares the domain ID and the active ID in each received extended LACPDU
with its domain ID and active ID:
If the domain IDs are different, the extended LACPDU is from a different IRF fabric, and the switch
•
does not continue to process the extended LACPDU with the MAD mechanism.
If the domain IDs are the same, the switch compares the active IDs:
•
If the active IDs are different, the IRF fabric has split.
If the active IDs are the same, the IRF fabric is operating normally.
Network requirements
2.
Every IRF member switch has a link with an intermediate switch, and all these links form a dynamic link
aggregation group, as shown in
The intermediate switch must be an H3C switch capable of handling extended LACPDUs that carry the
Active ID field. For more information about LACP and the support of the switch for extended LACPDUs,
see Layer 2—LAN Switching Configuration Guide.
CAUTION:
If the intermediate switch is in an IRF fabric, you must assign this fabric a different domain ID than the
LACP MAD-enabled fabric to avoid false detection of IRF partition.
Figure 9.
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