Lacp Mad - HP 12500 SERIES Configuration Manual

Sets the IRF fabric that has the lowest numbered master to the Active state and all other
4.
fabrics to the Recovery (disabled) state.
Shuts down all physical network ports in the Recovery-state fabrics but their physical IRF ports
5.
and any ports you have specified with the mad exclude interface command.
In contrast, BFD MAD and ARP MAD do not compare the number of members in fabrics. They
directly set the IRF fabric that has the lowest numbered master to the Active state, set all other
fabrics to the Recovery state, and take the same action on the network ports in Recovery-state
fabrics as LACP MAD does.
Failure recovery
To merge two split IRF fabrics, first repair the failed IRF link and remove the IRF link failure.
If the IRF fabric in Recovery state fails before the failure is recovered, repair the failed IRF fabric and
the failed IRF link.
If the IRF fabric in Active state fails before the failure is recovered, first enable the IRF fabric in
Recovery state to take over the active IRF fabric and protect services from being affected. After that,
recover the MAD failure.

LACP MAD

LACP MAD requires that every IRF member have a link with an intermediate device, and all these
links form a dynamic link aggregation group, as shown in
device must be an HP device that supports extended LACP for MAD.
The IRF member devices send extended LACPDUs with TLVs that convey the domain ID and the
active ID of the IRF fabric. The intermediate device transparently forwards the extended LACPDUs
received from one member device to all the other member devices:
If the domain IDs and the active IDs in the extended LACPDUs sent by all the member devices
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are the same, the IRF fabric is integrated.
If the extended LACPDUs convey the same domain ID but different active IDs, a split has
•
occurred. To handle this situation, LACP MAD sets the IRF fabric with higher active ID in
Recovery state, and shuts down all its physical ports but the console ports, IRF ports, and any
ports you have specified with the mad exclude interface command. The IRF fabric with lower
active ID is still in Active state and forwards traffic.
Figure
9
7. In addition, the intermediate