Availability:
This feature was introduced in M2000 V200R011C01.

Summary:

Dual homing is a disaster tolerance mechanism that prevents the disconnection of UAC
services in the managed domain due to switch or system breakdown or system faults. This
mechanism is used to ensure the secure and reliable operation of core networks.  

Benefits:

Dual homing configuration management simplifies operations and facilitates the management
of NEs configured with dual homing relationships.

Description:

In dual homing networking mode, one MGW is controlled by two UACs. The two UACs are
referred to as a dual homing pair. Normally, each MGW is registered only on the active UAC.
When the active UAC is faulty, the MGW can be registered on the standby UAC to ensure the
continuous and normal network communication services. The active and standby UACs check
the status of each other through heartbeats.
The M2000 can automatically detect dual homing relationships and displays the relationships
in the topology view.

As one type of the basic data of the UAC, dual homing data is used to define virtual nodes,

working modes, heartbeat links, and backup routes of dual homing. The M2000 supports the
consistency check of dual homing data and generates comparison reports. Based on the check
result, the M2000 can modify inconsistent NE data, or users can synchronize correct data
from one switch to another switch. Users can also manually correct the inconsistent NE data,
which must be different according to requirements, in a dialog box, and send the corrected
data to the NE. This ensures data consistency between switches in a dual homing pair.
Users can send dual homing MML commands to both UACs in the dual homing pair but not
through broadcast. In addition, users can send the MML commands either to one or both
UACs in the pair .

Enhancement:

None

Dependency:

None

Good one

Dual homing configuration management simplifies operations and facilitates the management
of NEs configured with dual homing relationships.