NSG 9000-6G - Harmonic Inc

Chapter 3 Configuring Platform Parameters
EdgeCluster
Table 3-14: EdgeCluster M-CMTS Versus Broadcast
Item Deployment Difference
GbE Input
Ports
Broadcast The GbE input ports of both NSG devices must be
configured the same. However, each device should have a
unique IP address of the input port.
Redundancy
Switch
M-CMTS
M-CMTS
The GbE input ports of both NSG devices must be
configured the same including the IP addresses of the GbE
input ports.
Note: For proper edgeCluster operation, GbE ports of the primary
and backup devices should have fiber SFPs.
Upon redundancy switch, the active device momentarily
shuts up its GbE ports to signal the source device that the
device is faulty.
3.17.1.1 Triggering Event for Redundancy Switch
The trigger for a redundancy switch can be one of the following:
• A triggering alarm is raised on the active device. To view the list of the default triggering
alarms and to define triggering alarms, see 6.3.5 Setting Alarm Parameters on page 123.
NOTE: Only Advanced users may re-define the triggering alarms.
• A manual redundancy switch, when Redundancy mode is Manual. See 3.17.2 Configuring
EdgeCluster on page 69.
• The standby device does not receive heartbeat messages for a pre-defined period of
time due to a re-boot failure of the active device.
3.17.1.2 Redundancy Switch Scenario
Both devices constantly send and listen for heartbeat messages. Once a triggering event
takes place on the primary/active device, the following takes place:
• The primary/active device closes its QAM-RF ports and reflects its new status to its peer
device via a heartbeat message.
• The standby/ backup device becomes active, opens its QAM-RF ports and starts
transmitting the content.
NOTE: In case of a reboot failure of the active device, once it is back and running, it runs in Standalone
mode.
3.17.2 Configuring EdgeCluster
NOTE: MCT is the main tool for configuring and controlling devices working in edgeCluster mode. The
following descriptions and instructions refer to the web client of the device. To work with MCT, see MCT
11.1 Software Guide.
© 2012 Harmonic Inc. 69 NSG 9000-6G, Version 2.7, Rev B