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EN/LZT 790 0005 R7A
Redundancy Mode – The redundancy mode provides a simple mechanism to
handle loss of transport stream lock between the two IP Ethernet ports. When
lock on the Primary Port is detected, the unit can temporarily switch to the
backup Secondary Port depending on user configuration:
-
None: The redundancy mode is disabled. If the link is down or there is no
TS lock then unit will remain in this state and not switch to the redundant
port.
Fail Over: The redundancy mode is enabled. A link down or TS lock drop on
-
the primary port would cause a switch from the primary to the secondary
port. In any event, the unit will not switch back to the primary port.
Fail Over + Revert: The redundancy mode is enabled. A link down or TS
-
lock drop on the primary port would cause a switch from the primary to the
secondary port. The unit will automatically switch back to the primary port
after linkup has been detected on the primary port for the length of time
indicated by the Auto Revert Delay setting.
Failover Mode Switch – This determines how the redundancy mode switches
between Ports (Interfaces) and / or Streams.
Interfaces and Streams: The unit also allows dual multicast redundancy: if
-
the primary multicast is lost (due to IP encapsulator failure, etc.) the unit can
automatically switch to a backup multicast. This will follow the redundancy
state diagram shown below in Figure 3.54. In this diagram TS1 = multicast 1,
TS2 = multicast 2, IF 1 = Port 1, IF 2 = port 2.
Interfaces Only: The unit allows redundancy between the Ethernet Ports
-
only.
Auto Revert Delay – The delay, in seconds, before automatically reverting back
to the primary port.
Using the Equipment
3-87
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