Ericsson SPR1100 Operations Instructions Page 188

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Stream Processing and Networking
6.4.6.1 Automatic Failover
Automatic failover is available in Active/Standby Port Mode. If the active interface
suffers a link down failure, the standby interface takes over automatically. The
standby interface remains active until either the standby interface fails or a manual
switch is performed by the user.
6.4.6.2 Automatic Revert
Automatic revert is an option on most devices in
Active/Standby Port Mode. If the
active interface suffers a link down failure, the standby interface takes over
automatically if Auto failover is selected. If the formally active interface recovers,
the device will wait for the configured Auto revert delay period and then revert back
to the original active interface. Auto revert can be disabled.
6.5 Device Redundancy
6.5.1 Standalone (No Redundancy)
In a Standalone system there is no protection against failure of the device. In the
event of a device failure the output profiles will be lost and streaming will be
interrupted.
This configuration can only use IP Interface Redundancy, described previously, to
provide protection against a network delivery failure.
6.5.2 Dual Active
Dual active means two units running identical configuration and both units are active
at the same time. SPR1100 does not currently support automatic mirroring of
configuration hence, for dual active operation, both units must be individually
configured.
6.5.3 1 + 1 Redundancy
In a 1 + 1 Redundant system, an active Primary device is used to deliver the
Transport Stream and Secondary device is configured as a Redundant spare or
Hot standby.
The configuration settings of each unit are automatically replicated to its peer. Each
unit is expected to be connected to the same input and output networks. Each unit
will be performing the same transcodes, however only one unit will be Active,
meaning only one unit will be outputting multicast packets.
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