Video on Demand
(VoD) or unicast services cannot be replicated across line cards. You can
accomplish replication by adding more than one RF port to an SDG. This feature
works for the SDG regardless of whether the video sessions are table-based or
applies to the QAM PHY parameters. Hence, the QAM PHY parameters like
frequency, annex, and symbol rate of the replicated QAM carrier are the same as
the QAM PHY parameters on the pilot QAM carrier.
QAM replication is
achieved in two ways: software and hardware. The line card performs the
hardware QAM replication. Each line card has the capability to replicate an
output QAM (Pilot QAM) from one port to another output QAM (Replicate QAM) on
in the same port is not supported.
service-distribution-group construct is used to perform replication.
Hardware replication is supported when the replication of individual QAM
Carriers is limited to the same line card.
bind-vcg construct, which is used to determine the physical QAMs
to be replicated, is analogous to combiner and splitter combination. The RF
ports combine all the QAMs routed to them. Then, one or more inputs are split
to one or more RF output ports.