ASM (Any Source Multicast)—A method of allowing a multicast receiver to listen to all
traffic sent to a multicast group, regardless of its source.
BSR (broadband services router)—A router used for subscriber management and edge routing.
IGMP (Internet Group Membership
Protocol)—A host to router signaling protocol
for IPv4 used to support IP multicasting.
IS-IS (Intermediate System-to-Intermediate
System)—A link-state, interior gateway routing
protocol (IGRP) for IP networks that uses the shortest-path-first
(SPF) algorithm to determine routes.
LSP (label-switched path)—The path traversed by a packet that is routed by MPLS. Some
LSPs act as tunnels. LSPs are unidirectional, carrying traffic only
in the downstream direction from an ingress node to an egress node.
MPLS (Multiprotocol Label Switching)—A mechanism for engineering network traffic patterns that
functions by assigning to network packets short labels that describe
how to forward the packets through the network.
OIF (outgoing interface)—An interface used by multicast functions within a router to
determine which egress ports to use for fowarding multicast groups.
OSPF (Open Shortest Path First)—A link-state interior gateway protocol (IGP) that makes routing
decisions based on the shortest-path-first (SPF) algorithm (also referred
to as the Dijkstra algorithm).
PIM (Protocol Independent Multicast)—A multicast routing protocol used for delivering multicast
messages in a routed environment.
routing gateway—A
firewall, Network Address Translation (NAT) router, or other routing
device used as a customer premises equipment (CPE) terminator in the
home, office, or local point of presence (POP).
SSM (single-source multicast)—A routing method that allows a multicast receiver to detect
only a specifically identified sender within a multicast group.
set-top box—The
end host or device used to receive IPTV video streams.
VOD (video on demand)—A unicast streaming video offering by service providers that
enables the reception of an isolated video session per user with rewind,
pause, and similar VCR-like capabilities.
VSR (video services router)—A router used in a video services network to route video streams
between an access network and a metro or core network. The VSR is
any M-series or MX-series router that supports the video routing package
provided with JUNOS software Release 8.3 or later.
