Juniper J2300 User Manual page 492

J-series™ Services Router User Guide
Table 180: Multicast Terms
Term
administrative scoping
any-source multicast (ASM)
Auto-RP
Bootstrap Router (BSR) protocol
branch
broadcast routing protocol
dense mode
Distance Vector Multicast Routing Protocol (DVMRP)
distribution tree
downstream interface
group address
Internet Group Management Protocol (IGMP)
leaf
listener
462
Multicast Terms
Definition
Multicast routing strategy that limits the routers and
interfaces used to forward a multicast packet by reserving a
range of multicast addresses.
Cisco multicast routing protocol that allows sparse-mode
routing protocols to find rendezvous points (RPs) within a
routing domain.
Multicast routing protocol that allows sparse-mode routing
protocols to find rendezvous points (RPs) within a routing
domain.
Part of a multicast network that is formed when a leaf
subnetwork is joined to the multicast distribution tree.
Branches with no interested receivers are pruned from the
tree so that multicast packets are no longer replicated on
the branch.
Protocol that distributes traffic from a particular source to all
destinations.
Multicast routing mode appropriate for LANs with many
interested receivers.
Distributed multicast routing protocol that dynamically
generates IP multicast distribution trees using reverse-path
multicasting (RPM) to forward multicast traffic to downstream
interfaces.
Path linking multicast receivers (listeners) to sources. The
root of the tree is at the source, and the branches connect
subnetworks of interested receivers (leaves). Multicast
packets are replicated only where a distribution tree branches.
To shorten paths to a source at the edge of a network, sparse
mode multicast protocols can use a shared distribution tree
located more centrally in the network backbone.
Interface on a multicast router that is leading toward the
receivers. You can configure all the logical interfaces except
one as downstream interfaces.
Multicast destination address. A multicast network uses the
Class D IP address of a logical group of multicast receivers to
identify a destination. IP multicast packets have a multicast
group address as the destination address and a unicast
source address.
Multicast routing protocol that runs between receiver hosts
and routers to determine whether group members are
present. Services Routers support IGMPv1, IGMPv2, and
IGMPv3.
IP subnetwork that is connected to a multicast router and that
includes at least one host interested in receiving IP multicast
packets. The router must send a copy of its multicast packets
out on each interface with a leaf, and its action is unaffected
by the number of leaves on the interface.
Another name for a receiver in a multicast network.