Juniper Internet Router M160 Hardware Manual page 69

with JUNOS routing policy, provides a system of administrative checks and
balances that can be used to implement peering and transit agreements.
ICMP—Internet Control Message Protocol router discovery is a method
that hosts can use to discover the addresses of operational routers on a
subnet.
IS-IS—Intermediate System-to-Intermediate System is a link-state interior
gateway protocol (IGP) for IP networks that uses the shortest-path-first
algorithm (SPF algorithm, also called the Dijkstra algorithm) to determine
routes.
OSPF—Open Shortest Path First, version 2, is an IGP developed for
IP networks by the Internet Engineering Task Force (IETF). OSPF is
a link-state protocol that makes routing decisions based on the SPF
algorithm.
RIP—Routing Information Protocol, version 2, is an IGP for IP networks
based on the Bellman-Ford algorithm. RIP is a distance-vector protocol.
RIP dynamically routes packets between a subscriber and a service
provider without the subscriber having to configure BGP or to participate
in the service provider's IGP discovery process.
Multicast routing protocols
DVMRP—Distance Vector Multicast Routing Protocol is a dense-mode
(flood-and-prune) multicast routing protocol.
IGMP—Internet Group Management Protocol, versions 1 and 2, is used
to manage membership in multicast groups.
MSDP—Multicast Source Discovery Protocol enables multiple PIM sparse
mode domains to be joined. A rendezvous point (RP) in a PIM sparse
mode domain has a peering relationship with an RP in another domain,
thereby discovering multicast sources from other domains.
PIM sparse mode and dense mode—Protocol-Independent Multicast is a
multicast routing protocol used to route traffic to multicast groups that
might span wide-area and interdomain internetworks. In PIM sparse
mode, routers explicitly join and leave multicast groups. PIM dense
mode is a flood-and-prune protocol.
SAP/SDP—Session Announcement Protocol and Session Description
Protocol handle conference session announcements.
MPLS application protocols
LDP—Label Distribution Protocol provides a mechanism for distributing
labels in nontraffic-engineered applications. LDP allows routers to
establish label-switched paths (LSPs) through a network by mapping
network-layer routing information directly to data-link layer switched
JUNOS Internet Software Overview
Routing Engine Software Components
45