Distributed Storage System Project Wiki

Common Permanent Multicast Addresses

BASE-ADDRESS.MCAST.NET The reserved base address. This is never assigned to any multicast group.

ALL-SYSTEMS.MCAST.NET All systems on the local subnet.

ALL-ROUTERS.MCAST.NET All routers on the local subnet.

DVMRP.MCAST.NET All Distance Vector Multicast Routing Protocol (DVMRP) routers on this subnet. An early version of the DVMRP protocol is documented in RFC 1075; the current version has changed substantially.

MOBILE-AGENTS.MCAST.NET Mobile agents on the local subnet.

DHCP-AGENTS.MCAST.NET This multicast group allows a client to locate a Dynamic Host Configuration Protocol (DHCP) server or relay agent on the local subnet.

PIM-ROUTERS.MCAST.NET All Protocol Independent Multicasting (PIM) routers on this subnet.

RSVPENCAPSULATION.MCAST.NET RSVP encapsulation on this subnet. RSVP stands for Resource reSerVation setup Protocol, an effort to allow people to reserve a guaranteed amount of Internet bandwidth in advance for an event.

NTP.MCAST.NET The Network Time Protocol.

SGI-DOG.MCAST.NET Silicon Graphics Dogfight game.

NSS.MCAST.NET The Name Service Server.

AUDIONEWS.MCAST.NET Audio news multicast.

SUB-NIS.MCAST.NET Sun's NIS+ Information Service.

MTP.MCAST.NET The Multicast Transport Protocol.

IETF-1-LOWAUDIO.MCAST.NET Channel 1 of low-quality audio from IETF meetings.

IETF-1- AUDIO.MCAST.NET Channel 1 of high-quality audio from IETF meetings.

IETF-1-VIDEO.MCAST.NET Channel 1 of video from IETF meetings.

IETF-2-LOW-AUDIO.MCAST.NET Channel 2 of low-quality audio from IETF meetings.

IETF-2-AUDIO.MCAST.NET Channel 2 of high-quality audio from IETF meetings.

IETF-2-VIDEO.MCAST.NET Channel 2 of video from IETF meetings.


SEANETTELEMETRY.MCAST.NET Telemetry data for the U.S. Navy's SeaNet Project to extend the Internet to vessels at sea. See http://web.nps.navy.mil/.


MLOADD.MCAST.NET MLOADD measures the traffic load through one or more network interfaces over a number of seconds. Multicasting is used to communicate between the different interfaces being measured.

EXPERIMENT.MCAST.NET Experiments that do not go beyond the local subnet.

XINGTV.MCAST.NET XING Technology's Streamworks TV multicast.

MICROSOFT.MCAST.NET Used by Windows Internet Name Service (WINS) servers to locate one another.

MTRACE.MCAST.NET A multicast version of traceroute. The Multicast Backbone on the Internet (MBONE) addresses are reserved for multimedia conference calls, i.e., audio, video, whiteboard, and shared web browsing between many people. Port 9,875 on this address is used to broadcast the currently available MBONE programming. You can look at this with the X Window utility sdr or the Windows/Unix multikit program. Administrative scope, in contrast to TTL scope, uses different ranges of multicast addresses to constrain multicast traffic to a particular region or group of routers. For example, the IP addresses from 239.178.0 to 239.178.255 might be an administrative scope for the state of New York. Data addressed to one of those addresses would not be forwarded outside of New York. The idea is to allow the possible group membership to be established in advance without relying on lessthan- reliable TTL values. The exact divisions of this range into particular scopes remains to be defined.