IP Multicast
Table 12-4 summarizes IP multicast protocols.
Table 12-4. IP Multicast Protocols
|
Multicast Protocol |
Description |
|
IGMP |
Internet Group Management Protocol. Used by IP hosts to report their multicast group memberships to routers. |
|
CGMP |
Cisco Group Management Protocol. Used to control multicast traffic at Layer 2. |
|
IGMP snooping |
Another method used to control multicast traffic at Layer 2. |
|
PIM |
Protocol Independent Multicast. IP multicast routing protocol. |
|
DVMRP |
Distance-Vector Multicast Routing Protocol. Primary multicast routing protocol used in the MBONE. |
Table 12-5 summarizes IP multicast addresses.
Table 12-5. IP Multicast Addresses
|
Multicast Address |
Description |
|
224.0.0.0/24 |
Local network control block |
|
224.0.0.1 |
All hosts or all systems on this subnet |
|
224.0.0.2 |
All routers on this subnet |
|
224.0.0.4 |
DVMRP routers |
|
224.0.0.5 |
All OSPF routers |
|
224.0.0.6 |
All OSPF DR routers |
|
224.0.0.9 |
RIPv2 routers |
|
224.0.0.10 |
EIGRP routers |
|
224.0.0.13 |
All PIM routers |
|
224.0.1.0/24 |
Internetwork control block |
|
224.0.1.39 |
RP announce |
|
224.0.1.40 |
RP discovery |
|
224.0.2.0 to 224.0.255.0 |
Ad hoc block |
|
239.000.000.000 to 239.255.255.255 |
Administratively scoped |
|
239.192.000.000 to 239.251.255.255 |
Organization-local scope |
|
239.252.000.000 to 239.254.255.255 |
Site-local scope |
Table 12-6 shows IPv6 multicast addresses.
Table 12-6. IPv6 Multicast Addresses
|
Multicast Address |
Multicast Group |
|
FF01::1 |
All nodes (node-local) |
|
FF02::1 |
All nodes (link-local) |
|
FF01::2 |
All routers (node-local) |
|
FF02::2 |
All routers (link-local) |
|
FF02::5 |
OSPFv3 routers |
|
FF02::6 |
OSPFv3 designated routers |
|
FF02::9 |
Routing Information Protocol (RIPng) |
|
FF02::A |
EIGRP routers |
|
FF02::B |
Mobile agents |
|
FF02::C |
DHCP servers/relay agents |
|
FF02::D |
All PIM routers |
