About Ip Multicast Routing - 3Com CoreBuilder 2500 User Manual

5
About IP Multicast
Routing
R
OUTING WITH
This chapter describes the IP multicast routing implementation on the
™
CoreBuilder 2500 system. It includes these sections:

About IP Multicast Routing

IGMP
DVMRP
Multicast Routing Algorithms
Multicast Interfaces
Multicast Tunnels
IP multicast routing is an extension of the Internet Protocol. With
multicast routing, a router or switch sends packets to a specific group of
hosts without using broadcasts or multiple unicast transmissions.
Multicast destinations include:
Hosts that reside on the local LAN
Hosts that reside on different sites within a private network
Hosts that are scattered throughout the Internet
Multicast routing operates without loops or excess transmissions.
The CoreBuilder 2500 system supports two IP multicast protocols:
Internet Group Management Protocol (IGMP)
Distance Vector Multicast Routing Protocol (DVMRP)
This chapter describes these protocols and the algorithms that the
CoreBuilder 2500 system uses for multicast routing.
IP M
ULTICAST