Multicasting; Gmrp - Intel ZT 8101 10/100 User Manual

Switch Management and Operating Concepts

Multicasting

Multicasting is a group of protocols and tools that enable a single source point to send packets to
groups of multiple destination points with persistent connections that last for some amount of time.
The main advantage of multicasting, when compared to broadcasting, is a decrease in the network
load.
•
Broadcast packets are sent to all devices on a subnetwork.
•
Unicast packets are sent from a single network device to another single network device.
•
Multicast packets are sent to a group of network devices.
The following table lists some of the permanently assigned multicast addresses.
224.0.0.0
224.0.0.1
224.0.0.2
224.0.0.3
224.0.0.4
224.0.0.5
224.0.0.6
224.0.0.7
224.0.0.8
224.0.0.9
224.0.0.10
224.0.0.11
224.0.0.12
224.0.0.13
224.0.0.14
224.0.0.15
224.0.0.16
224.0.0.17
224.0.0.18
224.0.0.19 through 224.0.0.225 except
224.0.0.21
224.0.0.21

GMRP

GMRP (Group Multicast Registration Protocol) allows ports to dynamically join multicast groups.
40
Address
Base Address (reserved)
All Systems on this subnet
All Routers on this subnet
Unassigned
DVMRP Routers
OSPF IGP Routers
OSPF IGP Designated Routers
ST Routers
ST Hosts
All RIP2 Routers
All IGRP Routers
Mobile Agents
DHCP Servers and Relay Agents
All PIM Routers
RSVP Encapsulation
All CBT Routers
Designated Sbm
All Sbms
VRRP
Unassigned
DVMRP on MOSPF
Intel® NetStructure™ ZT 8101 10/100 Ethernet Switch User's Manual
Description