NetAtlas EPON Manager User’s Guide
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Multicast Configuration
This chapter shows you how to configure multicast settings and MVR (Multicast
VLAN Registration) groups.
15.1 Overview
Traditionally, IP packets are transmitted in one of either two ways - Unicast (1
sender to 1 recipient) or Broadcast (1 sender to everybody on the network).
Multicast delivers IP packets to just a group of hosts on the network.
IGMP (Internet Group Multicast Protocol) is a session-layer protocol used to
establish membership in a multicast group - it is not used to carry user data. Refer
to RFC 1112 and RFC 2236 for information on IGMP versions 1 and 2 respectively.
15.1.1 IP Multicast Addresses
In IPv4, a multicast address allows a device to send packets to a specific group of
hosts (multicast group) in a different subnetwork. A multicast IP address
represents a traffic receiving group, not individual receiving devices. IP addresses
in the Class D range (224.0.0.0 to 239.255.255.255) are used for IP multicasting.
Certain IP multicast numbers are reserved by IANA for special purposes (see the
IANA web site for more information).
15.1.2 IGMP Snooping
A switch can passively snoop on IGMP Query, Report and Leave (IGMP version 2)
packets transferred between IP multicast routers/switches and IP multicast hosts
to learn the IP multicast group membership. It checks IGMP packets passing
through it, picks out the group registration information, and configures
multicasting accordingly. IGMP snooping allows the switch to learn multicast
groups without you having to manually configure them.
The switch forwards multicast traffic destined for multicast groups (that it has
learned from IGMP snooping or that you have manually configured) to ports that
are members of that group. IGMP snooping generates no additional network
Summary of Contents for NetAtlas
Page 2: ......
Page 8: ...Contents Overview NetAtlas EPON Manager User s Guide 8 ...
Page 16: ...Table of Contents NetAtlas EPON Manager User s Guide 16 ...
Page 17: ...17 PART I Introduction Introducing the EMS 19 Main Screen 23 ...
Page 18: ...18 ...
Page 42: ...Chapter 2 Main Screen NetAtlas EPON Manager User s Guide 42 ...
Page 44: ...44 ...
Page 88: ...Chapter 6 Template NetAtlas EPON Manager User s Guide 88 ...
Page 98: ...Chapter 7 Provisioning NetAtlas EPON Manager User s Guide 98 ...
Page 114: ...Chapter 8 Performance NetAtlas EPON Manager User s Guide 114 ...
Page 148: ...Chapter 11 Tools NetAtlas EPON Manager User s Guide 148 ...
Page 150: ...150 ...
Page 152: ...Chapter 12 OLT Configuration Overview NetAtlas EPON Manager User s Guide 152 ...
Page 198: ...Chapter 14 Switch Configuration NetAtlas EPON Manager User s Guide 198 ...
Page 216: ...Chapter 15 Multicast Configuration NetAtlas EPON Manager User s Guide 216 ...
Page 238: ...Chapter 17 RMON Configuration NetAtlas EPON Manager User s Guide 238 ...
Page 248: ...Chapter 18 EPON Configuration NetAtlas EPON Manager User s Guide 248 ...
Page 290: ...Chapter 19 EPON Profile Configuration NetAtlas EPON Manager User s Guide 290 ...
Page 314: ...314 ...
Page 316: ...Appendix A Alarm Types and Causes NetAtlas EPON Manager User s Guide 316 ...
Page 334: ...Appendix B SOAP Schema NetAtlas EPON Manager User s Guide 334 ...