ES-315/ES-315-F User’s Guide
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H A P T E R
13
Multicast
This chapter shows you how to configure various multicast features.
13.1 Multicast 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 Management Protocol) is a network-layer protocol used to establish
membership in a multicast group - it is not used to carry user data. Refer to RFC 1112, RFC
2236 and RFC 3376 for information on IGMP versions 1, 2 and 3 respectively.
13.1.1 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).
13.1.2 IGMP Filtering
With the IGMP filtering feature, you can control which IGMP groups a subscriber on a port
can join. This allows you to control the distribution of multicast services (such as content
information distribution) based on service plans and types of subscription.
You can set the Switch to filter the multicast group join reports on a per-port basis by
configuring an IGMP filtering profile and associating the profile to a port.
13.1.3 IGMP Snooping
A Switch can passively snoop on IGMP 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.
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Страница 7: ...Safety Warnings ES 315 ES 315 F User s Guide 7 ...
Страница 8: ...Safety Warnings ES 315 ES 315 F User s Guide 8 ...
Страница 10: ...Contents Overview ES 315 ES 315 F User s Guide 10 ...
Страница 21: ...21 PART I Introduction and Hardware Getting to Know Your Switch 23 Hardware Overview 27 ...
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Страница 26: ...Chapter 1 Getting to Know Your Switch ES 315 ES 315 F User s Guide 26 ...
Страница 29: ...Chapter 2 Hardware Overview ES 315 ES 315 F User s Guide 29 Figure 7 Base Panel ES 315 F POWER ...
Страница 30: ...Chapter 2 Hardware Overview ES 315 ES 315 F User s Guide 30 ...
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Страница 84: ...Chapter 13 Multicast ES 315 ES 315 F User s Guide 84 Figure 41 MVR Group Configuration Example ...
Страница 85: ...85 PART IV IP Application Static Route 87 ...
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Страница 90: ...Chapter 14 Static Route ES 315 ES 315 F User s Guide 90 ...
Страница 91: ...91 PART V Management Maintenance 93 Access Control 99 Diagnostic 113 Syslog 115 MAC Table 119 ARP Table 121 ...
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Страница 112: ...Chapter 16 Access Control ES 315 ES 315 F User s Guide 112 ...
Страница 114: ...Chapter 17 Diagnostic ES 315 ES 315 F User s Guide 114 ...
Страница 118: ...Chapter 18 Syslog ES 315 ES 315 F User s Guide 118 ...
Страница 123: ...Chapter 20 ARP Table ES 315 ES 315 F User s Guide 123 ...
Страница 124: ...Chapter 20 ARP Table ES 315 ES 315 F User s Guide 124 ...
Страница 125: ...125 PART VI Troubleshooting and Product Specifications Troubleshooting 127 Product Specifications 131 ...
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Страница 130: ...Chapter 21 Troubleshooting ES 315 ES 315 F User s Guide 130 ...
Страница 136: ...Chapter 22 Product Specifications ES 315 ES 315 F User s Guide 136 ...
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Страница 152: ...Appendix B Common Services ES 315 ES 315 F User s Guide 152 ...
Страница 156: ...Appendix C Legal Information ES 315 ES 315 F User s Guide 156 ...
Страница 162: ...Appendix D Customer Support ES 315 ES 315 F User s Guide 162 ...