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Chapter 20 Multicast
OLT-1308 Series User’s Guide
149
MVR allows one single multicast VLAN to be shared among different subscriber VLANs on
the network. While isolated in different subscriber VLANs, connected devices can subscribe
to and unsubscribe from the multicast stream in the multicast VLAN. This improves
bandwidth utilization with reduced multicast traffic in the subscriber VLANs and simplifies
multicast group management.
You must enable IGMP snooping to use MVR. However, MVR only responds to IGMP join
and leave control messages from multicast groups that are configured under MVR. Join and
leave reports from other multicast groups are managed by IGMP snooping.
The following figure shows a network example. The subscriber VLAN (
1
,
2
and
3
)
information is hidden from the streaming media server,
S
. In addition, the multicast VLAN
information is only visible to the switch and
S
.
Figure 57
MVR Network Example
20.5.1 Types of MVR Ports
In MVR, a source port is a port on the switch that can send and receive multicast traffic in a
multicast VLAN while a receiver port can only receive multicast traffic. Once configured, the
switch maintains a forwarding table that matches the multicast stream to the associated
multicast group.
20.5.2 MVR Modes
You can set your switch to operate in either dynamic or compatible mode.
In dynamic mode, the switch sends IGMP leave and join reports to the other multicast devices
(such as multicast routers or servers) in the multicast VLAN. This allows the multicast devices
to update the multicast forwarding table to forward or not forward multicast traffic to the
receiver ports.
In compatible mode, the switch does not send any IGMP reports. In this case, you must
manually configure the forwarding settings on the multicast devices in the multicast VLAN.
20.5.3 How MVR Works
The following figure shows a multicast television example where a subscriber device (such as
a computer) in VLAN 1 receives multicast traffic from the streaming media server,
S
, via the
switch. Multiple subscriber devices can connect through a port configured as the receiver on
the switch.
When the subscriber selects a television channel, computer
A
sends an IGMP report to the
switch to join the appropriate multicast group. If the IGMP report matches one of the
configured MVR multicast group addresses on the switch, an entry is created in the forwarding
table on the switch. This maps the subscriber VLAN to the list of forwarding destinations for
the specified multicast traffic.
Содержание OLT-1308
Страница 1: ...www zyxel com OLT 1308 Series Optical Line Terminal User s Guide Version 3 60 1 2007 Edition 1 ...
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Страница 7: ...Safety Warnings OLT 1308 Series User s Guide 7 ...
Страница 8: ...Safety Warnings OLT 1308 Series User s Guide 8 ...
Страница 28: ...List of Tables OLT 1308 Series User s Guide 28 ...
Страница 29: ...29 PART I Introduction Introducing the OLT 31 Hardware Installation and Connection 35 Hardware Overview 39 ...
Страница 30: ...30 ...
Страница 34: ...Chapter 1 Introducing the OLT OLT 1308 Series User s Guide 34 ...
Страница 38: ...Chapter 2 Hardware Installation and Connection OLT 1308 Series User s Guide 38 ...
Страница 44: ...44 ...
Страница 58: ...Chapter 5 Initial Setup Example OLT 1308 Series User s Guide 58 ...
Страница 72: ...Chapter 6 System Status and Port Statistics OLT 1308 Series User s Guide 72 ...
Страница 94: ...Chapter 7 Basic Setting OLT 1308 Series User s Guide 94 ...
Страница 96: ...96 ...
Страница 106: ...Chapter 8 VLAN OLT 1308 Series User s Guide 106 ...
Страница 116: ...Chapter 11 Spanning Tree Protocol OLT 1308 Series User s Guide 116 ...
Страница 126: ...Chapter 15 Link Aggregation OLT 1308 Series User s Guide 126 ...
Страница 132: ...Chapter 17 Queuing Method OLT 1308 Series User s Guide 132 ...
Страница 138: ...Chapter 18 Classifier OLT 1308 Series User s Guide 138 ...
Страница 143: ...Chapter 19 Policy OLT 1308 Series User s Guide 143 Figure 53 Policy Example ...
Страница 144: ...Chapter 19 Policy OLT 1308 Series User s Guide 144 ...
Страница 158: ...158 ...
Страница 162: ...Chapter 22 Classification Filter Profile OLT 1308 Series User s Guide 162 ...
Страница 172: ...Chapter 23 VLAN Profile OLT 1308 Series User s Guide 172 ...
Страница 184: ...Chapter 26 Destination Filter OLT 1308 Series User s Guide 184 ...
Страница 188: ...Chapter 27 Port Authentication OLT 1308 Series User s Guide 188 ...
Страница 190: ...190 ...
Страница 200: ...Chapter 29 Maintenance OLT 1308 Series User s Guide 200 ...
Страница 212: ...Chapter 30 Access Control OLT 1308 Series User s Guide 212 ...
Страница 218: ...Chapter 32 Syslog OLT 1308 Series User s Guide 218 ...
Страница 224: ...Chapter 33 Cluster Management OLT 1308 Series User s Guide 224 ...
Страница 228: ...Chapter 34 MAC Table OLT 1308 Series User s Guide 228 ...
Страница 232: ...Chapter 36 IGMP Table OLT 1308 Series User s Guide 232 ...
Страница 233: ...233 PART VI Commands and Troubleshooting Introducing the Commands 235 Command Examples 271 Troubleshooting 287 ...
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Страница 285: ...Chapter 38 Command Examples OLT 1308 Series User s Guide 285 ...
Страница 286: ...Chapter 38 Command Examples OLT 1308 Series User s Guide 286 ...
Страница 294: ...Chapter 39 Troubleshooting OLT 1308 Series User s Guide 294 ...
Страница 295: ...295 PART VII Appendix and Index Product Specifications 297 Legal Information 299 Customer Support 303 Index 307 ...
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Страница 302: ...Appendix B Legal Information OLT 1308 Series User s Guide 302 ...
Страница 314: ...Index OLT 1308 Series User s Guide 314 ...