Chapter 8 Multicast Screens
Management Switch Card User’s Guide
186
In IGMP proxy, an upstream interface is the port that is closer to the source (or the root of the
multicast tree) and is able to receive multicast traffic. There should only be one upstream interface
(also known as the query port) on the system to limit bandwidth use. A downstream interface is a
port that connects to a host (such as a computer). A query VLAN determines which ports are
downstream interfaces.
The following figure shows a network example where A is the multicast source while computers 1, 2
and 3 are the receivers. In the figure A is connected to the upstream interface and 1, 2 and 3 are
connected to the downstream interface.
Figure 111
IGMP Proxy Network Example
The system will not respond to IGMP join and leave messages on the upstream interface. The
system only responds to IGMP query messages on the upstream interface. The system sends IGMP
query messages to the hosts that are members of the query VLAN.
The system only sends an IGMP leave messages via the upstream interface when the last host
leaves a multicast group.
One of the Ethernet ports acts as the upstream interface. By default, the DSL ports are set as the
downstream interfaces.
Note: The switch does not allow a subscriber port to send multicast traffic (except static
multicast traffic) to an uplink port. Only the uplink port can forward multicast traffic
to the subscriber port(s).
8.1.4 IGMP Snooping and Proxy Note
The IES acts as an IGMPv3 client host for an edge IGMPv3 multicast router and as a IGMPv2/v3
router for IGMPv2/v3 client hosts (subscribers). The IES can recognize IGMPv3 protocol messages
and forward them towards the IGMP multicast router. It does not support full-featured IGMPv3
functions like source IP address control specified in RFC 3376.
A
1
2
3
Содержание MSC1000G Series
Страница 38: ...Table of Contents Management Switch Card User s Guide 38...
Страница 39: ...39 PART I Introduction...
Страница 40: ...40...
Страница 54: ...Chapter 1 Getting to Know Your MSC Management Switch Card User s Guide 54...
Страница 61: ...61 PART II Web Configurator...
Страница 62: ...62...
Страница 80: ...Chapter 3 The Web Configurator Management Switch Card User s Guide 80...
Страница 162: ...Chapter 5 Alarm Screens Management Switch Card User s Guide 162...
Страница 178: ...Chapter 6 Diagnostic Screens Management Switch Card User s Guide 178...
Страница 184: ...Chapter 7 Maintenance Screens Management Switch Card User s Guide 184...
Страница 204: ...Chapter 8 Multicast Screens Management Switch Card User s Guide 204...
Страница 226: ...Chapter 9 Subscriber Port Setup Screens Management Switch Card User s Guide 226...
Страница 227: ...Chapter 9 Subscriber Port Setup Screens Management Switch Card User s Guide 227...
Страница 330: ...Chapter 10 IMA Screens Management Switch Card User s Guide 330...
Страница 346: ...Chapter 11 Profile Screens Management Switch Card User s Guide 346 Figure 222 Profile VDSL2 LineProfile MIB PSD Mask...
Страница 351: ...Chapter 11 Profile Screens Management Switch Card User s Guide 351 Figure 225 Profile VDSL2 LineProfile Virtual Noise...
Страница 404: ...Chapter 11 Profile Screens Management Switch Card User s Guide 404 Figure 267 ACL Profile Setup...
Страница 412: ...Chapter 11 Profile Screens Management Switch Card User s Guide 412...
Страница 451: ...Chapter 12 Statistics Screens Management Switch Card User s Guide 451 Figure 297 Port Statistics DSL Line Card Status...
Страница 512: ...Chapter 12 Statistics Screens Management Switch Card User s Guide 512...
Страница 560: ...Chapter 13 Switch Screens Management Switch Card User s Guide 560...
Страница 598: ...Chapter 15 VLAN Screens Management Switch Card User s Guide 598...
Страница 636: ...Chapter 16 VoIP Management Switch Card User s Guide 636...
Страница 638: ...Chapter 17 Config Save Management Switch Card User s Guide 638...
Страница 639: ...639 PART III Commands...
Страница 640: ...640...
Страница 646: ...Chapter 18 Commands Management Switch Card User s Guide 646...
Страница 682: ...Chapter 19 acl Commands Management Switch Card User s Guide 682...
Страница 690: ...Chapter 20 alarm Commands Management Switch Card User s Guide 690...
Страница 696: ...Chapter 22 config Commands Management Switch Card User s Guide 696...
Страница 754: ...Chapter 28 multicast Commands Management Switch Card User s Guide 754...
Страница 840: ...Chapter 29 port Commands Management Switch Card User s Guide 840...
Страница 924: ...Chapter 30 profile Commands Management Switch Card User s Guide 924...
Страница 926: ...Chapter 31 redundant Commands Management Switch Card User s Guide 926...
Страница 1062: ...Chapter 35 vlan Commands Management Switch Card User s Guide 1062...
Страница 1103: ...1103 PART IV Troubleshooting Specifications Appendices and Index...
Страница 1104: ...1104...
Страница 1134: ...Chapter 39 Product Specifications Management Switch Card User s Guide 1134...
Страница 1146: ...Appendix B Legal Information Management Switch Card User s Guide 1146...