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92
MSAP2000 AAMS User’s Guide
C HAPTER 9
IGMP Snooping
This chapter describes the IGMP Snooping screen.
9.1 IGMP Snooping
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.
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. The switch discards multicast traffic destined for
multicast groups that it does not know. IGMP snooping generates no additional
network traffic, allowing you to significantly reduce multicast traffic passing
through your switch.
9.2 IGMP Snooping Screen
Click Advanced Application and then IGMP Snooping in the navigation panel to
display the IGMP Snooping screen as shown next. Use this screen to turn IGMP
snooping off or on and view information collected by IGMP snooping.
Figure 42 IGMP Snooping
- MSAP2000 1
- Interference Statements and 3
- Warnings 3
- ZyXEL Limited Warranty 5
- Customer Support 6
- Table of Contents 7
- Preface 17
- Computer MSAP2000 Gateway 18
- C HAPTER 1 19
- 1.3 Applications 22
- 1.3.2 Curbside Application 23
- C HAPTER 2 24
- 2.1.1 Front Access Ports 25
- 2.1.2 Front Panel LEDs 26
- 2.1.5 Hardware specification 28
- C HAPTER 3 29
- 3.3 Home Screen 30
- C HAPTER 4 34
- 8 Click VC Setup 36
- 10 Click All and then Apply 37
- 4.3 Default Settings 39
- C HAPTER 5 41
- C HAPTER 6 48
- Basic Setting Screens 48
- 6.3 General Setup 50
- 6.4 IGMP Snooping 52
- 6.5 Switch Setup Screen 53
- C HAPTER 7 57
- 7.4 Interleave Delay 58
- 7.6 Default Settings 59
- 7.7 xDSL Port Setup 59
- 7.7.1 xDSL Port Setting 61
- 7.8 Virtual Channels 62
- 7.9 VC Setup Screen 64
- 7.10 Port Profile Screen 67
- 7.11 ATM QoS 70
- 7.12 Traffic Shaping 70
- 7.12.2 Traffic Parameters 71
- 7.13 VC Profile Screen 72
- 7.14 Alarm Profile Screen 74
- 7.17 Line Performance 80
- 7.17.1 Line Data 81
- C HAPTER 8 84
- 8.3.1 GARP 85
- 8.4 VLAN Status 86
- 8.5 Static VLAN Setting 88
- 8.6 VLAN Port Setting 89
- C HAPTER 9 92
- C HAPTER 10 94
- C HAPTER 11 96
- C HAPTER 12 98
- C HAPTER 13 100
- 13.2 STP Status 102
- 13.2.1 Configure STP 104
- C HAPTER 14 106
- C HAPTER 15 110
- C HAPTER 16 112
- C HAPTER 17 114
- C HAPTER 18 115
- 18.3 About SNMP 116
- 18.3.4 Configuring SNMP 119
- C HAPTER 19 123
- C HAPTER 20 125
- 20.6 Reboot System 127
- 20.7 Command Line FTP 128
- C HAPTER 21 129
- 21.2 Log Format 130
- 21.2.1 Log Messages 131
- ITU-Tís 133
- C HAPTER 22 135
- C HAPTER 23 137
- C HAPTER 24 139
- 24.2 Commands Summary 141
- C HAPTER 25 154
- 25.2 Sys Command Examples 156
- 25.2.4 SNMP Commands 158
- 25.2.15 Date Set Command 163
- 25.2.19 Log Clear Command 165
- C HAPTER 26 168
- 26.3 ADSL Command Examples 173
- 26.3.2 ADSL Enable Command 174
- 26.3.8 ADSL Name Command 178
- 26.3.9 ADSL Tel Command 178
- 3 0 0 0 183
- 26.5 PVC Channels 187
- 26.5.2 PVC Set Command 188
- 26.5.3 PVC Delete Command 189
- C HAPTER 27 190
- 27.2 IGMP Filter Commands 195
- 27.3 DHCP Relay Overview 198
- 27.4 DHCP Relay Commands 198
- 27.7 Filtering Databases 200
- Commands 201
- 27.8.6 VLAN PVID Command 204
- 27.8.7 VLAN Set Command 204
- 27.9 VLAN Enable 209
- 27.10 VLAN Disable 209
- 27.11 MAC Filter Commands 210
- 27.12 MAC Count Commands 213
- C HAPTER 28 218
- 28.3 IP Commands Summary 219
- 28.4 General IP Commands 221
- 28.4.5 Route Show Command 222
- 28.4.6 ARP Show Command 223
- 28.4.7 ARP Flush Command 223
- C HAPTER 29 224
- Syntax: 234
- An example is shown next 234
- C HAPTER 30 235
- C HAPTER 31 237
- C HAPTER 32 241
- 32.5 Local Server 243
- 32.6 Data Rate 244
- 32.7 Configured Settings 244
- 32.8 Password 244
- 32.9 SNMP 244
- 32.10 Telnet 245
- 32.11 Switch Lockout 245
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