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C
HAPTER
18
| Multicast Filtering
Layer 2 IGMP (Snooping and Query)
– 529 –
Multicast Router Termination – These messages are sent when a router
stops IP multicast routing functions on an interface. Termination
messages are sent by multicast routers when:
Multicast forwarding is disabled on an interface.
An interface is administratively disabled.
The router is gracefully shut down.
Advertisement and Termination messages are sent to the All-Snoopers
multicast address. Solicitation messages are sent to the All-Routers
multicast address.
N
OTE
:
MRD messages are flooded to all ports in a VLAN where IGMP
snooping or routing has been enabled. To ensure that older switches which
do not support MRD can also learn the multicast router port, the switch
floods IGMP general query packets, which do not have a null source
address (0.0.0.0), to all ports in the attached VLAN. IGMP packets with a
null source address are only flooded to all ports in the VLAN if the system is
operating in multicast flooding mode, such as when a new VLAN or new
router port is being established, or an spanning tree topology change has
occurred. Otherwise, this kind of packet is only forwarded to known
multicast routing ports.
P
ARAMETERS
These parameters are displayed:
VLAN
– ID of configured VLANs. (Range: 1-4093)
IGMP Snooping Status
– When enabled, the switch will monitor
network traffic on the indicated VLAN interface to determine which
hosts want to receive multicast traffic. This is referred to as IGMP
Snooping. (Default: Disabled)
When IGMP snooping is enabled globally (see
), the per VLAN
interface settings for IGMP snooping take precedence.
When IGMP snooping is disabled globally, snooping can still be
configured per VLAN interface, but the interface settings will not take
effect until snooping is re-enabled globally.
Version Exclusive
– Discards any received IGMP messages (except for
multicast protocol packets) which use a version different to that
currently configured by the IGMP Version attribute. (Default: Disabled)
If version exclusive is disabled on a VLAN, then this setting is based on
the global setting configured on the Multicast > IGMP Snooping >
General page. If it is enabled on a VLAN, then this setting takes
precedence over the global setting.
Immediate Leave Status
– Immediately deletes a member port of a
multicast service if a leave packet is received at that port and
immediate leave is enabled for the parent VLAN. (Default: Disabled)
Summary of Contents for DG-FS4526E
Page 4: ...ABOUT THIS GUIDE 4...
Page 34: ...CONTENTS 34...
Page 50: ...TABLES 50...
Page 52: ...SECTION I Getting Started 52...
Page 62: ...CHAPTER 1 Introduction System Defaults 62...
Page 80: ...CHAPTER 2 Initial Switch Configuration Managing System Files 80...
Page 82: ...SECTION II Web Configuration 82...
Page 100: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 100...
Page 128: ...CHAPTER 4 Basic Management Tasks Resetting the System 128...
Page 166: ...CHAPTER 5 Interface Configuration VLAN Trunking 166...
Page 198: ...CHAPTER 6 VLAN Configuration Configuring VLAN Mirroring 198...
Page 516: ...CHAPTER 17 IP Services Displaying the DNS Cache 516...
Page 562: ...CHAPTER 19 Using the Command Line Interface CLI Command Groups 562...
Page 652: ...CHAPTER 22 SNMP Commands 652...
Page 660: ...CHAPTER 23 Remote Monitoring Commands 660...
Page 714: ...CHAPTER 24 Authentication Commands Management IP Filter 714...
Page 802: ...CHAPTER 27 Interface Commands 802...
Page 824: ...CHAPTER 29 Port Mirroring Commands RSPAN Mirroring Commands 824...
Page 846: ...CHAPTER 32 Address Table Commands 846...
Page 874: ...CHAPTER 33 Spanning Tree Commands 874...
Page 886: ...CHAPTER 34 ERPS Commands 886...
Page 928: ...CHAPTER 35 VLAN Commands Configuring Voice VLANs 928...
Page 942: ...CHAPTER 36 Class of Service Commands Priority Commands Layer 3 and 4 942...
Page 998: ...CHAPTER 38 Multicast Filtering Commands Multicast VLAN Registration 998...
Page 1022: ...CHAPTER 39 LLDP Commands 1022...
Page 1064: ...CHAPTER 40 CFM Commands 1064...
Page 1084: ...CHAPTER 42 Domain Name Service Commands 1084...
Page 1090: ...CHAPTER 43 DHCP Commands DHCP Client 1090...
Page 1122: ...CHAPTER 44 IP Interface Commands IPv6 Interface 1122...
Page 1124: ...SECTION IV Appendices 1124...
Page 1130: ...APPENDIX A Software Specifications Management Information Bases 1130...
Page 1152: ...COMMAND LIST 1152...
Page 1161: ......
Page 1162: ...DG FS4526E 042012 HW R01...