C
HAPTER
17
| Multicast Filtering
Layer 2 IGMP (Snooping and Query for IPv4)
– 627 –
N
OTE
:
The default values recommended in the MRD draft are implemented
in the switch.
Multicast Router Discovery uses the following three message types to
discover multicast routers:
◆
Multicast Router Advertisement – Advertisements are sent by routers to
advertise that IP multicast forwarding is enabled. These messages are
sent unsolicited periodically on all router interfaces on which multicast
forwarding is enabled. They are sent upon the occurrence of these
events:
■
Upon the expiration of a periodic (randomized) timer.
■
As a part of a router's start up procedure.
■
During the restart of a multicast forwarding interface.
■
On receipt of a Solicitation message.
◆
Multicast Router Solicitation – Devices send Solicitation messages in
order to solicit Advertisement messages from multicast routers. These
messages are used to discover multicast routers on a directly attached
link. Solicitation messages are also sent whenever a multicast
forwarding interface is initialized or re-initialized. Upon receiving a
solicitation on an interface with IP multicast forwarding and MRD
enabled, a router will respond with an Advertisement.
◆
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.
Summary of Contents for ECS3510-10PD
Page 1: ...Management Guide www edge core com 10 Port Layer 2 Fast Ethernet Switch...
Page 2: ......
Page 4: ......
Page 48: ...CONTENTS 48...
Page 68: ...SECTION I Getting Started 68...
Page 78: ...CHAPTER 1 Introduction System Defaults 78...
Page 96: ...CHAPTER 2 Initial Switch Configuration Managing System Files 96...
Page 98: ...SECTION II Web Configuration 98...
Page 118: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 118...
Page 150: ...CHAPTER 4 Basic Management Tasks Resetting the System 150...
Page 196: ...CHAPTER 5 Interface Configuration VLAN Trunking 196 Figure 66 Configuring VLAN Trunking...
Page 238: ...CHAPTER 7 Address Table Settings Configuring MAC Address Mirroring 238...
Page 264: ...CHAPTER 8 Spanning Tree Algorithm Configuring Interface Settings for MSTP 264...
Page 274: ...CHAPTER 9 Congestion Control Automatic Traffic Control 274...
Page 288: ...CHAPTER 10 Class of Service Layer 3 4 Priority Settings 288...
Page 304: ...CHAPTER 11 Quality of Service Attaching a Policy Map to a Port 304...
Page 424: ...CHAPTER 13 Security Measures DHCP Snooping 424...
Page 568: ...CHAPTER 14 Basic Administration Protocols OAM Configuration 568...
Page 596: ...CHAPTER 15 IP Configuration Setting the Switch s IP Address IP Version 6 596...
Page 614: ...CHAPTER 1 IP Services Configuring the PPPoE Intermediate Agent 614...
Page 784: ...CHAPTER 20 System Management Commands Powered Device 784...
Page 814: ...CHAPTER 22 Remote Monitoring Commands 814...
Page 1008: ...CHAPTER 26 Interface Commands Power Savings 1008...
Page 1022: ...CHAPTER 27 Link Aggregation Commands Trunk Status Display Commands 1022...
Page 1052: ...CHAPTER 29 Congestion Control Commands Automatic Traffic Control Commands 1052...
Page 1064: ...CHAPTER 31 UniDirectional Link Detection Commands 1064...
Page 1070: ...CHAPTER 32 Address Table Commands 1070...
Page 1130: ...CHAPTER 34 ERPS Commands 1130...
Page 1172: ...CHAPTER 35 VLAN Commands Configuring Voice VLANs 1172...
Page 1186: ...CHAPTER 36 Class of Service Commands Priority Commands Layer 3 and 4 1186...
Page 1302: ...CHAPTER 38 Multicast Filtering Commands MVR for IPv6 1302...
Page 1368: ...CHAPTER 40 CFM Commands Delay Measure Operations 1368...
Page 1390: ...CHAPTER 42 Domain Name Service Commands 1390...
Page 1448: ...CHAPTER 44 IP Interface Commands ND Snooping 1448...
Page 1450: ...SECTION IV Appendices 1450...
Page 1455: ...APPENDIX A Software Specifications Management Information Bases 1455 UDP MIB RFC 2013...
Page 1456: ...APPENDIX A Software Specifications Management Information Bases 1456...
Page 1482: ...COMMAND LIST 1482...
Page 1493: ......