
C
HAPTER
40
| Multicast Filtering Commands
IGMP Snooping
– 1238 –
C
OMMAND
U
SAGE
◆
When a multicast host leaves a group, it sends an IGMP leave message.
When the leave message is received by the switch, it checks to see if
this host is the last to leave the group by sending out an IGMP group-
specific or group-and-source-specific query message, and starts a
timer. If no reports are received before the timer expires, the group
record is deleted, and a report is sent to the upstream multicast router.
◆
A reduced value will result in reduced time to detect the loss of the last
member of a group or source, but may generate more bursty traffic.
◆
This command will take effect only if IGMP snooping proxy reporting is
enabled (
).
E
XAMPLE
Console(config)#ip igmp snooping vlan 1 last-memb-query-intvl 700
Console(config)#
ip igmp snooping
vlan mrd
This command enables sending of multicast router solicitation messages.
Use the
no
form to disable these messages.
S
YNTAX
[
no
]
ip igmp snooping vlan
vlan-id
mrd
vlan-id
- VLAN ID (Range: 1-4094)
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Global Configuration
C
OMMAND
U
SAGE
◆
Multicast Router Discovery (MRD) uses multicast router advertisement,
multicast router solicitation, and multicast router termination messages
to discover multicast routers. 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.
◆
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 expiration of a periodic timer, as a part of a router's
start up procedure, during the restart of a multicast forwarding
interface, and on receipt of a solicitation message. When the multicast
services provided to a VLAN is relatively stable, the use of solicitation
Summary of Contents for ECS4110-28T
Page 2: ......
Page 4: ......
Page 63: ...FIGURES 63 Figure 428 Configuring VLAN Translation 1177...
Page 64: ...FIGURES 64...
Page 72: ...TABLES 72...
Page 74: ...SECTION I Getting Started 74...
Page 102: ...SECTION II Web Configuration 102 General IP Routing on page 679...
Page 154: ...CHAPTER 4 Basic Management Tasks Resetting the System 154...
Page 198: ...CHAPTER 5 Interface Configuration VLAN Trunking 198 Figure 65 Configuring VLAN Trunking...
Page 272: ...CHAPTER 9 Congestion Control Automatic Traffic Control 272...
Page 286: ...CHAPTER 10 Class of Service Layer 3 4 Priority Settings 286...
Page 420: ...CHAPTER 13 Security Measures DHCP Snooping 420...
Page 566: ...CHAPTER 14 Basic Administration Protocols OAM Configuration 566...
Page 638: ...CHAPTER 15 Multicast Filtering Multicast VLAN Registration for IPv6 638...
Page 662: ...CHAPTER 16 IP Configuration Setting the Switch s IP Address IP Version 6 662...
Page 678: ...CHAPTER 17 IP Services Configuring the PPPoE Intermediate Agent 678...
Page 792: ...CHAPTER 21 System Management Commands Switch Clustering 792...
Page 822: ...CHAPTER 23 Remote Monitoring Commands 822...
Page 888: ...CHAPTER 24 Authentication Commands PPPoE Intermediate Agent 888...
Page 968: ...CHAPTER 25 General Security Measures Port based Traffic Segmentation 968...
Page 994: ...CHAPTER 26 Access Control Lists ACL Information 994...
Page 1034: ...CHAPTER 28 Link Aggregation Commands Trunk Status Display Commands 1034...
Page 1044: ...CHAPTER 29 Power over Ethernet Commands 1044...
Page 1084: ...CHAPTER 33 UniDirectional Link Detection Commands 1084...
Page 1090: ...CHAPTER 34 Address Table Commands 1090...
Page 1194: ...CHAPTER 37 VLAN Commands Configuring Voice VLANs 1194...
Page 1388: ...CHAPTER 42 CFM Commands Delay Measure Operations 1388...
Page 1410: ...CHAPTER 44 Domain Name Service Commands 1410...
Page 1420: ...CHAPTER 45 DHCP Commands DHCP Relay 1420...
Page 1472: ...CHAPTER 46 IP Routing Commands IPv4 Commands 1472...
Page 1474: ...SECTION IV Appendices 1474...
Page 1502: ...COMMAND LIST 1502...
Page 1513: ......
Page 1514: ...ECS4110 28T ECS4110 28P ECS4110 52T ECS4110 52P E072014 ST R02 150200000929A...