Chapter 20
| Multicast Filtering Commands
IGMP Snooping
– 469 –
Command Usage
◆
By default, general query messages are flooded to all ports, except for the
multicast router through which they are received.
◆
If general query suppression is enabled, then these messages are forwarded
only to downstream ports which have joined a multicast service.
Example
Console(config)#ip igmp snooping vlan 1 general-query-suppression
Console(config)#
ip igmp snooping vlan
immediate-leave
This command 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.
Use the
no
form to restore the default.
Syntax
[
no
]
ip igmp snooping vlan
vlan-id
immediate-leave
vlan-id
- VLAN ID (Range: 1-4093)
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
◆
If immediate-leave is
not
used, a multicast router (or querier) will send a group-
specific query message when an IGMPv2/v3 group leave message is received.
The router/querier stops forwarding traffic for that group only if no host replies
to the query within the time out period. (The time out for this release is
currently defined by Last Member Query Interval (fixed at one second) *
Robustness Variable (fixed at 2) as defined in RFC 2236.
◆
If immediate-leave is enabled, the switch assumes that only one host is
connected to the interface. Therefore, immediate leave should only be enabled
on an interface if it is connected to only one IGMP-enabled device, either a
service host or a neighbor running IGMP snooping.
◆
This command is only effective if IGMP snooping is enabled, and IGMPv2 or
IGMPv3 snooping is used.
Summary of Contents for EX-3524
Page 2: ......
Page 28: ...Figures 28 ...
Page 34: ...Section I Getting Started 34 ...
Page 58: ...Chapter 1 Initial Switch Configuration Setting the System Clock 58 ...
Page 72: ...Chapter 2 Using the Command Line Interface CLI Command Groups 72 ...
Page 156: ...Chapter 5 SNMP Commands Notification Log Commands 156 ...
Page 164: ...Chapter 6 Remote Monitoring Commands 164 ...
Page 218: ...Chapter 7 Authentication Commands Management IP Filter 218 ...
Page 268: ...Chapter 8 General Security Measures Port based Traffic Segmentation 268 ...
Page 292: ...Chapter 9 Access Control Lists ACL Information 292 ...
Page 312: ...Chapter 10 Interface Commands Power Savings 312 ...
Page 324: ...Chapter 11 Link Aggregation Commands Trunk Status Display Commands 324 ...
Page 366: ...Chapter 15 Address Table Commands 366 ...
Page 428: ...Chapter 17 VLAN Commands Configuring Voice VLANs 428 ...
Page 572: ...Chapter 25 IP Interface Commands IPv6 Interface 572 ...
Page 578: ...Section I Appendices 578 ...