Chapter 20
| Multicast Filtering Commands
IGMP Snooping
– 465 –
Example
The following example enables TCN flooding.
Console(config)#ip igmp snooping tcn-flood
Console(config)#
ip igmp snooping
tcn-query-solicit
This command instructs the switch to send out an IGMP general query solicitation
when a spanning tree topology change notification (TCN) occurs. Use the
no
form
to disable this feature.
Syntax
[
no
]
ip igmp snooping tcn-query-solicit
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
◆
When the root bridge in a spanning tree receives a topology change
notification for a VLAN where IGMP snooping is enabled, it issues a global IGMP
leave message (query solicitation). When a switch receives this solicitation, it
floods it to all ports in the VLAN where the spanning tree change occurred.
When an upstream multicast router receives this solicitation, it will also
immediately issues an IGMP general query.
◆
The
ip igmp snooping tcn query-solicit
command can be used to send a
query solicitation whenever it notices a topology change, even if the switch is
not the root bridge in the spanning tree.
Example
The following example instructs the switch to issue an IGMP general query
whenever it receives a spanning tree topology change notification.
Console(config)#ip igmp snooping tcn query-solicit
Console(config)#
Содержание EX-3524
Страница 2: ......
Страница 28: ...Figures 28 ...
Страница 34: ...Section I Getting Started 34 ...
Страница 58: ...Chapter 1 Initial Switch Configuration Setting the System Clock 58 ...
Страница 72: ...Chapter 2 Using the Command Line Interface CLI Command Groups 72 ...
Страница 156: ...Chapter 5 SNMP Commands Notification Log Commands 156 ...
Страница 164: ...Chapter 6 Remote Monitoring Commands 164 ...
Страница 218: ...Chapter 7 Authentication Commands Management IP Filter 218 ...
Страница 268: ...Chapter 8 General Security Measures Port based Traffic Segmentation 268 ...
Страница 292: ...Chapter 9 Access Control Lists ACL Information 292 ...
Страница 312: ...Chapter 10 Interface Commands Power Savings 312 ...
Страница 324: ...Chapter 11 Link Aggregation Commands Trunk Status Display Commands 324 ...
Страница 366: ...Chapter 15 Address Table Commands 366 ...
Страница 428: ...Chapter 17 VLAN Commands Configuring Voice VLANs 428 ...
Страница 572: ...Chapter 25 IP Interface Commands IPv6 Interface 572 ...
Страница 578: ...Section I Appendices 578 ...
Страница 594: ...Appendix C Customer Support Manuals 594 ...