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Internet Group Management Protocol (IGMP)
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•
IGMP snooping reacts to Layer 2 topology changes triggered by MSTP by sending a general query
on the interface that comes in FWD state.
Important Points to Remember for IGMP Querier
•
The IGMP snooping Querier supports version 2.
•
You must configure an IP address to the VLAN interface for IGMP snooping Querier to begin.
The IGMP snooping Querier disables itself when a VLAN IP address is cleared, and then it
restarts itself when an IP address is re-assigned to the VLAN interface.
•
When enabled, IGMP snooping Querier will not start if there is a statically configured multicast
router interface in the VLAN.
•
When enabled, IGMP snooping Querier starts after one query interval in case no IGMP general
query (with IP SA lower than its VLAN IP address) is received on any of its VLAN members.
•
When enabled, IGMP snooping Querier periodically sends general queries with an IP source
address of the VLAN interface. If it receives a general query on any of its VLAN member, it will
check the IP source address of the incoming frame.
If the IP SA in the incoming IGMP general query frame is lower than the IP address of
the VLAN interface, then the switch disables its IGMP snooping Querier functionality.
If the IP SA of the incoming IGMP general query is higher than the VLAN IP address,
the switch will continue to work as an IGMP snooping Querier.
ip igmp snooping enable
c e s
Enable IGMP snooping on all or a single VLAN. This is the master on/off switch to enable IGMP
snooping.
Syntax
ip igmp snooping enable
To disable IGMP snooping, enter
no ip igmp snooping enable
command.
Defaults
Disabled
Command Modes
CONFIGURATION
INTERFACE VLAN
Command
History
Usage
Information
You must enter this command to enable IGMP snooping. When enabled from CONFIGURATION
mode, IGMP snooping is enabled on all VLAN interfaces (except default VLAN).
Related
Commands
Version 7.6.1.0
Introduced on S-Series
Version 7.5.1.0
Introduced on C-Series
E-Series legacy command
Note:
You must execute the
no shutdown
command on the VLAN interface for IGMP
Snooping to function.
Activate an interface
Содержание Force10 TeraScale C Series
Страница 1: ...FTOS Command Line Reference Guide FTOS 8 4 2 7 E Series TeraScale C Series S Series S50 S25 ...
Страница 164: ...164 Control and Monitoring w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 176: ...176 802 1ag w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 188: ...188 802 3ah w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 204: ...204 802 1X w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 294: ...294 Access Control Lists ACL w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 428: ...428 Border Gateway Protocol IPv4 BGPv4 w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 456: ...456 Configuration Rollback w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 472: ...472 Dynamic Host Configuration Protocol DHCP w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 484: ...484 Far End Failure Detection FEFD w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 682: ...682 IPv4 Routing w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 732: ...732 IPv6 Basics w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 896: ...896 Layer 2 w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 914: ...914 Link Layer Detection Protocol LLDP w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 926: ...926 Multicast Listener Discovery MLD w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 952: ...952 Multiple Spanning Tree Protocol MSTP w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 976: ...976 Multicast w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 984: ...984 Neighbor Discovery Protocol NDP w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1094: ...1094 Policy based Routing PBR w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1130: ...1130 PIM Sparse Mode PIM SM w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1164: ...1164 Private VLAN PVLAN w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1276: ...1276 Rapid Spanning Tree Protocol RSTP w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1342: ...1342 Service Provider Bridging w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1354: ...1354 sFlow w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1428: ...1428 Spanning Tree Protocol STP w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1444: ...1444 Time and Network Time Protocol NTP w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1464: ...1464 VLAN Stacking w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1494: ...1494 Virtual Router Redundancy Protocol VRRP w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1534: ...1534 C Series Diagnostics and Debugging w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1574: ...1574 E Series Debugging and Diagnostics w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1592: ...1592 S Series Debugging and Diagnostics w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1622: ...1622 Index w w w d e l l c o m s u p p o r t d e l l c o m ...
Страница 1640: ...1640 Command Index w w w d e l l c o m s u p p o r t d e l l c o m ...