Configuring Igmp Snooping - Cisco Catalyst 4500 Series Configuration Manual

Chapter 25 Configuring IGMP Snooping and Filtering

Configuring IGMP Snooping

When configuring IGMP, configure the VLAN in the VLAN database mode. See
Note
"Configuring VLANs, VTP, and VMPS."
IGMP snooping allows switches to examine IGMP packets and make forwarding decisions based on their
content.
These sections describe how to configure IGMP snooping:
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Default IGMP Snooping Configuration
Table 25-1
Table 25-1
Feature
IGMP snooping
Multicast routers
Explicit Host Tracking
Immediate-leave processing
Report Suppression
IGMP snooping learning method
1. PIM/DVMRP = Protocol Independent Multicast/Distance Vector Multicast Routing Protocol
OL-25340-01
Default IGMP Snooping Configuration, page 25-5
Enabling IGMP Snooping Globally, page 25-6
Enabling IGMP Snooping on a VLAN, page 25-6
Configuring Learning Methods, page 25-7
Configuring a Static Connection to a Multicast Router, page 25-8
Enabling IGMP Immediate-Leave Processing, page 25-8
Configuring the IGMP Leave Timer, page 25-9
Configuring IGMP Snooping Querier, page 25-10
Configuring Explicit Host Tracking, page 25-11
Configuring a Host Statically, page 25-11
Suppressing Multicast Flooding, page 25-12
shows the IGMP snooping default configuration values.
IGMP Snooping Default Configuration Values
Default Value
Enabled
None configured
Enabled for IGMPv3; Not available for IGMPv2
Enabled for IGMPv3; Disabled for IGMPv2
Enabled
1
PIM/DVMRP
Software Configuration Guide-Release IOS XE 3.3.0SG and IOS 15.1(1)SG
Configuring IGMP Snooping
Chapter 15,
25-5