Enable IGS on a Specific VLAN Interface
Configure Multicast Forwarding Mode
Configuring a Multicast Router Port
Disable a Multicast Router Port
Configure the Multicast Router Port Time-Out Value
Configuring IGS Querier Settings
Configure the IGMP Snooping Query Interval
Configuring the Port-Purge Interval
Disable the Fast Leave Process
Configuring the Report Suppression Interval
Enable the Report Suppression Interval
Disable the Report Suppression Interval
Configuring the Group Query Interval Value
Set the Group Query Interval Value
Reset the Group Query Interval
Configuring the Group Retry Count Value
Set the Group Retry Count Value
Reset the Group Retry Count Value
Reset Report Forwarding to the Default Value
Clearing the Snooping Statistics
Clear the Statistics for a Specific VLAN
Clear the Statistics for All VLANs
Configuring the General Query Transmission Option
Enable the General Query Transmission Option
Disable the General Query Transmission Option
Flow-Based Configuration Example
Configure the MAC-Based Multicast Forwarding Mode
Configure the IP-Based Multicast Forwarding Mode
You can configure an IGS switch to send IGMP queries when no IGMP routers are present in a VLAN. A switch must be configured as a querier for a VLAN only when there are no queriers or routers in the network. If you have questions about the topology used in this section, see Flow-Based Configuration Example. For the default settings, see Default Settings.
SEFOS# configure terminal SEFOS(config)# snooping multicast-forwarding-mode mac
SEFOS(config)# set gmrp disable
SEFOS(config)# ip igmp snooping
SEFOS(config)# vlan 2
SEFOS(config-vlan)# ports extreme-ethernet 0/1-3
SEFOS(config-vlan)# ip igmp snooping querier
SEFOS(config-vlan)# ip igmp snooping query-interval 60 SEFOS(config-vlan)# exit
SEFOS(config)# vlan 3
SEFOS(config-vlan)# ports extreme-ethernet 0/4-5 SEFOS(config-vlan)# exit
SEFOS# show ip igmp snooping globals Snooping Configuration ----------------------------- IGMP Snooping globally enabled IGMP Snooping is operationally enabled IGMP Snooping Enhanced mode is disabled Transmit Query on Topology Change globally disabled Multicast forwarding mode is MAC based Proxy globally disabled Proxy reporting globally enabled Filter is disabled Router port purge interval is 125 seconds Port purge interval is 260 seconds Report forward interval is 5 seconds Group specific query interval is 2 seconds Reports are forwarded on router ports Group specific query retry count is 2 Multicast VLAN disabled Leave config level is Vlan based
SEFOS# show ip igmp snooping vlan 2 Snooping VLAN Configuration for the VLAN 2 IGMP Snooping enabled IGMP configured version is V3 Fast leave is disabled Snooping switch is configured as Querier Snooping switch is acting as Querier Query interval is 60 seconds Port Purge Interval is 130 seconds Max Response Code is 100, Time is 10 seconds
SEFOS# show vlan id 2 Vlan database-------------Vlan ID : 2Member Ports : Ex0/1, Ex0/2, Ex0/3Untagged Ports : NoneForbidden Ports : NoneName :Status : Permanent----------------------------------------------------
SEFOS# show vlan id 3 Vlan ID : 3Member Ports : Ex0/4, Ex0/5Untagged Ports : NoneForbidden Ports : NoneName :Status : Permanent----------------------------------------------------
Because VLAN 2 is configured as a querier, the switch sends a general query every 60 seconds on the member ports of VLAN 2.