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Cisco 3200 Series Router Hardware Reference
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Appendix C Switch Port Functionality
IGMP Snooping
To verify IGMP snooping, use the show mac-address-table multicast igmp-snooping command:
Router# show mac-address-table multicast igmp-snooping
To verify the multicast routing table, use the show ip mroute command:
Router# sh ip mroute
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