Chapter 9: Multicast 145
Section 9-2
ports 2/1 and 2/3 as permanent members. These switch ports are assigned to a common
VLAN 199.
(global) interface fastethernet 2/1
(interface) ip igmp snooping
(interface) ip igmp snooping fast-leave
(interface) switchport access vlan 199
(global) interface fastethernet 2/3
(interface) ip igmp snooping
(interface) ip igmp snooping fast-leave
(interface) switchport access vlan 199
(global) interface vlan 199
(interface) ip igmp snooping static 0100.5364.0123 interface fastethernet 2/1
(interface) ip igmp snooping static 0100.5364.0123 interface fastethernet 2/3
Displaying Information About IGMP Snooping
Table 9-1 lists some switch commands that you can use to display helpful information
about IGMP snooping.
Table 9-1 Commands to Display IGMP Snooping Information
Display Function Command
IGMP statistics
(exec) show ip igmp interface interface
interface-number
Multicast routers discovered
(exec) show ip igmp snooping mrouter
interface vlan vlan-id
Number of multicast groups in a VLAN
(exec) show mac-address-table multicast
vlan-id count
Multicast group information
(exec) show mac-address-table multicast
{mac-group-address [vlan-id]}
IGMP snooping on an interface
(exec) show ip igmp interface vlan-id
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