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7.2.2
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Multicast addressing
Switch(config)#ip igmp snooping
Switch(config)#ip igmp snooping vlan vlan-id immediate-leave
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7.2.5
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IGMP and CGMP operation
Switch(config)#ip igmp snooping vlan vlan-id mrouter learn cgmp
Switch(config)#ip igmp snooping vlan vlan-id mrouter learn pim-dvmrp
Switch(config)#ip igmp snooping vlan vlan-id mrouter interface inteface-id
Switch(config)#show mac-address-table multicast [vlan vlan-id] [user | igmp-snooping] [count]
Router(config-if)#ip cgmp
Note: CGMP is no longer supported on the new series of Catalyst switched including
the 2950 & 3550 series. IGMP Snooping has replaced CGMP on these models.
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7.3.11
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Configure IP multicast routing
Router(config)#ip multicast-routing
Router(config-if)#ip pim sparse-mode
Router(config)#ip pim rp-address <address>
Riouter(config-if)#ip pim sparse-dense-mode
Router#show ip pim interface [type number] [count]
Router#show ip pim neighbor type number
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7.3.14
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Optional multicast routing tasks
Router(config)#ip pim send-rp-announce type number scope ttl group-list access-list-number
Router#no ip pim send-rp-announce
Router#(config)ip pim send-rp-discovery scope ttl
Router#no ip pim send-rp-discovery
Router(config-if)#ip multicast ttl-threshold ttl
Router(config-if)#no ip multicast ttl-threshold
Router(config-if)#ip igmp join-group group-address
Router(config-if)#no ip igmp join-group group-address command.
Router#show ip igmp interface type-number
Router(config-if)#ip igmp version {3 | 2 | 1}
Router(config)#no ip igmp version
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7.6.7
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Implementing IP telephony with auxiliary VLANs
Switch(config)#mls qos
Switch(config-if)#mls qos trust
Switch(config-if)#switchport voice vlan {vlan-id | dot1p | none | untagged}
Switch#show interfaces interface-id switchport
Switch(config-if)#no switchport voice vlan
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