Commands

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Module 7: Cisco AVVID

7.2.2

Multicast addressing

> Switch(config)#ip igmp snooping
> Switch(config)#ip igmp snooping vlan vlan-id immediate-leave

7.2.5

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.

7.3.11

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

7.3.14

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

7.6.7

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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