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142 CHAPTER 16: MULTICAST CONFIGURATION GUIDE
vlan 100
igmp-snooping enable
igmp-snooping querier
#
interface Ethernet1/0/1
port access vlan 100
#
interface Ethernet1/0/2
port access vlan 100
#
Configuration on Switch B
#
unknown-multicast drop enable
#
igmp-snooping enable
#
vlan 100
igmp-snooping enable
#
interface Ethernet1/0/1
port access vlan 100
#
interface Ethernet1/0/2
port access vlan 100
#
interface Ethernet1/0/3
port access vlan 100
#
Configuration on Switch C
#
igmp-snooping enable
#
vlan 100
igmp-snooping enable
#
interface Ethernet1/0/1
port access vlan 100
#
interface Ethernet1/0/2
port access vlan 100
#
interface Ethernet1/0/3
port access vlan 100
#
Configuring Multicast
VLAN
In the traditional multicast-on-demand mode, when users in different VLANs on a
Layer 2 device need multicast information, the multicast router needs to forward a
separate copy of the multicast data to each of these VLANs. This mode wastes a
great deal of bandwidth.
With the multicast VLAN feature, you can configure a VLAN as the multicast
VLAN, which can be used to transmit multicast traffic to users in different VLANs.