3-10
Port-Based Multicast VLAN Configuration
Network requirements
z As shown in Figure 3-5, Router A connects to a multicast source (Source) through GigabitEthernet
1/0/1, and to Switch A through GigabitEthernet 1/0/2.
z IGMPv2 is required on Router A. IGMPv2 Snooping is required on Switch A. Router A acts as the
IGMP querier.
z Switch A’s GigabitEthernet 1/0/1 belongs to VLAN 10, GigabitEthernet 1/0/2 through
GigabitEthernet 1/0/4 belong to VLAN 2 through VLAN 4 respectively, and Host A through Host C
are attached to GigabitEthernet 1/0/2 through GigabitEthernet1/0/4 of Switch A respectively.
z The multicast source sends multicast data to multicast group 224.1.1.1. Host A, Host B, and Host
C are receivers of the multicast group.
z Configure the port-based multicast VLAN feature so that Router A just sends multicast data to
Switch A through the multicast VLAN and Switch A forwards the multicast data to the receivers
that belong to different user VLANs.
Network diagram
Figure 3-5 Network diagram for port-based multicast VLAN configuration
Source
Receiver
Host A
VLAN 2
GE1/0/2
GE1/0/3
GE1/0/4
Switch A
IGMP querier
Router A
GE1/0/1
1.1.1.2/24
GE1/0/2
10.110.1.1/24
1.1.1.1/24
Receiver
Host B
VLAN 3
Receiver
Host C
VLAN 4
GE1/0/1
Configuration procedure
1) Configure IP addresses
Configure the IP address and subnet mask for each interface as per
Figure 3-5. The detailed
configuration steps are omitted here.
2) Configure Router A
# Enable IP multicast routing, enable PIM-DM on each interface, and enable IGMP on the host-side
interface GigabitEthernet 1/0/2.
<RouterA> system-view
[RouterA] multicast routing-enable
[RouterA] interface gigabitethernet 1/0/1
[RouterA-GigabitEthernet1/0/1] pim dm
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