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2-17 
  Total 1 IP Group(s). 
  Total 1 MAC Group(s). 
 
  Vlan(id):100. 
    Total 1 IP Group(s). 
    Total 1 MAC Group(s). 
    Static Router port(s): 
    Dynamic Router port(s): 
                     GigabitEthernet1/0/1 
    IP group(s):the following ip group(s) match to one mac group. 
        IP group address: 224.1.1.1 
        Static host port(s): 
        Dynamic host port(s): 
                     GigabitEthernet1/0/3          GigabitEthernet1/0/4 
    MAC group(s): 
        MAC group address: 0100-5e01-0101 
        Host port(s):GigabitEthernet1/0/3          GigabitEthernet1/0/4 
As shown above, the multicast group 224.1.1.1 is established on Switch A, with the dynamic router port 
GigabitEthernet1/0/1 and dynamic member ports GigabitEthernet1/0/3 and GigabitEthernet1/0/4. This 
means that Host A and Host B have joined the multicast group 224.1.1.1. 
Configuring Multicast VLAN 
Network requirements 
As shown in 
, Workstation is a multicast source. Switch A forwards multicast data from the 
multicast source. A Layer 2 device, Switch B forwards the multicast data to the end users Host A and 
Host B.  
 describes the network devices involved in this example and the configurations you should 
make on them. 
Table 2-2 Network devices and their configurations 
Device 
Device description
Networking description 
Switch A 
Layer 3 device 
The interface IP address of VLAN 20 is 168.10.1.1. 
GigabitEthernet 1/0/1 is connected to the workstation and 
belongs to VLAN 20. 
The interface IP address of VLAN 10 is 168.10.2.1. 
GigabitEthernet 1/0/10 belongs to VLAN 10. 
GigabitEthernet 1/0/10 is connected to Switch B. 
Switch B 
Layer 2 device 
VLAN 2 contains GigabitEthernet 1/0/1 and VLAN 3 
contains GigabitEthernet 1/0/2. The two ports are 
connected to Host A and Host B, respectively. 
VLAN 10 includes GigabitEthernet 1/0/10, 
GigabitEthernet1/0/1, and GigabitEthernet 1/0/2. 
GigabitEthernet 1/0/10 is connected to Switch A. VLAN 10 
is a multicast VLAN. 
Host A 
User 1 
Host A is connected to GigabitEthernet 1/0/1 on Switch B.
Host B 
User 2 
Host B is connected to GigabitEthernet 1/0/2 on Switch B.