- 1). Click the "Start" button, then click "Run," type "cmd" and press the "Enter" key. The command line window will appear.
- 2). Type "telnet x.x.x.x," substituting the "x.x.x.x" with the IP address of a Cisco switch. Press the "Enter" key to connect to the Cisco switch.
- 3). Type the telnet password when requested in order to access the Cisco command line (CLI), and then press the "Enter" key.
- 4). Type "enable" and press the "Enter" key, and then type the Privilege Exec password and press the "Enter" key.
- 5). Type "config term" and press the "Enter" key. Type "ip igmp snooping" and then press the "Enter" key. If the switch is configured for OSI layer 2 forwarding only, then no further multicast configuration is required. However, if the switch has routing services enabled, proceed to step 6.
- 6). Type "ip multicast-routing" and press the "Enter" key. Type "interface fastethernet 1/1," substituting "fastethernet 1/1" with the name of an interface that interconnects with a switch or router, and then press the "Enter" key. The command prompt is now in the interface mode context.
- 7). Type "ip pim dense-mode" and press the "Enter" key. Perform this command on each interface that connects to another switch or router. This command must be run after executing the "interface" command to enter interface mode for the specific interface that will have multicast routing enabled.
- 8). Type "exit" and press the "Enter" key, and then type "exit" and press the "Enter" key again. Type "copy run start" and press the "Enter" key to save the configuration.
- 9). Perform this procedure on each switch in the network infrastructure that will be forwarding multicast traffic.
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