Manual

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243
Multicast Strategy Configuration
Multicast Strategy uses the manner of specifying priority for specified multicast data to achieve
and guarantee the effects the specific user requires. It is noticeable that multicast data can not
get a special care all along unless the data are transmitted at TRUNK port. The configuration is
very simple, it has only one command, i.e. to set priority for the specified multicast. The
commands are as follows:
Command
Explanation
Global Configuration Mode
[no] ip multicast policy <IPADDRESS/M>
<IPADDRESS/M> cos <priority>
Configure multicast strategy, specify
priority for sources and groups in
specific range, and the range is <0-7>.
28.8.3 DCSCM Configuration Examples
Source Control
In order to prevent an Edge Switch from putting out multicast data ad asbitsium, we configure
Edge Switch so that only the switch at port Ethernet1/0/5 is allowed to transmit multicast, and
the data group must be 225.1.2.3. Also, switch connected up to port Ethernet1/0/10 can
transmit multicast data without any limit, and we can make the following configuration.
EC(config)#access-list 5000 permit ip any host 225.1.2.3
EC(config)#access-list 5001 permit ip any any
EC(config)#ip multicast source-control
EC(config)#interface ethernet1/0/5
EC(Config-If-Ethernet1/0/5)#ip multicast source-control access-group 5000
EC(config)#interface ethernet1/0/10
EC(Config-If-Ethernet1/0/10)#ip multicast source-control access-group 5001
Destination Control
We want to limit users with address in 10.0.0.0/8 network segment from entering the group of
238.0.0.0/8, so we can make the following configuration:
Firstly enable IGMP snooping in the VLAN it is located (Here it is assumed to be in VLAN2)
EC(config)#ip igmp snooping
EC(config)#ip igmp snooping vlan 2
After that, configure relative destination control access-list, and configure specified IP address
to use that access-list.
Switch(config)#access-list 6000 deny ip any 238.0.0.0 0.255.255.255
Switch(config)#access-list 6000 permit ip any any
Switch(config)#multicast destination-control
Switch(config)#ip multicast destination-control 10.0.0.0/8 access-group 6000
In this way, users of this network segment can only join groups other than 238.0.0.0/8.