Digitalchina Networks DCS-3950 series User Manual

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DCS-3950 series Ethernet switch manual
Command mode: Global Mode
Usage Guide:
The command configuration modifies to a specified value through the switch
matching priority of specified range multicast data package, and the TOS is specified to
the same value simultaneously. Carefully, the packet transmitted in UNTAG mode does
not modify its priority.
Example:
Switch(Config)#ip multicast policy 10.1.1.0 0.0.0.255 225.1.1.0 0.0.0.255 cos 7
13.3 DCSCM Typical Example
1. Souce control
To prevent a boundary switch to send multicast data freely, we configure on the
boundary switch that, only the switch connected to port Ethernet0/0/5 is allowed to send
multicast data, and the group of the data has to be 225.1.2.3. But the uplink port
Ethernet0/0/25 can forward multicast data without limitation. The following is the
configuration we can make:
Switch(Config)#access-list 5000 permit ip any host 225.1.2.3
Switch(Config)#access-list 5001 permit ip any any
Switch(Config)#ip multicast source-control
Switch(Config)#interface Ethernet0/0/5
Switch(Config-If-Ethernet0/0/5)#ip multicast source-control access-group 5000
Switch(Config)#interface Ethernet0/0/25
Switch(Config-If-Ethernet0/0/25)#ip multicast source-control access-group 5001
2. Destination control
We can confiure as follows if we want to prevent the users in 10.0.0.0/8 segment to
join the group 238.0.0.0/8：
Firstly, to enable IGMP snooping in the VLAN it is in(assumed to be VLAN2)
Switch(Config)#ip igmp snooping
Switch(Config)#ip igmp snooping vlan 2
Then, configure the relative detination control ACL, and configure the specified IP to
use the ACL.
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)#ip multicast destination-control
Switch(Config)#ip multicast destination-control 10.0.0.0 0.255.255.255 access-group
6000
Thus, the users of this segment can only join the groups other than 238.0.0.0/8
3. Multicast policy
Server 210.1.1.1 is sending important multicast data in the group 239.1.2.3 上, we can
configure as follows on its access switch :
Switch(Config)#ip multicast policy 210.1.1.1 0.0.0.0 239.1.2.3 0.0.0.0 cos 4
Thus when the multicast strem is passing the TRUNK of this switch to other switches,

Digitalchina Networks DCS-3950 series Specifications

General

Brand	Digitalchina Networks
Model	DCS-3950 series
Category	Network Router
Language	English