PLANET XGS3-24042 - Manual (Page 437)

48-36
Switch (config)#interface vlan 1
Switch(Config-if-Vlan1)# ip address 10.1.1.1 255.255.255.0
Switch(Config-if-Vlan1)# ip dvmrp enable
(2) Configure SwitchB:
Switch (config)#ip dvmrp multicast-routing
Switch (config)#interface vlan 1
Switch(Config-if-Vlan1)# ip address 12.1.1.2 255.255.255.0
Switch(Config-if-Vlan1)# ip dvmrp enable
Switch(Config-if-Vlan1)#exit
Switch (config)#interface vlan 2
Switch(Config-if-Vlan2)# ip address 20.1.1.1 255.255.255.0
Switch(Config-if-Vlan2)# ip dvmrp
Since DVMRP itself does not rely on Unicast Routing Protocol, it is not necessary to configure Unicast
Routing Protocol. This is the difference from PIM-DM and PIM-SM.
48.7.4 DVMRP Troubleshooting
In configuring and using DVMRP Protocol, DVMRP Protocol might not operate normally caused by physical
connection or incorrect configuration. Therefore, the user should pay attention to the following issues:
 Firstly to assure that physical connection is correct;
 Next, to assure the Protocol of Interface and Link is UP (use show interface command);
 Please check if the correct IP address is configured on the interface (use ip address command);
 Afterwards, enable DVMRP Protocol on the interface (use ip dvmrp command and ip dv
multicast-routing command);
 Multicast Protocol requires RPF Check using unicast routing; therefore the correctness of unicast
routing must be assured beforehand. (DVMRP uses its own unicast table, please use show ip dvmrp
route command to look up).
If all attempts including Check are made but the problems on DVMRP can’t be solved yet, then please use
commands such as debug DVMRP, and then copy DEBUG information in 3 minutes and send to Technology
Service Center.
48.8 DCSCM
48.8.1 Introduction to DCSCM
DCSCM (Destination control and source control multicast) technology mainly includes three aspects, i.e.
Multicast Packet Source Controllable, Multicast User Controllable and Service-Oriented Priority Strategy
Multicast.