Configuring DVMRP
19-20 Configuring Multicast
System1(su)->router#configure
Enter configuration commands:
System1(su)->router(Config)#ip igmp
System1(su)->router(Config)#ip dvmrp
System1(su)->router(Config)#interface vlan 1
System1(su)->router(Config-if(Vlan 1))#ip address 192.0.1.2 255.255.255.0
System1(su)->router(Config-if(Vlan 1))#ip igmp enable
System1(su)->router(Config-if(Vlan 1))#ip dvmrp enable
System1(su)->router(Config-if(Vlan 1))#no shutdown
System1(su)->router(Config-if(Vlan 1))#exit
System1(su)->router(Config)#interface vlan 2
System1(su)->router(Config-if(Vlan 2))#ip address 192.40.0.1 255.255.255.0
System1(su)->router(Config-if(Vlan 2))#ip igmp enable
System1(su)->router(Config-if(Vlan 2))#ip dvmrp enable
System1(su)->router(Config-if(Vlan 2))#no shutdown
System1(su)->router(Config-if(Vlan 2))#exit
Router R2 Configuration
For the VLAN 1 interface, which provides connection to the Router R1, an IP address is assigned
and DVMRP is enabled. For the VLAN 3 interface which provides connection to the host network,
an IP address is assigned and DVMRP is enabled.
System2(su)->router
System2(su)->router>enable
System(1su)->router#configure
Enter configuration commands:
System2(su)->router(Config)#ip igmp
System2(su)->router(Config)#ip dvmrp
System2(su)->router(Config)#interface vlan 1
System2(su)->router(Config-if(Vlan 1))#ip address 192.0.1.1 255.255.255.0
System2(su)->router(Config-if(Vlan 1))#ip igmp enable
System2(su)->router(Config-if(Vlan 1))#ip dvmrp enable
System2(su)->router(Config-if(Vlan 1))#no shutdown
System2(su)->router(Config-if(Vlan 1))#exit
System2(su)->router(Config)#interface vlan 3
System2(su)->router(Config-if(Vlan 3))#ip address 192.20.0.1 255.255.255.0
System2(su)->router(Config-if(Vlan 3))#ip igmp enable
System2(su)->router(Config-if(Vlan 3))#ip dvmrp enable
System2(su)->router(Config-if(Vlan 3))#no shutdown
System2(su)->router(Config-if(Vlan 3))#exit
Displaying DVMRP Information
Table 19-8 lists the DVMRP show commands for the fixed switches that support and have enabled
advanced routing.