658
Default:
Default: Do not Configure DVMRP tunnel.
Command Mode:
Global Mode
Usage Guide:
Because not all of switches support multicast, DVMRP supports tunnel
multicast communication. The tunnel is a way of transmitted multicast data packet among
DVMRP switches partitioned off switches without supporting multicast routing. It acts as a
virtual network between two DVMRP switches. Multicast data packages packed in
unicast data packages, directly are transmitted to next supporting multicast switch.
DVMRP protocol equally deal with tunnel interface and general physical interface. After
configuring no ip dv multicast-routing, all of the tunnel configurations are deleted.
Example:
Switch(Config)#ip dvmrp tunnel 1 12.1.1.1 24.1.1.1
17.4.4 DVMRP Configuration Examples
As shown in the following figure, add the Ethernet interfaces of Switch A and Switch
B to corresponding vlan, and enable DVMRP on each vlan interface.
Fig 17-3 DVMRP Network Topology Diagram
The configuration procedure for SwitchA and SwitchB is as follows:
(1) Configure SwitchA:
Switch (Config)#ip dvmrp multicast-routing
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
Switch(Config-if-Vlan1)#exit
Switch (Config)#interface vlan2
Switch(Config-if-Vlan2)# ip address 12.1.1.1 255.255.255.0
Switch(Config-if-Vlan2)# ip dvmrp
(2) Configure SwitchB:
Switch (Config)#ip dvmrp multicast-routing
Switch (Config)#interface vlan 1
SwitchB
Vlan 1
Vlan 1
Vlan 2
SwitchA