Configuring DVMRP
Fixed Switch Configuration Guide 19-19
Basic DVMRP Configuration
By default, DVMRP is disabled globally and on each interface. Basic DVMRP configuration
includes the following steps:
1. Creating and enabling VLANs.
2. Enabling IGMP globally on the device and on the VLANs.
3. Enabling DVMRP globally on the device and on the VLANs.
Procedure 19-3 describes the basic steps to configure DVMRP on fixed switches with advanced
routing enabled. Procedure 19-3 assumes VLANs have been configured and enabled with IP
interfaces.
Example DVMRP Configuration
Figure 19-5 on page 19-19 illustrates the DVMRP configuration of two Enterasys devices shown in
the example below. This example assumes the following:
• VLANs have been configured and enabled with IP interfaces
• IGMP has been enabled on the VLANs
Figure 19-5 DVMRP Configuration on Two Routers
Router R1 Configuration
For the VLAN 1 interface, which provides connection to Router R2, an IP address is assigned and
DVMRP is enabled. For the VLAN 2 interface, which provides connection to the host network, an
IP address is assigned and DVMRP is enabled.
System1(su)->router
System1(su)->router>enable
Procedure 19-3 Basic DVMRP Configuration
Step Task Command
1. In router configuration mode, enable IGMP globally. ip igmp
2. In router configuration mode, enable DVMRP
globally.
ip dvmrp
3. In router configuration mode, enable IGMP on each
VLAN interface on which DVMRP will run.
ip igmp enable
4. In router configuration mode, enable DVMRP for
each VLAN interface on which DVMRP will run.
ip dvmrp enable
VLAN 2
VLAN 3
VLAN 1
192.40.0.1
192.20.0.1
192.0.1.2
192.0.1.1
Router R1
Router R2