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Configuring DVMRP Configuring DVMRP
OmniSwitch 6800/6850/9000 Advanced Routing Configuration Guide December 2007 page 6-11
Enabling DVMRP on a Specific Interface
Note. It does not matter whether DVMRP is first enabled globally or on specific interfaces. However,
DVMRP will not run on an interface until it is enabled both globally and on the interface.
DVMRP must be enabled on an interface before any other interface-specific DVMRP command can be
executed (e.g, the ip dvmrp interface metric command). An interface can be any IP router port that has
been assigned to an existing VLAN. For information on assigning a router port to a VLAN, refer to the
“Configuring VLANs” chapter in the OmniSwitch 6800/6850/9000 Network Configuration Guide.
To enable DVMRP on a specific interface, use the ip dvmrp interface command. The interface identifier
used in the command syntax is the valid IP address of an existing VLAN router port. For example:
-> ip dvmrp interface vlan-2
Note. Only one multicast routing protocol is supported per interface. This means that you cannot enable
both PIM-SM and DVMRP on the same interface.
Disabling DVMRP on a Specific Interface
To disable DVMRP on a specific IP interface, use the no ip dvmrp interface command. Be sure to
include the interface IP address. For example:
-> no ip dvmrp interface vlan-2
Specifying a Distance Metric on a Specific Interface
The ip dvmrp interface metric command enables you to specify the distance metric for an interface. The
default interface distance metric value is 1. DVMRP uses the metric value to determine the most cost-
effective way of passing data. The higher an interface’s metric value, the higher the cost of passing data
over that interface. DVMRP will transmit data over the interface with the lowest available metric. Note
that, just as in RIP, the metric of an incoming route advertisement is automatically incremented by the
metric of the incoming interface (typically one hop). You can assign an interface any distance metric from
1 to 31.
To assign a distance metric to a specific interface, use the ip dvmrp interface metric command. The
command syntax must include the IP address for the VLAN router port (i.e., interface), as well as a
distance metric value. For example:
-> ip dvmrp interface vlan-2