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Configuring the Switch
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3
DVMRP Interface Settings
• VLAN – Selects a VLAN interface on this router.
• Metric – Sets the metric for this interface used to calculate distance vectors.
• Status – Enables or disables DVMRP.
- If DVMRP is enabled on any interface, Layer 3 IGMP should also be enabled on
the router (page 3-176).
- If DVMRP is disabled, the interface cannot propagate IP multicast routing
information. However, as long as IGMP snooping is enabled, the interface will
still forward multicast traffic to downstream group members within the VLAN. But
if IGMP snooping is disabled, then the interface will flood incoming multicast
traffic to all ports in the attached VLAN.
Web – Click Routing Protocol, DVMRP, Interface Settings. Select a VLAN from the
drop-down box under DVMRP Interface Settings, modify the Metric if required, set
the Status to Enabled or Disabled, and click Apply.
Figure 3-151 DVMRP Interface Settings
CLI – This example enables DVMRP and sets the metric for VLAN 1.
Console(config)#interface vlan 1 4-143
Console(config-if)#ip dvmrp 4-303
Console(config-if)#ip dvmrp metric 2 4-304
Console(config-if)#end
Console#show ip dvmrp interface 4-307
Vlan 1 is up
DVMRP is enabled
Metric is 2
Console#