Purpose; Ip Dvmrp; Configuring Dvmrp; Commands - Enterasys Matrix DFE-Gold Series Configuration Manual

Configuring DVMRP

Configuring DVMRP

Purpose

To enable and configure the Distance Vector Multicast Routing Protocol (DVMRP) on an interface.
DVMRP routes multicast traffic using a technique known as Reverse Path Forwarding. When a
router receives a packet, it floods the packet out of all paths except the one that leads back to the
packet's source. Doing so allows a data stream to reach all VLANs (possibly multiple times). If a
router is attached to a set of VLANs that do not want to receive from a particular multicast group,
the router can send a "prune" message back up the distribution tree to stop subsequent packets
from traveling where there are no members. DVMRP will periodically reflood in order to reach
any new hosts that want to receive from a particular group.

Commands

For information about...

ip dvmrp

ip dvmrp metric
show ip dvmrp route
ip dvmrp
Use this command to enable or disable DVMRP on an interface.
Syntax
ip dvmrp
no ip dvmrp
Parameters
None.
Defaults
None.
Mode
Router command, Interface configuration: Matrix>Router(config‐if(Vlan 1))#
Usage
IGMP must be enabled on all VLANs running DVMRP. To do this, use the set igmp enable
command as described in "set igmp enable" on page 9‐3. It is also recommended that IGMP
querying be enabled on all VLANs running DVMRP. To do this, use the set igmp query‐enable
command as described in "set igmp query‐enable" on page 9‐6.
21-52 Routing Protocol Configuration
Note: IGMP must be enabled on all VLANs running DVMRP. To do this, use the set igmp enable
command as described in
querying be enabled on all VLANs running DVMRP. To do this, use the set igmp query-enable
command as described in
"set igmp enable" on page 9-3. It is also recommended that IGMP
"set igmp query-enable" on page 9-6.
ip dvmrp
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