Multicast Routing Commands 4

default-gateway

This command specifies the default DVMRP gateway for IP multicast traffic. Use the no form to remove the default gateway.

Syntax

default-gateway ip-addressno default-gateway

ip-address- IP address of the default DVMRP gateway.

Default Setting

None

Command Mode

Router Configuration

Command Usage

•The specified interface advertises itself as a default route to neighboring DVMRP routers. It advertises the default route out through its other interfaces. Neighboring routers on the other interfaces return Poison Reverse messages for the default route back to the router. When the router receives these messages, it records all the downstream routers for the default route.

•When multicast traffic with an unknown source address (i.e., not found in the route table) is received on the default upstream route interface, the router forwards this traffic out through the other interfaces (with known downstream routers). However, when multicast traffic with an unknown source address is received on another interface, the router drops it because only the default upstream interface can forward multicast traffic from an unknown source.

Example

Console(config-router)#default-gateway 10.1.0.253

Console(config-router)#

ip dvmrp

This command enables DVMRP on the specified interface. Use the no form to disable DVMRP on this interface.

Syntax

ip dvmrp no ip dvmrp

Default Setting

Disabled

Command Mode

Interface Configuration (VLAN)

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Microsoft ES4649, ES4625 manual Multicast Routing Commands Default-gateway, Ip dvmrp
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ES4649, ES4625 specifications

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