Black Box LRU4240 manual Ip ospf network, Default Broadcast type Command Mode interface mode Usage

Dual Trunk E1 Router

ip ospf dead-interval, show ip ospf interface Equivalent Commands

ospf hello-interval

ip ospf network

Use the ip ospf network command to configure the OSPF network type to a type different from the default for the media. Use the no form of this command to return to the default value.

Command Syntax

ip ospf network broadcastnon-broadcastpoint-to-pointpoint-to-multipoint no ip ospf network

broadcast Sets the network type to broadcast. non-broadcast Sets the network type to NBMA. point-to-multipoint Sets the network type to point-to-multipoint. point-to-point Sets the network type to point-to-point.

Default Broadcast type.

Command Mode interface mode

Usage

Use the ip ospf network command to configure Broadcast Networks as Nonbroadcast Multiaccess Networks (NBMA) and vice versa. You would need to do this if you have routers in your network that do not support multicast addressing.

This command saves you from having to configure neighbors. Configuring NBMA networks requires a fully meshed network or a virtual circuit connecting every router. In case the network is not fully meshed, configure the OSPF network type as a point-to- multipoint network. Routing between two routers that are not directly connected will go through a third router that has virtual circuits to both routers.

Examples

The following example shows setting the network to point-to-point type on the fxp0 interface. ospfd# configure terminal

ospfd(config)# interface fxp0 ospfd(config-if)# ip ospf network point-to-point

Equivalent Commands

ospf network

ip ospf priority

Use the ip ospf priority command to set the router priority to determine the designated router for the network. Use the no form of this command to return to the default value.

Command Syntax

ip ospf priority <1-255> (A.B.C.D) no ip ospf priority (A.B.C.D) A.B.C.D = IP address of the interface.

Default

The default priority is 1.

Command Mode

Interface mode

Usage

Set the priority to help determine the OSPF Designated Router (DR) for a network. If two routers attempt to become the DR, the router with the higher router priority becomes the DR. If the router priority is the same for two routers, the router with the higher router ID takes precedence.

Only routers with nonzero router priority values are eligible to become the designated or backup designated router. Configure router priority for multiaccess networks only and not for point-to-point networks.

Examples

The following example shows setting the OSPF priority value to 3 on the fxp0 interface for the IP address 10.10.10.50. ospfd# configure terminal

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