Dual Trunk E1 Router

ospfd# configure terminal ospfd(config)# interface fxp0 ospfd(config-if)# ospf hello-interval 3 10.10.10.50

Equivalent Commands ip ospf hello-interval

ospf network

Use the ospf network command to configure the OSPF network type to a type other than the default for a given medium. Use the no form of this command to return to the default value.

Command Syntax

ospf network broadcastnon-broadcastpoint-to-multipointpoint-to-point no ospf network

broadcast Specifies OSPF braodcast as a multi-access network. 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

The default is the broadcast type.

Command Mode

Interface mode

Usage

Use 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.

The ospf network 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 the 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)# ospf network point-to-point

Equivalent Commands

ip ospf network

ospf priority

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

Command Syntax ospf priority <1-255>

no ospf priority

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 becomes DR.

Only a router with a nonzero router priority value is 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 IP address 10.10.10.50.

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Dual Trunk E1 Router User’s Guide

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Black Box LRU4240 Equivalent Commands ip ospf hello-interval, Ospf network, Ospf priority, Command Syntax ospf priority