Cisco Systems 78-11741-02 Ospf Configuration Examples, Ospf Point-to-Multipoint Example, IPC-241

Configuring OSPF

OSPF Configuration Examples

Command		Purpose
Router# show ip ospf	neighbor [interface-name]	Displays OSPF neighbor information on a per-interface basis.
[neighbor-id]detail
Router# show ip ospf	request-list [neighbor]	Displays a list of all LSAs requested by a router.
[interface] [interface-neighbor]
Router# show ip ospf	retransmission-list	Displays a list of all LSAs waiting to be resent.
[neighbor] [interface] [interface-neighbor]
Router# show ip ospf	[process-id]summary-address	Displays a list of all summary address redistribution information
		configured under an OSPF process.
Router# show ip ospf	virtual-links	Displays OSPF-related virtual links information.

To restart an OSPF process, use the following command in EXEC mode:

Command	Purpose
Router# clear ip ospf [pid] {process	Clears redistribution based on the OSPF routing process ID. If
redistribution counters [neighbor	the pid option is not specified, all OSPF processes are cleared.
[neighbor-interface][neighbor-id]]}

OSPF Configuration Examples

The following sections provide OSPF configuration examples:

•OSPF Point-to-Multipoint Example

•OSPF Point-to-Multipoint, Broadcast Example

•OSPF Point-to-Multipoint, Nonbroadcast Example

•Variable-Length Subnet Masks Example

•OSPF Routing and Route Redistribution Examples

•Route Map Examples

•Changing OSPF Administrative Distance Example

•OSPF over On-Demand Routing Example

•LSA Group Pacing Example

•Block LSA Flooding Example

•Ignore MOSPF LSA Packets Example

OSPF Point-to-Multipoint Example

In Figure 41, the router named Mollie uses data-link connection identifier (DLCI) 201 to communicate with the router named Neon, DLCI 202 to the router named Jelly, and DLCI 203 to the router named Platty. Neon uses DLCI 101 to communicate with Mollie and DLCI 102 to communicate with Platty. Platty communicates with Neon (DLCI 401) and Mollie (DLCI 402). Jelly communicates with Mollie (DLCI 301). Configuration examples follow the figure.

Cisco IOS IP Configuration Guide

IPC-241