Alcatel Carrier Internetworking Solutions 060187-10 REV D manual Configuring Ospf

Configuring OSPF Configuring OSPF

Configuring OSPF

Configuring OSPF on a router requires several steps. Depending on your requirements, you may not need to perform all of the steps listed below.

By default, OSPF is disabled on the router. Configuring OSPF consists of these tasks:

•Set up the basics of the OSPF network by configuring the required VLANs, assigning ports to the VLANs, and assigning router identification numbers to the routers involved. This is described in “Preparing the Network for OSPF” on page 1-16.

•Enable OSPF. When the image file for advanced routing (Hadvrout.img) is installed, you must load the code and enable OSPF. The commands for enabling OSPF are described in “Activating OSPF” on page 1-17.

•Create an OSPF area and the backbone. The commands to create areas and backbones are described in “Creating an OSPF Area” on page 1-18.

•Set area parameters (optional). OSPF will run with the default area parameters, but different networks may benefit from modifying the parameters. Modifying area parameters is described in “Configuring Stub Area Default Metrics” on page 1-20.

•Create OSPF interfaces. OSPF interfaces are created and assigned to areas. Creating areas is described in “Creating an Interface” on page 1-22, and assigning areas is described in “Assigning an Interface to an Area” on page 1-22.

•Set interface parameters (optional). OSPF will run with the default interface parameters, but different networks may benefit from modifying the parameters. Also, it is possible to set authentication on an interface. Setting interface authentication is described in “Interface Authentication” on page 1-23, and modifying interface parameters is described in “Modifying Interface Parameters” on page 1-24.

•Configure virtual links (optional). A virtual link is used to establish backbone connectivity when two backbone routers are not physically contiguous. To create a virtual link, see “Creating Virtual Links” on page 1-25.

•Create a redistribution policy (optional). A redistribution policy allows for the control of how routes are advertised into OSPF from outside the Autonomous System. Once a policy is created, redistribu- tion must be enabled. Creating a redistribution policy is described in “Creating A Redistribution Policy” on page 1-27, and enabling redistribution is described in “Enabling Redistribution” on page 1-26.

•Create redistribution filters (optional). A redistribution filter controls whether routes are advertised in the OSPF network. Creating a redistribution filter is described in “Creating a Redistribution Filter” on page 1-27.

•Configuring router capabilities (optional). There are several commands that influence router operation. These are covered briefly in a table in “Configuring Router Capabilities” on page 1-29.

•Creating static neighbors (optional). These commands allow you to statically configure neighbors. See “Configuring Static Neighbors” on page 1-30.

•Configuring redundant switches in a stack for graceful OSPF restart (optional). Configuring stacks with redundant switches for graceful restart is described in “Configuring Redundant Switches in a Stack for Graceful Restart” on page 1-31.

At the end of the chapter is a simple OSPF network diagram with instructions on how it was created on a router-by-router basis. See “OSPF Application Example” on page 1-32for more information.

OmniSwitch 6600 Family Advanced Routing Configuration Guide March 2005 page 1-15