Configuring Ospf Virtual Links; Configuring Ospf Interface Parameters Overview - Juniper NETWORK AND SECURITY MANAGER 2010.4 - CONFIGURING SCREENOS DEVICES GUIDE REV 01 Manual

Configuring OSPF Virtual Links

Related
Documentation

Configuring OSPF Interface Parameters Overview

Copyright © 2010, Juniper Networks, Inc.
Routes learned from BGP
Directly connected routes
Imported routes
Statically configured routes
When you configure route redistribution, you must first specify a route map to filter the
routes that are redistributed.
All areas must connect to area 0, which is the backbone. Area 0 is defined by default on
the virtual router when you enable the OSPF routing instance on the virtual router. For
areas that cannot be physically connected to the backbone area, you must configure a
virtual link to provides the remote area with a logical path to the backbone through
another area.
To enable a virtual link, the virtual link must exist on routers at both ends of the link.
Specifically, you must configure:
Area ID—The ID of the OSPF area through which the virtual link passes. You cannot
create a virtual link that passes through the backbone area or a stub area.
Router ID—The ID of the router at the other end of the virtual link.
Configuring Route Preferences on page 312
Dynamic Routing Configuration Overview on page 313
OSPF Protocol Configuration Overview on page 313
Configuring OSPF Interface Parameters Overview on page 317
By default, OSPF is disabled on all interfaces in the VR. You must enable OSPF on an
interface before OSPF can use that interface to transmit receive packets. When you
disable OSPF on an interface, OSPF does not transmit or receive packets on the specified
interface, but interface configuration parameters are preserved.
For instructions for configuring OSPF settings on the virtual router and on the interface,
see the Network and Security Manager Online Help.
You can enable OSPF on Ethernet and tunnel interfaces. When configuring OSPF on a
tunnel interface, you can configure additional parameters to keep OSPF tunnel traffic to
a minimum.
The OSPF interface parameters are displayed in Table 77 on page 318.
Chapter 10: Routing
317