Cisco 7604 Configuration Guide - Page 158

Configuring OSPF Chapter 8 Configuring IP Routing and DHCP Services - Every router within the same area must agree that the area is NSSA; otherwise, the routers will not be able to communicate. Configuring a Point-To-Point, Non-Broadcast OSPF Neighbor You need to define a static OSPF neighbor to advertise OSPF routes over a point-to-point, non-broadcast network. When an interface is configured as point-to-point, the following restrictions apply: • You can define only one OSPF neighbor for the interface. • You need to define a static route pointing to the OSPF neighbor if it is not on a directly connected network. • The interface cannot form adjacencies unless neighbors are configured explicitly. To define an OSPF neighbor on a point-to-point, non-broadcast network, perform the following tasks: Step 1 Step 2 Step 3 If the OSPF neighbor is not on a directly-connected network, create a static route to the OSPF neighbor. Do not use the default route. See the "Configuring a Static Route" section on page 8-3 for more information about creating static routes. Define the OSPF neighbor by performing the following tasks: a. Enter router configuration mode for the OSPF process. Enter the following command: hostname(config)# router ospf pid b. Define the OSPF neighbor by entering the following command: hostname(config-router)# neighbor addr [interface if_name] The addr argument is the IP address of the OSPF neighbor. The if_name is the interface used to communicate with the neighbor. If the OSPF neighbor is not on the same network as any of the directly-connected interfaces, you must specify the interface. c. If not already configured, define the networks and associated area ID for the interface facing the OSPF neighbor by entering the following command: hostname(config-router)# network addr mask area area_id The addr mask pair must cover the IP address of the interface. Configure the interface through which the FWSM communicates with the neighbor by entering the following commands: hostname(config)# interface vlan hostname(config-if)# ospf network point-to-point non-broadcast The following example shows how to configure OSPF across a point-to-point, non-broadcast network. The OSPF neighbor is not on a directly-connected network, so a static route is needed. hostname(config)# route ospf_outside 10.3.3.0 255.255.255.0 10.1.1.99 1 hostname(config)# interface Vlan55 hostname(config-if)# nameif outside hostname(config-if)# security-level 0 hostname(config-if)# ip address 10.1.1.1 255.255.255.0 standby 10.1.1.2 hostname(config-if)# ospf network point-to-point non-broadcast 8-16 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM OL-20748-01