How do you do loopback in OSPF?

How do you do loopback in OSPF?

Enabling OSPF on a Loopback Interface

1. Create the loopback interface (3 in the example). (host) (config) #interface loopback 3.
2. Configure an IP address and Mask for the loopback.
3. Attach the ospf-profile “techpubs” to the loopback interface.
4. Verify the loopback configuration:
5. Verify the interface configuration:

How configure OSPF in Cisco ASA?

Complete these steps in order to configure OSPF in the Cisco ASA:

1. Log in to the Cisco ASA with ASDM.
2. Navigate to the Configuration > Device Setup > Routing > OSPF area of the ASDM interface, as shown in this image.
3. Enable the OSPF routing process on the Setup > Process Instances tab, as shown in this image.

Which two commands are required for basic OSPF configuration?

14. Which two commands are required for basic OSPF configuration? Explanation: The “Router ospf [process-id]” command enables OSPF routing protocol in the router and the “[Wildcard-mask] area [area-id]” command is used to select the interfaces that we want to include in the OSPF process.

Is the OSPF network point to point on loopback?

As Martin explained so nicely you can tell OSPF that it is not a loopback and it is a point-to-point network type, and OSPF says “OK I am going to advertise the interface with its correct mask”.

Which is the highest IP address for OSPF?

If you have loopback interfaces, the RID of the router is the highest IP address of these. If you have no loopback interfaces, then it takes the IP address of the highest “no shut” interface. If all of your interfaces are shut down, then the OSPF process doesn’t start ‘cos it can’t get an RID.

How to show OSPF interface on a router?

This is the output of the show ip ospf interface serial 0 command on Router1. This output shows the OSPF network type for interface Serial0 as point-to-point. Similarly, this example displays the output for the show ip ospf neighbor and the show ip ospf interface commands on Router2.

Do you need a host addresz on the loopback interface?

In most cases, you do not need more than a host addresz on the loopback interface. Note that the default ospf network type for the loopback interface is “loopback”, which causes this behavior. This is why you need to use “ip ospf network point-to-point” to change the default behavior.