Configure OSPF

Learn how to configure the OSPF protocol on your MX204, MX301, MX304, MX10004, or MX10008 router.

Configuring OSPF on a Juniper MX204, MX301, MX304, MX10004, or MX10008 router involves defining the area, assigning interfaces to that area, and enabling the protocol under the [edit protocols ospf]hierarchy. Core commands include set protocols ospf area <area-id> interface <interface-name> and commit to apply changes.

Before you begin:

• Configure the device interfaces. See the Junos OS Network Interfaces Library for Routing Devices.

• Configure the router identifiers for the devices in your OSPF network. See Example: Configuring an OSPF Router Identifier.

• Control OSPF designated router election. See Example: Controlling OSPF Designated Router Election

To configure OSPF on a Juniper MX router (Junos OS), perform the following steps:

1. Navigate to the configuration mode and set up the OSPF area and interfaces:

   Set passive interface if you want to advertise a network without forming adjacencies set protocols ospf area 0.0.0.0 interface lo0.0 passive.

2. Enable P2P mode on an ethernet port with only two routers on a segment:

3. Manually configure a unique Router ID:

4. If using high-speed links (10G+), adjust the reference bandwidth to ensure accurate cost calculations:

5. Commit the configuration:

6. Verify the configuration:

For more information on configuring the OSPF Routing protocol in Junos OS, see Configuring OSPF Routing Policy.