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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

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Creating an OSPF Process

Creating an OSPF Process


To run OSPF, the router needs to have a router ID. A router ID of the router is a 32-bit unsigned integer, which uniquely identifies the router in an AS. To ensure the stability of OSPF, you need to manually configure a router ID for each device during network planning.


  1. Run system-view

    The system view is displayed.

  2. Run ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] *

    An OSPF process is created, and the OSPF view is displayed.

    • The parameter process-id specifies the ID of an OSPF process. The default value is 1.

      The router supports OSPF multi-process. You can create different processes for different types of service. The OSPF process ID is valid in the local area, without affecting packet exchange with other routers. Therefore, different routers can also exchange packets even though they have different process IDs.

    • The parameter router-id router-id specifies the router ID of the router.

      By default, the system automatically selects an IP address of the interface as the router ID. The largest IP address in loopback addresses is taken as the router ID. If no loopback interface is configured, the largest IP address configured on the interface is selected as the router ID. When manually setting a router ID, ensure that the router ID of each device in an AS is unique. Generally, you can set the router ID to be the same as the IP address of a certain interface on the device.

      The router ID of each OSPF process must be unique on the OSPF network; otherwise, the OSPF neighbor relationship cannot be set up and routing information is incorrect. Configuring a unique router ID for each OSPF process on each OSPF device is recommended to ensure stability.
    • The parameter vpn-instance vpn-instance-name specifies the name of a VPN instance.

      If a VPN instance is specified, the OSPF process belongs to the specified VPN instance. Otherwise, the OSPF process belongs to the public network instances.

Updated: 2019-12-27

Document ID: EDOC1000174069

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