What is the usage of OSPF router-id and the selection principle of the router-id

Latest reply: Mar 24, 2016 13:45:35 950 1 0 0

What is the usage of OSPF router-id and the selection principle of the router-id?

  • x
  • convention:

Osaideo Created Mar 24, 2016 13:45:35 Helpful(0) Helpful(0)

The router ID of each OSPF process is the unique identity on AS. It can be appointed by command, which has a highest priority. The configuration command is as following:
[Router]OSPF 100 router-id 1.1.1.1
If the router-id is not configured by command, the system will select an IP address of interfaces automatically. And the selection order will be: Firstly, select the largest IP address from all Loopback interfaces as the router-id, if there is no loopback interface, then the largest IP address of physic interfaces will be selected as the router-id.
To ensure the stability of router-id, once the router-id has been selected, it will not be changed even when a bigger IP address is configured, OSPF progress is deleted and re-configured, and OSPF progress is reset. Only when the IP address which has been selected as router-id is deleted or this interface is deleted, and OSPF progress is reset change the router-id.
  • x
  • convention:

Reply

Reply
You need to log in to reply to the post Login | Register

Notice: To protect the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but are not limited to the following:
  • Politically sensitive content
  • Content concerning pornography, gambling, and drug abuse
  • Content that may disclose or infringe upon others ' commercial secrets, intellectual properties, including trade marks, copyrights, and patents, and personal privacy
Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see " Privacy."
If the attachment button is not available, update the Adobe Flash Player to the latest version!

Login and enjoy all the member benefits

Login
Fast reply Scroll to top