In ISIS Protocol, how to elect the DIS?

Created Mar 28, 2016 00:09:38Latest reply Mar 28, 2016 15:48:44 1040 1 0 0

In ISIS Protocol, how to elect the DIS?

  • x
  • convention:

Ravger     Created Mar 28, 2016 15:48:44 Helpful(0) Helpful(0)

In ISIS, the DIS election is carried out automatically. It is based on the interface priority of the same network. If there are more than one interfaces with the highest priority, then the maximum MAC address from those interfaces with same priority will be elected . DIS is elected in the IS based on the neighbor information of the  interface. Neighbor information is consistent throughout the network, so the the respective election results are the same.
Only broadcast network type will elect DIS. It's no need to elect DIS in the Point-to-Point network type.
Different levels have different levels of DIS.
Backup DIS doesn’t exist in ISIS. When the DIS does not work, another DIS will be elected directly.
Interval of Hello packets sent by the DIS is 1/3 the interval of the ordinary router, so it's easy for the other router to rapidly detect DIS failure and quickly elect a new DIS.
DIS router is not permanent, once the priority of a new router in the network is higher than the priority of the current DIS, or the current DIS does not work, the network will re-elect the new DIS. So the stability of the network is poor .
  • x
  • convention:

Responses

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

Notice:To ensure 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 not limited to politically sensitive content, content concerning pornography, gambling, drug abuse and trafficking, content that may disclose or infringe upon others' intellectual properties, including commercial secrets, 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 Policy.”
If the attachment button is not available, update the Adobe Flash Player to the latest version!
Fast reply Scroll to top