Thank you for your reply. May I ask you one more question? Do the timer change in different type interface? or the timer do not change? If the timer do not change, why a point-to-point interface can not form neighbor with a multipoint interface? Thank You!
Two different types of Hello are used in ISIS, Point to Point Hello's and LAN (or Broadcast) Hello's (and the LAN Hello's are subdivided into two more types- Level-1 and Level-2).
Neighbors are requires to use the same type of Hello's. A Multipoint interface will use a LAN (or Broadcast) Hello and a Point to Point interface will use a Point to Point Hello, in this case no neighbor relashonship will be formed as there is a Hello type mismatch.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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