[c-nsp] ISIS partition avoidance

[Ibrahim Abo Zaid]

Hi All


Does any one knows why ISIS partition avoidance is needed ? according to
DocCD

To cause an Intermediate System-to-Intermediate System (IS-IS) Level 1-2
border router to stop advertising the Level 1 area prefix into the Level 2
backbone when full connectivity is lost between the border router, all
adjacent Level 1 routers, and end hosts


but that occur automatically without enabling the feature so what extra
benefit it provide ?

best regards
--Ibrahim