# OSPF Graceful Restart

**URL:** <https://forum.networklessons.com/t/ospf-graceful-restart/2109>\
**Category:** Lessons Discussion\
**Created:** [August 30, 2017, 1:41pm UTC](https://forum.networklessons.com/t/ospf-graceful-restart/2109 "2017-08-30T13:41:00Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![saif.salah.apple](https://cdn-forum.networklessons.com/letter_avatar_proxy/v4/letter/s/71c47a/32.png) [@saif.salah.apple](https://forum.networklessons.com/u/saif.salah.apple)\
**Post date:** [January 4, 2019, 7:59pm UTC](https://forum.networklessons.com/t/ospf-graceful-restart/2109/4 "2019-01-04T19:59:58Z")

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Dear Agapides,  
kindly,

1. i have confuse about sentecnce “Once OSPF has restarted, it will re-establish neighbor adjacencies with the helper routers” it contradict ( sorry if wrong with using word I am not native), with concept of gracefull restart that neighbor adjacency is not down during ospf process restart..  
2.usually i clear ospf process when i make change in LSDB using filtering or summerization or any thing else change LSDB ,so you mentioned if thers is changed in LSDB before & after gracefull restart , it terminate gracefull restart ( mean neighbor reset ) & interupt in network happen ,so how can compromise between two concept .need your nice clearification

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