High availability

[Ratheesh mv]

Dear Team ,

I am bit confuse on NSF and graceful restart.

Are NSF and graceful restart same feature in OSPF point  or these are separate features ?  

Could anyone help me to clear this point ?

Is there any good study material bout it ?

[Georg Pauwen]

Hello,

As far as I recall, NSF is essentially the same as graceful restart. The RFC calls it Graceful Restart (GR), Cisco calls it Non Stop Forwarding (NSF).

Have a look at the link below:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ha/configuration/15-sy/ha-15-sy-book/ha-cfg-nsf-ospf.html

[Joseph W. Doherty]

https://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/high-availability/solution_overview_c22-487228.html