ospf stub & NSSA

From: Uyota Oyearone (spycharlies@gmail.com)
Date: Tue May 13 2008 - 02:19:20 ART

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Hi guys,

I am not 100% comfortable distinguishing btw. when to use nssa or stub

Assuming R1 connection to the rest of the ospf domain is through R3. Since
R1 does not need specific routing information to the rest of the network, it
just needs to receive only a default route.

***

These two solutions seems to be doing the same thing for me

***

*Solution 1*

R3#

router ospf 1

area 5 nssa no-summary

R1#

area 5 nssa.

*Sol.2*

R3#

area 5 stub no-summary

R1#

area 5 stub

***

My question is when can you categorically use nssa over stub, or vice-versa?

Thanks

Uyota

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