From: Jason1 (jason1@xxxxxxxxxx)
Date: Thu Jun 07 2001 - 07:39:45 GMT-3
Chuck,
I'm aware that NSSA is a type of area, but in looking through the RFC1587,
it never refer to the NSSA as a stub area or a type of stub area.It refer to
NSSA as a new type of area, which I agree with, I'm just in disagreement
with the idea that NSSA is a type of stub area simply because it doesn't
meet the requirement of a stub area in the first place.
Forgive me if this question sounds dumb because I'm trying to question
something that I assume has been accepted by most people... So far all the
comments/replies I've received cliams that NSSA is a type of stub area and
all refer me back to RFC1587. So either I'm not reading it right, or else
everybody is reading it wrongly.
In fact, I quote the following from the RFC which seems to implied that NSSA
is NOT a stub area.
----------
It should also be noted that unlike stub areas, all OSPF summary
routes (type-3 LSAs) must be imported into NSSAs. This is to ensure
that OSPF internal routes are always chosen over OSPF external
(type-7) routes.
----------
If anybody could give me a definite answer, it would be greatly
appreciated...
Jason Wong
----- Original Message -----
From: "Chuck Larrieu" <chuck@cl.cncdsl.com>
To: "Jason1" <jason1@v-labs.net>; <ccielab@groupstudy.com>
Sent: Wednesday, June 06, 2001 9:08 PM
Subject: RE: Is NSSA a type of stub area or is it not ?
> Yes. :->
>
> Refer to RFC 1587 ftp://ftp.isi.edu/in-notes/rfc1587.txt
>
> "Abstract
>
> "This document describes a new optional type of OSPF area, somewhat
> humorously referred to as a "not-so-stubby" area (or NSSA). NSSAs are
> similar to the existing OSPF stub area configuration option but have the
> additional capability of importing AS external routes in a limited
fashion.
> "
>
> "Proposed Solution
>
> "This document describes a new optional type of OSPF area, somewhat
> humorously referred to as a "not-so-stubby" area (or NSSA) which has the
> capability of importing external routes in a limited fashion. "
>
> The NSSA was developed to solve particular problems caused by limitations
of
> the original OSPF specification, to whit, the importation of external
routes
> into what otherwise was considered an OSPF stub area.
>
> You may want to add the IETF link to your references.
>
> HTH
>
> Chuck
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Jason1
> Sent: Wednesday, June 06, 2001 5:19 AM
> To: ccielab@groupstudy.com
> Subject: Is NSSA a type of stub area or is it not ?
>
> Is NSSA a type of stub area or is it not ? :-)
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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