From: Peter van Oene (pvo@usermail.com)
Date: Sat Feb 14 2004 - 12:13:50 GMT-3
At 10:02 PM 2/12/2004, Winston V. Shaw wrote:
>Rx cannot be an ABR if you have "other routing protocols" attached to it.
>If you take away the "other routing protoscols" then you can configure it
>with area x nssa and put the area x nssa default-information-originate on
>the cat3550 if it is connected to other protocols. And so on, and so on.....
>I think NSSA was created to allow redistribution into a so-called "stub"
>area and the ospf domain and still keep the database as small as possible.
Rx can certainly be both an ASBR and ABR. Indeed, this is an interesting
setup where many real life questions come into play. A couple include,
should the default be type 3 or type 7 into the NSSA area. Should
externals be leaked into the backbone AND the stub area, or one or the other?
NSSA was certainly created to allow injecting of externals into area types
that previously precluded the flow of externals. The latest NSSA rfc is
3101 which covers both SP and Enterprise motivations, which are largely
similar.
Pete
>WVShaw
>CCIE#7991
> >
> > From: "Paul Chen" <cpjchen@starhub.net.sg>
> > Date: 2004/02/12 Thu PM 09:29:08 EST
> > To: "'Bill Lijewski'" <bill@eccie.com>, <ccielab@groupstudy.com>
> > Subject: RE: NSSA [bcc][faked-from]
> >
> > What about the case that the cat3550 is a ABR and ASBR , Rx is a ABR ?
> >
> > This is what I am seeing in my setup.
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Bill
> > Lijewski
> > Sent: Friday, February 13, 2004 9:53 AM
> > To: 'Paul Chen'; ccielab@groupstudy.com
> > Subject: RE: NSSA [bcc][faked-from]
> >
> >
> > Just like the 'no-summary' command for a Totally Stubby area or a Totally
> > NSSA area, the 'default-information-originate' command should only go
> on the
> > ABR.
> >
> > - Bill Lijewski
> > CCIE#8642
> > Network Learning Inc
> > 5 Day R&S CCIE Bootcamp Instructor
> > bill@eccie.com
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Paul
> > Chen
> > Sent: Friday, February 13, 2004 12:14 AM
> > To: ccielab@groupstudy.com
> > Subject: NSSA [bcc][faked-from]
> > Importance: Low
> >
> > Hi,
> >
> > If it says Rx must have a default route for a NSSA area :
> >
> >
> > cat3550------ a ospf network
> > |
> > |
> > Rx
> > |
> > Other routing protols
> >
> >
> > Do I configure area x nssa default-information originate on both sides or
> > just on Rx ?
> >
> > I did it on both the cat 3550 and Rx . Rx will still have a default route
> > pointing to the Cat3550.
> >
> > Does it matter which side to configure the nssa default-info-originate on ?
> >
> > Any advice appreciated.
> >
> > Paul
> >
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