From: Tim Fletcher (tim@fletchmail.net)
Date: Mon May 12 2003 - 18:28:11 GMT-3
Kasturi,
That's true, and it will also advertise the default if it is both an ASBR
and ABR, regardless if it has a default.
-Tim Fletcher #11406
At 08:19 PM 5/12/2003 +0000, kasturi cisco wrote:
>Tim,
>
> From what i understand, the "area x nssa defa-info orig" generates
> default route based on following condition:
>
>If NSSA ASBR: will generate the default only if it has one itself.
>If NSSA ABR : will generate default route irrespective of it having it.
>
>Good Luck,1bb5379.jpg
>Kasturi.
> >From: Tim Fletcher
> >To: Marc , "Ccielab (E-mail)" , 'kasturi cisco'
> >Subject: RE: originate vs originate always
> >Date: Mon, 12 May 2003 16:05:22 -0400
> >
> >rtr(config-router)#area 1 nssa default-information-originate ?
> > no-summary Do not send summary LSA into NSSA
> >
> >
> >rtr(config-router)#area 1 nssa default-information-originate
> >
> >The "always" keyword only applies the the "default-information
> >originate" command, not the "area x nssa
> >default-information-originate" command. The "area x nssa
> >default-information-originate" will always generate a default route
> >into the nssa area, whether you have a default or not.
> >
> >HTH
> >
> >-Tim Fletcher #11406
> >
> >At 12:46 AM 5/13/2003 +0900, Marc wrote:
> >>Thanks Kasturi, I think I undertand the general concept with and
> >>without the
> >>always keyword. A simple scenario I was working earlier though
> >>seemed
> >>backwards.
> >>
> >>nssa client
> >>default route shows up in route-table
> >>nssa external type 7, 0.0.0.0
> >>
> >>nssa abr/asbr
> >>area x nssa default-i-o (no always keyword)
> >>
> >>Even when the asbr/abr DID NOT have the default route and d-i-o
> >>without the
> >>always keyword, the nssa far router had a default route show up in
> >>route
> >>table. I thought someone might know off the top of their head an
> >>explanation. Maybe I'll lab it up again and send configs. Probably
> >>made a
> >>mistake. Thanks, Marc.
> >> -----Original Message-----
> >> From: kasturi cisco [mailto:kasturi_cisco@hotmail.com]
> >> Sent: Monday, May 12, 2003 11:42 PM
> >> To: tan@dia.janis.or.jp
> >> Subject: Re: originate vs originate always
> >>
> >>
> >> Marc,
> >>
> >> Let us asssume the toplogy: R1------R2--------R3-------cloud
> >> All of them in area 0 for ease.
> >>
> >> R3 is generating the default to cloud using : ip route 0.0.0.0
> >>0.0.0.0
> >>x.x.x.x. Now to generate the default route into OSPF u have to use
> >>"default-inf-org" cmd on R3 such that R2 and R1 get it.
> >>
> >> When u use just "default-inf-org" on R3 it will generate the
> >>default if it
> >>has one itself (like above).
> >> When u use just "default-inf-org always" on R3 it will generate
> >>the
> >>default even if does not have it. This can lead to blackholing in
> >>case R2/R1
> >>send traffic to R3 which does not have the default itself.
> >>
> >> Hope that helps.
> >>
> >> Good Luck,
> >> Kasturi.
> >>
> >> >From: "Marc"
> >> >Reply-To: "Marc"
> >> >To: "Ccielab (E-mail)"
> >> >Subject: originate vs originate always
> >> >Date: Sun, 11 May 2003 16:32:38 +0900
> >> >
> >> >On an asbr/abr and with virtual link, I am trying to figure out
> >>why I
> >>don't
> >> >get expected behaivor of default-i-o towards an nssa area.
> >> >
> >> >I had thought that
> >> >-with no previous learned default, must use "always" keyword
> >> >-with previous learned default, do not need "always" keyword.
> >> >
> >> >But I find without a previous learned default, the default gets
> >>sent
> >>anyway
> >> >without the "always" keyword. Can someone explain if there is
> >>some other
> >> >parameter involved with d-i-o besides just having the default
> >>already
> >> >learned through other means?
> >> >
> >> >Thanks
> >>
> >>
> >>------------------------------------------------------------------------
> ----
> >>--
> >> Mega movies. Mega prizes. Switch to Hallmark channel.
> >
>
>
>----------
>Attention Taureans! See what's in store.
><http://g.msn.com/8HMFENIN/2743??PS=>Read on.
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