From: Narbik Kocharians (narbikk@gmail.com)
Date: Fri Dec 29 2006 - 20:33:27 ART
Typically in a NSSA the ABR is the router that can potentially inject a
default route (If the "default-information originate" or the "no-summary"
keyword is added to the area xx nssa), but if the router is not an ABR and
you want the NSSA area to have a default route for all the external
networks, the conventional way may not work, but the 007 configuration can
be used to inject a default route into an NSSA area, lets say R3 is the ABR,
and you want R4 to inject a default route for the external networks, what
you can do is create a loopback interface, let's say Loopback99 and
advertise it in area 0, that will make R4 an ABR as well, now R4 can
configure "area xx nssa default-information originate" which will inject a
default route into the NSSA area.
On 12/29/06, Narbik Kocharians <narbikk@gmail.com> wrote:
>
> Typically in a NSSA the ABR is the router that can potentially inject a
> default route (If the "default-information originate" or the "no-summary"
> keyword is added to the area xx nssa), but if the router is not an ABR and
> you want the NSSA area to have a default route for all the external
> networks, the conventional way may not work, but the 007 configuration can
> be used to inject a default route into an NSSA area, lets say R3 is the ABR,
> and you want R4 to inject a default route for the external networks, what
> you can do is create a loopback interface, let's say Loopback99 and
> advertise it in area 0, that will make R4 an ABR as well, now R4 can
> configure "area xx nssa default-information originate" which will inject a
> default route into the NSSA area.
>
>
> On 12/29/06, ccie anees <ccieanees@yahoo.com> wrote:
> >
> > Hi Ali,
> >
> > One more important point here is,
> >
> > you can not redistribute static default route in OSPF. (ip route
> > 0.0.0.0 0.0.0.0 )
> > And also when you redistribute eigrp or rip which generates default
> > route, it will not redistributed into OSPF.
> >
> > Please read the Cisco tech support documents
> > http://www.cisco.com/en/US/tech/tk365/tech_configuration_examples_list.html#anchor6
> >
> >
> > Thanks,
> >
> > Anees.
> >
> > *Ali Sheeraz Mehdi <ali.mehdi@atosorigin-me.com >* wrote:
> >
> > I already have an ASBR and have to originate a default route in my
> > scenario and ABR is not ASBR here. I have tried default-information
> > originate always on ASBR but it is not working as well. I have also tried ip
> > route 0.0.0.0/0 and redistribute static even then it is not generating a
> > default route.
> >
> > Regards
> > Ali
> >
> > ------------------------------
> > *From:* Narbik Kocharians [mailto: narbikk@gmail.com]
> > *Sent:* Friday, December 29, 2006 8:41 PM
> > *To:* ali.mehdi@atosorigin-me.com
> > *Cc:* ccie anees; nagendra kumar; ccielab@groupstudy.com
> > *Subject: *Re: NSSA - default-information-originate
> >
> > If the ASBR is also the ABR you could do "area xx nssa
> > default-information" but if it is not, then when a router injects a default
> > route its considered to be an ASBR.
> > On 12/29/06, *Ali Sheeraz Mehdi* < ali.mehdi@atosorigin-me.com> wrote:
> > Should I use default-information originate always or area X nssa
> > default-information originate; which one should work?
> >
> > Regards
> >
> > ------------------------------
> > *From:* Narbik Kocharians [mailto: narbikk@gmail.com]
> > *Sent:* Friday, December 29, 2006 8:32 PM
> > *To:* Ali Sheeraz Mehdi
> > *Cc:* ccie anees; nagendra kumar; ccielab@groupstudy.com
> >
> > *Subject:* Re: NSSA - default-information-originate
> >
> > Well the ASBR can also be the ABR, but if it is not, try
> > default-information that will work.
> > On 12/29/06, *Ali Sheeraz Mehdi* < ali.mehdi@atosorigin-me.com> wrote:
> > Anees,
> >
> >
> >
> > This is exactly what I have experienced in my lab. ASBR is not
> > generating
> > any default route.
> >
> >
> >
> > Any comments
> >
> >
> >
> > Regards
> >
> > Ali
> >
> >
> >
> > _____
> >
> > From: ccie anees [mailto:ccieanees@yahoo.com]
> > Sent: Friday, December 29, 2006 8:08 PM
> > To: nagendra kumar; Ali Sheeraz Mehdi; ccielab@groupstudy.com
> > Subject: Re: NSSA - default-information-originate
> >
> >
> >
> > Hi,
> >
> >
> >
> > I don't think ASBR in NSSA can generate Default route. the only command
> > applicable in the Intra area routers or ASBR in NSSA are area X nssa.
> >
> > All the area X nssa <options> are applicable in ABR NSSA router or ABR
> > and
> > ASBR NSSA router.
> >
> >
> >
> > This is what I see in the lab practice. Please correct me if I am wrong.
> >
> >
> >
> >
> > Thanks,
> >
> >
> >
> > Anees.
> >
> >
> >
> >
> >
> > a kumar < nagendranainar@yahoo.co.in> wrote:
> >
> > HI Ali,
> > Yes. You can configure ASBR in NSSA to generate default route. You have
> > to
> > confiure the ABR as "area nssa" and in ASBR configure "area nssa
> > default-information-originate". By this you will get Inter-area routes
> > from
> > ABR into this NSSA area and a default router from ASBR.
> >
> > To suppress N2 within NSSA, you need to configure "area 2 nssa
> > no-redistribute default-information-originate" in ASBR.
> >
> > Regards,
> > Nagendra
> >
> > Ali Sheeraz Mehdi wrote: Hi Guys,
> >
> >
> >
> > Can ASBR in NSSA generate a default route (if ABR and ASBR are not the
> > same
> > routers); also can we suppress N2 routes within NSSA maintaining the
> > full
> > reachability?
> >
> >
> >
> >
> >
> > Regards
> >
> > Ali
> >
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> >
> >
> > --
> > Narbik Kocharians
> > CCIE# 12410 (R&S, SP, Security)
> > CCSI# 30832
> > Network Learning, Inc. (CCIE class Instructor)
> > www.ccbootcamp.com (CCIE Training)
> >
> >
> >
> > --
> > Narbik Kocharians
> > CCIE# 12410 (R&S, SP, Security)
> > CCSI# 30832
> > Network Learning, Inc. (CCIE class Instructor)
> > www.ccbootcamp.com (CCIE Training)
> >
> >
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>
>
> --
> Narbik Kocharians
> CCIE# 12410 (R&S, SP, Security)
> CCSI# 30832
> Network Learning, Inc. (CCIE class Instructor)
> www.ccbootcamp.com (CCIE Training)
>
-- Narbik Kocharians CCIE# 12410 (R&S, SP, Security) CCSI# 30832 Network Learning, Inc. (CCIE class Instructor) www.ccbootcamp.com (CCIE Training)
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