From: Emir trhulj (skimad@gmail.com)
Date: Tue Jun 27 2006 - 00:23:56 ART
This discussion led me to think about this a little.Here is bit more info on
this topic I found.
-
Bit P - This bit is used to tell the NSSA ABR whether to translate
type 7 into type 5.
-
No Type 7/5 translation means bit P = 0.
-
Type 7/5 translation means bit P = 1.
-
If bit P = 0, then the NSSA ABR must not translate this LSA into Type
5. This happens when NSSA ASBR is also an NSSA ABR.
-
If bit P = 1, then the NSSA ABR (if there are multiple NSSA ABRs, the
one with highest router ID) must translate this type 7 LSA into a type 5
LSA."
On 6/27/06, Petr Lapukhov <petr@internetworkexpert.com> wrote:
>
> Absolutely correct.
>
> AFAIK Cisco IOS offers no way of "manual" P-bit clearing, it's always set.
>
> Two known wokrarounds for this issue are "summary..not-advertise"
> and "area x nssa no-redistribution". Basically, result is the same,
> as with P-bit reset, so it's merely a theoretical qurestion... ;)
>
> HTH
> --
> Petr Lapukhov, CCIE #16379
> petr@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Outside US: 775-826-4344
>
> 2006/6/26, Narbik Kocharians <narbikk@gmail.com>:
> >
> > The summary-address command does NOT stop the router from converting the
> > type 7 to type 5, it stops the router from advertising them.
> >
> > Narbik Kockarians
> > CCIE# 12410 (R&S, SP, Security)
> > CCSI# 30832
> > Network Learning, Inc. (CCIE class Instructor)
> > www.ccbootcamp.com (CCIE Training)
> >
> >
> >
> > On 6/25/06, Petr Lapukhov <petr@internetworkexpert.com> wrote:
> > >
> > > Arun,
> > >
> > > use "summary-address x.x.x.x y.y.y.y not-advertise" at *ABR* to
> > > prevent 7->5 conversion.
> > >
> > > 2006/6/25, Arun Arumuganainar <aarumuga@hotmail.com>:
> > > >
> > > > Hi ,
> > > >
> > > > Is there any way by which we can disable type 7 to type5 conversion.
> > > >
> > > > Thanks and Regards
> > > > Arun
> > > >
> > > >
> > _______________________________________________________________________
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> > >
> > >
> > >
> > > --
> > > Petr Lapukhov, CCIE #16379
> > > petr@internetworkexpert.com
> > >
> > > Internetwork Expert, Inc.
> > > http://www.InternetworkExpert.com
> > > Toll Free: 877-224-8987
> > > Outside US: 775-826-4344
> > >
> > >
> _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
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