From: Ash (nester2k@gmail.com)
Date: Mon Sep 24 2007 - 05:01:37 ART
Han,
Not all 5's will get converted into type 7, Only the ones being
redistributed into OSPF on the NSSA ASBR directly will propagate as type 7
in NSSA area and type 5 in any non stub areas. But if this isn't the only
ASBR in the topology and through the virtue of another ASBR your NSSA ASBR
is learning some more Type 5 lsa's. Those ones will be filtered since NSSA
filters type 5's.
best,
On 9/23/07, Han Solo <hansolo@ccieunix.com> wrote:
>
>
> Thanks Ash , thats what I figured. Yes R5 is an ASBR connected to backbone
> area 0 and , nssa area 10 , R5 is only ASBR , it is running rip and ospf.
> I redist rip into ospf , and on R5 issueing a "show ip ospf database" I
> see all the External Type 5's , which should be converted and sent to area
> 10 nssa internal routers , this was not occuring , I rebooted it and there
> it went , I just wasnt sure of the following fact.
>
> 1) If I issue a "show ip ospf database" on a ospf asbr which happens to be
> an asbr for a nssa area , I thought that all the type 5's I see on this
> asbr should be converted into type 7's and sent to nssa internal routers
> and show up as type 7's.
>
>
> tia
>
>
> On Sun, 23 Sep 2007, Ash wrote:
>
> > NSSA doesn't allow type 5's to be propagated into the area. Question i
> have
> > is, is your R5 OSPF NSSA router an ABR or truly an ASBR?. If its an ASBR
> > meaning you have done some sort of redistribution into OSPF on R5, then
> > those redistributed routes will show as type 5 in non nssa and type 7 in
> > NSSA area provided you haven't manually defined "no redistribution" on
> the
> > NSSA area.
> >
> > On the other hand, if your R5 is just an NSSA ABR between two OSPF areas
> and
> > the Acual ASBR is another router, then what you're seeing is expected.
> >
> >
> > On 9/23/07, Han Solo <hansolo@ccieunix.com> wrote:
> >>
> >> So at this point I guess I am asking myself is if I got to an ospf NSSA
> >> ASBR and issue the command " show ip ospf database " and I see 20
> Extenal
> >> Type 5 LSA's , what would stop this router from converting them into
> OSPF
> >> type 7 and sending them into the nssa area ?
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Sun, 23 Sep 2007, Han Solo wrote:
> >>
> >>> Check my sanity please. If R5 is an ospf ASBR and has Area 10
> connected
> >> as an
> >>> NSSA , and R4 is an area 10 NSSA internal router. Should R4 see all of
> >> R5
> >>> External Type 5 LSA's as N2 ? If I do a "show ip ospf database" on R5
> >> the
> >>> NSSA only ASBR , I see like 12 Ext Type 5 Prefixes. Should this R5 not
> >>> convert them to Type 7 and pass them to R4 and I should see them as
> Type
> >> 7 N2
> >>> on the Internal R4 router.
> >>>
> >>> tia
> >>>
> >>>
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