From: Anthony Pace (anthonypace@xxxxxxxxxxx)
Date: Tue Jul 23 2002 - 16:57:17 GMT-3
Is this correct: If you had an ASBR which was an ABR and used NSSA with
"no-redistribute" you would stop the LSA-7 routes from being pushed
into downstraem routers of the NSSA but the LSA-7 routes would go into
Area-0 and change into LSA-5 and the NSSA could still get the "LSA-3
0.0.0.0" via this ABR if the "no-summary" was used?
OR are you saying that "no-redistribution" simply keeps the LSA-7
routes from going into area 0, thereby isolating them to the NSSA? (in
which case I understood it backwards)
Anthony Pace
On Mon, 22 Jul 2002 13:00:50 -0700, "ccie candidate" <ccie1@lycos.com>
said:
> ok ;
> the NSSA is similar to stub area , where only LSA3 (inter-area ) can
> propagate inside the area , No LSA4 $ 5 is allowed.
> teh diffrenece is that when you have another routing protocol
> redistributing into the ospf domain ( something like rip or redist
> static ) and the redistributio point is one of the down stream routers
> of the NSSA , then an LSA7 will also propagate inside the area , when
> it reaches the ABR (which is propably connected to area 0) it gets
> converted into LSA5 and propagate inside the domain .
>
> here are some tips .
> 1-NSSA is does not propagate default route back to the down steam
> routes unless you add NO-Summary option
> area 30 nssa no-summary
>
> 2-when you have the ABR is also ASBR , you have another two options for
> that command
>
> no-redistribution , will not allow the router to convert lsa7 to lsa5
>
> default-orginate , will propagate a default when the no-summary is not
> used .
>
> hope this helps
>
>
>
> --
>
> On Mon, 22 Jul 2002 11:28:21
> Khurram Khani wrote:
> >Look for scenario when NSSA ABR is also ASBR. It generates both Type 5 and
> >Type 7 LSAs.
> >
> >Thanks
> >Khurram
> >----- Original Message -----
> >From: "Louis Young" <tonyblair@etang.com>
> >To: <ccielab@groupstudy.com>
> >Sent: Monday, July 22, 2002 2:25 AM
> >Subject: Any tips when doing OSPF NSSA stuff?
> >
> >
> >> Hi all ,I was bewildered by some senarios about OSPF NSSA stuff,anyone can
> >offer some general tips?
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