From: ccie candidate (ccie1@xxxxxxxxx)
Date: Mon Jul 22 2002 - 17:00:50 GMT-3
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 in
to the ospf domain ( something like rip or redist static ) and the redistributi
o 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 connecte
d 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 co
mmand
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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