That's not what it said in
Below is from the web page's Filtering in NSSA
"There are situations where there is no need to inject
external routes into the NSSA as type 7. This
situation usually occurs when an ASBR is
also an NSSA ABR. When redistribution takes place in
this scenario, the router generates type 5 as well as
type 7 LSAs. You can prevent the
router from creating type 7 LSAs for NSSA using the
router ospf 1
area 1 nssa no-redistribution
In the network diagram above, area 1 is configured
using the no-redistribution option. This means that
all IGRP routes are redistributed into
area 0, but no type 7 LSAs are generated for area 1.
Only configure this command on an NSSA ASBR that's
also an ABR."
--- "Volkov, Dmitry (Toronto - BCE)"
> > Jaspreet
"no-redistribution" will not sent lsa 5 into nssa.
ABR/ASBR will sent only lsa 5 to area 0.
From: ying c [mailto:bf5tgh1@xxxxxxxxx]
Sent: Sunday, August 04, 2002 10:59 PM
To: Jaspreet Bhatia; ccielab@xxxxxxxxxxxxxx
Subject: Re: NSSA Type 7 to Type 5 question
See this page:
'not-advertise' means do not advertise type 7
of the NSSA. i.e. type 7 LSA stays in the NSSA area
and not to leak out to the rest of OSPF areas.
There's another option 'no-redistribution' which
apply to a router that happens to be an NSSA ABR and
NSSA ASBR, by default this router will generate both
type 5 and type 7 LSAs into NSSA, this option will
save a little bit bandwidth and only send type 5
--- Jaspreet Bhatia <jasbhati@xxxxxxxxx> wrote:
> Hello Folks,
> When we get type 7
> converted into Type 5
> LSAs at the NSSA ABR . there is an option to
> which type 7 LSA does
> not get converted into a type 5 LSA .
> summary-address prefix mask not-advertise
> I did not understand the working of this command .
> Can anyone throw some
> light on it ?