From: kasturi cisco (kasturi_cisco@hotmail.com)
Date: Mon May 12 2003 - 17:13:32 GMT-3
Marc,
I was going thru ur configs summary that u gave and "yes" what u are
doing is right and the expected behaviour. I just went back and re-read
the related topics such that i fully understand it.
I went you to read the doc pertaining to it (better than my
explaining).Please read the last para of this white paper under "Default
routes in NSSA".
http://www.cisco.com/en/US/tech/tk826/tk365/technologies_tech_note09186a0080094a88.shtml
Hope that helps. Thanks ! in a way i revised something i had learnt long
back.
Good Luck,[IMAGE]
Kasturi.
>From: "Marc" >To: "Ccielab (E-mail)" , "'kasturi cisco'" >Subject: RE:
originate vs originate always >Date: Tue, 13 May 2003 00:46:23 +0900 >
>Thanks Kasturi, I think I undertand the general concept with and without
the >always keyword. A simple scenario I was working earlier though
seemed >backwards. > >nssa client >default route shows up in route-table
>nssa external type 7, 0.0.0.0 > >nssa abr/asbr >area x nssa default-i-o
(no always keyword) > >Even when the asbr/abr DID NOT have the default
route and d-i-o without the >always keyword, the nssa far router had a
default route show up in route >table. I thought someone might know off
the top of their head an >explanation. Maybe I'll lab it up again and
send configs. Probably made a >mistake. Thanks, Marc. > -----Original
Message----- > From: kasturi cisco [mailto:kasturi_cisco@hotmail.com] >
Sent: Monday, May 12, 2003 11:42 PM > To: tan@dia.janis.or.jp > Subject:
Re: originate vs originate always > > > Marc, > > Let us asssume the
toplogy: R1------R2--------R3-------cloud > All of them in area 0 for
ease. > > R3 is generating the default to cloud using : ip route 0.0.0.0
0.0.0.0 >x.x.x.x. Now to generate the default route into OSPF u have to
use >"default-inf-org" cmd on R3 such that R2 and R1 get it. > > When u
use just "default-inf-org" on R3 it will generate the default if it >has
one itself (like above). > When u use just "default-inf-org always" on R3
it will generate the >default even if does not have it. This can lead to
blackholing in case R2/R1 >send traffic to R3 which does not have the
default itself. > > Hope that helps. > > Good Luck, > Kasturi. > > >From:
"Marc" > >Reply-To: "Marc" > >To: "Ccielab (E-mail)" > >Subject:
originate vs originate always > >Date: Sun, 11 May 2003 16:32:38 +0900 >
> > >On an asbr/abr and with virtual link, I am trying to figure out why
I >don't > >get expected behaivor of default-i-o towards an nssa area. >
> > >I had thought that > >-with no previous learned default, must use
"always" keyword > >-with previous learned default, do not need "always"
keyword. > > > >But I find without a previous learned default, the
default gets sent >anyway > >without the "always" keyword. Can someone
explain if there is some other > >parameter involved with d-i-o besides
just having the default already > >learned through other means? > > >
>Thanks > >
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