From: Sandro Ciffali (sandyccie@xxxxxxxxx)
Date: Wed Aug 01 2001 - 23:47:45 GMT-3
Try this out
R3------neta----R1----netb----R2
neta 172.16.13.0/24, netb 172.16.4.0/22
On R3 creat a loop back with ip address
172.16.12.1/24, Keep this loopback on a seperate area
let us sayy 20, On R3 configure area 20 range
172.16.12.0 255.255.252.0
Now R1 will have two routes, 172.16.13.0/24 as
directly connected and 172.16.12.0/22 as O IA, This
route should get redistributed into rip.
Sandro
--- Hans <yyao@sympatico.ca> wrote:
> Hi Frank and all,
>
> Following is my scenario:
>
> --neta---R1---netb--R2
>
> Where neta is in ospf and netb is in rip.
>
> neta=172.16.13.0/24, netb=172.16.4.0/22
>
> I did "summary-address 172.16.12.0 255.255.252.0" on
> R1. After doing that I checked the routing table on
> R1 and see:
>
> O 172.16.12.0/22 is a summary, 01:05:11, Null0
>
> On R1, I redistribute ospf routes into rip, but on
> R2, I can not see 172.16.12.0/22.
>
> But if I put a static routes on R1:
>
> ip route 172.16.12.0 255.255.252.0 null0 and
> redistribute this static route into rip, I can see
> 172.16.12.0/22.
>
> I agree with you on the point that an ospf route:
> 172.16.12.0/22 should be able to beredistributed in
> to rip and on R2 I should be able to see
> 172.16.12.0/22, but I can not.
>
> Any clues?
>
> Hans
>
>
> > From: "Frank B" <buffingf@hawaii.rr.com>
> > Date: 2001/07/31 Tue AM 04:57:55 EDT
> > To: "Hans" <yyao@sympatico.ca>
> > CC: <ccielab@groupstudy.com>
> > Subject: RE: ospf rip redistribution
> >
> > Hans,
> > If the router you configured with "summary
> address 172.16.12.0
> > 255.255.252.0" is an ASBR and you redistribute
> ospf into the rip process on
> > that same router, then this route will pass into
> rip as long as the
> > interface has the same mask (assuming it also is
> within the 172.16.0.0 major
> > network) Also note that "redistribute connected"
> isn't required.
> >
> > The reason...this is the normal behavior when
> redistributing
> > classless<-->classfull routing protocols. Your
> email below shows it's an
> > ospf route in the routing table, so if it's within
> the same major network
> > and has the same mask as the interface in the rip
> domain it will
> > redistribute.
> >
> > O 172.16.12.0/22 is a summary, 01:05:11,
> Null0
> >
> >
> > I believe your statement "I think the only way of
> summarizing ospf route on
> > an ASBR is to use static route pointing to null0."
> is not true. I hope you
> > understand why...Frank
> >
> > Please read this:
> http://www.cisco.com/warp/public/105/54.html
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com]On Behalf Of
> > Hans
> > Sent: Monday, July 30, 2001 7:08 PM
> > To: Jay Chandradas; ccielab@groupstudy.com
> > Subject: Re: ospf rip redistribution
> >
> >
> > Hi All,
> >
> > I can use "summary address 172.16.12.0
> 255.255.252.0" to generate a route,
> > though it point to null0, but it is not direct
> connected. Here it is:
> >
> > O 172.16.12.0/22 is a summary, 01:05:11,
> Null0
> >
> > Though it was generated on the local router, it
> was an intra area ospf
> > route, not a direct connected route.
> >
> > So it can not be redistributed into ospf by using
> "redistribute connected
> > subnet".
> >
> >
> > I think the only way of summarizing ospf route on
> an ASBR is to use static
> > route pointing to null0.
> >
> > Hans
> >
> >
> > ----- Original Message -----
> > From: "Jay Chandradas" <jachandr@cisco.com>
> > To: <yyao@sympatico.ca>; <ccielab@groupstudy.com>
> > Sent: Monday, July 30, 2001 2:35 PM
> > Subject: Re: ospf rip redistribution
> >
> >
> > > On R1 try a
> > > router ospf 100
> > > redistribute connected subnet
> > > Then try the same summary address that ypu used
> on the router. You should
> > > see the corresponding route pointing to Null 0
> and it should work.
> > >
> > > Hope this helps.
> > > Jay.
> > >
> > >
> > > ----- Original Message -----
> > > From: <yyao@sympatico.ca>
> > > To: <ccielab@groupstudy.com>
> > > Sent: Monday, July 30, 2001 9:03 AM
> > > Subject: ospf rip redistribution
> > >
> > >
> > > > All,
> > > >
> > > > I got a question on ospf and rip
> redistribution.
> > > >
> > > > ----RIP-----R1------OSPF---------
> > > > where rip=128.103.36.0/24
> > > > where ospf=128.103.35.0/25
> > > >
> > > > How can I redistribute ospf routes into rip
> without using static route?
> > > >
> > > > I know ospf route need to be summarized into
> slash 24 before it can be
> > > redistributed into rip.
> > > >
> > > > My question is: Can I use "summary address
> 128.103.35.0 255.255.255.0"
> > > command in ospf to geneteate 128.103.35.0/24
> routes and redistribute ospf
> > > into rip? I have tried, but it did not work. I
> can make it work by using
> > > static route:ip route 128.103.35.0 255.255.255.0
> null0 and redistribute
> > the
> > > static route into rip.
> > > >
> > > > Why "summary address..." is not working in
> this case?
> > > > **Please
> read:http://www.groupstudy.com/list/posting.html
> > > **Please
> read:http://www.groupstudy.com/list/posting.html
> > **Please
> read:http://www.groupstudy.com/list/posting.html
> **Please
> read:http://www.groupstudy.com/list/posting.html
>
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