From: Lupi, Guy (Guy.Lupi@xxxxxxxxxxxxx)
Date: Thu Apr 04 2002 - 00:01:29 GMT-3
What exact version IOS are you running? I have almost the same exact setup
and it is not working. I will put whatever code you are running on there
tomorrow and try it out.
-----Original Message-----
From: John Neiberger
To: Lupi, Guy; 'Warren J Dubose '
Cc: ''Mas Kato' '; 'ccielab@groupstudy.com '
Sent: 4/3/2002 9:40 PM
Subject: Re: RE: OSPF to IGRP redistribution (I know this has been killed,
th i s is short I promise)
At this point I'm not sure who is saying what! But I'd like to
chime in. I just did a test with three routers:
[R3]-----(IGRP)-----[R2]-----(OSPF)------[R4]
The R2-R4 link is in area 0. R4 has a mixture of prefixes from
10/8 that are various lengths, all longer than /24. R3 to R2
is a /24, also in the 10/8 range.
As a test prefix I also added a /24 on R4. On R2 I turned on
OSPF to IGRP redistribution and, as expected, saw only
the /24. I then added a loopback on R2, also in 10/8, and
placed it into area 1. Then, for each prefix I added an 'area
0 range a.b.c.d 255.255.255.0'.
And now, on R3 I see:
R3#sho ip route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 6 subnets
I 10.3.1.0 [100/8976] via 10.2.1.1, 00:00:04, Serial0
C 10.2.1.0 is directly connected, Serial0
I 10.1.1.0 [100/9666] via 10.2.1.1, 00:00:04, Serial0
I 10.1.30.0 [100/9666] via 10.2.1.1, 00:00:04, Serial0
I 10.1.20.0 [100/9666] via 10.2.1.1, 00:00:04, Serial0
I 10.1.40.0 [100/9666] via 10.2.1.1, 00:00:04, Serial0
R3#
All of the above except for two were originally not /24
prefixes. So, at least in some cases, an area 0 range command
works just fine. If you redistribute OSPF into IGRP, IGRP will
pick up the summarized routes pointing at Null0.
John
---- On Wed, 3 Apr 2002, Lupi, Guy (Guy.Lupi@eurekaggn.com)
wrote:
> I have a loopback on it that I put in area 1, is that no
good? Anyway,
> here
> is the config and routing table for r1, the summary route to
null 0 is
> there, is that not allowed on the lab? It isn't a static
route, thanks
> for
> your time.
>
> r1#sh ip route
> 141.63.0.0/16 is variably subnetted, 7 subnets, 4 masks
> O 141.63.1.0/24 is a summary, 04:54:06, Null0
> C 141.63.1.0/26 is directly connected, Loopback0
> C 141.63.7.0/24 is directly connected, Serial0
> C 141.63.7.0/25 is directly connected, Serial0
> O IA 141.63.5.0/27 [110/65] via 141.63.7.5, 02:53:23,
Serial0
> C 141.63.10.0/25 is directly connected, Loopback99
> C 141.63.12.0/24 is directly connected, Ethernet0
> r1#
>
> r1#sh run
> Building configuration...
>
> Current configuration : 1532 bytes
> !
> version 12.1
> no service single-slot-reload-enable
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname r1
> !
> logging rate-limit console 10 except errors
> no logging console
> !
> ip subnet-zero
> no ip finger
> no ip domain-lookup
> !
> cns event-service server
> !
> !
> !
> !
> !
> interface Loopback0
> ip address 141.63.1.1 255.255.255.192
> ip ospf network point-to-point
> !
> interface Loopback99
> ip address 141.63.10.1 255.255.255.128
> ip ospf network point-to-point
> !
> interface Ethernet0
> ip address 141.63.12.1 255.255.255.0
> !
> interface Ethernet1
> no ip address
> shutdown
> !
> interface Serial0
> ip address 141.63.7.11 255.255.255.0 secondary
> ip address 141.63.7.1 255.255.255.128
> encapsulation frame-relay
> ip ospf network broadcast
> no fair-queue
> no arp frame-relay
> frame-relay map ip 141.63.7.5 115 broadcast
> no frame-relay inverse-arp
> !
> interface Serial1
> no ip address
> shutdown
> !
> router ospf 100
> log-adjacency-changes
> area 0 range 141.63.5.0 255.255.255.0
> summary-address 141.63.1.0 255.255.255.0
> redistribute connected subnets
> network 141.63.7.0 0.0.0.127 area 0
> network 141.63.10.0 0.0.0.127 area 1
> !
> router igrp 100
> redistribute ospf 100
> passive-interface default
> no passive-interface Ethernet0
> network 141.63.0.0
> default-metric 1500 128 128 128 128
> !
> ip kerberos source-interface any
> ip classless
> no ip http server
> !
> !
> !
> line con 0
> transport input none
> line aux 0
> line vty 0 4
> login
> !
> end
>
> r1#
>
> -----Original Message-----
> From: Warren J Dubose
> To: Lupi, Guy
> Cc: 'Mas Kato'; ccielab@groupstudy.com
> Sent: 4/3/2002 5:13 PM
> Subject: RE: OSPF to IGRP redistribution (I know this has
been killed,
> thi
> s is short I promise)
>
> Guy,
>
> MAS is correct.
>
> How can r1 belong to 2 areas when it is connected to r1
talking IGRP?
>
> There are two types of summarization in ospf:
>
> Intra-area route summarization
> ---- summarization can occur at two points in an OSPF network
at
> "AREA BORDERS", where ABRs can be configured to announce a
single
> Summary
> LSA for the range of networks residing within a "specific
area"
>
> Inter-routing Domain Route Summarization
> --- on ASBRs at "route redistribution points" where ospf
routes are
> being
> exported to another routing protocol, or non-ospf routes are
being
> imported into opsf.
>
> Check out Doyle's or Caslow's book pertaining to
summarization of OSPF.
> This should help ;)
>
> Regards,
> Warren
>
>
>
> On Wed, 3 Apr 2002, Lupi, Guy wrote:
>
> > Right, that is what I did, R1 is a member of 2 areas, area
1 and area
> 0.
> > Here is a partial output of "show ip ospf". This is why I
don't
> understand
> > why it isn't working. I thought that as long as the router
was an
> ABR, you
> > could use area range to summarize and inject into IGRP.
> >
> > r1#sh ip os
> > Routing Process "ospf 100" with ID 141.63.10.1 and Domain
ID
> 0.0.0.100
> > Supports only single TOS(TOS0) routes
> > Supports opaque LSA
> > It is an area border and autonomous system boundary router
> >
> > -----Original Message-----
> > From: Mas Kato [mailto:loomis_towcar@speedracer.com]
> > Sent: Wednesday, April 03, 2002 4:30 PM
> > To: Lupi, Guy
> > Cc: ccielab@groupstudy.com
> > Subject: RE: OSPF to IGRP redistribution (I know this has
been killed,
> > this is short I promise)
> >
> >
> > Guy,
> >
> > Although router1 is certainly an ASBR, it really doesn't
become an ABR
> until
> > it becomes a member of two or more OSPF areas. If you hung
another
> > OSPF-speaking router off of router1 and placed it in an
area different
> from
> > router5, you would then see the results of your 'area
range' command
> on that
> > new router, because that new router would know how to read
the type 3
> > summary LSAs being originated by router1.
> >
> > Regards,
> >
> > Mas Kato
> > https://ecardfile.com/id/mkato
> >
> > > "Lupi, Guy"
<Guy.Lupi@eurekaggn.com> "'ccielab@groupstudy.com'"
> > <ccielab@groupstudy.com>Date: Wed, 3 Apr 2002 14:44:12 -0500
> > >Reply-To: "Lupi, Guy" <Guy.Lupi@eurekaggn.com>
> > >
> > >I know this has been covered in detail before, I just want
to verify
> > >something. I have the following:
> > >
> > >router2---------router1--------router5
> > >
> > >Router 5 and router 1 are OSPF, router 2 and router 1 is
igrp only.
> I know
> > >how to use the secondary address, tunnel, and route-map
methods. I
> know
> > how
> > >to use summary address on router 1 to get connected routes
that are
> not in
> > >OSPF onto router 2. I cannot get routes from router 5 to
router 2
> using
> > >area range on router 1. Router 1 is an ASBR, and an ABR.
I cannot
> use the
> > >area range command to get the route from r5 to r2, and
summary
> address
> > would
> > >never work, but tunnels, route-maps, and secondary
addresses work. I
> > >thought that if the router was an ABR, you could do "area-
range [area
> route
> > >is from] x.x.x.x x.x.x.x". Thanks.
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:57:53 GMT-3