From: Jason (jgraun@xxxxxxxxx)
Date: Thu Apr 04 2002 - 00:57:16 GMT-3
Here is what I thought was the original scenario
(R1)---IGRP 10---(R2)--area 0--(R3)--area 10
mask is /27 on link between R2-R3, IGRP 10 is using
a /24 mask. The area 0 range command to summarize the link between
R2-R3 will not work, I have seen certain release of 12.0 that will let
this happened but in 12.1 it won't work.
Jason
-----Original Message-----
From: Chua, Parry [mailto:Parry.Chua@compaq.com]
Sent: Wednesday, April 03, 2002 8:22 PM
To: Jason; Lupi, Guy; Warren J Dubose
Cc: 'Mas Kato' ; ccielab@groupstudy.com
Subject: RE: OSPF to IGRP redistribution (I know this has been killed,
th i s is short I promise)
I am not sure about 12.2, I ahve work on up to 12.1, you can do area 0
range command in abr.
assume you do area 0 at R2 and area 444 rnage at R4, this what should
have happen
<--------------(area 0 summary)
<--------------<-----------<-------area 444 summary route)
(R1)---area 111---(R2)--area 0--(R3)--area 0--(R4)--area 444--(R5)
You can see the area 0 summary in R1
You can see the area 444 summary route in R3,R2 and R1
Parry Chua
-----Original Message-----
From: Jason [mailto:jgraun@attbi.com]
Sent: Thursday, April 04, 2002 9:30 AM
To: 'Lupi, Guy'; 'Warren J Dubose '
Cc: ''Mas Kato' '; ccielab@groupstudy.com
Subject: RE: OSPF to IGRP redistribution (I know this has been killed,
th i s is short I promise)
You cannot summarize area 0, doyle's first book talks about that the
best way to solve this problem is to use a tunnel. I am also curious as
to how you used a route-map to redistribute the routes?
Jason
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Lupi, Guy
Sent: Wednesday, April 03, 2002 6:54 PM
To: 'Warren J Dubose '
Cc: ''Mas Kato' '; 'ccielab@groupstudy.com '
Subject: RE: OSPF to IGRP redistribution (I know this has been killed,
th i s is short I promise)
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 - 10:57:54 GMT-3