From: Ludwig Morales (lud.morales@xxxxxxxxxxxxxx)
Date: Sun May 19 2002 - 00:30:38 GMT-3
I just posted something with the same question (dont know why didt ge
trough)
But basically i have your same concern there's the need to summarize the
/22 networrk in to a /24 so that the igrp process running on R5 accepts the
135.1.20.0 route but i dont think the propose solution does this since
summary address command is use ti summarize externar advertisemtns incoming
form another AS (or so i thougth)
This was my post:
Can someone hint me here!! I'm running ospf and redistributing it to igrp
from an ASBR connected in area 4, the igrp domain does not receive the
135.1.20.0/22 network since it Ethernet has a /24 subnet (I now that) now my
question is how do I summarize the 20.0/22 network to a /24 range son that
IGRP sees the advertisement, even though my understanding was that the
summary-address command was used to summarize incoming updates from another
AS in to OSPF I used this solution as stated in fatkids configurations (Ohh
this is fatkids 502 expert redistribution lab) but still does not work. I
was able to summarize all other /22 networks located in other areas with the
area range command (but that was because this was interarea summarization)
but HOW DO I SUMMARIZE TO OTHER AS?
Thanks a lot for your help
PS I posted my configs (omitted useless info. unconfigured interfaces
etc..)
Network 135.1.0.0
R5 (igrp) 1.5/24 eth0-----------eth0 1.4/24 (igrp) R4 (OSPF area4) .20.0
/22
R5
interface Loopback5
ip address 135.1.15.5 255.255.255.0
!
interface Ethernet0
ip address 135.1.1.5 255.255.255.0
!
interface Serial0
no ip address
shutdown
!
router igrp 100
network 12.0.0.0
network 135.1.0.0
!
C 192.19.15.0/24 is directly connected, Serial1
135.1.0.0/24 is subnetted, 8 subnets
I 135.1.4.0 [100/156370] via 135.1.1.4, 00:00:36, Ethernet0
I 135.1.2.0 [100/156370] via 135.1.1.4, 00:00:36, Ethernet0
I 135.1.3.0 [100/156370] via 135.1.1.4, 00:00:36, Ethernet0
C 135.1.1.0 is directly connected, Ethernet0
I 135.1.14.0 [100/1600] via 135.1.1.4, 00:00:36, Ethernet0
C 135.1.15.0 is directly connected, Loopback5
I 135.1.13.0 [100/156370] via 135.1.1.4, 00:00:37, Ethernet0
I 135.1.100.0 [100/156370] via 135.1.1.4, 00:00:37, Ethernet0
****************************************************************************
******************
R4
interface Loopback4
ip address 135.1.14.4 255.255.255.0
!
interface Ethernet0
ip address 135.1.1.4 255.255.255.0
!
interface Serial0
ip address 135.1.20.1 255.255.252.0
encapsulation x25
ip ospf network point-to-multipoint
ip ospf priority 0
x25 address 111
x25 map ip 135.1.20.3 444 broadcast
x25 map ip 135.1.20.4 555 broadcast
!
router ospf 100
router-id 4.4.4.4
log-adjacency-changes
summary-address 135.1.20.0 255.255.255.0
redistribute igrp 100 subnets
passive-interface Ethernet0
network 135.1.20.0 0.0.0.255 area 4
!
router igrp 100
redistribute ospf 100
passive-interface Loopback4
passive-interface Serial0
network 135.1.0.0
default-metric 64 20 255 1 1500
!
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
135.1.0.0/16 is variably subnetted, 13 subnets, 3 masks
O IA 135.1.4.0/24 [110/65] via 135.1.20.4, 00:18:43, Serial0
O IA 135.1.2.0/24 [110/65] via 135.1.20.4, 00:18:43, Serial0
O IA 135.1.3.0/24 [110/65] via 135.1.20.3, 00:18:43, Serial0
O IA 135.1.3.3/32 [110/11176] via 135.1.20.4, 00:18:43, Serial0
C 135.1.1.0/24 is directly connected, Ethernet0
O IA 135.1.13.3/32 [110/11176] via 135.1.20.4, 00:18:44, Serial0
C 135.1.14.0/24 is directly connected, Loopback4
I 135.1.15.0/24 [100/1600] via 135.1.1.5, 00:00:55, Ethernet0
O IA 135.1.13.0/24 [110/65] via 135.1.20.3, 00:18:44, Serial0
O 135.1.20.3/32 [110/64] via 135.1.20.3, 00:18:44,
erial0 -----------------------> need to sumarize this to /24
C 135.1.20.0/22 is directly connected,
---------------------->
O 135.1.20.4/32 [110/64] via 135.1.20.4, 00:18:45, Serial0
O IA 135.1.100.0/24 [110/11175] via 135.1.20.4, 00:18:45, Serial0
[110/11175] via 135.1.20.3, 00:18:45, Serial0
>
> ----- Original Message -----
> From: "David Luu" <wicked01@ix.netcom.com>
> To: "Todd Spencer" <spencertm@yahoo.com>; <ccielab@groupstudy.com>
> Sent: Saturday, May 18, 2002 9:25 PM
> Subject: Re: FATKID 502 Expert Redistribution
>
>
> > i do not believe the solution provided will work, since summary-address
is
> > used to summarize going into ospf...you would need to use the command
> "area
> > 4 range 135.1.20.0 255.255.255.0" on the abr
> >
> > At 04:53 PM 5/18/2002 -0700, Todd Spencer wrote:
> > >I am trying to do the FatKid 502 Expert Redistribution
> > >Lab, and I don't understand the solution provided. I
> > >will try to briefly explain.
> > >
> > >The problem has to do with the classic VLSM to FLSM
> > >problem (IGRP/OSPF). The lab requires that OSPF area
> > >4 be configured with a /22 subnet, and the IGRP domain
> > >be configured with a /24. OSPF area 4 is using the
> > >following subnet 135.1.20.x/22 and the IGRP domain is
> > >using 135.1.1.x/24. The OSPF configuration below is
> > >taken from the solution:
> > >
> > >router ospf 1
> > > summary-address 135.1.20.0 255.255.255.0
> > > redistribute igrp 1 subnets
> > > network 135.1.14.0 0.0.0.255 area 4
> > > network 135.1.20.0 0.0.3.255 area 4
> > >
> > >I am unsure what the summary-address command is doing
> > >in this configuration. How is it able to summarize a
> > >/22 into a /24? How is the /22 subnet getting into
> > >the IGRP domain? If anyone has done this lab and can
> > >provide assistance, it would be greatly appreciated.
> > >
> > >-Todd
> > >
> > >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:59:01 GMT-3