From: alain faure (alainfaure@xxxxxxxx)
Date: Sun Mar 03 2002 - 08:03:08 GMT-3
Hi,
Since i read the mails from this mailling list, a lot's of people want to avoid
the route to Null0.
It seemes it is specialy the case after IOS 12.0.7T (so also in 12.1), This
kind of things will be generated by area...range and by summary-address .
So, David, if you try to avoid this route, i think it will not work with the
config you have. Because you will have to filter this route from the R2 route
table. That will forbid you to redistribute it on the same router from OSPF 2
to IGRP.
Except for that i think your config will work good. So i think the idea of
making a loopback and summarize it on R3 is better, because you can filter on
R3 and send the route to R2.
A m i right ?
Best regards
--- yakout <yesmat@iprimus.com.au> a icrit : > Guys,
>
> That's all good and work fine. But what if we need to redistribute ALLLL of
> ospf(1) routes into IGRP NOT ONLY "summary-address a.b.c.d ...." networks
> (which is usually the case). Then redistributing ospf(2) by itself will not
> work, we need to redistribute ospf(1) into IGRP as well.
> Please correct me if I am wrong.
>
> Cheers
>
> Yakout
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Cote, David [Contractor]
> Sent: Friday, February 01, 2002 12:53 AM
> To: 'ccielab@groupstudy.com'
> Subject: RE: what if router is ASBR only , how to /28 in to /24 IGRP ?
>
>
> I did this last night, had some /28 and /26 bit masked OSPF networks I
> needed to redistribute into IGRP which has /24 bit networks.
>
> So I created a second ospf process, redistributed the first ospf process,
> created summary-addresses in the second process, then redistributed the
> second process into igrp. worked like a charm. You don't have to have any
> networks in the second process. Sample code below:
>
>
> router ospf 1
> network 10.10.10.0 0.0.0.15 area 2
> redistribute igrp 1 metric 20 metric-type 1 subnets
>
> router ospf 2
> summary-address 10.10.10.0 255.255.255.0 <-- this network connected
> locally
> summary-address 10.10.12.0 255.255.255.0 <-- this network in area 0 that
> has a 28 bit mask
> redistribute ospf 1 subnets
>
> router igrp 1
> network 172.10.0.0
> redistribute ospf 2
>
> I also used route maps to filter routes but didn't include them here for
> clarity.
>
> - Dave Cote
>
>
>
>
>
> -----Original Message-----
> From: Chua, Parry [mailto:Parry.Chua@compaq.com]
> Sent: Wednesday, January 30, 2002 4:36 PM
> To: Bryan Ginman; tang bing
> Cc: ccielab@groupstudy.com
> Subject: RE: what if router is ASBR only , how to /28 in to /24 IGRP ?
>
>
> If you intend to do it OSPF side, then the following should work.
>
> R2# ! create a second ospf process, assisn area 0 network
> ! redistribute the ospf process into this new process with
> selection.
> ! summary the area2 network from /28 to /24
>
> R2# router ospf 123
> network a.b.c.d mask area 0
> redistribute ospf ospf-area2 subnets route-map o2o2igrp
> summary area2/28 255.255.255.0
> R2# route-map o2o2igrp permit 10
> match <area2 network/28 only>
> R2# router igrp xx
> redistribute ospf 123 <metric>
>
> I have done it on 12.0 and 12.1 IOS, both work w/o any problem.
>
> Parry Chua
>
> -----Original Message-----
> From: Bryan Ginman [mailto:ginmanb@westnet.com]
> Sent: Thursday, January 31, 2002 12:52 AM
> To: tang bing
> Cc: ccielab@groupstudy.com
> Subject: RE: what if router is ASBR only , how to /28 in to /24 IGRP ?
>
>
> OK that's a bit clearer. The only way you can do this is this then.
>
> 1 Create a tunnel between r1 and r2 with a /28 run igrp over this. Your
> /28
> routes will come in then
>
> 2 Create a loopback and add it to another are that will then allow you
> to
> area range it.
>
> 3 Create a static route to Null0 that summarizes at /24
>
> Cheers,
>
> Bryan
> -----Original Message-----
> From: tang bing [mailto:tang_bing@yahoo.com]
> Sent: Wednesday, January 30, 2002 11:16 AM
> To: Bryan Ginman
> Cc: ccielab@groupstudy.com
> Subject: RE: what if router is ASBR only , how to /28 in to /24 IGRP ?
>
>
> r1
> |
> |
> igrp/24
> |
> |
> r2
> |(int e0/0)
> |
> ospf-area2-/28
> |
> |
> r3
> |
> area 0
>
> since r2-e0/0 is in the OSPF process 1 area 2 , r2 is
> ASBR , but not ABR .
> I configured an other OSPF process 2 , redist process
> 1 in .
> e0/0 is still not in database as type-5 , so you
> cann't summary-address it .
> area-range ? you cannot put e0/0 in process 2 ,
> because one interface can only be in one process .
>
>
> r3#sh1 router
> router ospf 1
> log-adjacency-changes
> area 0 range 132.2.3.0 255.255.255.0
> redistribute igrp 1 metric 10 subnets
> network 132.2.3.0 0.0.0.15 area 0
> !
> router ospf 2
> log-adjacency-changes
> redistribute ospf 1 subnets
> network 132.2.99.0 0.0.0.255 area 0
> !
> router igrp 1
> redistribute ospf 1 metric 1000 10 255 1 1500
> passive-interface Ethernet0/0
> network 132.2.0.0
> !
> ip classless
> no ip http server
> !
> dialer-list 1 protocol ip permit
> route-map conn-ospf permit 10
> match interface Ethernet0/0
> !
> bridge 1 protocol ieee
> alias exec ip show ip route
> alias exec bg show ip bgp
> alias exec bs show ip bgp sum
> alias exec ci clear ip route *
> alias exec cb clear ip bgp *
> alias exec i show run int
> alias exec r show run
> alias exec bri sh ip int brie bri1/0:1
> alias exec cbri clear int brI 1/0
> alias exec o show ip ospf nei
> alias exec c conf t
> alias exec br show ip int brie
> alias exec cs clear ip bgp * soft out
> alias exec ipx sh ipx rout
> alias exec ipxbri show ipx inter brie
> alias exec cipx clear ipx route *
> alias exec ipxs sh ipx server
> alias exec sh1 show run | begin
>
> r3#sh ip os
> r3#sh ip ospf da
> r3#sh ip ospf database
>
> OSPF Router with ID (132.2.99.1) (Process ID 2)
>
>
> Router Link States (Area 0)
>
> Link ID ADV Router Age Seq#
> Checksum Link count
> 132.2.99.1 132.2.99.1 1776 0x80000003
> 0x9CD0 1
>
> Type-5 AS External Link States
>
> Link ID ADV Router Age Seq#
> Checksum Tag
> 117.1.1.1 132.2.99.1 1776 0x80000003
>
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