From: David Nie (david.nie@xxxxxxxxxxxxxxxxxxxxx)
Date: Sat Aug 18 2001 - 02:02:50 GMT-3
you can "redistribute connected" and "summary" it, even if the interface has be
en in ospf process.
I have tried it.
----- Original Message -----
From: "Jim Brown" <Jim.Brown@CaseLogic.com>
To: "'Gregory W. Posey Jr.'" <gposey@conects.com>; "Mike Schlenger" <mschlenger
@n2nsolutions.com>; "Jim Brown" <Jim.Brown@CaseLogic.com>; <ccielab@groupstudy.
com>
Sent: Saturday, August 18, 2001 11:05 AM
Subject: RE: A cry for redistribution help! VLSM /28 into FLSM /24 (summar y-ad
dress)
> This only works if the loopbacks have not been selected through a
> network
> statement under the OSPF process.
>
> What do you do if they are already in advertised in the OSPF domain as
> native routes and not entered into the process via redistribute
> connected as
> external routes.
>
>
>
> -----Original Message-----
> From: Gregory W. Posey Jr. [mailto:gposey@conects.com]
> Sent: Friday, August 17, 2001 8:46 PM
> To: Mike Schlenger; 'Jim Brown '; ccielab@groupstudy.com
> Subject: RE: A cry for redistribution help! VLSM /28 into FLSM /24
> (summar y-ad dress)
>
>
> My understanding is that you do a "redistribute connected" on the router
> that has the /30 loopback subnets, and this is the same router that you
> do
> the "summary address" on (with a /24, or whatever you eventually need
> for
> IGRP to accept it). That way you are really summarizing the /30's INTO
> OSPF
> with summary address, then propagating that summary on to the ASBR (if
> this
> router is NOT the ASBR) and on to IGRP.
>
> I don't think there is a "direct" way to use "summary address" to go
> FROM
> OSPF TO IGRP (or some other protocol). The trick seems to be getting
> the
> summary (/24 for example) INTO OSPF via redistribution and the "summary
> address" command, THEN redistributing it from OSPF into another
> protocol.
>
> Thank you,
> Greg Posey Jr.
> CONECTS Network Analyst
> CCIE #7981
> CCDA/CCNP - Security Specialist
> Cisco Voice Access Specialist
> 313-875-2088 ext. 347
> www.conects.com
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Mike Schlenger
> Sent: Friday, August 17, 2001 7:55 PM
> To: 'Jim Brown '; 'ccielab@groupstudy.com'
> Subject: RE: A cry for redistribution help! VLSM /28 into FLSM /24
> (summar y-ad dress)
>
>
> I would try using the summary-address command on the router (r1) that
> you
> configured the loopbacks on. Its ok if R2 sees a /24 for those networks
> because he has to advertise it to r3 anyway. My rule of thumb is to
> never
> try and summaize networks that do not originate on that router. For
> example
> if I had 10.1.x.0/24 networks on this router with network 172.16.x.0/24
> networks being advertised to me, i would never try and summaraize the
> 172
> network because the routes didn't originate on that router. Give it a
> whirl
> and see what happens. I don't have time to set it up myself or i'd give
> it a
> go.
>
> Mike
> 7079
>
> -----Original Message-----
> From: Jim Brown
> To: 'ccielab@groupstudy.com'
> Sent: 8/17/01 4:52 PM
> Subject: A cry for redistribution help! VLSM /28 into FLSM /24
> (summary-ad
> dress)
>
> On my quest for redistribution knowledge, this has escaped me.
>
> I have searched high and low, through the archives, in Usenet, and on
> the
> Cisco web site to no avail.
>
> This discussion has gone on forever and I cannot replicate it with any
> consistency.
>
> How do you use the summary-address command at the redistribution point
> to
> summarize longer masks into shorter masks?
>
> Everyone tells me it works, but not for me. Am I missing something? Are
> there gothcas escaping me?
>
> I'm throwing in the towel and begging for help. I pray the
> redistribution
> Gods will smile on me and offer enlightenment.
>
> Scenario in question:
>
> Area0--R1--Area1--R2--IGRP--R3
>
> I have a couple of LoopBack interfaces in Area 0 with a /30. I
> attempting to
> summarize them in to a /24 for successful redistribution into IGRP. I
> apply
> the summary-address command on R2, but they won't appear in the R2 IGRP
> update, or on R3 if you could imagine that.
>
> I know the summary-address command is documented for summarization INTO
> OSPF
> on an ASBR, but there is so much talk about using it in the reverse that
> I
> feel left out of the party.
>
> I know I can use an area range command on an ABR for summarization
> upstream.
>
> I know I can inject a default route into the FLSM to provide
> reachability.
>
> All this I know, but what I want to use is the summary-address command.
> HELP!
> **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
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:31:53 GMT-3