From: Mike Gutknecht (mike@xxxxxxxxxxxxx)
Date: Mon Jun 11 2001 - 13:25:37 GMT-3
Sorry to come late to the party. Roman, the idea you have below is
interesting. Have you tried it. I'm curious to know whether the ABR will
recieve a /26 from say area 0 when it is summarizing that address space as a
/24 in area 1 (with area range command). If it doesn't take the route, then
the /26 is black-holed.
-----Original Message-----
From: Roman Rodichev [mailto:rodic000@hotmail.com]
Sent: Sunday, June 10, 2001 1:42 PM
To: gfarber@cisco.com; signal@shreve.net
Cc: michael_lee50@hotmail.com; padhu@steinroe.com;
ccielab@groupstudy.com
Subject: Re: IGRP with /28 and ospf with /25, 26 , 27, 28,29,30 -
Redistributi on problem
Guy, actually there is another way. You are probably talking about situation
when you have ASBR connected, for example, as /26 to OSPF domain and as /24
to IGRP. Obviously, you can't use summary-address to do that. Yes, you could
redistribute connected. But you could also do the following. When you
address your OSPF areas using the address space you were given, just make
sure that some other area falls into the same /24 range as the area where
your ASBR is. Then you could simply use "area range" to summarize the other
area, and you should see /24 summary on ASBR too. :)
I hope my explanation is clear
>From: "Guy Farber" <gfarber@cisco.com>
>Reply-To: "Guy Farber" <gfarber@cisco.com>
>To: "Brian" <signal@shreve.net>, "Roman Rodichev" <rodic000@hotmail.com>
>CC: <michael_lee50@hotmail.com>, <padhu@steinroe.com>,
><ccielab@groupstudy.com>
>Subject: Re: IGRP with /28 and ospf with /25, 26 , 27, 28,29,30 -
>Redistributi on problem
>Date: Sun, 10 Jun 2001 23:09:15 +0200
>
>Brian,
>
>It's the other way around. You can use the summary-address command to
>summarize routes coming in from external protocols. For this reason doing
>redistribute connected on a /26 into ospf and then summarizing to /24 will
>solve most of these situations. I just hope they'll accept this strategy in
>the lab...
>
>----- Original Message -----
>From: "Brian" <signal@shreve.net>
>To: "Roman Rodichev" <rodic000@hotmail.com>
>Cc: <michael_lee50@hotmail.com>; <padhu@steinroe.com>;
><ccielab@groupstudy.com>
>Sent: Sunday, June 10, 2001 9:51 PM
>Subject: Re: IGRP with /28 and ospf with /25, 26 , 27, 28,29,30 -
>Redistributi on problem
>
>
> > On Sun, 10 Jun 2001, Roman Rodichev wrote:
> >
> > > it's simplier than that. If you have /24 OSPF route in your routing
>table,
> > > you can't "summarize" it (that term looses it's meaning actually) down
>to
> > > /25 using area-range
> > >
> > > And, by the way, I'm sorry I made a mistake. summary-address can't be
>used
> > > for OSPF->IGP summarization at all. Sorry
> >
> > hmm, Roman are you sure about that last statment? If I have /28's or
> > /26's in my OSPF and would like them to appear in my other IGP's as
>/24's
> > instead, why can't I use summary-address? The purpose of
>summary-address
> > is to summarize from OSPF->non-OSPF IGP's. Perhaps I am confused about
> > something........
> >
> > Brian
> >
> >
> >
> > >
> > >
> > > >From: "michale_lee50@hotmail.com" <michael_lee50@hotmail.com>
> > > >To: "Roman Rodichev" <rodic000@hotmail.com>, <padhu@steinroe.com>,
> > > ><ccielab@groupstudy.com>
> > > >Subject: Re: IGRP with /28 and ospf with /25, 26 , 27, 28,29,30 -
> > > >Redistributi on problem
> > > >Date: Sun, 10 Jun 2001 13:45:10 -0500
> > > >
> > > >scenario. I just need a way to inject the ospf /25 thro /30 as /28
>into
> > > >IGRP...?? This is your question
> > > >
> > > >I have to say that is a strange one. Maybe I'm geting a little too
>old
>but
> > > >I
> > > >am under the impression that you want to redistribute a /28 into IGRP
>?
> > > >mayby you want to redistribute an ospf network that is directly
>connected
> > > >into IGRP but that network is not downstrean so you can's use
>area-range
> > > >and
> > > >it's not coming into ospf so you can's use summary addres?
> > > >
> > > >is this the case?
> > > >
> > > >Mr.Lee
> > > >
> > > >----- Original Message -----
> > > >From: "Roman Rodichev" <rodic000@hotmail.com>
> > > >To: <michael_lee50@hotmail.com>; <padhu@steinroe.com>;
> > > ><ccielab@groupstudy.com>
> > > >Sent: Sunday, June 10, 2001 1:02 PM
> > > >Subject: Re: IGRP with /28 and ospf with /25, 26 , 27, 28,29,30 -
> > > >Redistributi on problem
> > > >
> > > >
> > > > > Mr.Lee, you can't use summary-address and area range commands to
>go
>from
> > > > > shorter to longer bit mask.
> > > > >
> > > > > >From: "michale_lee50@hotmail.com" <michael_lee50@hotmail.com>
> > > > > >To: "Roman Rodichev" <rodic000@hotmail.com>,
><padhu@steinroe.com>,
> > > > > ><ccielab@groupstudy.com>
> > > > > >Subject: Re: IGRP with /28 and ospf with /25, 26 , 27, 28,29,30 -
> > > > > >Redistributi on problem
> > > > > >Date: Sun, 10 Jun 2001 12:56:20 -0500
> > > > > >
> > > > > >Guess I'm sort of late on this but I have to say that Policy
>routing is
> > > > > >certainly NOT the only way, you can accomplish this with the
> > > > > >summary-address
> > > > > >or the area-range in a given situation.
> > > > > >
> > > > > >Just hit the link and understand where and when to apply each
>command.
> > > > > >
> > > > > >Mr.Lee
> > > > > >----- Original Message -----
> > > > > >From: "Roman Rodichev" <rodic000@hotmail.com>
> > > > > >To: <padhu@steinroe.com>; <ccielab@groupstudy.com>
> > > > > >Sent: Friday, June 08, 2001 10:58 PM
> > > > > >Subject: Re: IGRP with /28 and ospf with /25, 26 , 27, 28,29,30 -
> > > > > >Redistributi on problem
> > > > > >
> > > > > >
> > > > > > > you are wasting your time, policy routing is the only solution
> > > > > > >
> > > > > > > >From: "Padhu (LFG)" <padhu@steinroe.com>
> > > > > > > >Reply-To: "Padhu (LFG)" <padhu@steinroe.com>
> > > > > > > >To: "'ccielab@groupstudy.com'" <ccielab@groupstudy.com>
> > > > > > > >Subject: IGRP with /28 and ospf with /25, 26 , 27, 28,29,30 -
> > > > > >Redistributi
> > > > > > > >on problem
> > > > > > > >Date: Thu, 7 Jun 2001 21:49:24 -0500
> > > > > > > >
> > > > > > > >I know we have beaten the crap out of VLSM / FLSM scenario.
>Its
> > > >working
> > > > > > > >fine
> > > > > > > >with IGRP /24 and ospf having longer masks ...( with area
>ranges
> > > >and
> > > > > > > >summary
> > > > > > > >addresses blah blah etc) ..
> > > > > > > >
> > > > > > > >Now the reverse ...I know i can plug in the ip default
>network
>for
> > > >this
> > > > > >and
> > > > > > > >will work. However i am wondering if anyone on the list has
>got
> > > >this
> > > > > > > >working
> > > > > > > >without ip default network for this scenario. Summary-address
>and
> > > >area
> > > > > > > >ranges are so out of whack here i can't get this straight in
>this
> > > > > >reverse
> > > > > > > >scenario. I just need a way to inject the ospf /25 thro /30
>as
>/28
> > > >into
> > > > > > > >IGRP...
> > > > > > > >
> > > > > > > >No Statics ofcourse.
> > > > > > > >
> > > > > > > >Appreciate any help. My ASBR is running 12.0(14).
> > > > > > > >
> > > > > > > >Or you can simply tell me i am wasting time to do the
>impossible
> > > >...(
> > > > > > > >Ofcourse i can't tell the proctor that)
> > > > > > > >
> > > > > > > >Cheers,Padhu
> > > > > > > >**Please read:http://www.groupstudy.com/list/posting.html
> > > > > > >
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