From: Padhu (LFG) (padhu@xxxxxxxxxxxx)
Date: Tue May 22 2001 - 13:29:39 GMT-3
I see a lot of emails about using a second ospf process to fix this
redistribution. Basically this would create 2 ospf AS in the test network,
which could also complicate virtual-links and authentication etc. Can
someone throw some more light on this or am i reading too much into this ?
Definetly would be usefull to know "all possible methods" of doing things .
Cheers,Padhu
-----Original Message-----
From: Sandro Ciffali [mailto:sandyccie@yahoo.com]
Sent: Monday, May 21, 2001 9:37 PM
To: cao lingwei; ccielab@groupstudy.com
Subject: Re: another redistribution question
Yes it will, But the purpose of redistributing the /28 to /24 is served,
Eventhough the route is now learnt as external ospf route still the
connectivity works fine
sandro
----- Original Message -----
From: "cao lingwei" <caolw@fosco.com.cn>
To: "Sandro Ciffali" <sandyccie@yahoo.com>; <ccielab@groupstudy.com>
Sent: Monday, May 21, 2001 9:47 PM
Subject: Re: another redistribution question
>
> redistribute connected is wrong,because it will change the ospf
database.....
> ----- Original Message -----
> From: "Sandro Ciffali" <sandyccie@yahoo.com>
> To: <ccielab@groupstudy.com>
> Sent: Tuesday, May 22, 2001 9:05 AM
> Subject: Re: another redistribution question
>
>
> > Here are my two cents on the topic classless to
> > classful redistribution.
> > I am assuming the ASBR running ospf and igrp has same
> > major network and subnets /24 for igrp and /28 for
> > ospf, Ospf backbone is area 0 with a multipoint
> > network to the other two and point to point to router
> > running igrp
> > So when you configure IGRP on this ASBR, the OSPF
> > interface (/28) is also running igrp in passive mode.
> > Now on this router when you say summary address
> > x.x.x.x mask It assumes you are summarizing IGRP
> > routes being redistributed into OSPF, The summary
> > addresses works fine this way, If you check routing
> > tables of the other ospf spokes you would see this
> > summary route as E2 route (they would have /28 as
> > attached and /24 as E2 summary). Then OSPF
> > redistributes this route back in IGRP fine. This is
> > kind of confusing, Since summary address is generated
> > from redistributed route from igrp and then this
> > summary address is redistributed back in igrp, but it
> > works fine. This works only for ASBR for no other ospf
> > router. Atleast i don't know any simpler way than
> > this. For router other than asbr the best way is to
> > redistribute connected or someway of brining these
> > routes external and summarize them.
> >
> > Thanks
> > Sandro
> > ----- Original Message -----
> > From: "garry baker" <fallow46@yahoo.com>
> > To: "David Anderson" <dma@cisco.com>; "Roman Rodichev"
> > <rodic000@hotmail.com>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Sunday, May 20, 2001 11:31 PM
> > Subject: RE: another redistribution question
> >
> >
> > > David,
> > >
> > > you could try a second ospf process and redistribute
> > > your main process into your second and then use the
> > > summary-address command and redistribute the second
> > > process into igrp. i did something like this
> > recently
> > > but i had to redistribute both ospf processes to get
> > > all my /24 routes into igrp, not too sure why i had
> > to
> > > do that, does anyone have any ideas?
> > >
> > > Garry
> > > --- David Anderson <dma@cisco.com> wrote:
> > > > Roman,
> > > > I tried the area 0 range on one of the routers
> > that
> > > > was one hop away from
> > > > the ASBR. However the ASBR is also part of area 0
> > > > and I cant seem to get
> > > > the summary route to show up in the ASBR or any of
> > > > the routers. Any
> > > > ideas? I am going to try again and just see if I
> > > > missed something.
> > > > Thanks,
> > > > David
> > > > At 09:45 PM 5/20/2001 -0500, Roman Rodichev wrote:
> > > >
> > > > >Where did you see that command?! I don't think it
> > > > exists. :) Summarization
> > > > >doesn't make any sense under IGRP. It is
> > classful.
> > > > >
> > > > >ip summary-address can only be done for EIGRP and
> > > > RIPv2
> > > > >
> > > > >roman
> > > > >
> > > > >
> > > > >>From: "Gregory W. Posey Jr."
> > <gposey@conects.com>
> > > > >>Reply-To: "Gregory W. Posey Jr."
> > > > <gposey@conects.com>
> > > > >>To: "David Anderson" <dma@cisco.com>,
> > > > <ccielab@groupstudy.com>
> > > > >>Subject: RE: another redistribution question
> > > > >>Date: Sun, 20 May 2001 22:17:39 -0400
> > > > >>
> > > > >>I believe you use the "summary-address" command
> > > > when summarizing between
> > > > >>OSPF and another routing protocol.
> > > > >>
> > > > >>The "area range" command is for when you
> > summarize
> > > > from one area to the next
> > > > >>(on an ABR) within OSPF.
> > > > >>
> > > > >>To summarize from one protocol (e.g. EIGRP) into
> > > > OSPF, use the
> > > > >>"summary-address" command under the OSPF
> > > > "config-router" mode.
> > > > >>
> > > > >>For your situation (summarizing from OSPF into
> > > > another routing protocol), if
> > > > >>IGRP acts the same as EIGRP, then you configure
> > it
> > > > under the interface
> > > > >>"config-if" mode, and the command is...
> > > > >>
> > > > >>"ip summary-address igrp 101 X.X.X.X Y.Y.Y.Y"
> > > > >>
> > > > >>Of course either/both command(s) is/are
> > configured
> > > > on the router that runs
> > > > >>both OSPF and IGRP.
> > > > >>
> > > > >>
> > > > >>Thank you,
> > > > >>Greg Posey Jr.
> > > > >>CONECTS Network Analyst
> > > > >>CCNP - Security Specialist
> > > > >>Cisco Voice Access Specialist
> > > > >>
> > > > >>-----Original Message-----
> > > > >>From: nobody@groupstudy.com
> > > > [mailto:nobody@groupstudy.com]On Behalf Of
> > > > >>David Anderson
> > > > >>Sent: Sunday, May 20, 2001 9:24 PM
> > > > >>To: ccielab@groupstudy.com
> > > > >>Subject: another redistribution question
> > > > >>
> > > > >>
> > > > >>Ok, here is my redistribution question:
> > > > >>
> > > > >>Suppose I have an OSPF area (say area 0) with a
> > > > /28 mask and I am
> > > > >>redistributing with IGRP which has a /24 mask.
> > > > Can one summarize the area
> > > > >>0 using the area range command on the ASBR? I
> > > > tried and could not get it
> > > > >>to work. However, what I did get to work was to
> > > > create a loopback on
> > > > >>another router in my ospf domain using the same
> > > > subnet I have in my area 0,
> > > > >>but with a /24 mask and then advertised that
> > into
> > > > ospf and all was well on
> > > > >>the IGRP router. I could ping all of my /28
> > ospf
> > > > interfaces. Does anyone
> > > > >>have any suggestions other than this? Did I
> > miss
> > > > anything?
> > > > >>
> > > > >>Thanks everyone,
> > > > >>David
> > > > >>David Anderson
> > > > >>Network Design Engineer
> > > > >>Enterprise Solutions Architecture & Design
> > > > >>(408) 853-5515
> > > > >>dma@cisco.com
> > > > >> | |
> > > > >> ..:|||||||:...:|||||||:..
> > > > >>C I S C O S Y S T E M S
> > > > >>**Please
> > > > read:http://www.groupstudy.com/list/posting.html
> > > > >>**Please
> > > > read:http://www.groupstudy.com/list/posting.html
> > > >
> > >
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