From: Padhu (LFG) (padhu@xxxxxxxxxxxx)
Date: Wed Jun 06 2001 - 19:00:05 GMT-3
On a similar lab that i am working on with igrp /24 and ospf with /25 thro
/30 , what i did
is create an ACL with all IGRP nets and create a route-map igrp-ospf and
redistributed this into ospf. Now i added the subnet for the summary address
also in this acl..so that this /24 would go into igrp and feedback into ospf
where it is subject to the summary address rule..Untill then it doesn't
install the null 0 route also in the ASBR.
If i use the summary-address 147.1.20.0 255.255.255.0 not-advertise not
advertise option this doesn't get redistibuted into igrp also, even though
it helps clearing out the E2 route in the ospf domain.
Cheers,Padhu
-----Original Message-----
From: Mannan Venkatesan [mailto:venkat_m@ins.com]
Sent: Wednesday, June 06, 2001 3:52 PM
To: ccielab@groupstudy.com; Himawan Nugroho
Subject: Re: Fw: /22 summary to /24 flsm
I tried, but didn't work. When you use route-map on redistribution router,
redistribution from IGRP to OSPF won't happen. Has anyone else tried this?
----- Original Message -----
From: "Himawan Nugroho" <nhimawan@id.ibm.com>
To: "Mannan Venkatesan" <venkat_m@ins.com>; <ccielab@groupstudy.com>
Sent: Tuesday, June 05, 2001 10:52 PM
Subject: Re: Fw: /22 summary to /24 flsm
>
> Are you sure you can't filter the summary on the redistribution router?
> How if we put route-map and restrictive access-list in redistribute igrp
> command, so it only allow route from internal IGRP get into OSPF?
>
> Regards,
> Himawan Nugroho
> Network Solutions Specialist
> IBM Global Services - Indonesia
> Voice : 62-21-5238897, Fax : 62-21-2512933
>
>
> "Mannan Venkatesan" <venkat_m@ins.com>@groupstudy.com on 06/06/2001
> 09:16:37 AM
>
> Please respond to "Mannan Venkatesan" <venkat_m@ins.com>
>
> Sent by: nobody@groupstudy.com
>
>
> To: <ccielab@groupstudy.com>, <padhu@steinroe.com>
> cc:
> Subject: Fw: /22 summary to /24 flsm
>
>
> Nope. What happens is when you use summary address, it creates null0 route
> which again is being redistributed back to OSPF as external route and it
> appears on all ospf routers. You can't filter this on the redistribution
> router. The solution is either filter it on each ospf router or use
> 'not-advertise' command.
>
> Note that in some older IOS version 'not-advertise option wouldn't work as
> I
> specified above.
>
> If you search archives, you can find a thread on this.
>
> HTHs,
> Mannan
>
> ----- Original Message -----
> From: Padhu (LFG)
> To: 'Mannan Venkatesan'
> Sent: Tuesday, June 05, 2001 11:13 AM
> Subject: RE: /22 summary to /24 flsm
>
>
> Thanks for the config.
>
> router ospf 10
> summary-address 147.1.20.0 255.255.255.0 not-advertise
> summary-address 147.1.1.0 255.255.255.0 not-advertise
>
> Isn't the not-advertise meant for filtering type 7 lsa when used with
> summary-address ?
> -----Original Message-----
> From: Mannan Venkatesan [mailto:venkat_m@ins.com]
> Sent: Monday, June 04, 2001 10:46 PM
> To: Arthayuth.B@Datacraft-Asia.com; Padhu (LFG); Michael Herald; David
> Anderson
> Subject: RE: /22 summary to /24 flsm
>
>
> Here you go,
>
> ---r1--------r2--------r3-------r4
> I /24 I/O /22 O /21
>
> HTHs,
>
> Mannan Venkatesan
> CCNP, CCDP
> Network Systems Engineer
> Lucent Worldwide Services - Enhanced Services
> King Of Prussia
> Pager: 888-663-3853
> Email : mannan.venkatesan@ins.com
> Epage : page_mannan_venkatesan@ins.com
>
> "Even if I knew I had only 1 more week to live, I would still schedule
> my CCIE lab. I would just have to work a little harder I guess. After
> all,
> without any goals in life, I'm dead already."
>
> ~A CCIE Candidate~
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