RE: Route Filtering using Prefix Lis

From: Deji Steve-Fagbemi (deji500@hotmail.com)
Date: Thu Feb 08 2007 - 07:17:45 ART


Scott, Manjeet or anyone else with a good grasp of prefix-lists,

I am struggling really hard to understand the prefix-lists proposed by
Scott.
I have a basic understanding of prefix-lists. I can match routes with a
prefix-list but I can not get the ones proposed by Scott. What if it were
all routes below 161.0.0.0/8?

Someone please help.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Manjeet Chawla
Sent: Tuesday, February 06, 2007 4:13 AM
To: Victor Cappuccio
Cc: swm@emanon.com; ccielab@groupstudy.com
Subject: Re: Route Filtering using Prefix Lis

198.0.0.0/8 is probably not the right answer as it only covers the
"198.0.0.0 - 198.255.255.255"

whereas the question (as I read it) is asking for "0.0.0.0 -
197.255.255.255" range as reflecting in Scott's reply.

-Manjeet

Victor Cappuccio wrote:
> Hi Manjeet
>
> He made it sound like 0-197 in what he was asking
>
> >
> > Any idea hwo we can have route only from 1-197 as the first Octet.
> >
>
> But
>
> >
> > I have a situation where i have to allow all prefixes below
> 198.0.0.0/8 <http://198.0.0.0/8>.
> >
>
> So the question was for the first one or the second one? So Scott
> answered it the Second one and I answered the first one
>
> Thanks
>
> Victor.-
>
>
> On 2/5/07, *secondie* <secondie@gmail.com <mailto:secondie@gmail.com>>
> wrote:
>
> Victor, I think allows all 198.0.0.0/8 <http://198.0.0.0/8> LE 32
> allows only 198.0.0.0 <http://198.0.0.0> -
> 198.255.255.255 <http://198.255.255.255> and LE 32 allows any
> subnet mask in the range mentioned.
>
> Ahmed wants all the subnet from 1-197 in the first octet to be
> permitted
> through :-)
>
> -Manjeet
> CCIE # 5591 (R&S/Security)
>
>
>
>
>
> Victor Cappuccio wrote:
> > Hi Scott,
> >
> > What about this prefix-list
> >
> > permit 198.0.0.0/8 <http://198.0.0.0/8> le 32
> >
> > Thanks
> > Victor.-
> >
> > -----Mensaje original-----
> > De: nobody@groupstudy.com <mailto:nobody@groupstudy.com> en
> nombre de Scott Morris
> > Enviado el: lun 05/02/2007 13:12
> > Para: Ahmed Mohiuddin; ccielab@groupstudy.com
> <mailto:ccielab@groupstudy.com>
> > Asunto: RE: Route Filtering using Prefix List
> >
> > 0.0.0.0/1 <http://0.0.0.0/1> le 32
> > 128.0.0.0/2 <http://128.0.0.0/2> le 32
> > 192.0.0.0/6 <http://192.0.0.0/6> le 32
> > 196.0.0.0/7 <http://196.0.0.0/7> le 32
> >
> > HTH,
> >
> >
> > Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider)
> #4713, JNCIE
> > #153, CISSP, et al.
> > CCSI/JNCI-M/JNCI-J
> > IPexpert VP - Curriculum Development
> > IPexpert Sr. Technical Instructor
> > smorris@ipexpert.com <mailto:smorris@ipexpert.com>
> > http://www.ipexpert.com
> >
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com <mailto:nobody@groupstudy.com>
> [mailto:nobody@groupstudy.com <mailto:nobody@groupstudy.com>] On
> Behalf Of
> > Ahmed Mohiuddin
> > Sent: Sunday, February 04, 2007 11:45 PM
> > To: ccielab@groupstudy.com <mailto:ccielab@groupstudy.com>
> > Subject: Route Filtering using Prefix List
> >
> > Hi All,
> >
> > I have a situation where i have to allow all prefixes below
> 198.0.0.0/8 <http://198.0.0.0/8>.
> >
> > I am trying to use prefix list to accomplish this but does nto
> seem to help.
> >
> > Any idea hwo we can have route only from 1-197 as the first Octet.
> >
> > Thanks
> > Ahmed
> >
> >
> >
> >
>



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