From: Scott Morris (swm@emanon.com)
Date: Thu Feb 08 2007 - 15:26:35 ART
Yeah, that's the post-caffeine version of what I said. ;)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Marvin Greenlee
Sent: Thursday, February 08, 2007 11:45 AM
To: Scott Morris; 'Deji Steve-Fagbemi'; 'Manjeet Chawla'; 'Victor Cappuccio'
Cc: ccielab@groupstudy.com
Subject: RE: Route Filtering using Prefix Lis
I think you mean 128-159
and then 160-161
--- Scott Morris <swm@emanon.com> wrote:
> It's all a matter of breaking things into binary and finding the
> matches.
> Kinda the reverse way of how we find bit boundaries for subnet masks.
>
> With a number between 0 and 161, where are the bit boundaries?
>
> 0-127 is one.
> 128-160 is another.
> Then 161 all alone (if you are including it).
>
>
> The more work you do with binary, the more this will come naturally.
> Until then, it's much like you do with subnet masks except that we are
> more concerned with the left side than the right side.
> :)
>
> 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
> http://www.ipexpert.com
>
>
>
> -----Original Message-----
> From: Deji Steve-Fagbemi
> [mailto:deji500@hotmail.com]
> Sent: Thursday, February 08, 2007 5:18 AM
> To: 'Manjeet Chawla'; 'Victor Cappuccio'
> Cc: swm@emanon.com; ccielab@groupstudy.com
> Subject: RE: Route Filtering using Prefix Lis
>
> 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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