From: Tarun (tarun.ccie@gmail.com)
Date: Tue Apr 15 2008 - 02:39:48 ART
That prefix 192.0.0.0/3 ge 24 means the following.
1) It will match only the first 3 bits of the IP '192.0.0.0' which means any
class C address because class C addresses are characterized by a '110' in
the beginning of there 1st octet.
2) The 'ge 24' part means that the subnets mask of the class C address just
matches has to be either equal to or greater than 24, i.e it will not match
192.168.2.3/16 for example.
If you want to permit all "Class C networks" then the prefix list ideally
should be
ip prefix CLASS_C_NETWORKS permit/deny 192.0.0.0/3 le 32 - this would
include all subnetted class C addresses as well.
This is a good link on prefix lists:
http://ccienotes.blogspot.com/2007/08/ip-prefix-list.html
On 4/15/08, Athaide, Dwayne <DAthaide@eprod.com> wrote:
> Please check
>
> If I want to permit only Class C networks
>
>
>
> Is this correct?
>
>
>
> 192.0.0.0/3 ge 24
>
>
>
> Thanks
>
>
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