From: sheherezada@gmail.com
Date: Tue Mar 04 2008 - 06:38:38 ARST
The first one is exact match (think of BGP announcing something). The
second one allows for granularity (i.e. you may announce any subnet
within 10.0.0.0/8).
HTH,
Mihai
On Tue, Mar 4, 2008 at 8:05 AM, Mike Haddad <mike.haddad@hotmail.com> wrote:
> Hello,
>
> I went through the posts for prefix-lists especially the one explained by
> Brian. The explanation is awesome but I still have one confusion which I would
> like to get answer for:
> Is
> ip prefix-list Test permit 10.0.0.0/8
> the same as
> ip prefix-list Test permit 10.0.0.0/8 ge 8 le 32
> ?
> For my understanding 10.0.0.0/8 will encompansate all hosts/subnets from
> 10.0.0.1 to 10.255.255.254 is that right?
> Also 10.0.0.0/8 ge 8 le 32 will encompansate all hosts from 10.0.0.1 to
> 10.255.255.254? Please correct me if I am wrong?
>
> Another example:
> ip prefix-list Test permit 192.168.0.0/16 will encompanaste all hosts and
> subnets within the range 192.168.0.1 to 192.168.255.254/
> ip prefix-list Test permit 192.168.0.0/16 ge 16 le 32 will encompansate the
> same range?
>
> When we say Ip prefix-list LIST permit 10.0.0.0/8 ge 21 le 29
> This means I am matching the first 8 bits which is "10" and all subnets that
> have a subnet mask greater than 21 and less than 29. So what would be the
> subnets that are included? Are they any subnet that starts with 10. and have a
> mask of 255.255.248.0 to mask 255.255.255.248 and we don't really care what is
> in the second and third octet of the IP address?
>
>
> Thanks for the clarification,
>
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