From: paul.cocker@bt.com
Date: Tue Jul 03 2007 - 06:27:39 ART
Hi Vivjay,
Thanks for you response.
I thought there was no field in the IP header for subnet mask, so I'm a
little confused how it would enter the ISP with a particular subnet
mask?
Regards,
Paul
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Vijay babu
Sent: 03 July 2007 09:51
To: ccielab@groupstudy.com
Subject: Re: ip nat pool command
My understanding is...
When the nat pool is defined with
Ip nat pool XYW 1.1.1.1 1.1.1.50 netmask 255.255.255.0
The nated packet leaving your network is give an ip 1.1.1.1 with a
subnet
mask
of 255.255.255.0. This also means the ISP has provided you a 1.1.1.0
(entire
class c)subnet
for your Internet access.
If nat pool is defined with
Ip nat pool XYW 1.1.1.1 1.1.1.50 netmask 255.255.255.128
The nated packet is give an ip 1.1.1.1 with network mask 255.255.255.128
This means your ISP has given you 1.1.1.1 till 1.1.1.126 range of
ip address for your use.
Cheers
Vijay
On 7/3/07, paul.cocker@bt.com <paul.cocker@bt.com> wrote:
>
> Hi All,
>
> I'm a little confused what exactly the netmask command does
>
> Ip nat pool XYW 1.1.1.1 1.1.1.50 netmask 255.255.255.0
>
> How does that differ from
>
> Ip nat pool XYW 1.1.1.1 1.1.1.50 netmask 255.255.255.128 ?
>
> What's the purpose of it?
>
> Regards,
> Paul
>
>
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