W2000 Network Addressing to PLCs

Hello,
I'm planning to connect a W2000 PC to an industrial PLC network (Allen Bradley) for the first time and would like it to work :-). We will be
communicating between our VB program, a Kepware Server and the PLCs. Just have 3 questions:
Info received from plant for the W2000 node: IP Address: 172.16.206.156, Subnet Mask: 255.255.255.0, Getway: 172.16.206.11.
Question 1: Shouldn't the subnet mask be 255.255.0.0 or can it be 255.255.255.0? Question 2: Do I need an address for a DNS? Question 3? What about the domain name - is it necessary?
In other words, can I just enter the three numbers above and the network will recognize me without concern for DNS, domain name, etc.
Many thanks!
Ernie Adsett AMT Inc.
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If the person in the plant responsible for the network is telling you to set the IP , Default Gateway, and the Sub Net Mask to the numbers that he gave you, that's what I would do if you want it to work. As far as the sub net mask being 255.255.0.0 for a 172.16.x.x net working, that is the default mask but that can be customized. A 255.255.255.0 subnet mask on a 172.16.x.x network would give you more Network ID's with fewer computers on each of them. And last an ip of 172.16.x.x is a private ip address that is not usable on the internet, so I don't think you need to worry about a DOMAIN NAME or DNS, unless they are using it on there own private network and if they are the plant computer guy would have told you an DNS address.

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This is a multi-part message in MIME format. --------------030807010003060805000107 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit
Thanks, Gino. You've been a good help - will be giving it a go tomorrow.
Ernie ***********************************
Gino wrote:

</pre> <blockquote type="cite"> <pre wrap="">Hello,
I'm planning to connect a W2000 PC to an industrial PLC network (Allen Bradley) for the first time and would like it to work :-). We will be communicating between our VB program, a Kepware Server and the PLCs. Just have 3 questions:
Info received from plant for the W2000 node: IP Address: 172.16.206.156, Subnet Mask: 255.255.255.0, Getway: 172.16.206.11.
Question 1: Shouldn't the subnet mask be 255.255.0.0 or can it be 255.255.255.0? Question 2: Do I need an address for a DNS? Question 3? What about the domain name - is it necessary?
In other words, can I just enter the three numbers above and the network will recognize me without concern for DNS, domain name, etc.
Many thanks!
Ernie Adsett AMT Inc.
</pre> </blockquote> <pre wrap=""><!---->
</pre> </blockquote> </body> </html>
--------------030807010003060805000107--
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Just the question do 172.16.206.11 is local IP ( after some firewall / NAT ) or that ip in internet ? did ping -a 172.16.206.11 show really that one ? Arkady

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Under RFC #1918 the IP range 172.16.0.0 to 172.31.255.255 is a private address range set aside by the Internet group IANA. They will not work on the internet.

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