IP Addressing

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Guest

Hello to all,

Just need clarification.

A company have been given two static ip addresses for their two computers
i.e. 87.127.173.225 and 87.127.173.226

Would you agree that I can put the following ip addressing on their XP PCs
as follows:-

ip address 87.127.173.225
subnet mask 255.255.255.0
default gateway 87.127.173.1 (I would change the LAN side of the router to
this)

DNS (whatever it is)


Or does the subnet mask have to be 255.0.0.0?

Many kind regards and thanks for all your help,
Jeff
 
jeffuk123 said:
Hello to all,

Just need clarification.

A company have been given two static ip addresses for their two computers
i.e. 87.127.173.225 and 87.127.173.226

Would you agree that I can put the following ip addressing on their XP PCs
as follows:-

ip address 87.127.173.225
subnet mask 255.255.255.0
default gateway 87.127.173.1 (I would change the LAN side of the router
to
this)

DNS (whatever it is)


Or does the subnet mask have to be 255.0.0.0?

Many kind regards and thanks for all your help,
Jeff
Click to expand...

An IP beginning with 87. is a Class A IP and needs a subnet mask of
255.0.0.0

For information:
Class A 1.0.0.0 to 126.255.255.255
Class B 128.0.0.1 to 191.255.255.255
Class C 192.0.0.0 to 223.255.255.255

Subnet Masks
Class A 255.0.0.0
Class B 255.255.0.0
Class C 255.255.255.0

Hope that helps,
Steve
 
"Maincat" said:
An IP beginning with 87. is a Class A IP and needs a subnet mask of
255.0.0.0

For information:
Class A 1.0.0.0 to 126.255.255.255
Class B 128.0.0.1 to 191.255.255.255
Class C 192.0.0.0 to 223.255.255.255

Subnet Masks
Class A 255.0.0.0
Class B 255.255.0.0
Class C 255.255.255.0

Hope that helps,
Steve
Click to expand...

This network is a small part of a class A subnet, not an entire Class
A subnet, so it doesn't need a Class A subnet mask. A subnet mask of
255.255.255.0 covers all of the specified addresses.

Using a mask of 255.0.0.0 could block access to some Internet sites.
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com
 
Hello to all,

Just need clarification.

A company have been given two static ip addresses for their two computers
i.e. 87.127.173.225 and 87.127.173.226

Would you agree that I can put the following ip addressing on their XP PCs
as follows:-

ip address 87.127.173.225
subnet mask 255.255.255.0
default gateway 87.127.173.1 (I would change the LAN side of the router to
this)

DNS (whatever it is)


Or does the subnet mask have to be 255.0.0.0?

Many kind regards and thanks for all your help,
Jeff
Click to expand...

Was that default gateway assigned by their ISP?

If so, the subnet includes IP addresses 87.127.173.x, where x is
between 1 and 226. That indicates a subnet mask of 255.255.255.0.

I don't see why they're using a router when they have public IP
addresses. A router's purpose is to share one public IP address
between multiple computers that have private IP addresses. I'd think
that the network should use a switch, not a router.

In any event, I recommend consulting with their ISP for recommended
hardware and settings.
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com
 
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