Subnetting Problem - Pls HELP?

[Wide Angle]

Hi Guys,

I have successfully subnetted our small company with the following details

Ground floor - 10.10.4.x
First floor - 10.10.5.x
Second floor - 10.10.6.x
Thrid floor - 10.10.7.x

So far its all working. but I noticed that when I brought the computer from Third floor to Ground floor with the IP of 10.10.7.x and connect to my lan, IT DOES NOT WORK.

Question: Is this normal or I have to do something which I missed.

Please advice.

Thanks

[Swordfish]

what subnet mask is it 255.255.255.0?

did you change the ip address of the machine to be on the proper subnet?

You said the ground floor was on subnet 10.10.4.x...so you will have to change the ip address of the system to reflect the proper subnet.

when you said you are connecting the third floor system to the ground floor lan, did you mean on the 10.10.4.x subnet?

change the ip address to any of the unused ones from the range 10.10.4.1 to 10.10.4.254.

I am assuming here you are using the S.M--255.255.255.0

[Wide Angle]

thanks for your reply.

I know that whenever I move the computer to another subnet, I have to change the IP address accordingly.

My question : Is there a way that the computer will work on other floor without changing the IP base on that partucular floor? Or it is necessary to change?

thanks once again.

[Swordfish]

may be you need a DHCP server in your lan that automatically assigns ip address to a pc from a range....in that case you don't need to assign manually the ip addresses when moving around subnets.

http://www.dhcp-handbook.com/dhcp_faq.html

[Wide Angle]

Thanks a lot Swordfish for your very
informative reply.

Best Regards and God bless,

Henry

[Sterling_Aug]

If your network contains only hubs, then get a router/server and set up DHCP.

If your network contains only switches, then eliminate ALL of the IP addresses and forget about subnetting. You are making more work than necessary keeping track of the IP addresses. Switches reduce the network traffic automatically while hubs DO NOT.

[Wide Angle]

Hi Sterling,

thanks for your post.

What do you mean by if Im using SWITCHES, forget IP addresses and Subnetting? Could you please give me a short detail - Im interested of what you said.

Im using SWITCHES.

thanks and waiting for your informative reply.

Best Regards,

Henry

[omendata]

Its called segmenting your collision domains.

Switches learn which port each ip address is on (mac actually)

Try using vlans and trunk your switches if you have Cisco equipment - makes life so much easier.

[Midknyte]

why aren't you using DHCP? for class A, you should have way more than enough IPs to go around. The management overhead of static IPs will just waste your time.