Stop using DHCP

[hulk68]

I have a basic network, all wired.
I have 25 outside traveling co-workers with wireless cards in their laptops.
Their laptops have an alternate ip conf to a 192.168.55.XXX
while my office is a 192.168.50.XXX

I have a "cisco aironet 1200 series access point".
I want it to force the outside guy to connect to the office, but to stay on the .55 subnet.

How do I get the access point to not allow them to use DHCP.

side note- i do not want to go into each laptop and statically assign them a .55, their alternate was setup previously and i want to use that.
so when they go home to their home offices, their original ip address work just fine, without me have to change each one back to its original state.

 

[burtsbees]

You don't want the users to use dhcp to connect, yet you don't want to set static IP's???
Would dhcp work if you configured it to give out IP addresses in the .55 subnet? I am missing something here...

Burt

 

[IllogicallyLogical]

Yes, this does sound rather confusing....you don't want them to use DHCP and you don't want to set up Static IPs? How do you want them to get their IP address then? BOOTP? Do the laptops already have an IP in the in .55 subnet configured as you said "their alternate was setup previously and i want to use that"? Consider setting up a VLAN for the laptop users in the .55 subnet.

Joey
A+, Network+, MCP

 

[Sympology]

Not sure what is possible on this device, but maybe something along the line of this is possible?

Set two scope up. One with the .50 with resevered MAC addresses on DHCP. You must have exactly the correct amount of DHCP addresses available.
Then open up the .55 range.

The hopefully the office ones will get the reserved addresses and other the free addresses. You may have to somehow bar the .50 ones from the .55 range if that is possible.

Stu..

Only the truly stupid believe they know everything.
Stu.. 2004

 

[hulk68]

Maybe i can clear things up, sorry for the confusion...

Outside co-workers, in their home offices, in other states, have whatever ip configuraton they need to get internet access from their local providers. Some have dhcp, some have a static ip. When they got these laptops 2 yrs ago,from my company, they were all given an alternate ip on the .55 subnet, all unique and different, for their wireless cards.

so now when they come back to the main office, for one week only, i want my wireless device(cisco aironet 1200) to make them use the .55 subnet. right now i have the device working just fine, but it gives them a DHCP address on the .50 subnet.

giving them a dhcp on the .55 would be fine, if i knew how.
settting up a vlan would be fine, if i knew how.

when i stated i didnt want to use a static ip before, i meant that i didnt want to logon as a admin into each and every laptop, change their wireless card to a static ip, let them work for the week and then have to change it back to their original wireless ip address they came in with. basically many of them have wireless at home and all have different setups for ip addresses.

i just want the access point to either give them dhcp on the .55 or force them to use their alternate ip which is already stored on their wireless configuration.

So...
I dont want to change any ip addressing on their laptops.
i dont even wan to touch their laptops.
I really want to configure my cisco aironet device to get these laptops on the .55
how do i turn off the dhcp for the .50 on the cisco aironet device?
how do i turn on dhcp on the .55 subnet?
how do i setup a vlan with this device?

I hope this clears up what i am trying to accomplish.
thank you for the help so far!

 

[burtsbees]

Well, setting up the dhcp scope to .55.x is what you want... I don't think that this provides DHCP services---I think the laptops are getting the DHCP configs from somewhere else. However, I will provide a setup guide for you, but first you must know the version of IOS you have---get to the CLI by using a rollover cable with the RJ45 end plugged into the console port of the 1200, and the other end (should be DB-9) into the serial port of a laptop or a nearby desktop. Open Hyper Terminal (in Windows) or a terminal emulation program of your choice and connect to COM1. Settings are 9600 baud, 8 data bits, no parity, one stop bit and no flow control. Or, if you know the IP address of it, then you can telnet to it.
You should be at the > prompt. Whatever the device name is will be before the >, so let's call it 1200...
1200>
then do these commands...
1200>en
the prompt will change to #
1200#sh ver
This will give the version of IOS (Internetworking Operating System) you have loaded. From there, you can follow the directions from this link...

http://www.cisco.com/en/US/products...stallation_and_configuration_guides_list.html

It looks like the aironet cannot be configured as a DHCP server, so go to a laptop and do an ipconfig /all to see what is serving the DHCP for your network, like it could be the gateway. If you know the IP address if the aironet, then just type that into the browser. There should be a GUI available for you.
For VLANs to be configured, they must also be configured on the network switches. This could be more than what you want.

Burt