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Multi site DHCP/IP issue

By cscott ·
Here's the problem. I have a user who uses DHCP at multiple sites on a Dell Win98se laptop(one at home on the cablemodem, one at work Nt4 server) to obtain an IP address. At home the user has no trouble getting an ip from the cable dhcp. At work he sometimes gets the can't find Domain server and his machine attempts to use his 24.x.x.x ip from his last home connection. The server notices this and issues a nack. I can release this IP and when I renew, the machine successfully picks up an IP fromthe server and all is well. Any thoughts? No other machine on the network is having this problem. Originally I installed a program called Netswitcher that controlled his multiple site IP switching since at work he has mapped drives. For months when this user logged in he would find the domain server just fine but would attempt to use his cablemodem ip as reported by Event Viewer. IPX is also installed at work. Apparently a valid ip would still be issued to him after this invalid ip request and he was none the wiser. Now we have this new issue. A strange issue indeed. Please let me know what other information I can provide to assist in troubleshooting. Thanks.

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Multi site DHCP/IP issue

by Curacao_Dejavu In reply to Multi site DHCP/IP issue

See the MS KB Q229882

When an Internet Connection Sharing (ICS) host computers starts and logs on to the network, client computers may experience a delay in receiving an IP address from the ICS host. Clients may receive the following error message:

DHCP Server Unavailable: Renewing Adapter.


RESOLUTION
To work around this issue, wait 60 seconds after the client receives the "DHCP Server Unavailable" error message, click Start, click Run, type winipcfg, click OK, and then click Renew All.

If the issue persists, refer to the Internet Connection Sharing Troubleshooter on the ICS host computer by clicking Start, clicking Help, clicking the "Troubleshooting" topic, then the "Windows Troubleshooters" topic.


MORE INFORMATION
This issue can occur because of the following behavior: To avoid conflicts with other DHCP servers, the ICS host sends out a DHCP Discover packet at startup and every 60 seconds afterward. ICS DHCP services stop if another DHCP server is located. This delays the ICS host's ability to receive and correctly respond to the clients' Bootp requests.

problem is , he is using that computer as a ics for his other computers at home.

Leopold

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Multi site DHCP/IP issue

by cscott In reply to Multi site DHCP/IP issue

No internet connection sharing at all here. Just two DHCP servers. With the 1st home IP on the machine the computer cannot receive a new ip from the work DHCP server. After it is manually released and renewed it picks up the server and gets an ip.

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Multi site DHCP/IP issue

by ryder007 In reply to Multi site DHCP/IP issue

Hi this I guess is more of a question than a answer, if the user is still logging on as a network client at home perhaps that causes the problem when he brings it back to work because it still has the modem dhcp. Maybe when he turns the comp on at home he should not log on with any password. I'm sorry that it's not much help, but it is a very interesting problem.

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Multi site DHCP/IP issue

by cscott In reply to Multi site DHCP/IP issue

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Multi site DHCP/IP issue

by alciur22 In reply to Multi site DHCP/IP issue

I would set up 2 hardware and user profiles for the laptop. Set all configurations to each profile and when the user logs on at home use the home profile and when at work use the work profile.

AL

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Multi site DHCP/IP issue

by cscott In reply to Multi site DHCP/IP issue

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Multi site DHCP/IP issue

by tlippert In reply to Multi site DHCP/IP issue

Stick another cheap nic in the laptop and use one for the work network and the other for home. If this was win2k you could do this with one nic and two slots. Win2k remembers the ip address based on the slot used.

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Multi site DHCP/IP issue

by cscott In reply to Multi site DHCP/IP issue

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Multi site DHCP/IP issue

by vh_s In reply to Multi site DHCP/IP issue

It is a very interesting problem indeed.

I just couldn't make up why would you use Netswitcher for IP switching. What mapped drives have to do with this ?

Sorry, just need more details to understand your problem correctly..

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Multi site DHCP/IP issue

by cscott In reply to Multi site DHCP/IP issue

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