Can't renew IP address between office and home

[Gary]

Hi,

My Dell Latitude is running Win2k Server. I have vanilla DHCP set up to
retrieve all settings from the DHCP server. I run a Linksys 4 port hub at
home and a windows DHCP server at the office. I go into my laptop's standby
mode and reconnect when I switch locations. This was working fine for many
months, but recently I've found that I need to restart my laptop to get
Windows to find the new DHCP server.

I've run into this in past so I purposely set up the gateway at home to be
in a different IP range than my office, thinking this might help. One
gateway is 172.16.16.1 and the other is 192.168.168.1. When I am unable to
get a connection, I've tried using ipconfig /release and\or /renew, but the
program never responds. I have to break (CTRL-C) it. If I try to ping the
gateway, it returns with "destination host unreachable". Is there any way to
get windows to refresh itself and look for the new gateway, as if I had
restarted the machine? I've tried disabling the network connection and then
enabling it. I've looked at the NET and ROUTE utilities, but nothing seems
to help. I'm thinking I might try listing both gateways in the Advanced
TCP/IP settings, but I don't know if this will work because I haven't had to
list anything in the past. Any ideas or settings I should look at?

Thanks!
Gary

 

[Vanguard]

The DHCP-assigned IP address you had at work might not work when you
come in from home (you're seen as a different user trying to use an IP
address already assigned to someone else). Release your DHCP-assigned
IP address and request a new one. From a DOS shell, run:

ipconfig /release *
ipconfig /flushdns
ipconfig /renew

The client-side DNS cache flush may not be necessary but there are times
when it is so it doesn't hurt to include it. If this happens a lot,
create a .bat file with a shortcut to it in your Start menu, QuickLaunch
bar, or on the desktop to do it quickly and easily.

 

[Gary]

Unfortunately, I have tried this and it does not work. When I try /renew,
the ipconfig program never responds. I have to CTRL-C out of it.


The DHCP-assigned IP address you had at work might not work when you
come in from home (you're seen as a different user trying to use an IP
address already assigned to someone else). Release your DHCP-assigned
IP address and request a new one. From a DOS shell, run:

ipconfig /release *
ipconfig /flushdns
ipconfig /renew

The client-side DNS cache flush may not be necessary but there are times
when it is so it doesn't hurt to include it. If this happens a lot,
create a .bat file with a shortcut to it in your Start menu, QuickLaunch
bar, or on the desktop to do it quickly and easily.

 

[Vanguard]

Hmm, maybe it's trying to use the same DHCP at work (which is
unreachable) when you are at home. Might a reset on the interface work?

netsh int reset all