Resolved DHCP Lease Renewal and Screen Saver Mode

I have a laptop that I need to access remotely. It has been giving me fits because it seems to lose its IP address or at least its dynamic DNS entry. I suspect it has to do with renewing its DHCP lease. When this happens and I wake the computer locally, the DNS entry suddenly reappears. After some testing, this condition seems to coincide with the DHCP lease expiration while the laptop is in screen saver mode. I have the laptop in a docking station so I've set it to never sleep and I have it set to wake when accessed via remote desktop. All that seems to work until the DHCP lease expires. So I think the question is how do I configure this thing, if possible, to wake and renew its DHCP lease? TIA.

 

Why don't give it a static IP ?

 

Not my decision to make. In any case that suggestion does not answer my question.

 

Is this laptop used in home or office ? Office issues can be very hard to pinpoint as the IT administrator may have applied some restrictions.

 

I understand the lease time is controlled by the DHCP server but if/when it is renewed at expiration time is controlled by the laptop. When the lease expires, is not another broadcast sent by the laptop and a new lease sent by the server? I'm thinking the solution is to create a scheduled task that does a ping or something every couple of hours to force a renewal.

 

None of these suggestions seem to work. I am thinking now that it may be a problem with the DNS/DHCP server.

 

I think Tony stated it correctly--IP leasing is from the router. the host, your laptop, goes through four states--discovery (looking for an IP dhcp server) offer ( the Ip server offers an IP address) request (the host requests that IP address from whatever dhcp server is online--you can have many, not just one) acknowlegement (there's an agreement that the host will use that IP address) After that, the host sends out a broadcast making sure it ain't stealing somebody else's IP address

I would go with static addressing also, but your problem seems kind of weird to me also.. On a local LAN, MAC addressing actually rules, so getting a mac address entry into the router's client list might help your problem

 

I think I figured this out. There is a GPO that is supposed to send the IP address to the DynDNS server. That is not happening when a lease is renewed so the host name entry for the laptop is getting flushed but never renewed.