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DHCP and Client

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by software architect

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I have an NT4.0 Client running DHCP and has been given a 30 day lease. My DHCP server was down and the client pc was unable to contact this server. The client IP stack was dropped after 15 min. Why would the client PC drop the IP stack when its lease was for 30 days? Any help would be appreciated

3 replies

by expertpc

There are 3 ways for a client to drop it's lease;

1. Lease time is up
2. release it through IPCONFIG \release
3. Shutdown and restart the computer

The client normally queries the DHCP server for new leases at 50%, 75%, 87.5%, then 3 times insuccession just before the lease expires if it can not contact a DHCP server. If it cannot contact one it will drop down to APIPA addressing 169.?.x.x.

2 possibilites if none of the 3 things listed above happened:

1. Batch file or shortcut pointing to the IPCONFIG command
2. A pig in Nantucket farted in just such a way.............

You get the point.

Good Hunting!

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