Can I replace a router and DHCP server without disrupting traffic?

Posted by SRobertJames on Server Fault See other posts from Server Fault or by SRobertJames
Published on 2011-01-16T04:41:37Z Indexed on 2011/01/16 4:54 UTC
Read the original article Hit count: 245

Filed under:

Windows

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networking

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cisco

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dhcp

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high-availability

I have a device which acts as a router and DHCP server. I'm replacing it, and would like to minimize down time.

If I unplug it, and plug in a different device with the same IP, will all the PCs with DHCP leases keep on working? (I have DHCP Conflict detect on, so it shouldn't reassign a DHCP address already used).
What if I want to change the IP (new subnet) - is there anyway to tell all the clients (Windows PCs) to release their DHCP leases and request new ones in a minute?
If before unplugging the old device, I have it release all DHCP leases, will the Windows PCs automatically ask for new DHCP addresses?

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