Matthew, No, your DHCP server will dish out the correct IP address by scope. The router has a DHCP helper address which will forward it to the DHCP server. The DHCP server will see what subnet the request came from, and give out a lease for an IP address of the scope assigned to that subnet. For example:
10.20.x.x/16 10.21.x.x/16 Chris Bodnar, MCSE Sr. Systems Engineer Distributed Systems Service Delivery - Intel Services Guardian Life Insurance Company of America Email: [email protected] Phone: 610-807-6459 Fax: 610-807-6003 -----Original Message----- From: Matthew W. Ross [mailto:[email protected]] Sent: Thursday, July 23, 2009 1:38 PM To: NT System Admin Issues Subject: DHCP and multiple Subnets; Multiple DHCP server or DHCP-Relays? Hey list. Since nobody had a good network mailing list, I'll as my question here. We have a large flat network which I'm looking at splitting up. It was 10.x.x.x/8, looking to bring it to several 10.20.x.x/16s. I've got my configuration of the router figured out, except DHCP. We statically assign our IPs to individual machines... but I don't see how that's possible with a routed network like this... especially for mobile users who move across subnets from time to time. I could install a DHCP server for each subnet, but this could be tedious. Using my switch's DHCP-Relay seems like a good idea, but if a user moves to a different subnet, won't that user get an invalid IP address? Any other ideas on how to get past this? --Matt Ross Ephrata School District ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ ----------------------------------------- This message, and any attachments to it, may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are notified that any use, dissemination, distribution, copying, or communication of this message is strictly prohibited. If you have received this message in error, please notify the sender immediately by return e-mail and delete the message and any attachments. Thank you. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
