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8.3

Cisco to Microsoft DHCP

Asked by ISD622 in Dynamic Host Configuration Protocol (DHCP), Windows 2003 Server, Network Routers

Tags: cisco, server 2003, dhcp

I'll keep our problems description simple at first.  Ask questions and I'll try to add more.

We have 2 core 4510s, which feed via fiber other buildings, their cores are 3750s, these are either stacked or fiber connected to other 3750s or 3560s.

Originally the core 3750s were configured to hand out DHCP.  Because of a network access appliance we were forced to go central on our DHCP, so we started up 2 Microsoft DHCP server.  This has been set up with a single Superscope and 50 scopes underneath.  Each scope has a single class C pool, server options include:  Router, DNS Servers, DNS name, and WINS.  The Cisco Switches have had the DHCP removed and IP helper statements have been added to the port configs.

Let me add, all Windows XP SP3 shop.  Here is the issue.  Now when a user moves from one scope to another, the PC will not let go of their address.  A simple /release /renew will not do anything, Deleting the DHCP entry won't do anything, removing the DNS records will not do anything.  The only Event view that I get that may mean anything is:  

Event Type: Error
Event Source: Dhcp
Event Category: None
Event ID: 1002
Date:  1/8/2009
Time:  9:24:12 AM
User:  N/A
Computer: ISD622-784F7B37
Description:
The IP address lease 192.168.11.23 for the Network Card with network address 0000F08504FB has been denied by the DHCP server 10.1.21.1 (The DHCP Server sent a DHCPNACK message).

This would be an example of the PC moving from the .11.X scope to the .21.X scope.  The 10.1.21.1 server it's referring to was the Cisco 3750 that used to dole out addresses, now all commands have been removed and the switch rebooted.

Ideas??
Shane
[+][-]01/08/09 11:30 AM, ID: 23329055Expert Comment

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[+][-]01/08/09 11:32 AM, ID: 23329075Expert Comment

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[+][-]01/08/09 11:32 AM, ID: 23329080Expert Comment

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[+][-]01/08/09 01:01 PM, ID: 23330138Author Comment

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[+][-]01/08/09 01:18 PM, ID: 23330353Expert Comment

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[+][-]01/09/09 10:48 AM, ID: 23338866Accepted Solution

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About this solution

Zones: Dynamic Host Configuration Protocol (DHCP), Windows 2003 Server, Network Routers
Tags: cisco, server 2003, dhcp
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Solution Provided By: ged125
Participating Experts: 3
Solution Grade: A
 
 
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