Reading/configuring the DHCP NAP server fragility settings.

The DHCP NAP enabled server (Longhorn server) tries to reach the NPS server to get a response on the client health state to enforce the appropriate policy on the client. But at times ,when the NPS server is not reachable, the DHCP server needs to decide what policy needs to be enforced on the client….

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How to duplicate reservations from one server to another?

The problematic scenario is the following: There are two DHCP servers serving the same set of subnets. For each of the subnets which is being served by both the servers there are two scopes one for each server. The scopes are configured in a way that the active address range in one is in the…

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How to find out all the active clients serviced by your DHCP server

In this post, I am going to discuss about the various ways by which you can enumerate all the client leases of the DHCP server. The reasons why you might want to do this can be many: You might want to do this when we want to have a single list of all clients your…

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How to set DHCP scope lease time through netsh?

In this post, I am going to talk about how to set the lease time for a given scope in the DHCP server through netsh command-line. The command is a little unintuitive considering the fact that you won’t be mentioning anything about lease time in the command itself. The fact that you are updating the…

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Manage your server from your desktop!

In this post, I am going to talk about an interesting way to manage your Windows Servers. One of the things that would certainly be a good thing to have is the freedom to use your desktop environment to monitor and configure your servers. The advantages of the above method are the following: 1)      General…

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What it takes to get a lease………

Hi all, I found this pretty useful content in one of our internal DL’s. I thought it should be available more widely. The following describes what it takes to get a address lease from the DHCP client. It describes the various steps taken by the DHCP client in various circumstances. 1. The DHCP client requests…

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Follow-up article on how to set lease times through netsh.

Question: I have a customer that has 5 DHCP servers that host many scopes. The customer wants to know of a way to script changing the lease duration on the advanced page of the properties of the scope (because they also have Bootp clients). Anybody have any ideas on how to script this change? netsh…

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Windows 2003 SP1 DHCP export/import netsh commands failure on IA64 platform

Hi all, This post is regarding an issue that plagues the Windows Server 2003 SP1 on Itanium 64 platforms. The problem is that the netsh export/import commands fail on these cases with the following error: DHCP Server import and export are allowed on local servers only.DHCP Server export failed. There is a simple work arround for…

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About "Default Routing and Remote Access Class"

The following is a question i received from one of the internal groups and my answer to the same. I hope you find the information usefull. Question: I am trying to configure options to be applied specifically to workstations that make a vpn connection. The workstations appear to get all options that are set on the…

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How to override the system default for the threshold for the event 1020.

  Question: How can I change the threshold value for firing of event 1020. Event 1020 fired by the DHCP server is fired whenever the amount of free addresses in a scope is less than 80%. E.g: Event Type:     Warning Event Source:   DhcpServer Event Category: None Event ID:       1020…

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