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  • Blog Post: DHCP Failover fixes in KB 2919393 for Windows Server 2012 and KB 2919355 for Windows Server 2012 R2

    The following fixes in DHCP Server for Windows Server 2012 have been released as part of Windows rollup update KB 2919393 and for Windows Server 2012 R2 for KB 2919355. Issue no 1: DHCP Failover server issues reserved IP address to a client with a different MAC address This issue pertains to...
  • Blog Post: Windows Server 2012 R2- Enhancing DHCP policies and DNS registrations in DHCP server

    Introduction Windows DHCP server can perform registration of DNS records with the DNS server on the behalf of its clients. Windows Server 2012 R2 enhances this DNS registration functionality in DHCP server. It provides you more flexibility in registering clients with the DNS server. You can now configure...
  • Blog Post: DHCP Failover Load Balance Mode

    As described in the blog on DHCP failover , there are two types of DHCP Failover relations – Load Balance which provides Active-Active configuration and Hot Standby which provides Active-Passive configuration. This blog article elaborates on the Load Balance failover relationship. As is evident...
  • Blog Post: Migrating existing DHCP Server deployment to Windows Server 2012 DHCP Failover

    Introduction This article provides information on how to migrate an existing DHCP server deployment on Windows Server 2008 or Windows Server 2008 R2 to Windows Server 2012 DHCP Failover. DHCP Failover feature requires two Windows Server 2012 on which the DHCP role is installed. To migrate from...
  • Blog Post: Holistic administration of IP address space using Windows Server 2012 IP Address Management

    Introduction DHCP and DNS are widely used Windows Server roles providing the foundation for connectivity in enterprise networks. While DHCP enables the assignment of IP addresses and configuration of hosts on demand, DNS allows Internet names like “www.microsoft.com” to be resolved to...
  • Blog Post: Scope-level Link layer filtering using DHCP Policies in Windows Server 2012

    Introduction Link-layer filtering was a DHCP feature introduced in Windows Server 2008 R2 where one could allow or restrict access to clients based on their MAC address. However the caveat in this feature was that this was possible only at the server level. One of the frequent asks we‘ve had...
  • Blog Post: DHCP policies based on Relay Agent Information Option (option 82), DHCP Snooping and IP Source Guard

    Introduction DHCP server in Windows Server 2012 provides support for provisioning customized IP address and network configurations to DHCP clients using DHCP policies. Policies can be created based on several criteria one of which is relay agent information option - commonly referred as option 82...
  • Blog Post: Automatic syncing of scope configuration changes between 2 DHCP failover servers

    DHCP Failover is a new feature in Windows Server 2012 which provides for high availability of DHCP service. Two DHCP servers in a failover relationship synchronize the IP address lease information on a continual basis there by keeping their respective databases up-to-date with client information and...
  • Blog Post: Installing and Configuring DHCP role on Windows Server 2012

    With the new Server Manager in Windows Server 2012, there have been some changes in the way DHCP role will be installed. The blog post describes, in the sections below, installation and configuration of DHCP Role using Server Manager and PowerShell on Windows Server 2012. Before starting, the user needs...
  • Blog Post: DHCP MAC address Filter management made easy with DHCP PowerShell

    Security and network administrators are increasingly wary of internal security threats, in addition to threats from the outside, due to the introduction of uncertified hardware and software on the network, such as personal portable computers and mobile devices that can be potentially compromised and...
  • Blog Post: Bulk load DHCP Reservations using DHCP PowerShell

    Many organizations deploy DHCP server but choose to have complete control over the IP addresses given out to client computers. This is achieved by reserving an IP address for each client as opposed to letting them acquire a lease dynamically. If you are an admin at one such organization, you could probably...
  • Blog Post: DHCP Failover Hot-Standby Mode

    In the previous blog on DHCP Failover, we discussed the DHCP failover load balance mode where both DHCP servers respond to client requests and load balance the requests between them based on an admin specified load distribution ratio. In the other mode of a failover relationship, known as the Hot...
  • Blog Post: Ensuring High Availability of DHCP using Windows Server 2012 DHCP Failover

    Introduction Ensuring high availability of critical network services like DHCP figures high in the list of priorities for any enterprise. In an environment where clients get their IP addresses and network configuration automatically, uninterrupted network connectivity is dependent on the availability...
  • Blog Post: Setting up DHCP Policies for Virtual Machines

    Introduction With the trend towards private cloud and hosted cloud deployments, the use of virtualization is ubiquitous. This has also increased the need for better control of these virtualized environments with respect to IP address and network configuration provisioning. DHCP policies , a new feature...
  • Blog Post: DHCP Failover supports BOOTP clients in Windows Server 2012 R2

    DHCP Failover is a new feature in Windows Server 2012 which provides for high availability of DHCP service. Two DHCP servers in a failover relationship synchronize the IP address lease information on a continual basis, there by keeping their respective databases up-to-date with client information and...
  • Blog Post: Multi-Site deployment topologies for DHCP Failover

    The two modes of configuring DHCP Failover Load Balance and Hot Standby enables a wide range of deployment topologies involving failover deployment between the DHCP servers present in the same site or spread across multiple sites. The most rudimentary one is the single-site deployment, where both...
  • Blog Post: Using DHCP policies to set different lease durations for different device types

    Introduction An enterprise network has several types of devices – desktops, printers, mobiles, laptops etc. An enterprise administrator would need to ensure that all these different types of device are provisioned appropriately for network connectivity. This requires that they have a valid IP...
  • Blog Post: DHCP Policies using PowerShell

    The DHCP server role in Windows Server® 2012 introduces DHCP Policies also referred as Policy Based Assignment (PBA), a feature that enables users to create policies at scope or server level for assigning IPv4 addresses and options to DHCP clients based on attributes like Vendor Class, User Class...
  • Blog Post: Bringing PowerShell to DHCP Server

    Windows server 2012 comes with PowerShell support for DHCP server role. It provides DHCP administrators a modern, uniform way to manage DHCP servers both locally and remotely, through the command line. These cmdlets get enabled by default when you install DHCP role or DHCP RSAT (Remote Server Administration...
  • Blog Post: DHCP PowerShell Export Import cmdlets in Windows Server 2012

    DHCP PowerShell in Windows Server 2012, in addition to providing cmdlets for DHCP server management, provides cmdlets for exporting ( Export-DhcpServer ) and importing ( Import-DhcpServer ) DHCP Server configuration and IP address lease data. Unlike NetSH.exe export/import functionality which uses binary...
  • Blog Post: DHCP Policies in Windows Server 2012

    Introduction In the recent blogs about DHCP server in Windows Server 2012, we discussed DHCP Failover – a new mechanism for achieving high availability of the Windows DHCP server and DHCP PowerShell – the new command line interface for managing Windows DHCP server. This blog discusses...