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  • Blog Post: Hyper-V Replica Certificate based authentication and Proxy servers

    Continuing from where we left off , I have a small lab deployment which consists of a AD, DNS, Proxy server (Forefront TMG 2010 on WS 2008 R2 SP1), primary servers and replica servers. When the primary server is behind the proxy (forward proxy) and when I tried to enable replication using certificate...
  • Blog Post: Error 0x80090303 when enabling replication

    When trying to enable replication on one of my VMs in my lab setup, I encountered the following error – Hyper-V failed to authenticate the Replica server <server name> using Kerberos authentication. Error: The specified target is unknown or unreachable (0x80090303). Needless to say, I was able...
  • Blog Post: Hyper-V Replica & Proxy Servers on primary site

    I was tinkering around with my lab setup which consists of a domain, proxy server, primary and replica servers. There are some gotchas when it comes to Hyper-V Replica and proxy servers and I realized that we did not have any posts around this. So here goes. If the primary server is behind a proxy server...
  • Blog Post: Hyper-V Replica Capacity Planner

    Customers have frequently asked us for capacity planning guidance before deploying Hyper-V Replica – e.g.: “How much network bandwidth is required between the primary and replica site”, “How much storage is required on the primary and replica site”, “What is the storage impact by enabling multiple recovery...
  • Blog Post: Hyper-V Replica Runbooks

    System Center 2012 Orchestrator provides a powerful workflow management solution which allows IT administrators to automate different tasks exposed by the platform. At the heart of the Orchestrator is a set of Runbooks which outline the sequence of activities for a given task. A number of resources are...
  • Blog Post: Hyper-V Replica Kerberos Error

    David is one of our Premier Field Engineers and he approached us with an interesting problem where the customer was encountering a Kerberos error when trying to create a replication relationship. On first glance, the setup looked very straight forward and all our standard debugging steps did not reveal...
  • Blog Post: Hyper-V Replica–Certificate Based Authentication in Windows Server 2012

    This post discusses a subtle change in the certificate workflow for Hyper-V Replica in Windows Server 2012 Release Candidate build and beyond. Note : The pre-requisites certificate based authentication remains unchanged (as seen in an earlier post “ Hyper-V Replica - Prerequisites for...
  • Blog Post: Network Recommendations for a Hyper-V Cluster in Windows Server 2012

    We recently published a TechNet document http://technet.microsoft.com/library/dn550728.aspx which provides guidance on configuring your network for a Hyper-V Cluster in Windows Server 2012. A snip of the summary from the document: Windows Server 2012 supports the concept of converged networking, where...
  • Blog Post: Measuring Replication Health in a cluster

    As part of running a mini-scale run in my lab, I had to frequently monitor the replication health and also note down the replication statistics. The statistics is available by by right clicking on the VM (in the Hyper-V Manager or Failover Cluster Manager) and choosing the Replication submenu and clicking...
  • Blog Post: Upgrading to Windows Server 2012 R2 with Hyper-V Replica

    The TechNet article http://technet.microsoft.com/en-us/library/dn486799.aspx provides detailed guidance on migrating Hyper-V VMs from a Windows Server 2012 deployment to a Windows Server 2012 R2 deployment. http://technet.microsoft.com/en-us/library/dn486792.aspx calls out the various VM migration...
  • Blog Post: What’s new in Hyper-V Replica in Windows Server 2012 R2

    18th October 2013 marked the General Availability of Windows Server 2012 R2. The teams have accomplished an amazing set of features in this short release cycle and Brad’s post @ http://blogs.technet.com/b/in_the_cloud/archive/2013/10/18/today-is-the-ga-for-the-cloud-os.aspx captures the investments...
  • Blog Post: Replica Clusters behind a NAT

    When a Hyper-V Replica Broker is configured in your DR site to accept replication traffic, Hyper-V along with Failover Clustering intelligently percolates these settings to all the nodes of the clusters. A network listener is started in each node of the cluster on the configured port.   While this...
  • Blog Post: Hyper-V Replica BPA Rules

    A frequent question from our customers is on whether there are standard “best practices” when deploying Hyper-V Replica (or any Windows Server role for that matter). These questions come in many avatars - Does the Product Group have any configuration gotchas based on internal testing, is my server properly...
  • Blog Post: Hyper-V Replica Certificate Based Authentication - makecert

    We have had a number of queries on how to enable replication using certificates created from makecert. Though the Understanding and Troubleshooting guide for Hyper-V Replica discusses this aspect, I am posting a separate article on this. The below steps are applicable for a simple lab deployment consisting...
  • Blog Post: Multi-tenant disaster recover solution using Windows Server 2012

    Windows Server 2012 introduces fundamental improvements that make it a cloud-ready operating system. The capabilities provide a flexible and scalable solution which opens up a wide range of opportunities for hosting providers to build new cloud services. This blog post is co-authored by Uma Mahesh...
  • Blog Post: Hyper-V Replica and Riverbed

    As part of setting up a replication relationship, Hyper-V Replica transfers the initial VHDs over the network – depending on the size of the VHD, this operation can be time consuming and also impacts your production network. Once initial replication is completed, Hyper-V Replica tracks the changes to...
  • Blog Post: Hyper-V Replica Powershell Series: Creating Hyper-V Replica Broker

    We have seen multiple queries on the steps required to create the Hyper-V Replica Broker using Powershell, a previous post describes the process but adding more details on the end to end workflow. To create a Hyper-V Replica Broker in a DHCP environment, use the following cmdlets: 1: #Specify the name...
  • Blog Post: Requesting Hyper-V Replica Certificates from an Enterprise CA

    In an earlier post , we discussed the steps required to get a certificate from a Standalone CA or from a third party CA. For an Enterprise CA , the INF file needs to be modified and suitable templates need to be available to honor the certificate request. To make things interesting, the post is written...
  • Blog Post: Hyper-V Replica Authorization entries–Windows Server 2012

    While the concept of an “Authorization table” remains the same between Windows Server “8” Beta (as explained in an earlier post ) and Windows Server 2012 RC, we have made some changes in the PowerShell cmdlet and UI surrounding this. The phrase ‘Security Tag’ in...
  • Blog Post: Requesting Hyper-V Replica certificates from a CA

    The certificate requirements for Hyper-V Replica were discussed earlier – this post provides details on how to request a certificate from a Certification Authority (CA), which can then be used for Hyper-V Replica for certificate based authentication. Step #1: Create an INF file Copy-paste the text below...
  • Blog Post: Interpreting Replication Health - Part 2

    Continuing from where we left off the last time … Q1: The Replication Health pane has loads of information, how do I interpret these attributes? I thought you would never ask On both the Primary and Replica VM, the following attributes are displayed...
  • Blog Post: Interpreting Replication Health – Part 1

    In Windows Server 2012 Release Candidate, Hyper-V administrators can monitor the ‘health’ of the replicating VMs using the Replication Health attribute . This property allows administrators to answer common questions such as: When did the primary and replica VMs last synchronize...
  • Blog Post: TechEd North America 2012

    Posting this on behalf of Jeff Woolsey who delivered an amazing demo in the Day 1 Keynote address by Satya Nadella. The video is available here and the transcript for the keynote address is available here .   Some key takeaways from Jeff's presentation: 64 virtual processors in a VM 985,000 IOPs...
  • Blog Post: Inject IP address into the VM during failover

    Hyper-V Replica reduces the Recovery Time Objective (RTO) providing the ability to configure the static IP address of the Replica VM before it is failed over. This IP address setting is injected into the failed over VM. This post written by Vinod Atal who is one of the developers in the Hyper-V team...
  • Blog Post: Enable replication using certificate based authentication - in PowerShell

    Update in July 2012: This post is applicable only if you on Windows Server "8" Beta. For Windows Server 2012 RC and later, refer to the updated blog post @ http://blogs.technet.com/b/virtualization/archive/2012/07/16/hyper-v-replica-certificate-based-authentication-in-windows-server-2012-rc.aspx ...