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Windows Server 2012 – Networking optimizations

25 October 2012
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Reading Time: < 1 minuteNetwork tuning and offload Performance Tuning Guidelines for Windows Server 2012 (DOC) Network Subsystem Performance Tuning Networking Adapter Performance Guidelines (on Windows Server 2008 R2, but still good) Specific technologies Registered I/O Networking Extensions (RIO): Microsoft site, alternative site Virtual Machine Queue (VMQ) IPsec Task Offload Single Root I/O Virtualization (SR-IOV): Overview of Single Root I/O Virtualization (SR-IOV), What is SR-IOV? (Scott Lowe’s Blog), PCI SIG Specifications Windows Server 2012 Hyper-V & Data Centre Bridging (DCB)

Microsoft, vNetworking , ,

Issue in VM migration: MAC Address may change

22 August 2012
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Reading Time: 2 minutesRecently I got a strange issue using a cold storage migration usign the Migrate function of vCenter Server. This was the scenario: a Free Hypervisor with some VMs where a full license (Essential Plus) was added and the host was also added to a vCenter Server. For compatibility matrix reason the version 4.1 was used (although the storage can work with vSphere 5.0 but officially was not supported). Also the Free Hypervisor was build with the 4.0 version and upgraded (one year ago) to the 4.1 version. This was the issue: after a cold storage […]

VMware, vNetworking none

Manage a network load balancer with System Center VMM 2012

Reading Time: < 1 minuteIn the fabric section of System Center VMM 2012 is also possible add external hardware network load balancers and manage, in a similar way as a storage array can be added and managed. But in this case there isn’t a standard interface to remote manage the devices and each vendor must make available a supported “provider” that is just the management software part for the integration with VMM. Actually the supported devices are:

Microsoft, vNetworking ,

VCP5 Exam Prep – Part 6.2

21 September 2011
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Reading Time: 2 minutesFor a list of all objectives see the VCP5 page. Objective 6.2 – Perform Basic vSphere Network Troubleshooting Verify network configuration (same as vSphere 4.x) See VMware Virtual Networking Concepts for basic concepts for standard virtual switches. See Objective 2.2 – Configure vNetwork Distributed Switches for distributed virtual switches. Verify a given virtual machine is configured with the correct network resources (same as vSphere 4.x) See VMware KB: Troubleshooting virtual machine network connection issues and http://damiankarlson.com/vcap-dca4-exam/objective-6-3-troubleshoot-network-performance-and-connectivity/ Troubleshoot virtual switch and port group configuration issues (same as vSphere 4.x) Use previous links. For vmkernel porgroup vmkping […]

vCertification, VMware, vNetworking ,

VCP5 Exam Prep – Part 2.3

11 August 2011
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Reading Time: 3 minutesObjective 2.3 – Configure vSS and vDS Policies See also those similar posts: Objective 2.3 – Configure vSS and VDS Policies and Objective 2.3 – Configure vSS and vDS Policies Identify common vSS and vDS policies (similar as vSphere 4.x) See the vSphere Networking Guide (page 43). Policies set at the standard switch or distributed port group level apply to all of the port groups on the standard switch or to ports in the distributed port group. The exceptions are the configuration options that are overridden at the standard port group or distributed port level. The blueprint […]

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VCP5 Exam Prep – Part 2.2

10 August 2011
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Reading Time: 2 minutesObjective 2.2 – Configure vNetwork Distributed Switches See also this similar post: Objective 2.2 – Configure vNetwork Distributed Switches and Objective 2.2 – Configure vNetwork Distributed Switches Identify vNetwork Distributed Switch capabilities (similar as vSphere 4.1) Official page with features of vDS: Improves visibility into virtual machine traffic through Netflow (New in vDS 5) Enhances monitoring and troubleshooting using SPAN and LLDP (New in vDS 5) Enables the new Network I/O Control (NIOC) feature (now utilizing per VM controls) (New in vDS 5) Simplified provisioning and administration of virtual networking across many hosts and clusters through […]

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VCP5 Exam Prep – Part 2.1

9 August 2011
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Reading Time: 2 minutesObjective 2.1 – Configure vNetwork Standard Switches See also those similar posts: Objective 2.1 – Configure vNetwork Standard Switches e Objective 2.1 – Configure vNetwork Standard Switches and Objective 2.1 – Configure vNetwork Standard Switches. Identify vNetwork Standard Switch capabilities (same as vSphere 4.x) See: VMware Virtual Networking Concepts and VMware Virtual Networking. Create/Delete a vNetwork Standard Switch (similar as vSphere 4.x) See the vSphere Networking Guide. No need to know the CLI… Note that now also from the GUI the vSwitch MTU can be changed. Add/Configure/Remove vmnics on a vNetwork Standard Switch (same as […]

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