module 4
DESCRIPTION
Module 4. Creating and Configuring Virtual Machine Networks. Module Overview. Creating and Using Hyper-V Virtual SwitchesAdvanced Hyper-V Networking FeaturesConfiguring and Using Hyper-V Network Virtualization. Lesson 1: Creating and Using Hyper-V Virtual Switches. - PowerPoint PPT PresentationTRANSCRIPT
Microsoft Virtual AcademyModule 4
Creating and Configuring Virtual Machine Networks
Module Overview
Creating and Using Hyper-V Virtual SwitchesAdvanced Hyper-V Networking Features•Configuring and Using Hyper-V Network Virtualization
Lesson 1: Creating and Using Hyper-V Virtual SwitchesOverview of the Hyper-V Virtual SwitchTypes of Virtual Switches•What Is VLAN Tagging?
Overview of the Hyper-V Virtual Switch• Software implemented layer two switch• Connects virtual machines to virtual and
physical networks• Parent partition is also A virtual machine
• Extensible, has advanced features, can be replaced• Policy enforcement, isolation, traffic shaping,
protection• Managed by Hyper-V Manager and
Windows PowerShell• Get-VMSwitch
• Parent partition can have multiple virtual NICs• Can be connected to different virtual switches• Can have different bandwidth limitations
Compares withVMware vSwitch (Not VDS)
Overview of the Hyper-V Virtual Switch
Overview of the Hyper-V Virtual Switch
Overview of the Hyper-V Virtual Switch
Types of Virtual Switches•Parent has physical network adapter(s)• Each virtual machine (and parent) has virtual network adapter(s)• Each virtual network adapter is connected to a virtual switch
•Type of virtual switch is:• External – connects to a physical or wireless adapter• Internal – parent and virtual machine connections only• Private – virtual machine connections only
•Configuration• Use Virtual Switch Manager to create virtual switches• Use virtual machine settings to connect a virtual network adapter to a switch
Types of Virtual Switches
- Physical network adapter- Virtual network adapter- Virtual switch
ParentApp
Virtual machine App Virtual
machineApp
ParentApp
Virtual machine App Virtual
machine App
Private
ParentApp
Virtual machine App
Virtual machine App
Internal
ExternalParent
App
Virtual machine App Virtual
machine App
No IP
IP IP
IP
NAT
Types of Virtual Switches
Types of Virtual Switches
Types of Virtual Switches
Types of Virtual Switches
Types of Virtual Switches
Types of Virtual Switches
Types of Virtual Switches
What Is VLAN Tagging?• Used to isolate network traffic for nodes that are connected to the same physical network• VLANs are used by Hyper-V to• Isolate Hyper-V server management networks• Isolate virtual machines that are connected to external virtual switches
• Isolate virtual machines on a single Hyper-V server• VLAN ID can be configured on• Virtual machine network adapter• External and Internal virtual switch
• VLAN is limited to a single physical subnet• VLAN ID has 12 bits (up to 4,094 VLAN IDs)
Lesson 2: Advanced Hyper-V Networking FeaturesVirtual Switch Expanded FunctionalityVirtual Switch ExtensibilityWhat Is SR-IOV?What Is Dynamic Virtual Machine Queue?Network Adapter Advanced Features•NIC Teaming in Virtual Machines
Virtual Switch Expanded Functionality•ARP/Neighbor Discovery Poisoning protection• Protects against ARP and Neighbor Discovery spoofing
•DHCP Guard protection• Protects against rogue DHCP server in virtual machine
•Port ACLs• Enables isolation by allowing/denying traffic
•Trunk mode to a virtual machine• Trunk mode forwards traffic from multiple VLANs
•Network traffic monitoring•Bandwidth limit and burst support
Virtual Switch Extensibility•Extensible• NDIS filter drivers• WFP callout drivers
•Extensions• Ingress• Forwarding• Egress• Monitoring
•Virtual switch can be replaced
Parent partition
Extension miniport
Extension protocolHyper-V virtual switch
Physical NIC
Virtual machine
Host NIC
Virtual machine NIC
Virtual machineVirtual machine
NIC
Filtering extensionsForwarding extension
WFP extensionsCapture extensions
What Is SR-IOV?• Requires support in network adapter• Provides Direct Memory Access to virtual
machines• Increases network throughput • Reduces network latency• Reduces CPU overhead on the Hyper-V server• Virtual machine bypasses virtual switch
• Supports Live Migration
Network I/O with SR-IOVNetwork I/O without SR-IOV
Physical NIC
Parent partition
Virtual switchRouting
VLAN Filtering
Virtual machine
Virtual NIC
SR-IOV Physical NIC
Virtual Function
VMBUS
• Even when different SR-IOV adapters are used
What Is Dynamic Virtual Machine Queue?
•Network adapter uses receive queues to route traffic to the appropriate virtual machine• Physical network adapter must support VMQ• Dynamically use multiple CPUs when processingvirtual machine network traffic• DMA reduces CPU overhead on Hyper-V server• Beneficial when virtual machines receive lot of network traffic
•VMQ is automatically configured and tuned• Based on processor networking and CPU load• VMQ is enabled by default on a virtual network adapter• Used only if the physical network adapter supports VMQ
Network Adapter Advanced Features• Same features
available for all virtual network adapters• Features are
implemented in Hyper-V virtual switch
NIC Teaming in Virtual Machines• Provides redundancy and aggregates bandwidth• Can be used at the operating system and virtual machine level• Multiple physical network adapters in an NIC team
• If a physical adapter fails, virtual switch has connectivity• Multiple virtual network adapters in an NIC team
• If a virtual switch fails, virtual machine has connectivity• Particularly important when SR-IOV is used• SR-IOV traffic bypasses the virtual switch• Intended and optimized to support teaming of SR-IOV
• May be used with any virtual network interface• Virtual machine must have multiple network adapters• Connected to different virtual switches• MAC address spoofing must be enabled
Lesson 3: Configuring & Using Hyper-V Network VirtualizationProviding Multitenant Network IsolationWhat Is Network Virtualization?Benefits of Network VirtualizationWhat Is Network Virtualization Generic Routing Encapsulation?•What Are Network Virtualization Policies?
Providing Multitenant Network Isolation
• Multiple isolated networks on the same infrastructure
• VLANs are often used• Limited scalability (maximum of 4094 VLANs)• VLANs cannot span multiple subnets• Challenging to reconfigure when adding or
moving virtual machineVLAN ID
Switch
Virtual machines
Switch
Providing Multitenant Network Isolation
• Private VLANs• Addresses some VLAN scalability issues• Reduces number of IP subnets and VLANs• Virtual switch can limit virtual machines to the
same VLAN • Port ACLs • Challenging to manage and update ACLs
Hyper-V virtual switch supports private VLANs and port ACLs• The solution is Software Defined Networking
Network virtualization is an implementation of Software Defined Networking• Hyper-V enables network virtualization
What Is Network Virtualization?
Server virtualization• Multiple virtual machines
on a same physical server
• Each virtual machine is isolated from others
Physical server
Blue virtual machine
Red virtual
machineBlue network Red network
Physical network Network virtualization• Multiple virtual
networks on a same physical network
• Each virtual network is isolated from others
Benefits of Network Virtualization• Flexible virtual machine placement•Multitenant network isolation without VLANs• IP address reuse• Live migration across subnets• Is compatible with existing network infrastructure•Transparent moving of virtual machines to shared IaaS cloud•Can be configured using Windows PowerShell• Can also use System Center 2012 R2 Virtual Machine Manager
What Is Network Virtualization Generic Routing Encapsulation?
10.1.1.11 10.1.1.11 10.1.1.12 10.1.1.12
192.168.5.55
192.168.2.22192.168.5.55
10.1.1.1110.1.1.12
10.1.1.1110.1.1.12
GRE Key=5001
GRE Key=6001
MAC
MAC192.168.2.22192.168.5.55
10.1.1.1110.1.1.12
10.1.1.1110.1.1.12
10.1.1.1110.1.1.12
10.1.1.1110.1.1.12
192.168.2.22 (Provider address )
192.168.5.55 (Provider address)
10.1.1.11 (Customer address)
10.1.1.11 (Customer address)
10.1.1.12 (Customer address)
10.1.1.12 (Customer address )
• Customer address space based on virtual machine configuration
• Provider address space based on physical network• Not visible to the virtual machines
What Are Network Virtualization Policies?
SQL 10.1.1.1
WEB
10.1.1.2
SQL 10.1.1.1
WEB
10.1.1.2
Blue Yonder Airlines
Customer Address
Provider Address
10.1.1.1 192.168.1.10
10.1.1.2 198.168.1.12Woodgrove Bank
Customer Address
Provider Address
10.1.1.1 192.168.1.10
10.1.1.2 192.168.1.12
Policy Settings Provider Address Space
Data Center Network
Hyper-V Host 1 Hyper-V Host 2
192.168.1.10
192.168.1.12
SQL SQL WEB
WEB
10.1.1.1
10.1.1.1
10.1.1.2
10.1.1.2Customer Address
Spaces
Blue Yonder Airlines
Woodgrove Bank
•Define customer address-provider address mappings• Specify on which Hyper-V server virtual machines are running• Hyper-V implements policies by translating incoming and outgoing packets• If a virtual machine is moved, policies are modified
• Virtual machine configuration stays the same