More info on http://techdays.be.

2. Networking from scratch
• How do I offer networking to my virtualization workloads?
• How do I make my network resilient to failure?
• How do I provide tenant self service?
• How can I provide isolation?
• How do I maintain consistency in large datacenters?

3. Steps to a successful deployment
1. Design your network
2. Build and configure hardware to support your design
3. Configure VMM to implement design:
 Create logical concepts
 Configure hosts
 Configure tenants
 Deploy workloads

4. Assumptions for this session
Installed VMM server
Basic VMM concepts
Basic networking concepts
 Teaming
 Switch
 Router/Gateway

6. Logical view of the network
Tenants
1st question: how do I
provide isolation?
Admin
“Internet”
Corp Datacenter isolation –
Windows Azure Katal
NVGRE services
separation of infrastructure
Gateway on Windows VMM traffic for isolation and QOS
server
Tenant isolation – keeping
Cluster/LM/Storage
tenants from each other and
Management
Provider Network Other protect the infrastructure
management
servers
Tenant 1 Network 1
Tenant 2 Network 1
Tenant 2
VM 1 Compute
Tenant 1
VM 1
Tenant 2
VM 2
Tenant 1
VM 2

7. Isolation

8. The limitations of VLANs
 Limited capacity on each switch and port (4095 max)
 High maintenance
 Easy to make mistakes
 Limits broadcasts

9. Where should you use VLANs
J Infrastructure networks
L Tenant networks are too dynamic
The solution for tenants is network virtualization

10. Software defined networking (SDN)
Ability to create networks on the fly as needed
Ability do define capabilities as needed

11. SP1 :Software Defined Networking
Software Defined Networking (management,
configuration, data)
 Hyper-V Network Virtualization
 Extensible Virtual Switch
Network Policy/Offloads
 SR-IOV
 DHCP Guard
 IPSec Task Offload
 Bandwidth Control
 Trunk Mode

12. Address spaces
Logical network Address space defined by Example
Corp Corp IT 172.30.0.0/16
Internet ICANN 65.55.57.0/24
Management Datacenter Admin 10.0.0.0/24
Provider Datacenter Admin 10.0.1.0/24
Cluster/Storage/etc… Datacenter Admin 10.0.2.0/24
Tenant N Tenant 192.168.1.0/24

14. Host configuration
Three options
Non-converged ConvergedOption1
Converged Option1+ Converged Option2

15. Host configuration… with teaming
Two ways to get there:
Manual configuration in host properties Bare metal deployment
• Already deployed hosts • Consistent deployment
• Updating an existing configuration • Use host profile
• Can re-deploy

17. Merging physical and logical
In VMM

19. Creating logical switch
• Automatic team creation • More up-front configuration
• Configuration for DC on a single object • Limits live migration
• Compliance
• Access to hyper-v port settings
• 3rd party extension management
• Updates get applied to all hosts

20. Single root IO virtualization (SR-IOV)
• Virtual switch bypass for high performance • You need bandwidth controls
workloads • If your physical adapters don’t support it
• Limited number of VMs that can use it per host

22. Tenant configuration
Using network virtualization for isolation
NVGRE gateway gives tenants access to outside world
• Private cloud: route to local networks
• Hybrid cloud: create site to site tunnel
ETA: 2nd quarter 2013

23. VPN Gateway – “Hybrid Cloud”

24. Logical view of the network
Tenants
Admin
“Internet”
Corp
Katal
NVGRE
Gateway VMM
Cluster/LM/Storage
Management
Provider Network Other
management
servers
Tenant 1 Network 1
Tenant 2 Network 1
Tenant 2
VM 1 Compute
Tenant 1
VM 1
Tenant 2
VM 2
Tenant 1
VM 2

25. Tenant configuration - Port
classifications
Container for port profile settings
 For Hyper-V switch port settings and extension port profiles
Reusable
Exposed to tenants through cloud

27. Load Balancing
Faces the tier instances
Each instance gets one Dynamic IP
Back end is usuall on a network with non-
routable IPs

28. Logical view of the network
Tenants
Admin
“Internet”
Corp
Katal
NVGRE
Gateway VMM
Cluster/LM/Storage
Management
Provider Network Other
management
servers
Tenant 1 Network 1
Tenant 2 Network 1
Tenant 2
VM 1 Compute
Tenant 1
VM 1
Tenant 2
VM 2
Tenant 1
VM 2

29. Logical view of the network
Tenants
Admin
“Internet”
Load Balancer Corp
Katal
NVGRE
Gateway VMM
Load Balancer
Cluster/LM/Storage
Management
Provider Network Other
management
servers
Tenant 1 Network 1
Tenant 2 Network 1
Tenant 2
VM 1 Compute
Tenant 1
VM 1
Tenant 2
VM 2
Tenant 1
VM 2

30. Using Virtual Switch Extensions
Why?
 Add functionality not native to Hyper-V switch
 Able to tie virtual to physical network together
Examples
Cisco Nexus 1000v – Public Beta now available!!!
InMon sflow
NEC OpenFlow
5nine

33. Session Goals



34. Virtual Machine Manager 2012
Scenarios
“I want this VM to connect to the Corp network”
 Answer: Logical Networks
“I want to create a template that I can deploy
anywhere”
 Answer: Logical Network Definitions
“I want IP addresses assigned automatically”
 Answer: IP Pools
“I want to scale out applications”
 Answer: Load Balancers

35. Network Management
VMM 2012
LOGICAL NETWORKS ADDRESS POOLS LOAD BALANCERS
Classify network for VMs to • Allocate a static IP • Apply settings for load
access address to VMs from a balancer capability in
preconfigured pool service deployment
Map to network topology
• Create IP pool as a • Control load balancer
Allocate to hosts and clouds managed range of IP through vendor provider
address assignments based on PowerShell
• Create MAC address pool • Create virtual IP
as a managed range of templates consisting of
MAC address load balancer
assignments configuration settings

36. Logical Network
A logical abstraction for the type or class of network a VM connects to
Internet VM to VM
Data

37. Network objects
Logical Logical Subnet- IP Pool
Network 1-M network 1-M VLAN 1-M
definition “StaticSrv”
“10.0.0.0/24” “10.0.0.1-
“Corp” “Building 42” “VLAN 5” 10.0.0.99”
Host group Virtual network
“Production” adapter
Physical network adapter Virtual switch

38. Address Pools
IP POOLS MAC POOLS VIRTUAL IP POOLS
Assigned to VMs, vNICs, Assigned to VMs Assigned to service tiers
hosts, and virtual IPs that use a load balancer
(VIP’s) Specified use in VM
template creation Reserved within IP Pools
Specified use in VM
template creation Checked out at VM Assigned to clouds
creation—assigned
Checked out at VM before VM boot Checked out at service
creation—assigns static IP deployment
in VM Returned on VM deletion
Returned on service
Returned on VM deletion deletion

39. Load Balancer Support
AUTOMATION SUPPORTED VIRTUAL IP TEMPLATES
BALANCERS
Connect to load balancer F5 BIG-IP Specifies preconfigured
through hardware properties for configuring
provider Brocade ServerIron ADX a load balancer at service
deployment
Assign to clouds, host Citrix NetScaler
groups, and logical Specifies load balancing
Microsoft Network Load
networks methods—round robin,
Balancer
least connections, fastest
Configure load balancing response
method and add virtual IP
on service deployment

41. PowerShell - Creating a Logical
Network

42. PowerShell – IP Pools

43. PowerShell – IP Pool Queries

44. What’s new in Service Pack 1
Networking Scenarios

45. Connectivity
VM Networks

46. VM Networks
No Isolation
Pass-through to Logical Network
Maximum of one per Logical network
VM
Network
No Isolation
“mgmt”
Logical Logical Subnet- IP Pool
Network network VLAN
definition “StaticSrv”
“10.0.0.0/24” “10.0.0.1-
“Corp” “Building 42” “VLAN 5” 10.0.0.99”

47. Hyper-V Network Virtualization
Blue VM Red VM Blue Network Red Network
Virtualization
Physical Physical
Server Network
Server Virtualization Hyper-V Network
 Run multiple virtual servers Virtualization
on a physical server
 Run multiple virtual networks on a
 Each VM has illusion it is running as a physical network
physical server
 Each virtual network has illusion it is
running as a physical network

48. Virtualize Customer Addresses
Provider Address Space (PA)
Blue
System Center Datacenter Network
Corp Blue
Virtualization Policy
10.0.0.5
10.0.0.7 Blue
10.0.0.5 192.168.4.11 192.168.4.11 192.168.4.22
10.0.0.7 192.168.4.22 Host 1 Host 2
Blue Blue
10.0.0.5 192.168.4.11 10.0.0.5 192.168.4.11
Red Red 10.0.0.7 192.168.4.22
Red
10.0.0.7 192.168.4.22
Corp
Red
Red
10.0.0.5 192.168.4.11 10.0.0.5
10.0.0.7
192.168.4.11
192.168.4.22
10.1.1.1 192.168.4.11
10.1.1.2 192.168.4.22
10.0.0.5 10.0.0.7 192.168.4.22
10.0.0.7
Blue1 Red1 Blue2 Red2
10.0.0.5 10.0.0.5 10.0.0.7 10.0.0.7
Customer Address Space (CA)

49. VM Networks
Hyper-V Network Virtualization
Default method is to encapsulate packets using
NVGRE
A VM Network defines a routing domain
 A routing domain can contain multipleVM Subnet
VM virtual subnets IP Pool
Network 192.168.0.0 (CA)
Net. Virt. /16 192.168.0.2
“Finance” 192.168.0.9
9
Logical Logical Subnet- IP Pool
Network network VLAN (PA)
definition
“10.0.0.0/24” “StaticSrv”
“Corp” “Building 42” “VLAN 5” “10.0.0.1-
10.0.0.99”

50. VM Networks
Hyper-V Network Virtualization Gateways
VMM will manage and configure gateways for NV
 Routing gateway
 VPN gateway

51. VM Networks
VLAN
One VLAN per VM Network
Uses VLANs from Logical Network Definitions
 Introducing new Logical Network property for ―Not Connected‖
VM VM Subnet
Network “99.0.0.0/24
VLAN ”
“Finance” 44
Logical Logical Subnet- IP Pool
Network network VLAN
definition “StaticSrv”
Not “99.0.0.0/24” “99.0.0.1-
Connected “B42Tenants “VLAN 44” 99.0.0.99”
“TenantVLANs ”

52. VM Networks
External
Isolation is managed by switch extension
VM Networks are imported from extension manager
IP Pool
VM VM Subnet
Network “StaticSrv”
External “99.0.0.1-
“Finance” 99.0.0.99”
Logical Logical
Network 1-M network
definition
Not
Connected “B27Tenants
“TenantNets” ”

54. VM Network Powershell

55. What’s new in Service Pack 1
Networking Scenarios

56. Capability
Defines how a network adapter is able to use its connection
 Quality of service
 Security
 Monitoring
Capabilities are provided by Hyper-V Extensible Virtual Switch and
extensions

57. Key Tenets for Hyper-V Extensible Switch
Key Tenets Benefit
Extensible, not replaceable Added features don’t remove other
features
Pluggable switch Extensions process all network traffic,
including VM-to-VM
1st class citizen of system Live Migration and offloads just work;
Extensions work together
Open & public API model Large ecosystem of extensions
Logo certification and rich OS High quality extensions
framework
Unified Tracing thru virtual switch Shorter down times

58. Extensions are Filters or
Windows Filtering Platform
Providers
Extension state/configuration
is unique to each instance of
an Extensible Switch on a
machine

59. VMM Management of Switch
CA1 CA2
CA1
Extensions VM1 VM2 VMU
Hardware
3rd Party components
SCVMM
Virtualization
Root Partition
VMM VMM
Agent Server
Vendor
SCVMM
Plugin
Physical NIC Physical NIC
Vendor network mgmt
(SRIOV) (Non SRIOV) console
Top of rack switch
Policy
database

60. Extension Manager Integration
Supplies network objects and policy to VMM
3rd Party
Extension
Manager
VMM
Provider Virtual
1. Import: Switch
Logical Networks Extension
Policy IP Pools Manager
database
VM Networks (VSEM)
Port Profiles Provider
Interface

61. Host NICs
Physical
Multiple Windows Server 2012 hosts
Uplink Uplink Uplink Uplink Uplink Uplink Uplink Uplink
pNIC1 pNIC2 pNIC1 pNIC2 pNIC1 pNIC2 pNIC1 pNIC2
…on Host1 …on Host2 …on Host3 …etc
Virtual Switch
Instances
Native Extension1 Native Extension1 Native Extension1 Native Extension1
Switch Switch Switch Switch
Settings Extension2 Settings Extension2 Settings Extension2 Extension2
Settings
Extension3 Extension3 Extension3 Extension3
vNICs
VM1 VM2 VM3 VM4 VM5 VM6
VM
vNIC1 vNIC1 vNIC1 vNIC1 vNIC1 vNIC1
Host
vNICs
Host2 Host2
Host
Host1 Host1 Host3 Host3 Host4 4
vNIC1 vNIC2 vNIC1 vNIC2 vNIC1 vNIC2 vNIC1 vNIC
2

62. VMM Switch Infrastructure
Host NICs
Physical
Uplink Uplink Uplink Uplink Uplink Uplink Uplink Uplink
pNIC1 pNIC2 pNIC1 pNIC2 pNIC1 pNIC2 pNIC1 pNIC2
Logical Switch
Native
Switch Extension1 Extension2 Extension3
Settings
vNICs Instances
…on Host1 …on Host2 …on Host3 …on Host4
VS
VM1 VM2 VM3 VM4 VM5 VM6
VM
vNIC1 vNIC1 vNIC1 vNIC1 vNIC1 vNIC1
Host
vNICs
Host2 Host2
Host
Host1 Host1 Host3 Host3 Host4 4
vNIC1 vNIC2 vNIC1 vNIC2 vNIC1 vNIC2 vNIC1 vNIC
2

63. Logical Switch
A single logical representation of the virtual switch instances which
exist in a group of hosts

64. Physical NIC
Logical switch
1-M
objects Extension
1-M
M - M Uplink Port
Switch Extensions Uplink Port Profile
M - M “Cisco Nexus 1000v” Profile Set
Logical Switch “InMon sFlow”
M-1 Native
1-M Uplink Port
“B42Switch” Profile
Self Service User
Extension
M - M Virtual Port
1-M Port 1-1 Virtual Port
Classificati Profile Set Profile
on
“Fast DB” Native
“Web” Virtual Port
M-1
“Restricted” Profile
1-M
1-M
Cloud vNIC

65. Physical NIC
Logical switch
1-M
objects
1-M
Uplink Port
Profile Set
Logical Switch
M-1 Native
1-M Uplink Port
“B42Switch” Profile
1-M Port 1-1 Virtual Port
Classificati Profile Set
on
“Fast DB” Native
“Web” Virtual Port
M-1
“Restricted” Profile
1-M
1-M
Cloud vNIC

67. Windows Server IP Address Management
Integration Script
Reports IP Pool utilization from VMM into IPAM
Can run on demand or configure as a periodic task
Included in the “cd layout” of VMM
 scriptsIPAMIntegration.ps1

69. In Review: Session Objectives
And Takeaways