3. Architectural Changes
The Open vSwitch is now the default network stack
for the product.
Improvements to Distributed Virtual Switching
include a fail-safe option and various improvements
based on customer feedback from XenServer 5.6
Feature Pack 1.
General network performance has been
improved, particularly aggregate host network
throughput.
Support for hardware-assisted Single Route I/O
Virtualization network performance optimizations
has been improved, particularly for use with the
NetScaler VPX and SDX products.
XenServer no longer requires Windows-based virtual
machines for features such as StorageLink, Site
3
4. XenServer Product Line
XenServer is available in four editions to meet the
needs of any organization.
4
5. XenCenter Overview
XenCenter:
• is a graphical, Windows-based user interface.
• allows you to manage XenServer hosts, resource
pools and shared storage, and to deploy, manage
and monitor virtual machines from your Windows
desktop machine.
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6. Resource Pools
XenServer allows you to manage multiple XenServer
hosts as a single entity through the use of resource
pools.
In the event of a host failure
In preparation for upgrade a XenServer host
To consolidate virtual machines to a select number
of XenServer hosts in order to reduce power
consumption
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7. Microsoft System Center Integration
XenServer 6.0 supports System Center Virtual
Machine Manager (SCVMM) 2012 for managing
XenServer hosts and virtual machines. To enable
these management capabilities, install a
supplemental pack from Citrix.
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8. Live Storage XenMotion
Extends standard XenMotion
Migrates VM disks from any storage ty
storage type
Local, DAS, iSCSI, FC
•Supports cross pool migration
Requires compatible CPUs
•Encrypted Migration model
•Specify management interface for opt
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9. XenServer Conversion Manager
Convert VMware virtual machines to XenServer
Convert multiple virtual machines in one simple wizard
Map network settings between VMware and XenServer so
your converted virtual machines will come up with the
proper network settings
Choose the storage location where you would like your
new XenServer virtual machines to run
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11. XenServer Networking Overview
You can configure four different virtual networks in
XenServer:
Single-Server Private networks, which are a type of
internal network
External networks
Bonded networks, which are a type of external
network
Cross-Server Private networks, which are a type of
internal network.
(Cross-Server private networks will be discussed in
the Distributed Virtual Switching module.)
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12. Network Stacks Supported by XenServer
There are two networking stacks in XenServer 6.0:
The Open vSwitch, the default networking stack
The Linux bridge
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13. Network Components and Architecture
One network is created for each physical network
interface card during XenServer installation.
The XenServer host performs all the required
configurations of the physical network interface
cards.
When you add a XenServer host to a resource
pool, the default networks are merged so that all
physical NICs within the same device name are
attached to the same network.
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14. Bonding - Source Load Balancing
SLB is an active/active mode which:
Does not require switch support for EtherChannel
or 802.3ad.
Load-balances traffic between multiple physical
interfaces at the MAC address level by sending
traffic through different physical interfaces based
on the source MAC address of the packet.
Is derived from the open source Adaptive Load
Balancing (ALB) mode and reuses the ALB capability
to dynamically re-balance load across physical
interfaces.
SLB Active-passive bonds:
Can be configured with one fast path, and one slow
path for cost savings. In this scenario, the slow path
should be used only if there is a failure on the fast
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15. Networking Enhancements in XenServer 6.1
LACP bonding support
Support for up to 4 NICs per bond
VLAN scalability improvements
Port locking for cloud providers
IPv6 guest support
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16. Active-Active SLB vs. LACP
All links can be active
regardless of traffic type
Source MAC as well as
IP/port based load balancing
Requires 802.3ad standard on
switch
Requires switch-side
configuration
All links must be connected
to 1 switch/stack switches
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Can be used with any switch
No requirement for stacking
(6.1)
Support up to 4 NICs
Load balancing only if
multiple
MAC addresses are present
Hinweis der Redaktion
Hardware Layer:Contains the Physical server components, including memory, CPU, and Disk DrivesXenHypervisor:Is a thin Layer of Software that runs on top of the hardware.Control Domain:Manages the network and storage I/O of all virtual machines. (Is a Linux virtual machine)Guest operating System:Is the Operating System that is installed on the virtual machineLinux VM:include paravirtualized kernels and drivers.Windows VM:Use paravirtualized drivers to access storage and network recources.