module - 5 configuring and manging virtual networks
TRANSCRIPT
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Configuring and Managing Virtual Networks
Module 5
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VMware vSphere: Install, Configure, Manage – Revision A
Course Introduction
Introduction to Virtualization
Creating Virtual Machines
VMware vCenter Server
Configuring and Managing Virtual Networks
Configuring and Managing vSphere Storage
Virtual Machine Management
Data Protection
Access and Authentication Control
Resource Management and Monitoring
High Availability and Fault Tolerance
Host Scalability
Patch Management
Installing VMware vSphere Components
You Are Here
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VMware vSphere® ESXi™ networking features allow the following:
Virtual machines to communicate with other virtual and physicalmachines
Management of the ESXi host
The VMkernel to access IP-based storage and perform VMwarevSphere® vMotion® migrations
Failure to properly configure ESXi networking can negatively affect
virtual machine management and storage operations.
Importance
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Lesson 1: Introduction to vNetwork Standard Switches
Lesson 2: Configuring Standard Virtual Switch Policies
Module Lessons
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VMware vSphere: Install, Configure, Manage – Revision A
Lesson 1:
Introduction to vNetwork Standard
Switches
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VMware vSphere: Install, Configure, Manage – Revision A
After this lesson, you should be able to do the following:
Define a virtual network.
Describe a virtual switch.
Describe the virtual switch connection types.
Describe the components of a vNetwork standard switch.
Create a vNetwork standard switch.
Learner Objectives
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VMware vSphere: Install, Configure, Manage – Revision A
A virtual network provides networking for hosts and
virtual machines. A virtual switch:
Directs network trafficbetween virtual machinesand links to external
networks. Combines the bandwidth of
multiple network adaptersand balances traffic amongthem. It can also handlephysical network interface card (NIC)failover.
Models a physical Ethernet switch:
• A virtual machine’s NIC can connect to a port. • Each uplink adapter uses one port.
What Is a Virtual Network? What Is a Virtual Switch?
Physical NIC
Virtual
NICVirtual
NIC
Virtual
NIC
vmnic0 vmnic1
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VMware vSphere: Install, Configure, Manage – Revision A
A virtual switch allows the following connection types:
One or more virtual machine port groups
VMkernel port:
• For IP storage, vMotion migration, VMware vSphere® Fault Tolerance• For the ESXi management network
Types of Virtual Switch Connections
Production Test Dev DMZ vMotion Management
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More than one network can coexist on the same virtual switch, or
networks can exist on separate virtual switches.
Virtual Switch Connection Examples
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VMware vSphere: Install, Configure, Manage – Revision A
A virtual network supports two types of virtual switches:
vNetwork standard switches:
• Virtual switch configuration for a single host• Discussed in this module
vNetwork distributed switches:
• Virtual switches that provide a consistent network configuration for virtualmachines as they migrate across multiple hosts
Types of Virtual Switches
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Standard Virtual Switch Components
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VMware vSphere: Install, Configure, Manage – Revision A
Default Standard Virtual Switch Configuration
Display standard
virtual switches.
Delete the
virtual switch.Display virtual
switch properties.
Display port group
properties.
Display CiscoDiscovery Protocol
information.
Enable IPv6 on
ESXi host.
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You can change the number of ports on a standard virtual switch.
Standard Virtual Switch Ports
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For each physical adapter, speed and duplex can be changed.
You might need to set the speed and duplex for certain NIC and
switch combinations.
Network Adapter Properties
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ESXi supports 802.1Q VLAN tagging.
Virtual switch tagging is one of three
tagging policies supported.
Packets from a virtual machine aretagged as they exit the virtual switch.
Packets are untagged as they returnto the virtual machine.
Affect on performance is minimal.
ESXi provides VLAN support by
giving a port group a VLAN ID.
VLANs
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Discuss VMware vSphere® networking needs with your network
administration team. Discuss the following issues: Number of physical switches
Network bandwidth required
Physical switch support for 802.3AD (for NIC teaming)
Physical switch support for 802.1Q (for VLAN trunking)
Network port security
Cisco Discovery Protocol (CDP) and its operational modes: listen,broadcast, listen and broadcast, and disabled.
Physical Network Considerations
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In this lab, you will create a standard virtual switch and port group.
1. View the current standard virtual switch configuration.
2. Create a standard virtual switch with a virtual machine port group.
3. Attach your virtual machine to a virtual switch port group.
Lab 5
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VMware vSphere: Install, Configure, Manage – Revision A
You should be able to do the following:
Define a virtual network.
Describe a virtual switch.
Describe the virtual switch connection types.
Describe the components of a vNetwork standard switch.
Create a vNetwork standard switch.
Review of Learner Objectives
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Lesson 2:
Configuring Standard Virtual Switch
Policies
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After this lesson, you should be able to describe the security
properties of a standard virtual switch port group: Security
Traffic shaping
NIC teaming policies
Learner Objectives
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Three network policies:
Security
Traffic shaping
NIC teaming
Policies are defined:
At the standard virtual switch level:• Default policies for all the ports on the standard virtual switch
At the port or port group level:
• Effective policies: Policies defined at this level override the default policiesset at the standard virtual switch level.
Network Policies
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Administrators can configure layer 2 Ethernet security options at the
standard virtual switch and at the port groups.
Security Policy
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Network traffic shaping is a mechanism for controlling a virtual
machine’s network bandwidth. Average rate, peak rate, and burst size are configurable.
Traffic-Shaping Policy
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VMware vSphere: Install, Configure, Manage – Revision A
Traffic shaping is
disabled by default.Parameters apply to
each virtual NIC in
the standard virtual
switch.
On a standard
switch, traffic
shaping controls
outbound traffic
only.
Configuring Traffic Shaping
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NIC Teaming
settings: Load Balancing
(outbound only)
Network FailureDetection
Notify Switches
Failback
Failover Order
NIC Teaming Policy
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Load-Balancing Method: Originating Virtual Port ID
virtual
NICs
physical
NICs
virtual
switch physical
switch
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Load-Balancing Method: Source MAC Hash
virtual
NICs
physical
NICs
virtual
switch
Internet
physical
switch
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Load-Balancing Method: IP-Hash
virtual
NICs
physical
NICs
virtual
switch
Internet
physical
switch
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VMware vSphere: Install, Configure, Manage – Revision A
Network failure is detected by the
VMkernel, which monitors: Link state only
Link state, plus beaconing
Switches can be notified whenever:
A failover event occurs
A new virtual NIC is connected tothe virtual switch
Failover implemented by the VMkernel
based on configurable parameters:
Failback:
• How physical adapter is returned to active duty after recovering from failure Load-balancing option:
• Use explicit failover order. Always use the highest order uplink from the listof active adapters that pass failover detection criteria.
Detecting and Handling Network Failure
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You should be able to describe the security properties of a standard
virtual switch port group: Security
Traffic shaping
NIC teaming policies
Review of Learner Objectives
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There are two connection types on a virtual switch: virtual machine and
VMkernel. A standard virtual switch is a virtual switch configuration for a single
host.
Network policies set at the standard virtual switch level can beoverridden at the port group level.
Questions?
Key Points