Vmware vnetwork Standard and distributed switches

Objective:

In order to better understand the network of virtual machine, we must have a certain understanding of the switch of the virtual machine, below I have a vnetwork of the standard switches and distributed switch equipment and functions to do their own understanding and insight, I hope to have the help of friends.

Vmware Vnetworkof standard and distributed switches1.1. What is the definition of a network?

The network is the virtual platform of information transmission, receiving and sharing, through which the information of each point, polygon and body is connected together, so as to realize the sharing of these resources.

A network is a physical link that connects individual workstations or hosts together.

1.2. of the networkOSI model

The OSI is an abbreviation for open System interconnection, which means that it is connected to the opening systems. International Standardization Group

Weaving ( ISO) developed the OSI model. This model divides the work of network communication into 7 layers, namely, physical layer, data

Link layer, network layer, transport layer, Session layer, presentation layer, and application layer.

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1.3. physical networks and virtual networks

Physical network : A physical network is a network that is established between physical machines to enable the physical machines to send and receive data between them.

Virtual network: a network of logical connections between virtual machines running on a single physical machine in order to send and receive data to each other. Virtual machines can connect to virtual networks that are created when you add a network

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1.3.1.Switch

A switch is a network device used for the forwarding of electrical signals. It provides a unique electrical signal path for any of the two network nodes that access the switch. The most common switch is the Ethernet switch.

1.3.2. Port GroupLoad BalancingVLAN

Port Group :

port groups specify for each port such as the broadband limit and port configuration options such as VLAN tagging policy. Network services connect to a standard switch through a port group. The port group defines how the network is connected through the switch. Typically, a single standard switch is associated with one or more port groups.

Load Balancing:

Load Balancing ( Load balancing is built on the existing network structure, which provides a cheap and effective way to expand network equipment and server bandwidth, increase throughput, enhance network data processing capabilities, and improve network flexibility and availability.

VLAN:

The Chinese name of the VLAN(virtual local areanetwork) is " virtualized local area network ". VLAN is a new data exchange technology that can logically divide LAN devices into network segments to realize virtual workgroup. This feature is only enabled on the second layer of the VLAN protocol

1.4. vnetworkStandard Switches1.4.1. Virtual Switch

Used to boot network traffic between virtual machines and link to external networks.

used to consolidate the bandwidth of multiple network adapters and to balance the traffic between them. In addition, it can be used to handle failover of physical network cards (NICs) .

Emulate the physical Ethernet switch:

the network card of the virtual machine can be connected to the port. Each uplink adapter uses one port.

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1.4.2. VSphereStandard Switches

The VSphere standard switch simulates a physical Ethernet switch. The default number of logical ports for standard switches is . Each port can connect to a network adapter for a virtual machine. Each uplink adapter that is associated with a standard switch uses one port.

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1.4.3. connection types for virtual switches

The virtual switch supports the following connection types:

§vmkernel Port:

For example, for IP storage or vMotion migration

used to ESXi Management Network

§ one or more virtual machine port groups

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Example:

multiple networks can coexist in the same virtual switch, or can exist in a number of separate virtual Change the machine.

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1.5. Standard Virtual Switch Components

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1.5.1. Vmwaredefault standard Virtual Switch configuration

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1.5.2. VLAN

ESXi Support 802.1Q VLAN tagging feature.

Virtual Switch tags are one of the three tag policies supported.

§ When a packet from a virtual machine is sent out from the virtual switch, the corresponding token is added.

§ when these packets return to the virtual machine, the tokens are canceled.

§ minimal impact on performance.

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1.5.3. The network connectivity requirements that are typically discussed by the operations and network management team:

§ number of physical switches

§ Required network bandwidth

§ support for 802.3AD physical switches (to implement NIC bindings)

§ support for 802.1Q physical switches (for VLAN trunking)

§ Network port security

§cisco Discovery Protocol (CDP) and its operating modes: listening, broadcasting, listening, and broadcasting

and disabled.

1.6. VmwareDistributed Switches (VSphere Distributed Switch)1.6.1. vspheredistributed SwitchArchitecture

VSphere distributed Switch is like a switch between all associated hosts. This enables you to set

Network configuration across all member hosts and enables virtual machines to maintain their network while migrating across multiple hosts

Configuration is consistent.

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1.6.2. Pipeline network resources

The network resource pool determines the bandwidth that is given to different network traffic types on VSphere distributed Switch.

when enabled When network I/O Control , the distributed switch traffic is divided into the following predefined network resource pools:Fault tolerance traffic, ISCSI traffic, vMotion traffic, Manage traffic,vSphere Replication (VR) traffic,NFS traffic, and virtual machine traffic. You can also create a custom network resource pool for virtual machine traffic.

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To summarize:

Here is what I learned in the income it! Hope to learn VMware virtualization friends some help, but also hope that we can publish some ideas, let us make progress together!!

This article is from the "meeting-Rookie Road" blog, please be sure to keep this source http://chenzhou312.blog.51cto.com/8139578/1547133

Vmware vnetwork Standard and distributed switches