VMware, VSphere 6.0 network detailed

I. Introduction to the VMware VSphere 6.0 network

1. Overview of the network concept

Some concepts are critical to a thorough understanding of a virtual network. If you are a new user of ESXi, it will be helpful to know these concepts.

Physical Network in order to enable the physical machines to send and receive data, the network established between the physical machines. VMware ESXi runs on top of a physical machine.

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. A virtual machine can connect to a virtual network that is created when the network is added.

Physical Ethernet Switch manages network traffic between computers on the physical network. A single switch can have multiple ports, each

Ports can be connected to a computer or other switch on the network. The behavior of each port can be configured in some way, depending on the needs of the computer to which it is connected. The switch will learn about the host that connects its ports and use that information to forward traffic to the correct physical machine. A switch is the core of a physical network. Multiple switches can be connected together to form a larger network.

vSphere Standard Switches it operates in a very similar way to a physical Ethernet switch. It detects logical connections to its virtual port

Virtual machine and use that information to forward traffic to the correct virtual machine. A physical Ethernet adapter (also known as an uplink adapter) can be used to connect a virtual network to a physical network to connect a vSphere standard switch to a physical switch. This type of connection is similar to connecting a physical switch together to create a larger network. Even though the VSphere standard switch works much like a physical switch, it does not have some of the advanced features that physical switches have.

Standard Port Group Standard port groups Specify port configuration options such as bandwidth throttling and VLAN tagging policies for each member port. 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.

VSphere Distributed (distributed) Switch It acts as a single switch for all associated hosts in the datacenter to provide centralized provisioning, management, and monitoring of virtual networks. You can configure VSphere distributed on the VCenter Server system

Switch, the configuration propagates to all hosts associated with the switch. This enables virtual machines to ensure that their network configuration is consistent while migrating across multiple hosts.

Host Agent Switch A hidden standard switch residing on each host that is associated with vSphere distributed switch. Master

the network configuration set on vSphere distributed switch is copied to a specific master Machine.

Distributed Ports a port on a vSphere distributed switch that is connected to the host's VMkernel or virtual machine's network adapter.

Distributed port groups a port group associated with VSphere distributed Switch and specify port configuration options for each member port. Distributed port groups define how you connect to the network through VSphere distributed Switch.

Nic teaming NIC teaming occurs when multiple uplink adapters are associated with a single switch to form a group. the team shares the traffic load between the physical network and the virtual network to all or part of its members, or provides passive failover in the case of a hardware failure or network outage.

VLAN VLANs can be used to further fragment a single physical LAN segment so that the ports in the port group are mutually isolated as if it were on a different physical segment. The standard is 802.1Q.

VMkernel TCP/IP network layer The VMkernel Network layer provides connectivity to the host and handles the standard infrastructure traffic for VSphere VMotion, IP storage, Fault tolerance, and Virtual SAN.

IP Memory any form of storage that uses TCP/IP network communication as its basis. ISCSI can be used as virtual machine data

storage, NFS can be used as a virtual machine data store for direct mounting. ISO files, which are displayed as CD-ROM for virtual machines.

tcp Fragment Cleanup tcp Fragment Cleanup (TSO) causes the TCP/IP stack to emit very large frames (up to KB), even if the maximum Transmission Unit (MTU) of the interface is smaller. The network adapter then divides the larger frame into the MTU-sized frame and presets an adjusted copy of the initial TCP/IP header.

Ii. Management of VMware vsphere standard switches

Iii. managing VMware vsphere Distributed Switches

Iv. Understanding third-party virtual switches

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VMware, VSphere 6.0 network detailed