Introduction to VMware Virtual machine switches

When you create a virtual machine, your own network card needs to be bridged, and the virtual switch is used
Virtual Switch: Standard switch, distributed Virtual Switch

features offered by virtual switches : network bridging, online migration

Standard switch : Virtual Switch configuration for a single host, created on an ESXi host, is not visible on another ESXi host
Distributed Virtual Switches : Created on vcenter server, visible on all ESXi hosts for centralized network management and planning
Virtual Switch Port type : VMkernel, Virtual machine port Group
VMkernel: for storage, vMotion, management, need to configure IP address
Virtual Machine Port Group : port for upstream transport service for virtual machines, no IP address required

ESXi does not support migrating virtual machines between hosts in different broadcast domains, so two ESXi hosts are placed in the same broadcast domain

VLAN ID 0 means no label is assigned, 4095 means all VLANs are allocated
Load balancer for outbound traffic only, and load balancer using hardware at the pit stop

The vmkernel is responsible for detecting network faults, and can monitor
1. Monitoring link status: Power off, disconnection
2. Link status plus Beacon: Detects faults that can be detected only on link states
Triggered action: Notifies the switch
1. Fault switching
2. The new virtual network card is connected to the virtual switch

(VDS) distributed virtual switches: avoid duplication of effort
1. Simplified Virtual Machine Network configuration (port configuration, port naming)
2. More powerful network monitoring and troubleshooting functions
3. Support Advanced Vsphere network connectivity (support for third-party switch extensions)

Storage: Shared storage
The VMware virtual machine file System (VMFS-5) is a high-performance clustered filesystem that enables the application of virtualization technology beyond the limits of a single system. VMFS design, build, and optimize for virtual server environments, multiple virtual machines can collectively access a consolidated clustered storage pool, which significantly improves resource utilization.

VMFS is the basis for virtualization across multiple servers, enabling services such as Vmotion, DRS, and HA
1, provide disk block-level locking function (two ESXi cannot open a virtual machine file at the same time)
2, ESXi failure, the block-level locking function will be removed

The file system used by the virtual machine is not a VMFS, it is placed in storage through the ESXi host encapsulation

Virtual Machine Files
. VMX configuration file
. VSWP Interchange Files
. NVRAM BIOS File
. VMDK Disk Description file
. FLAT-VMDK Disk data files
. VMSS Pending Status file
. VMSD Snapshot data files
. Vmsn Snapshot State files
. vmtx Template File
-DELTA.VMDK Snapshot disk files
.-RDM.VMDK Bare Device mapping file

This article is from the "Ma Guange-Blog" blog, please be sure to keep this source http://maguangjie.blog.51cto.com/11214671/1930488

Introduction to VMware Virtual machine switches