标签：machines provides 网络管理 traffic
虚拟交换机的概念 VSS & VDS
vNetwork Standard Switch (vSwitch)： A software-based
switch that resides in the VMkernel and provides traffic
management for virtual machines. Users must manage
vSwitches independently on each ESXi host.
vNetwork Distributed Switch： A software-based switch
that resides in the VMkernel and provides traffic
management for virtual machines the VMkernel. Distributed
vSwitches are shared by and managed across entire clusters
of ESXi hosts.
组接口概念 Port/port group： A logical object on a vSwitch that
provides specialized services for the VMkernel or VMs. A
virtual switch can contain a VMkernel port or a VM port group.
On a vSphere Distributed Switch, these are called dvPort
groups.
VMkernel port ：A specialized virtual switch port type that is
configured with an IP address to allow vMotion, iSCSI
storage access, network attached storage (NAS) or Network
File System (NFS) access, or vSphere Fault Tolerance (FT)
logging. Now that vSphere 5 includes only VMware ESXi
hosts, a VMkernel port also provides management
connectivity for managing the host. A VMkernel port is also
referred to as a vmknic.
Virtual machine port group ：A group of virtual switch ports
that share a common configuration and allow virtual
machines to access other virtual machines or the physical
network.
默认情况下 exsi host 会自动创建一个标准交换机 和一个虚拟机端口 (max number : 120 )组合一个vmkernel端口
创建新的VS switch
可以配置vlan
Port和Source Mac负载均衡能够连接多个物理交换
机，802.3ad的link aggregation却不行。
网络故障切换检测的两种方法: 一个是检查链路,一个是发ping包,一般我们选择默认的
通知交换机:通知物理交换机构建新的cam表 (作vmotion一定要有这个功能)
故障恢复:IP存储的接口最好设置故障恢复选项为“no”
一个是 standby 一个是active
流量控制（Traffic Shaping） :不解释
安全:（1）开启杂合模式相当于把vswitch当作hub使用.
（2）MAC地址更改/伪信号
分布式交换机与普通交换机相同之处
1. Like a vSwitch, a vNetwork Distributed Switch
provides connectivity for virtual machines, Service
Console or Management traffic, and VMkernel
interfaces.
2. Like a vSwitch, a vNetwork Distributed Switch
leverages physical network adapters as uplinks to
provide connectivity to the external physical network.
3. Like a vSwitch, a vNetwork Distributed Switch can
leverage VLANs for logical network segmentation.
VDS优点:
vNetwork Distributed Switch spans multiple
servers in a cluster instead of each server having its
own set of vSwitches. This greatly reduces complexity
in clustered ESX/ESXi environments and simplifies
the addition of new servers to an ESX/ESXi cluster.
创建VDS
在VDS下可以创建port group也可以创建 vmkenral port
本文出自 “Erick WAY” 博客，谢绝转载！
标签：machines provides 网络管理 traffic
原文地址：http://ericfu.blog.51cto.com/416760/1662104
