NetScaler Networking Deployment

NetScaler Networking Deployment

说起NetScaler，一直没有时间详细的研究，今天有空，研究了下NetScaler的网络部署。

其实，很简单，要了解怎么来部署NetScaler的网络结构，需要了解NetScaler的工作原理，这里大致介绍一下：

Citrix NetScaler is a Web application delivery appliance that makes applications run five times better. Available as a separate hardware network device or as a virtualized appliance, NetScaler optimizes application availability through advanced L4-7 load balancing and traffic management, accelerates performance, increases security with an integrated application firewall and substantially lowers costs by increasing Web server efficiency.

主要作用就是Web加速，SSL ×××的功能，load balancing，access gateway，application firewall等可以了解下。

弄清楚了它的工作原理就很清楚了。它是一个访问网关，转发器。

部署方式主要由两类四种方式，针对四种不同的网络结构。

Two-Arm Mode ,Multiple Subnets

Two-Arm Mode,Transparent Mode

One-Arm Mode,Single Subnet

One-Arm Mode,Multiple Subnets

看图，能看个大概。解释下图中的几个名词：

One-Arm：单臂

Two-Arm：双臂

NSIP：NetScaler IP Address，NetScaler的管理口地址

VIP：Virtual IP Address，对外提供服务的地址

SNIP：Subnet IP Address，连接内网服务器的地址

MIP:Mapped IP Address，连接内网服务器的地址

GSLBIP:Global Server Load Balancing IP Address，多数据中心做负载均衡时使用的地址