The SD-WAN Enterprise Edition 1000, 2000, and 2100 appliances combine virtualized instances of WAN optimization and Virtual WAN functionality installed on the appliance. It offers a combination of Virtual WAN and WAN Optimization capabilities.
The SD-WAN 1000 EE, 2000 EE, and 2100 appliances are based on the Citrix branch architecture, which supports multiple virtual machines. All branch appliances contain a SD-WAN instance, a management service instance, and a Xen hypervisor.
The SD-WAN instance is typically used in inline mode, with the SD-WAN instance interposed between the WAN router and the LAN, so WAN traffic flows through the accelerated bridge. The SD-WAN instance can also be deployed in virtual inline mode, using a single accelerated bridge port.
In addition to the accelerated bridges and the Windows LAN port, a management port connects to all virtual machines (instances) and the hypervisor.
The appliance has two modes, two-port mode and four-port mode, which determine how ports 1/3 and 1/4 are used.