Citrix SD-WAN Series - Page 192

Citrix SD-WAN Platforms
Type vCPUs RAM Disk
Maximum
WAN Speed
Maximum
Accelerated
Connec-
tions
Maximum
SD-
WAN/SD-
WAN
Plug-ins
VPX Express 2 1 GB 60 GB 512 kbps 10 5
Min.
evaluation
config.
2 1 GB 60 GB 2 mbps 1,000 5
Minimum resource requirements
An SD-WAN VPX virtual machine has the following minimum hardware requirements for a production
environment:
• 2 GB RAM
• 100 GB disk (local disks provide the best performance)
• 2 virtual NICs (Ethernet ports), except for Amazon AWS, which requires only one virtual NIC
• 2 virtual CPUs
• A modern CPU (Intel Nehalem or newer or AMD Family 10 h or newer, both of which were in-
troduced in 2008). Older CPUs can run at reduced performance due to the use of emulated
x86 TSC (timestamp counter) functionality. When clock states higher than C1 are not used and
SpeedStep/PowerNow modes are disabled in the BIOS of older processors, TSC emulation will
not be used and the system runs at normal speed.
The server hosting VPXmust have RAM, CPU, and disk resources greater than those requiredby the VPX
VM. (VPX does not support VMware hardware over-commit.) Obviously, the server must have enough
resources to run the hypervisor in addition to the virtual appliance. However, having as many physical
Ethernet ports as virtual ones is not mandatory when one of a VPX VM’s Ethernet ports is connected
to another virtual machine on the same server. Possible Ethernet options include:
• Mapping the VPX VM’s two virtual ports to two physical ports, rendering its operation equivalent
to that of a stand-alone SD-WAN.
• Mapping one of VPX VM’s virtual ports to a physical port, and the other to a virtual network con-
taining one or more virtual machines on the same server, thus creating an accelerated server.
• Mapping each of VPX VM’s virtual ports to a virtual network, thus chaining the VPX VM between
two sets of VMs on the same server.
The following figure shows a VPX VM in a one-arm deployment for traic that ends on another virtual
machine on the same server. Only one physical port is required in this case, but both virtual ports are
used.
© 1999-2021 Citrix Systems, Inc. All rights reserved. 192