Citrix SD-WAN Series

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Citrix SD-WAN Platforms

Maximum usable resources

Following are the maximum amount of resources that a single VPX virtual machine can use eectively:

• 4 virtual CPUs

• 8 GB RAM

• 500 GB disk

• 4 virtual NICs (Release 9.x)

• 8 virtual NICs (Release 10.x)

Server resources not allocated to VPX VMs are available to other VMs on the same server, but be

careful to avoid overcommitting resources.

Disk and RAM

While the amounts of RAM and disk space are increased, the additional resources are allocated primar-

ily to the compression subsystem. Increased memory also allows more connections and acceleration

partners to be supported.

The SD-WAN compression system makes heavy demands on the disk subsystem. In general, local disk

storage outperforms network disk storage and reduces resource contention on both the LAN and the

network disk.

The relationship between disk or memory resources and link speed is indirect. Memory and disk sizes

have no eect on the speed at which packets are sent more than the link (bps). Providing more mem-

ory and disk space improves compression performance by increasing the amount of compression his-

tory that can be used for pattern matching.

Virtual NICs

Except for Amazon AWS, two virtual network interfaces are required. They are bridged and used for

bothacceleration and the browser based user interface. Theseinterfaces must be attached to dierent

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