> ## Documentation Index
> Fetch the complete documentation index at: https://docs.aviatrix.com/llms.txt
> Use this file to discover all available pages before exploring further.

# High Performance Encryption for GCP

> Because GCP network infrastructure is different from AWS and Azure, Aviatrix High Performance Encryption mode for GCP differs from AWS and Azure in the following ways:

Because GCP network infrastructure is different from AWS and Azure, Aviatrix
High Performance Encryption mode for GCP differs from AWS and Azure in the
following ways:

* Only Spoke and Transit Gateway types are supported.
* Only Multicloud Transit functionality is supported with High Performance
  Encryption Mode gateways
* The Advertise Transit VPC Network CIDR(s) feature is not supported with a High
  Performance Encryption Mode Gateway.
* GCP High Performance Encryption Mode supports only ActiveMesh 2.0.

For GCP High Performance Encryption, MTU is 1460 and MSS is 1330 bytes.

## Subnet Prefix Length for GCP High Performance Encryption Mode

For GCP High Performance Encryption, the gateway subnet prefix length cannot be
greater than /24.

<Note>
  Aviatrix highly recommends that customers utilize a subnet exclusively for
  deploying High Performance Encryption enabled gateway without any other
  instances in the subnet.
</Note>

* <a href={"/docs/enterprise/" + "10.1" + "/reference/gateways/hpe-perf-benchmark"}>High Performance Encryption Performance Benchmarks</a>
* <a href={"/docs/enterprise/" + "10.1" + "/concepts-architectures/components/security/transit-segmentation-faq"}>About Transit Network Segmentation</a>