> ## 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.

# Transit Gateway CSP Related Settings

> Configuration settings for Transit Gateway CSP-related features in the Aviatrix platform.

This section describes the cloud service provider related settings for a Transit Gateway.

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## Summarize CIDR(s) to AWS TGW

Enable this setting to limit routes propagated to TGW to only three RFC 1918 CIDRs and specific non-RFC 1918 CIDRs. Limiting routes saves route propagation time.

Leave this setting disabled (the default setting) to maintain better segmentation behavior without improving performance.

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## AWS TGW Edge Segmentation

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AWS TGW Edge Segmentation allows you to further specify on each AWS TGW Aviatrix \_Edge\_Domain connection which domain the Transit Gateway can communicate with.

<Note>
  This feature is not available for Transit Gateways that have FireNet added, or have Network Segmentation enabled.
</Note>

After you turn On this option you can build domain connection policies to specify which Network Domain this AWS TGW Aviatrix\_Edge\_Domain connection can communicate with.

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For more information, see [TGW Edge Segmentation](https://docs.aviatrix.com/documentation/latest/network/tgw-edge-segmentation.html).

## Configuring CSP Settings

## Configuring Transit Gateway CSP Related Settings

1. In Aviatrix CoPilot, go to *Cloud Fabric* > *Gateways* > *Transit Gateways* tab.
2. In the table, locate and select the Transit Gateway you want to edit.
3. Go to the Transit Gateway's *Settings* tab.
4. Expand the *CSP Settings* section.
5. (optional) Toggle *Summarize CIDR(s) to AWS TGW* to *On*.
6. Follow the instructions to [set up AWS TGW Edge Segmentation](https://docs.aviatrix.com/documentation/latest/network/tgw-edge-segmentation.html).