> ## 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. # Create Edge Transit Gateway Attachments > An Edge Transit Gateway can be attached to multiple Aviatrix gateways for hybrid, multicloud, and LAN connectivity. An Edge Transit Gateway can be attached to multiple Aviatrix gateways for hybrid, multicloud, and LAN connectivity. * For encrypted connectivity across network service providers (NSPs), such as Equinix and Megaport, and Datacenter fabric, [create an Edge Transit Gateway to Edge Transit Gateway attachment](#attach-an-edge-transit-gateway-to-edge-transit-gateway). * For encrypted connectivity to cloud, [create an Edge Transit Gateway to a Transit Gateway attachment](#attach-an-edge-transit-gateway-to-transit-gateway). * For encrypted connectivity to remote site or on-premises, [create an Edge Transit Gateway to an Edge Spoke Gateway attachment](#attach-an-edge-transit-gateway-to-edge-spoke-gateway). ## Attach an Edge Transit Gateway to Edge Transit Gateway If you want to use Jumbo Frames for the attachment peering connection between the Edge Gateways, make sure to enable Jumbo Frames on the Edge Gateways before you create the attachment. To attach an Edge Transit Gateway to an Edge Transit Gateway: 1. In Aviatrix CoPilot, go to **Cloud Fabric > Hybrid Cloud > Edge Gateways > Transit Gateways** tab. 2. Locate the Edge Transit Gateway to which you want to attach an Edge Transit Gateway, then click the **Manage Gateway Attachments** icon manage attachment link icon on the right side of the row. 3. In **Manage Gateway Attachments > Transit Gateway** tab, click **+ Attachment** and provide the following information. | Field | Description | | ----------------------------- | ------------------------------------------------------------------------------- | | Transit Gateway | The remote Edge Transit Gateway to attach. | | Local Edge Gateway Interface | The WAN interface of the local Edge Transit Gateway to use for the attachment. | | Remote Edge Gateway Interface | The WAN interface of the remote Edge Transit Gateway to use for the attachment. | In the **Advanced** section, enter or select the following: | Field | Description | | ---------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Attach Over | The connection between the Edge gateways. It can be over a **Private Network** or the **Public Network**. On the Aviatrix Edge Platform (AEP), Edge Transit Gateway to Edge Transit Gateway peering for high performance encryption is supported over private and public networks. On the Equinix and Megaport platforms, Edge Transit to Edge Transit peering for high performance encryption is supported over private network only. Regular encryption is supported over both private and public networks for all environments. | | Jumbo Frame | Jumbo Frame improves performance for the connection between the Edge gateways. Jumbo Frame is applicable when the attachment is over a Private network. To use Jumbo Frames for the connection, set **Jumbo Frame** toggle to **On**. | | ActiveMesh | ActiveMesh enables full mesh peering between the local and remote Edge gateways. For full mesh peering, set **ActiveMesh** toggle **On**. | | Number of HPE Tunnels | The number of High Performance Encryption (HPE) tunnels to create for the attachment peering. **Single** creates a single tunnel. **Maximum** creates the maximum tunnels based on the gateway sizes and the number of interface IPs on the peering gateway. This option is available only for connection over a Private network. **Custom** allows you to specify the number of tunnels to create. | | Excluded Network CIDRs | If you want to exclude CIDRs from the local Edge Gateway from being propagated to the remote Edge Gateway, set Excluded Network CIDRs toggle to **On**. In **Excluded Network CIDRs** field, enter the CIDRs to be excluded. | 4. To attach the Edge Transit Gateway to another Edge Transit Gateway, click **+ Attachment** again and provide the required information. You can attach an Edge Transit Gateway to multiple Edge Transit Gateways. Each attachment can be configured with different parameters, such as connecting WAN interfaces, connection over private or public networks, and enabling high-performance encryption. 5. Click **Save**. ## Attach an Edge Transit Gateway to Transit Gateway To create a High Performance Encryption (HPE) attachment, make sure the Transit Gateway in the cloud is created with HPE enabled. If you want to use Jumbo Frames for the attachment, make sure to enable Jumbo Frames on the Edge Transit Gateway and the Transit Gateway in the cloud before you create the attachment. To attach an Edge Transit Gateway to a Transit Gateway in the cloud: 1. In Aviatrix CoPilot, go to **Cloud Fabric > Hybrid Cloud > Edge Gateways > Transit Gateways** tab. 2. Locate the Edge Transit Gateway to which you want to attach the Transit Gateway, then click the **Manage Gateway Attachments** icon manage attachment link icon on the right side of the row. 3. In **Manage Gateway Attachments > Transit Gateway** tab, click **+ Attachment** and provide the following information. | Field | Description | | ---------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Transit Gateway | The Transit Gateway in cloud to attach. | | Local Edge Gateway Interface | The WAN interface of the local Edge Transit Gateway to use for the attachment. | | Attach Over | The connection between the Edge gateways. It can be over a **Private Network** or the **Public Network**. | | Jumbo Frame | Jumbo Frame improves performance for the connection between the Edge gateways. Jumbo Frame is applicable when the attachment is over a Private network. To use Jumbo Frames for the connection, set **Jumbo Frame** toggle to **On**. | | Number of HPE Tunnels | The number of High Performance Encryption (HPE) tunnels to create for the attachment peering. **Single** creates a single tunnel. **Maximum** creates the maximum tunnels based on the gateway sizes and the number of interface IPs on the peering gateway. This option is available only for connection over a Private network. **Custom** allows you to specify the number of tunnels to create. | | Excluded Network CIDRs | If you want to exclude CIDRs from the local Edge Gateway from being propagated to the remote Edge Gateway, set Excluded Network CIDRs toggle to **On**. In **Excluded Network CIDRs** field, enter the CIDRs to be excluded. | 4. To attach the Edge Transit Gateway to another Transit Gateway, click **+ Attachment** again and provide the required information. You can attach an Edge Transit Gateway to multiple Transit Gateways. Each attachment can be configured with different parameters, such as connecting WAN interfaces, connection over private or public networks, and enabling high-performance encryption. 5. Click **Save**. ## Attach an Edge Transit Gateway to Edge Spoke Gateway If you want to use Jumbo Frames for the attachment peering connection between the Edge Gateways, make sure to enable Jumbo Frames on the Edge Gateways before you create the attachment. To attach an Edge Transit Gateway to an Edge Spoke Gateway: 1. In Aviatrix CoPilot, go to **Cloud Fabric > Hybrid Cloud > Edge Gateways > Transit Gateways** tab. 2. Locate the Edge Transit Gateway to which you want to attach the Edge Spoke Gateway, then click the **Manage Gateway Attachments** icon manage attachment link icon on the right side of the row. 3. In **Manage Gateway Attachments > Spoke Gateway** tab, click **+ Attachment** and provide the following information. | Field | Description | | ----------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Spoke Gateway | The remote Edge Spoke Gateway to attach. | | Local Edge Gateway Interface | The WAN interface of the local Edge Transit Gateway to use for the attachment. | | Remote Edge Gateway Interface | The WAN interface of the remote Edge Spoke Gateway to use for the attachment. | | Attach Over | The connection between the Edge gateways. It can be over a **Private Network** or the **Public Network**. On the Aviatrix Edge Platform (AEP), Edge Transit Gateway to Edge Spoke Gateway peering for high performance encryption over private and public networks is supported. On the Equinix and Megaport platforms, Edge Transit Gateway to Edge Spoke Gateway peering for high performance encryption is supported over private networks only. Regular encryption is supported over both private and public networks for all environments. | | Jumbo Frame | Jumbo Frame improves performance for the connection between the Edge gateways. Jumbo Frame is applicable when the attachment is over a Private network. To use Jumbo Frames for the connection, set **Jumbo Frame** toggle to **On**. | | ActiveMesh | ActiveMesh enables full mesh peering between the local and remote Edge gateways. For full mesh peering, set **ActiveMesh** toggle **On**. | | Number of HPE Tunnels | The number of High Performance Encryption (HPE) tunnels to create for the attachment peering. **Single** creates a single tunnel. **Maximum** creates the maximum tunnels based on the gateway sizes and the number of interface IPs on the peering gateway. This option is available only for connection over a Private network. **Custom** allows you to specify the number of tunnels to create. | 4. To attach the Edge Transit Gateway to another Edge Spoke Gateway, click **+ Attachment** again and provide the required information. You can attach an Edge Transit Gateway to multiple Spoke Gateways. Each attachment can be configured with different parameters, such as connecting WAN interfaces, connection over private or public networks, and enabling high-performance encryption. 5. Click **Save**.