Attachment Overview

You can create an attachment to attach a network instance to an enterprise router. The attachment type varies by the type of network instance.

Figure 1 Attachments

**Table 1** Attachments
Attachment Type	Network Instance	Creating Attachments	Viewing Attachments	Deleting Attachments
VPC attachment	VPC	Creating a VPC Attachment	Viewing an Attachment	Deleting a VPC Attachment
Virtual gateway attachment	Virtual gateway of Direct Connect	Creating a Virtual Gateway Attachment	Viewing an Attachment	Deleting a Virtual Gateway Attachment
VPN gateway attachment	VPN gateway	Creating a VPN Gateway Attachment	Viewing an Attachment	Deleting a VPN Gateway Attachment
Peering connection attachment	Enterprise routers in other regions. You can add enterprise routers from different regions to a central network as attachments. Each connection between enterprise routers is a peering connection attachment.	Creating a Peering Connection Attachment	Viewing an Attachment	Deleting a Peering Connection Attachment
Global DC gateway attachment	Global DC gateway in Direct Connect	Creating a Global DC Gateway Attachment	Viewing an Attachment	Deleting a Global DC Gateway Attachment
CFW instance attachment	VPC border firewall	Creating a CFW Instance Attachment	Viewing an Attachment	Deleting a CFW Instance Attachment

If you need to set up a hybrid cloud network, it is recommended that you use Enterprise Router and Direct Connect Global DC Gateway.

From May 2024, enterprise routers and Direct Connect virtual gateways cannot be used together to set up a hybrid cloud network. Existing networks that are set up using enterprise routers and Direct Connect virtual gateways are not affected.

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