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Direct Connect

Interconnecting on-premises data centers and VPCs

Creating a Virtual Interface

Scenarios

A Virtual Interface is a logical interface established over a Direct Connect (DC) Connection, enabling communication between your on-premises data center (IDC) and different Virtual Private Clouds (VPCs). It supports two routing modes: static routing and BGP routing. This example uses BGP routing.

Procedure

Click Create DC Virtual Interface.

Configure the Virtual Interface based on the table below.

Basic information

Parameters	Description	Sample value
Resource ownership	Select the account to which the Virtual Interface belongs. tip The feature of creating a Shared Virtual Interface for another account is currently in the beta stage. If you need a trial, please contact your account manager.	My account
Regions	Select the region where the Virtual Interface is deployed. It must be the same as the region of the DC Connection and the DC Gateway.	China (Beijing)
Name	Set a name for the Ethernet Virtual Interface.	VIF-ds123
DC Connection	Select the DC Connection and the Project it belongs to, to associate with the virtual interface.	default\|DAS123_port308_conn
Direct Connect Gateway	Select the Direct Connect Gateway and the Project it belongs to, to associate with the virtual interface.	default\|Dcg-123
Bandwidth limit	Enable bandwidth limit as needed. Enabling Bandwidth limit restricts the bandwidth of the virtual interface. Disabling Bandwidth limit means the virtual interface's bandwidth is unrestricted.	Check
Bandwidth cap	The maximum bandwidth after enabling bandwidth limit. The maximum bandwidth for the Virtual Interface cannot exceed the bandwidth of the associated DC Connection. Reasonably allocate bandwidth based on service needs.	10 Mbps

Interconnection information

Parameters	Description	Sample value
IPv4 interconnect IP	Type the IPv4 interconnect IP.	--
Cloud gateway peer IP	Set an IPv4 address and mask for the cloud DC gateway. You may customize the interconnect IP according to network planning, but confirm that the cloud gateway peer IP and your gateway peer IP are in the same CIDR block without duplication. Use a private IP address that does not conflict with cloud or on-premises IP addresses.	10.0.0.1/24
Your gateway IP	Set an IPv4 address and mask for the gateway on your on-premises data center. You may customize the interconnect IP according to network planning, but confirm that the cloud gateway peer IP and your gateway peer IP are in the same CIDR block without duplication. Use a private IP address that does not conflict with cloud or on-premises IP addresses.	10.0.0.2/24
VLAN ID	Set a VLAN ID for connecting to the data center. Confirm that this VLAN ID is unoccupied.	10

Routing information

Parameters	Description	Sample value
Route type	Supports two routing types: BGP routing and Static routing. This example uses BGP routing. BGP information (BGP Peer ASN, BGP key) cannot be modified after the virtual interface is successfully created.	BGP
Peer ASN	Enter the ASN for the IPv4 BGP peer. The valid ASN range is 1 to 4294960000. It must not be the same as the Direct Connect Gateway's ASN, nor can it be VolcanoEngine's ASN (137718).	46000
BGP key	Enter the BGP key for the IPv4 BGP Peer (This parameter only appears when the routing type is "BGP").	E0g5****8go1
Detection method	Select the detection method for the line.	Disable

tip

This example demonstrates only example values for required parameters. For more parameter details, see Creating a Virtual Interface. Example values are for reference only and have no practical significance.

After configuration, click Create to complete the creation.

At this point, the following resources have been requested: DC Connection DAS123_port308_conn, the Direct Connect Gateway dcgw-123, and Virtual Interface VIF-ds123. VIF-ds123 has been associated with both DAS123_port308_conn and dcgw-123.

What to do next

Attach a network instance

Configure on-premises routing and test connectivity

Last updated: 2026.08.24 11:30:45