Direct Connect Virtual Interfaces

Here, we will learn about Direct Connect Virtual Interfaces.

Must create any below, virtual interfaces to use AWS Direct Connect connection.

Private virtual interface: used to access an VPC using private IP addresses.
Public virtual interface: can access all AWS public services using public IP addresses.
Transit virtual interface: used to access one or more Amazon VPC Transit Gateways associated with Direct Connect gateways.
A connection of less than 1 Gbps supports only one virtual interface.

To create a virtual interface

Create a connection.
Create a link aggregation group (LAG) if having multiple connections that you want to treat as a single one.

Connection: connection or link aggregation group (LAG) for which creating the virtual interface.
Virtual interface name: A name for virtual interface.
(Private virtual interface only) Connection to: For connecting to a VPC in the same region, virtual private gateway for VPC.
VLAN: VLAN tag that’s not already in use on the connection. value be between 1 – 4094
Address family: BGP peering session is over IPv4 or IPv6.
Peer IP addresses: IP address ranges are assigned to each end of virtual interface for BGP peering session, as
- IPv4:
  - (Public virtual interface only) specify owning unique public IPv4 addresses.
  - (Private virtual interface only) generate private IPv4 addresses
- IPv6: Amazon automatically allocates a /125 IPv6 CIDR.
BGP information: public or private BGP ASN for side of BGP session.