AWS Certified Solutions Architect - Professional (#202)

An organization is planning to extend their data center by connecting their DC with the AWS VPC using the VPN gateway. The organization is setting up a dynamically routed VPN connection. Which of the below mentioned answers is not required to setup this configuration?

The type of customer gateway, such as Cisco ASA, Juniper J-Series, Juniper SSG, Yamaha.
Elastic IP ranges that the organization wants to advertise over the VPN connection to the VPC.
Internet-routable IP address (static) of the customer gateway's external interface.
Border Gateway Protocol (BGP) Autonomous System Number (ASN) of the customer gateway.