Configure BGP on the company’s router with a keep-alive to 300 ms and the BGP hold timer to 900 ms.

Enable Bidirectional Forwarding Detection (BFD) on the company’s router with a detection minimum interval of 300 ms and a BFD liveness detection multiplier of 3.

Enable Dead Peer Detection (DPD) on the company’s router with a detection minimum interval of 300 ms and a DPD liveliness detection multiplier of 3.

Enable Bidirectional Forwarding Detection (BFD) echo mode on the company’s router and disable sending the Internet Control Message Protocol (ICMP) IP packet requests.

Create a CloudFormation templates with Amazon EC2 resources that rely on cfn-init and cfn-signals to inform the stack of available CIDR ranges.

Create a CloudFormation template with a custom resource that analyzes traffic activity in VPC Flow Logs and reports on available CIDR ranges.

Create a CloudFormation template that references the Fn::Cidr intrinsic function within a subnet resource to select an available CIDR range.

Create a CloudFormation template with a custom resource that uses AWS Lambda and Amazon DynamoDB to manage available CIDR ranges.

1-Gbps Multi Mode Fiber Interface, 802.1Q VLAN, Peer IP Address, BGP Session with MD5.

1-Gbps Single Mode Fiber Interface, 802.1Q VLAN, Peer IP Address, BGP Session with MD5.

IPsec Parameters, Pre-Shared key, Peer IP Address, BGP Session with MD5

BGP Session with MD5, 802.1Q VLAN, Route-Map, Prefix List, IPsec encrypted GRE Tunnel