Amazon Web Services – Transit VPC

Amazon Web Services Transit vpc: Amazon Web Services (AWS) infrastructure and networks can be connected to each other and other non-AWS infrastructures using the Amazon Web Services VPC i.e. Amazon Virtual Private Cloud. Before we go on any further, you should know what exactly an Amazon VPC is.

Amazon Virtual Private Cloud allows you to allocate a section of the Amazon Web Services (AWS) Cloud which is logically isolated. The AWS Cloud allows you to launch AWS resources in a virtually defined network. This way the customer has total control over the networking environment, meaning you can create subnets, select your IP address range, configure route tables, network gateways and so on. So you can customize the networking configuration for your Amazon Web Services Transit vpc. Other than that, Amazon VPC is secure, simple, scalable and reliable in all terms.

Amazon Web Service Transit VPC: how it works

Amazon VPC also enables the customers to create some virtual networks. Now you can connect these networks to each other using a transit VPC. Here’s how it works. You create a transit VPC which then serves as a global network transit center. It reduces the number of connections needed to connect multiple networks and simplifies network management. Since this design of the transit VPC doesn’t require an establishment of a physical presence in a colocation hub or deployment of a physical network gear, it saves time and efforts while minimizing the expenses.

You create a transit VPC which then serves as a global network transit center. It reduces the number of connections needed to connect multiple networks and simplifies network management. Since this design of the Amazon Web Services transit VPC doesn’t require an establishment of a physical presence in a colocation hub or deployment of a physical network gear, it saves time and efforts while minimizing the expenses.

The transit VPC design is a typical hub and spoke network topology where the remote VPC’S access each other and other remote networks through the transit VPC. The design brings forward a solution that we will discuss further in the article, which creates on the AWS Cloud, a Cisco-base transit VPC.

The New AWS Transit VPC solution

Now I would like to tell you about the new Amazon Web Services (AWS) Solution.
This new solution, just like the AWS Quick Starts, was also built by the AWS Solutions Architects. It also incorporates in itself the best practices to ensure high availability and security.

This new Amazon Web Services Transit VPC Solution enables and teaches the customers to implement Transit VPC, which is a critical networking construct. Multiple Virtual Private Clouds (VPCs) which might be geographically dissimilar and executing in different AWS accounts can be connected to a typical VPC using the transit C solution.

Here the standard AWS VPC will act as a global network transit center. This network topology, which will use the current VPC as a hub will reduce the number of connections that you’ll require to set up & manage.

This in-turn will make the network management simple. Also since it is implemented virtually, it doesn’t need any physical network gear or a physical presence in a colocation transit hub.
So, if you will look at the network topology, you will see that the transit Amazon Web Services transit VPC will act as a central hub surrounded by corporate data centers, additional spoke VPCs, and other networks.

However, the transit AWS Transit VPC supports the following crucial use cases:
Private Networking– It is the one where you can build a private network ranges through two or more AWS Regions.
Shared Connectivity– In this one multiple Virtual Private Cloud can share connections to other clouds, neighboring networks, and data centers.
Cross- Account AWS Usage– The Virtual Private Clouds and the AWS resources within these can exist in multiple AWS accounts.
The solution uses associated AWS Cloud Formation stack to launch and put together all of the AWS resources. It provides you with three throughput choices starting from five hundred Mbps to two Gbps, every choice executed over a pair of connections for top availability.
The stack makes use of the Cisco Cloud Services Router (CSR) that is currently accessible in AWS Marketplace. You’ll be able to use your existing CSR licenses (the BYOL model) otherwise you can pay for the CSR usage on an hourly basis.

The price to run a Amazon Web Services transit VPC relies on the throughput choice and licensing model that you had opted for, and ranges from $0.21 to $8.40 per hour, with an extra price (for AWS resources) of $0.10 per hour for every spoke VPC. There’s an additional cost of $1 per month for an AWS Key Management Service (KMS) client master key that is solution specific. All of these costs are exclusive of transit network prices. The template installs and uses a pair of AWS Lambda functions in a creative way!

The VGW Poller function runs each minute. It scans all of the AWS Regions within the account, searching for suitably tagged Virtual Private Gateways in spoke VPCs that don’t have a VPN connection. Once it finds one, it creates (if necessary) the corresponding client gateway and also the VPN connections to the CSR, and saves info in an S3 bucket.

The Cisco Configurator function is triggered by the Put event on the bucket. It parses the VPN connection info and generates the required configuration files, then pushes them to the CSR instances using SSH. It enables the VPN tunnels to come back up and (via the magic of BGP), neighbor relationships are established with the spoke VPCs.

By using Lambda in such a way, new spoke VPCs can be bought on-line rapidly without the overhead to keep an underutilized EC2 instance up and running.

 

Written by

Sudhi Seshachala

Sudhi is part of Cloud Technology Partners & is a trusted advisor and strategic consultant to many C level executives and IT Directors. He brings 18+ years diverse experience covering software, IT operations, cloud technologies, and management. Have led several global teams in HP, Sun/Oracle, SeeBeyond and few startups to deliver scalable and highly available business/technology products and solutions. He has expertise in systems management, monitoring and integrated SaaS and on-premise applications addressing a wide range of business problems.

Related Posts

— February 11, 2019

WaitCondition Controls the Pace of AWS CloudFormation Templates

AWS's WaitCondition can be used with CloudFormation templates to ensure required resources are running.As you may already be aware, AWS CloudFormation is used for infrastructure automation by allowing you to write JSON templates to automatically install, configure, and bootstrap your ...

Read more
  • AWS
— January 24, 2019

The 9 AWS Certifications: Which is Right for You and Your Team?

As companies increasingly shift workloads to the public cloud, cloud computing has moved from a nice-to-have to a core competency in the enterprise. This shift requires a new set of skills to design, deploy, and manage applications in the cloud.As the market leader and most mature p...

Read more
  • AWS
  • AWS certifications
— November 28, 2018

Two New EC2 Instance Types Announced at AWS re:Invent 2018 – Monday Night Live

The announcements at re:Invent just keep on coming! Let’s look at what benefits these two new EC2 instance types offer and how these two new instances could be of benefit to you. If you're not too familiar with Amazon EC2, you might want to familiarize yourself by creating your first Am...

Read more
  • AWS
  • EC2
  • re:Invent 2018
— November 21, 2018

Google Cloud Certification: Preparation and Prerequisites

Google Cloud Platform (GCP) has evolved from being a niche player to a serious competitor to Amazon Web Services and Microsoft Azure. In 2018, research firm Gartner placed Google in the Leaders quadrant in its Magic Quadrant for Cloud Infrastructure as a Service for the first time. In t...

Read more
  • AWS
  • Azure
  • Google Cloud
Khash Nakhostin
— November 13, 2018

Understanding AWS VPC Egress Filtering Methods

In order to understand AWS VPC egress filtering methods, you first need to understand that security on AWS is governed by a shared responsibility model where both vendor and subscriber have various operational responsibilities. AWS assumes responsibility for the underlying infrastructur...

Read more
  • Aviatrix
  • AWS
  • VPC
— November 10, 2018

S3 FTP: Build a Reliable and Inexpensive FTP Server Using Amazon’s S3

Is it possible to create an S3 FTP file backup/transfer solution, minimizing associated file storage and capacity planning administration headache?FTP (File Transfer Protocol) is a fast and convenient way to transfer large files over the Internet. You might, at some point, have conf...

Read more
  • Amazon S3
  • AWS
— October 18, 2018

Microservices Architecture: Advantages and Drawbacks

Microservices are a way of breaking large software projects into loosely coupled modules, which communicate with each other through simple Application Programming Interfaces (APIs).Microservices have become increasingly popular over the past few years. The modular architectural style,...

Read more
  • AWS
  • Microservices
— October 2, 2018

What Are Best Practices for Tagging AWS Resources?

There are many use cases for tags, but what are the best practices for tagging AWS resources? In order for your organization to effectively manage resources (and your monthly AWS bill), you need to implement and adopt a thoughtful tagging strategy that makes sense for your business. The...

Read more
  • AWS
  • cost optimization
— September 26, 2018

How to Optimize Amazon S3 Performance

Amazon S3 is the most common storage options for many organizations, being object storage it is used for a wide variety of data types, from the smallest objects to huge datasets. All in all, Amazon S3 is a great service to store a wide scope of data types in a highly available and resil...

Read more
  • Amazon S3
  • AWS
— September 18, 2018

How to Optimize Cloud Costs with Spot Instances: New on Cloud Academy

One of the main promises of cloud computing is access to nearly endless capacity. However, it doesn’t come cheap. With the introduction of Spot Instances for Amazon Web Services’ Elastic Compute Cloud (AWS EC2) in 2009, spot instances have been a way for major cloud providers to sell sp...

Read more
  • AWS
  • Azure
  • Google Cloud
  • SpotInst
— August 23, 2018

What are the Benefits of Machine Learning in the Cloud?

A Comparison of Machine Learning Services on AWS, Azure, and Google CloudArtificial intelligence and machine learning are steadily making their way into enterprise applications in areas such as customer support, fraud detection, and business intelligence. There is every reason to beli...

Read more
  • AWS
  • Azure
  • Google Cloud
  • Machine Learning
— August 17, 2018

How to Use AWS CLI

The AWS Command Line Interface (CLI) is for managing your AWS services from a terminal session on your own client, allowing you to control and configure multiple AWS services.So you’ve been using AWS for awhile and finally feel comfortable clicking your way through all the services....

Read more
  • AWS