AWS Classroomnotes 06/Aug/2022

Cloud Networking Pre-requisites

  • All the networks created by us in any cloud are private by default.
  • Enabling public ip to the virtual machine
    • CSP will have pool of public ip addresses out of which one ip is selected randomly and assigned to your network interface.
    • When the vm is shutdown, the public ip will be released and it will go back to the pool.
    • If we want the public ip to be same even after stopping and starting the vm, we need to make static public ip reservations.

Auto Scaling (Elasticity)

  • When the number of servers hosting the customer facing applications over internet are scaled, each server gets its own private ip. Public ip also can be allocated
  • Questions:
    • Do we really need a public ip for each vm
    • What is that public which customers are going to use to access the application.
  • OSI Model of Networking
  • In the above case, the same application is scaled so we can use a Load Balancer which is Layer 4 aware
  • Load Balancer performs
    • Health checks/probes to ensure whether the service is up or not.
    • For Healthy servers, the traffic will be forwarded in Round Robin Fashion
  • Now, The vm’s can be private and its enough if the load balancer has public ip.
  • Layer 7:

Hybrid Networking

  • Site-to-Site VPN
  • Next Steps:
    • Multiples sites to a network vpn connection.

Disaster Recovery and Multi Region Setups

  • Active-Passive:
  • Active-Active:

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

About continuous learner

devops & cloud enthusiastic learner