Routing in Cloud Computing

Cloud computing has substantially extended the spectrum and scope of IT services by acting as a conduit between clients and their cloud computing service providers. For cloud computing, the pan-routing platform delivers high-speed, dependable, scalable and simple-to-use wide-area data transmission platforms.

Routing is the process of determining the paths data packets must take to reach their destination. Developers established a routing table throughout this operation, containing information about the paths data packets take. Techies use different routing algorithms to determine the path an incoming data packet should take to reach its destination as effectively as possible.

The cloud router aims to switch routes between on-premises and Virtual Private Cloud Network or two Virtual Private Cloud Networks. It uses the " Border Gateway Protocol to communicate routing information across networks.

By employing BGP, changes in the topology of a Virtual Private Cloud Network are automatically propagated to its partner network and vice versa. Therefore, users do not need to establish static routes manually every time the network changes.

Classification of Routing Algorithm

There are two types of cloud computing platforms:

● Adaptive Algorithms - These algorithms alter their routing decisions in response to changes in network topology or traffic load. The network's topology and traffic reflect the changes in routing decisions. These, also known as dynamic routing, determine routes based on dynamic information, such as current topology, load, latency, etc. Distance, hop count, and expected transit time are the optimization parameters.
● Non-Adaptive Algorithms — These algorithms do not modify their routing decisions after they are chosen. They are also known as static routing since developers compute the route to be taken ahead of time and download it to routers when they power up.

Why Use a Cloud Router?

The VPN can only be set up using static routes without a cloud router. We must identify each subnet we wish to connect in the VPN tunnel setup in the static routes. This is only suitable for usage in a small network with a stable topology.

The following are the drawbacks of utilizing static routes:

● Programmers must maintain and create a routing table.
● When either side of the network's configuration changes, they must delete and create routes manually.
● If a link fails, it cannot automatically divert traffic or build a new connection to replace the lost one.

Dynamic routing is advised to eliminate all of these costs, which is where the cloud router comes in.

Dynamic Routing Operation

The cloud router is the foundation of dynamic routing. A unique BGP and ASN IP address are required to configure a Cloud Router. This BGP is in charge of dynamically sharing route information across networks. BGP automatically detects topological changes in networks.

The following are the advantages of dynamic routing:

● If a link breaks, it immediately reroutes traffic.
● Changes in network topology in either network are automatically detected.
● There is no need for route table maintainance, and it is appropriate for any size network.

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