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Generic Routing Encapsulation

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Generic Routing Encapsulation

The GRE is a tunneling protocol that was originally developed by Cisco, and it can do a few more things than IP-in-IP tunneling.
For example, transport multicast traffic and IPv6 through a GRE tunnel. The GRE feature gives the ability to tunnel IPv4 packets through an IPv4 connection. As a result private distant IP networks can be connected through a public IP network with this feature.
A source device encapsulates a payload packet into IP packet and redirects them through local endpoint of the GRE tunnel to the distant host. When data packets are received by the remote GRE endpoint, they are decapsulated and routed to their final destination.
The major benefits of using GRE tunnels are as follows:
GRE tunnels make possible to connect internal subnets over an open network. GRE tunnels have no limitation on the types of traffic, which can traverse it. Also, it creates a routable interface and routing protocols can operate across it. It is important to validate the data transferred to ensure that all the data reached their destination as well as to reduce the chance of inject of unwanted data, such as malware.
It would not be possible without machine learning. It processes the data real-time and extracts important features.
Our team was responsible for implementing VLANs in sub-interface for GRE tunneling functionality in edge router for telecommunication vendor.

Piotr Mleczko - Chief Technology Officer, Lonsley

Monday, 13 March 2017