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From the inception of data centers, there has been a need to standardize data transmission. At the current level of data transmission, we use something termed Ethernet VPN, or EVPN for short. EVPN, according to Juniper, is a network technology that utilizes a Layer 2 bridge in order to connect disparate networks together. When data centers were first developed, the topology was based on a couple of central links termed ‘God boxes’ that would be the point of entry and exit from the network into the wider world. The main issue that occurred was that this type of network setup had problems with cross-communication, usually because of its reliance upon Layer 2 networking. As things progressed, data centers started to move away from Layer 2 and adopt Layer 3 networking instead, which relied on networking IP’s for routing. The problem here was that Layer 3 added complexity to the system that relied on simplicity to operate. But how could Layer 2 be used despite its massive shortcomings?

Exploring Layer 2 More Directly

Layer 2 was designed to be an easier to use system of routing. It requires very little overhead and companies usually charge more for Layer 3 routing since it utilizes …

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