Network-Engineering | 3 min read

Resolving IPv4 Addressing Issues: The Success Story of Leucom

ngworx Team
May 2020
written by Vera Freitas
Online and Content Marketing Specialist

Leucom is facing the same challenge with its cable and fiber optic network that makes life difficult for many other ISPs:

As IT director Christoph Tobler notes, Leucom is slowly running out of IPv4 addresses. Obtaining addresses from RIPE is no longer possible, purchasing used ones is dodgy in the best case and acquiring a company that still has free IPv4 addresses is like finding a needle in a haystack.

Carrier-grade NAT solves address problem

Leucom has concluded that Carrier-Grade NAT (CGN) would be the optimal solution. With CGN the provider no longer assigns a public but rather a private IPv4 address to its customers. A CGN gateway at the provider translates this private address into a public one for access to the Internet, with several customers sharing one of the rare public addresses.

During the evaluation process, the IT director came across Thunder CGN from A10 Networks and was immediately convinced. “The manufacturer focuses entirely on CGN and other specialized technologies such as Application Delivery, DDoS Protection and IPv6 Transition.”

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High-performance CGN infrastructure

“The chemistry has been right from the beginning, “says Tobler enthusiastically. Everything ran at top speed: in a short time, 3000 customers had already migrated to the new CGN environment. Business Development Manager Noam Suisa from ngworx sated: “All project partners agreed immediately. We are delighted that this project was completed swiftly and efficiently.” Less than one percent of customers that were migrated were facing difficulties that were resolved in no time. Most customers experienced a seamless transition and did not notice anything at all. This was the most important goal of Leucom.

The complete migration to IPv6 with its extensive address space would indeed solve the IPv4 scarcity problem. According to Christoph Tobler, however, this would not be opportune for Leucom: “The changeover would be very complex, and we could not yet implement everything we need with the current possibilities.”

Leucom currently operates two Thunder CGN units. Should one fail, the other takes over the routing of the defective unit in the short term. The appliances are located in Zurich, where the connection of their network to the Internet backbone takes place. For the future, Leucom plans a third device at the Frauenfeld site. However, this would not be necessary for performance reasons: At the moment, the CPU load of the appliances is just five percent. According to the A10, a Thunder CGN appliance can handle as many as 15,000 customers – so Leucom can easily grow until its existing CGN gateways reach their performance limits. And with the other features of the Thunder CGN platform, which Leucom has not yet used, the provider is well prepared for a future migration to IPv6.

A10 Thunder CGN – high-performance Carriergrade NAT

A10 Networks’ provides with the IPv4 Scaling and IPv6 Transition technology Thunder CGN a superior, high-performance, carrier-grade networking platform from IPv4 to IPv6. Flexible carrier-grade NAT and other innovative features make it possible to extend the lifecycle of the IPv4 infrastructure and provide time to prepare carefully for the IPv6 transition.

ngworx Team
May 2020
written by Vera Freitas
Online and Content Marketing Specialist

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