Summary

  • At RIPE 93, Eric Andrei Băleanu traced InterLAN-IX from neighbourhood Ethernet networks to one exchange fabric extended across Romania.
  • Regional points of presence let operators connect closer to home, but inter-PoP links still need capacity and redundancy. The talk says the platform adds cost and does not automatically lower latency.

Nine regional sites on one peering fabric make a satisfying map. The more expensive part sits between the dots: transport capacity, backup paths and the people who have to keep them working.

That is the useful tension in Băleanu’s RIPE 93 account of InterLAN-IX. The exchange began before its founders had settled on a formal exchange design. In the late 1990s and early 2000s, Romanian users linked computers between apartment buildings for chat, games and file sharing. Internet access was costly and difficult to obtain, so the local networks began sharing permanent connections. Several grew into small Internet providers and started exchanging traffic directly instead of sending much of it through upstream providers outside Romania.

Around 20 Bucharest operators met in the early 2000s to organize those links. “InterLAN” came from “interconnecting local area networks.” Asociația Interlan was founded in 2005 with about 20 members, Băleanu said, and joined Euro-IX in 2008. The official association page identifies him as its president; RIPE’s speaker biography says he leads InterLAN-IX and also operates a regional ISP.

The scale of the early market was not just conference-room nostalgia. ANCOM’s 2006 annual report records 1,412 operational providers of Internet-access services at year-end, including 1,101 with broadband offers. That is a crowded field of small and local networks, the kind of market in which an exchange can be useful before it looks impressive on a national map.

Geography made Bucharest both the centre and the problem. Băleanu said many regional operators were hundreds of kilometres away. They could build long links to the capital or rely on an upstream provider to reach the exchange; he described both routes as expensive. A separate local exchange was another option, but some towns had only three or four potential participants—too few, in his view, to support a useful independent fabric.

InterLAN-IX extended its existing Layer 2 platform instead. A regional operator could attach locally and peer across the same VLAN with networks at other locations. Băleanu reported nine Romanian points of presence, with no more than five participants at each, and more than 150 connected networks from Romania and neighbouring countries. He also described Frankfurt and Sofia as international sites, with the same port prices in Bucharest, Frankfurt and Sofia at the time of the talk.

The architecture trades one kind of distance for another. It reduces the distance an operator must travel to join the exchange, while InterLAN must carry traffic between the points of presence. Băleanu was explicit about that bill: the inter-PoP links need enough capacity, redundancy matters when transport fails, and the expanded network costs money. A wider footprint does not automatically make traffic faster; topology and operating design decide that.

This is Running-Code Primacy in a practical register. Heng Lu’s Note 65 asks coordination systems to answer to the minimum technical work running networks need. Băleanu’s story starts with that work: neighbours wanted to exchange locally, small operators wanted direct peering, and the platform changed as those networks grew. Its test is not how many pins fit on the map. It is whether operators can reach useful peers and whether the shared paths hold up under load and failure.

The talk publishes no site-level traffic matrix, link-capacity figures, route map, failure history or before-and-after latency series. Those records would show whether the design’s geographic reach also produces measurable performance and resilience gains.

Primary records: RIPE 93 session · official transcript · ANCOM 2006 annual report · Asociația Interlan · InterLAN-IX platform · Heng Lu, Note 65.