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last change: June 08, 2020

The Vienna Internet eXchange

The Vienna Internet Exchange (VIX) is a neutral, redundant and highly available Internet Exchange Point (IXP) connecting about 150 peering participants from Austria and around the world.

Our participants are large as well as small network operators: internet service providers, content providers, science networks and many others (see VIX Participation). Many network operators are peering at several IXPs in various countries. Each participating organization chooses its respective connection bandwidth.

What is an Internet Exchange Point (IXP)?

An IXP offers its participants shortcuts for delivering their data from one network to the other. Instead of routing data through their upstream connectivity providers, and thus sometimes all around the globe, participants can keep much of their data exchange local. Shorter paths mean less delays and quicker data delivery. Also, an IXP

  • enhances redundancy for connections to other participants' networks,
  • reduces dependence on commercial transit provider,
  • distributes the data load more evenly for network operators who peer at several IXPs, thus relieving the international transit lines.

If something goes wrong and an IXP stops working the data will simply take other routes from source to destination. It may take longer to get there; but get there it will. That is because IXPs do not offer actual internet access, i.e. data transit. They offer connectivity for data exchange among peers. Each participant will need some sort of upstream provider in addition to the IXP connection.

For more explanations see the readily understandable movie "The Internet Revealed: A Film About IXPs".

About VIX

VIX Logo
Euro-IX Logo

The Vienna Internet eXchange (VIX) is operated by the Vienna University Computer Center since 1996. It is a neutral, robust, high-performance peering infrastructure and serves its participants for the exchange of Internet traffic at the national and international level.

As a founding member of the Euro-IX Association, VIX has been developing its policies and technologies according to European Best Current Practices.

  • VIX participants may connect to VIX at one, two or all three locations. The redundant VIX infrastructure at all sites is provided and operated by the University of Vienna.
  • VIX also offers remote peering options for participants from other regions if they do not want to operate their routers in Vienna.
  • VIX participants need to agree on bilateral peering arrangements for traffic exchange. However, there is no obligation to exchange traffic with all other participants.
  • The required routing protocol for peerings is BGP4. The appropriate routing registry for the documentation of VIX peerings is the RIPE Database. Furthermore, the use of PeeringDB is recommended.
  • Currently, Switched Ethernet (10GBASE-LR, 100GBASE-LR4) is used as common exchange medium (see Technology).

Information about how to connect to VIX can be found at VIX Participation.