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Frequently Asked Questions (FAQs)

General


What is the Vienna Internet eXchange?
Who is connected to VIX?
What are the costs of a VIX participance?
If I order an additional connection at VIX, will the setup-fee be charged again?
Does the VIX support IPv6?

Requirements


Which requirements shall I fulfill to participate at VIX?
I do not have an own AS-Number, can I participate at VIX anyway?
What is BGP?
Why do I have to configure my Router with BGP, if I want to connect at VIX?
Is it possible to participate at VIX, without hosting my router at one of the VIX locations directly?
Can I buy upstream over the VIX?
Do I have a direct 10 Gbit connection to the Internet, if I connect to VIX with 10 Gbit?

Participance


What shall I do, if I want to participate at VIX?
What happens, when I sent the Connection Agreement to the Vienna Internet eXchange?
How do I order a patch at Interxion?

Technical


How do I set up a BGP-Test-Connection in the quarantine-VLAN?
What are Site-Specific Communities?
Why is it not allowed to use the Spanning Tree Protocol?
Why is only one MAC-Address at VIX allowed?
By changing the router-hardware at my VIX-connection, what should I consider?
Why does often "Invalid MD5 digest from 193.203.0.251" show up in the loglines when peering with the routeservers?
How can I contact the VIX-Network Operations Center (NOC)?

Web Portal


What features does the web portal offer?
Who can apply for a portal account?
How can I apply for a portal account?
Is there a list of IP-Addresses, MAC-Addresses and related providers at VIX?
One of our peering is down. Can I get informations if this peer has problems in general?
Can I find out how much traffic I transfer to other peers?
I have forgotten my login data. What shall I do?

General

What is the Vienna Internet eXchange?

The Vienna Internet eXchange (VIX) is a neutral peering infrastructure for National Research & Education Networks (NRENs), Internet Service Providers (ISPs), Content Providers and Content Delivery Networks in Austria and the Central and Eastern European Region for the exchange of Internet traffic at the national and international level. The University of Vienna provides and operates a redundant VIX infrastructure at two sites in Vienna, ensuring a neutral, robust and non-profit peering environment, for all participants. more Infomation


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Who is connected to VIX?

Besides national and international Internet Service Providers and Education and Research Networks also Content Providers and Content Delivery Networks are welcome to VIX since 2008. More Details are shown in the participant list.


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What are the costs of a VIX participance?

There is a non-recurring set-up fee once per contract. The monthly port costs depend on number and speed of the ports. Participants with dual-site (VIX1 &VIX2) connections get a 30% discount if they fulfill the discount requirements. These and more details about the costs are specified in the cost overview.


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If I order an additional connection at VIX, will the setup-fee be charged again?

No, the setup-fee is charged only once per contract.


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Does the VIX support IPv6?

Sure, IPv6 at VIX has production status, ie. the connection agreement applies to IPv6 traffic as it does to IPv4 traffic. If your current VIX-Router is already IPv6-aware, please assign the IPv6 address according to a special syntax to your standard VIX-Interface to enable IPv6 peerings. The Syntax is described at our IPv6 page.


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Requirements

Which requirements shall I fulfill to participate at VIX?

The only requirement for a connection to VIX is an unique Autonomous System (AS) Number with already properly esablished global Internet connectivity. Participants are expected to use their VIX connection as a complementary tool for optimization of regional Internet traffic flows. The only routing protocol which may be used across the VIX infrastructure is BGP4.  More Information


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I do not have an own AS-Number, can I participate at VIX anyway?

Unfortunatly not. At VIX (like at any other Internet Exchange Point) an own AS-number is a technical prerequisite to peer. VIX uses the Border Gateway Protocol (BGP) as routing protocol and this requires an own Autonomous System Number (ASN).


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What is BGP?

The Border Gateway Protocol (BGP) is the standard routing protocol used by internet providers. With this protocol routes and routing information are exchanged between autonomous systems. BGP is the technical basis at VIX for bilateral peering agreements between VIX participants.


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Why do I have to configure my Router with BGP, if I want to connect at VIX?

Without BGP you cannot exchange any routing information or IP-traffic with other VIX participants.


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Is it possible to participate at VIX, without hosting my router at one of the VIX locations directly?

Yes, this is possible since May 2008. We call this method "Remote Peering". That option implies that a remote provider of your choice establishes a connection through a transparent layer 2 ethernet service to the VIX. In this case your company signs a contract with VIX and with the Carrier, therefore you are responsible for the quality of your remote connection. We reserve the right to disconnect an instable remote connection, if it compromises the stability or operation of the exchange point.


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Can I buy upstream over the VIX?

The VIX, as a neutral Internet Exchange Point, provides a complementary peering infrastructure. Commercial agreements between participants including the physical VIX infrastructure is not forbidden but it is also not supported by VIX.


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Do I have a direct 10 Gbit connection to the Internet, if I connect to VIX with 10 Gbit?

You can connect to VIX with 10 Gbit but this does not imply that you can exchange 10 Gbit per second of traffic to the Internet. The amount of Internet-traffic that really flows depends on the number and kind of your peering agreements with other VIX participants.


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Participance

What shall I do, if I want to participate at VIX?

To become a VIX participant, please read here the "General Term and Conditions", then fill in the VIX Connection Agreement. By sending the complete form you will recieve you VIX Connection Agreement by e-mail. Please send two printed and signed copies by (snail) mail to us. Find more information about the VIX participance and our postal address on the VIX Connection page.


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What happens, when I sent the Connection Agreement to the Vienna Internet eXchange?

The VIX Team will contact you within the next 5 working days. In the meantime - if you are planning a connection at Interxion (VIX2) - you can already apply for a patch at Interxion, but please set noc(at)vix.at in 'cc'. We have to authorize the endpoint 'VIX' at Interxion and assign a port for you.


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How do I order a patch at Interxion?

Please order such a patch directly at Interxion by using the standard-procedure of Interxion. Destination pint of the port is "Vienna Internet Exchange, Rack VIE1.103.R68.B2". Once you have ordered a port please contact us (also possible to set noc(at)vix.at as cc by the order) so that we can tell Interxion the destination coordinates for your port.


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Technical

How do I set up a BGP-Test-Connection in the quarantine-VLAN?

You have 3 route-servers in the Quarantine-VLAN, which siumlate the ACOnet-routers in the productive VLAN. As soon as as you have established a BGP route to those route-servers we are going to test your announcements, filter-settings, community strings and so on. Once you are moving into the productive VLAN those test-peerings will become real peerings with the Ausrian NREN ACOnet.

Configure the 3 Test-Devices as follows:

AS-Number IP-Address MD5-Password
1853 ACOnet Backbone 193.203.0.1 will be adivsed
1853 ACOnet Backbone 193.203.0.2 will be adivsed
1120 ACOnet/VIX Service 193.203.0.25 will be adivsed

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What are Site-Specific Communities?

Site-Specific Communities help to optimize traffic flows between VIX participants. More Information.


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Why is it not allowed to use the Spanning Tree Protocol?

The spanning tree protocol is made for loop prevention at layer2, but this has nothing to do with Internet Exchanges. We are using various techniques to avoid loops that would harm the IXP infrastructure. more Information


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Why is only one MAC-Address at VIX allowed?

At an Internet Exchange every participant port is intended to be connected at exactly one peering router. Normally it indicates a misconfiguration, when a VIX participant is sending packets that stem from more than one MAC-Address. We prevent more damage for other VIX participants by ignoring traffic from unregistered MAC-Addresses.


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By changing the router-hardware at my VIX-connection, what should I consider?

If your MAC-Address changes, you should inform the NOC Team noc(at)vix.at about your new Address.
Please see also: How can I contact the VIX-Network Operations Center (NOC)?


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Why does often "Invalid MD5 digest from 193.203.0.251" show up in the loglines when peering with the routeservers?

This is the result of a complex problem between routeserver software and the kernel of the routeservers. Our experience shows, that this has no impact on the BGP-Sessions. We work on that problem.


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How can I contact the VIX-Network Operations Center (NOC)?

Either per e-mail at noc(at)vix.at or during our office hours (Mo-Fr 6:00 AM - 3:00 PM UTC) under the phone number +43 1 4277 14030. Out of working hours exclusively in case of emergency you can leave a message which will inform the VIX-Operators. In sufficiently urgent cases an operator will get back to you. more Infomation


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Web Portal

What features does the web portal offer?

The userprofile shows your own personal data and other users of your company who have an account. The Network area contains statistics, peering traffic analysis, a layer 2 view and a network monitor. The Event Manager provides the possibility to register for technical workshops or meetings. more Information


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Who can apply for a portal account?

The login area is only accessible for VIX participants. Staff members of a VIX participant can apply for a personal account. Group accounts are not possible.


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How can I apply for a portal account?

Please fill in the portal account request form and send it exclusively per e-mail at webmaster(at)vix.at.


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Is there a list of IP-Addresses, MAC-Addresses and related providers at VIX?

Yes, there is an automatically reloading list (every 2 minutes) in the web portal.


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One of our peering is down. Can I get informations if this peer has problems in general?

This is also possible in our web portal, we provide you with a view on our monitoring system which is the same data as the NOC uses for analysis.

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Can I find out how much traffic I transfer to other peers?

This is shown in the web portal.


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I have forgotten my login data. What shall I do?

Please send an e-mail (from your company e-mail address) to webmaster(at)vix.at including your AS Number and in case you know it also your loginname.


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last change: August 22, 2013