Network for Innovation and Research (NeIF)

Use-Cases

  1. Point-to-Point: in the standard use-case NeIF-links are used to build a layer-1 point-to-point connection between two participants. The Belwü muxponders, residing at each university in Baden-Württemberg are used as entry and exit points. Such direct links can be used to connect institutes of a university to perform specific experiments or to connect the university's datacenter to optimize user experience by increasing bandwidth for certain services.
  2. Latency-Loop: since researchers asked about methods for creating high latency in an experimental environment the network operating group presented a concept of multiple, serial connected NeIF-links. In December 2015 three links between the participating universities were connected to each other to get a ring-like layer-1 connection. Sending packets from Ulm via Karlsruhe to Tübingen and onwards to Ulm (total distance of 534 km according to1)) we achieved a round-trip-time (RTT) of about 6 milliseconds. With the current setup we can have up to four of these loops in parallel. When connecting them serially it's possible to create a layer-1 connection of about 2136 kilometers distance resulting in a 24 ms RTT. We plan to maximize that construct in the futures by spanning the loop all across Baden-Württemberg including the universities in Heidelberg, Freibug and Konstanz. That would result in a distance of about 1400 kilometers per loop, achieving a total distance of over 7000 kilometers when connecting the maximum of five loops in serial.

The following table shows the current configuration of NeIF-Links:

Port#01 Port#02 Port#03 Port#04 Port#05 Port#06 Port#07 Port#08 Port#09 Port#10
Karlsruhe TU#03 UL#02 TU#02 UL#04 UL#09 UL#10 TU#09 TU#10
Tübingen UL#01 KA#04 KA#01 UL#05 Campus UL#08 UL#07 KA#08 KA#09
Ulm TU#01 KA#02 KA#05 TU#05 TU#08 TU#07 KA#06 KA#07

The following graphic also depicts the configuration:

en/neif.txt · Last modified: 2016/11/15 13:27 by Andre Hafner