Tailflow – An Openflow Controller Framework


By Erlang Central | Published: March 18, 2013



Tail-f’s Network Control System (NCS) supports programming of network services on both traditional networks and Openflow networks. Tailflow is the part of NCS that supports Openflow.
Inspired by the 20 year old ideas around micro-protocols,
Tailflow introduces a concept called the ‘flowlet’.
Each flowlet encapsulates  some minimum amount of logic in order to make it composable and easy to understand. 
By stacking flowlets on top of each other, the full functionality of
an Openflow device is constructed, may it be an ordinary learning
switch or a more complex NAT/FW device or, in principle, any other kind of networking device.
This talk will describe the architecture of Tailflow and show how we, by using OpenVSwitch, created a simulated Data Center with many server racks, each server running many VMs. A Layer-2 virtual network is implemented as well as a NAT/FW for public access, all controlled by a Tailflow application.

Talk objectives: Describe an approach for constructing Openflow control software.

Target audience: 
– Network engineers. 
– People interested in Openflow and/or protocol design.
– People interested in Software Defined Networks (SDN).
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Speakers:

  • Torbjörn Törnkvist

    Solutions Architect @ Tail-f
    Tail-f

    Enthusiastic Erlang user since 1991. Former member of Ericsson CSLab, now working at Tail-f Systems. Long time contributor to the Erlang Open Source Community. Creator of trapexit.org. Has implemented many protocols in Erlang over the years (e.g LDAP, Radius, SMB, DHCP, X11, OpenID).

    Torbjörn Törnkvist


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