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LISP Tutorial

Wed, 03/31/2010 - 10:34 by Damien Saucez • Categories:
Related software: 
Research topic related: 
Routing protocols
damien Saucez and Olivier Bonaventure
Presentation date: 
March 30, 2010

Tutorial to introduce the Locator/Identifier Separation Protocol proposal

Operational-oriented tutorials

20111202_lisp_tutorial_frnog18[pdf|zip] gives a short tutorial on LISP with deployment examples.

The slides have been presented at FRNOG 18 meeting in December 2011, podcast will be available on

Who wants an IP address in ?

Sat, 03/13/2010 - 00:50 by Olivier Bonaventure • Categories:

The IPv4 address space is becoming a scarce resource and the Internet Registries are working hard to reclaim unused IPv4 address blocks to be able to continue to allocate the requested address blocks. The is one of the candidate address blocks to be used within the coming months, but network operators are a bit frightened by the fact that there are probably many networks that already use private addresses such as or similar "simple IP addresses".

Network radix lookup

Sat, 02/27/2010 - 08:54 by Damien Saucez • Categories:

You frequently need to resolve IP addresses into their longest-match prefix? RADIX_UDP is for you ;-)

The tool loads a list of prefixes into a radix that can be queried in UDP. The syntax is simple, send a UDP segment in text with the first column being the IP, we don't care about the others ;-)

The server will reply with the same text but with the corresponding prefix prepended.


create a file "prefix.dat" with this content:

start the server:

./radix_udp prefix.dat 45005

query it

90% of all IPv4 addresses are allocated !

Wed, 01/20/2010 - 12:44 by Olivier Bonaventure • Categories:

Since the early nineties, the Internet community has been concerned by the consumption of IPv4 addresses and several techniques have been proposed and deployed to reduce the consumption of IPv4 addresses. Network Address Translation (NAT) and Classless Interdomain Routing (CIDR) have been very successful. Unfortunately, the pool of IPv4 addresses is finite and we will run out of IPv4 addresses soon.

Add-Paths Analyser

Tue, 01/19/2010 - 17:04 by Virginie Van den Schrieck • Categories:
A tool for evaluating the deployment of Add-Paths in an ISP network

This work is supported by Cisco URP grand and Trilogy project

The Add-Paths Analyser is a tool that evaluates the cost of enabling Add-Paths on the routers of an ISP. Based on a model of the network, it runs simulations to compare the behavior of the network using classical BGP versus the behavior of the same network using Add-Paths. Different Add-Paths selection modes can be explored and compared with each other.

Building a model of the network

Research topic related: 
Research project related: 
Evolution of the Internet architecture
Research project related: 
Routing protocols
Programming language: 

Implementing Software Virtual Routers on Multi-core PCs using Click

Mon, 01/11/2010 - 17:14 by Dr. Mickaël Hoerdt • Categories:
Mickael Hoerdt (Université Catholique de Louvain) et al.
Presentation date: 
November 24, 2009
Ghent, Belgium
SyClick Symposium on Click Modular Router

Multi-core CPUs, along with recent advances in memory and buses,
render commodity hardware a strong candidate for software router
virtualization. We would like to share the experience of a 3-year
research project on the design and implementation of a platform
for high-performance and flexible virtual routers on multi-core
general purpose PCs.

The Click software suite is a core component of our platform and has
been extensively used to prototype the data plane of our virtual
router platform. In particular, we exploited Click to analyse the bottlenecks of our

Faut-il réguler les quotas Internet

Sun, 01/10/2010 - 13:48 by Olivier Bonaventure • Categories:

Publié sous forme de carte blanche dans le journal Le Soir le 30 décembre 2009

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