Re: [v6ops] Eating our own dog food : students solving IPv6 entreprise multihoming

Jeff Tantsura <> Thu, 20 July 2017 07:15 UTC

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Date: Thu, 20 Jul 2017 09:12:18 +0200
From: Jeff Tantsura <>
To: Olivier Bonaventure <>, RTGWG <>, V6 Ops List <>
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Thread-Topic: Eating our own dog food : students solving IPv6 entreprise multihoming
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Subject: Re: [v6ops] Eating our own dog food : students solving IPv6 entreprise multihoming
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Thank you for sharing with RTGWG and looking forward to your future contributions!

-----Original Message-----
From: rtgwg <> on behalf of Olivier Bonaventure <>
Date: Thursday, July 20, 2017 at 08:54
To: RTGWG <>, V6 Ops List <>
Subject: Eating our own dog food : students solving IPv6 entreprise multihoming

    During v6ops and yesterday's plenary, John Brzozowski encouraged us to 
    use our own technologies for the IETF network with NAT64. This argument 
    is valid for those who teach computer networks and since RTGWG is 
    working on enterprise IPv6 multihoming, you might be interested in a 
    recent experiment we did with our students.
    When students learn networking, they should not learn the current state 
    of affairs but be prepared for the future since they'll only graduate in 
    a few years. Several years ago, when IPv6 deployment was burgeoning, I 
    decided to remove IPv4 from my networking 101 open-source textbook
    ( ). Since then, our students only learn 
    IPv6 and results are excellent. Once they've learned IPv6, they can 
    quickly understand how IPv4 works. Hopefully they'll see sunset4 during 
    their career.
    After networking 101, some of your students attend an advanced 
    networking course. This course combines theory with practice and usually 
    students do practice after theory to illustrate the theoratical 
    concepts. This year, we decided to flip the course and start from a 
    practical problem to see how groups of students can address this problem 
    with an open mindset and based only on what they've learned from 
    networking 101 and the information that they will find on the Internet. 
    During their carreer, they will be forced to learn on the spot anyway 
    and they should better start early to look at rfcs, internet drafts and 
    open-source implementations.
    The project given to the students was very simple. One of the engineers 
    responsible for our (IPv4 mainly :-() campus network explained the 
    architecture and the basic openrational principles that they use. 
    Olivier Tilmans prepared a virtual machine that mimics our compus 
    network (basically six routers) and we attached a few virtual machines 
    to act as servers and clients. The only constraint that we was that the 
    campus network had two upstream providers each delegating a different 
    prefix to the campus network.
    Then, the students had to  :
    - define an IPv6 addressing plan for their network
    - select, install and configure a routing protocol and make sure that it 
      was working correctly
    - install and configure dhcp servers/ra to distribute addresses
    - install and configure DNS servers and resolvers
    - install and configure Diffserv-like traffic control
    - install and configure ssh and http servers
    - install and configure firewall services to protect the network
    - think about a solution to monitor the network
    [the number of tasks was chosen based on the number of students in each 
    All student teams had an operation network at the end of the project. 
    Since we believe in automation and open-source, we required them to 
    automate their network from day one and several groups have released 
    their entire project in open-source.
     From a teaching viewpoint, entreprise IPv6 multihoming is a very nice 
    problem. To encourage other educators (and maybe also network engineers 
    willing to continue to learn) to experiment with IPv6 entreprise 
    multihoming, we have released all the software developed to create this 
    project in open-source.
    You can find all the details at :
    You only need a Linux virtual machine provided by Vagrant to reproduce 
    the experiment. The barrier to experiment with IPv6 entreprise 
    multihoming is very low.
    Selected students projects with reports and code are available from this 
    repository as well
    I encourage you to have a look at the students' reports to see their 
    final results:
    Comments and feedback are welcome although the IETF mailing lists may 
    not be the best place for discussions on software or teaching projects...
    Olivier Tilmans and Olivier Bonaventure
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