dual ring topology questions

Discussion in 'Proxmox VE: Networking and Firewall' started by RobFantini, Oct 13, 2018.

  1. RobFantini

    RobFantini Active Member
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    Hello

    I am trying to get a full understanding dual ring networks before using for corosync .

    Question 1: how many hardware network interface ports are needed per node for a dual ring set up?


    Best Regards,
    Rob Fantini
     
  2. RobFantini

    RobFantini Active Member
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    Here is a drawing.




    Dual-ring-Topology.jpg
     
  3. wolfgang

    wolfgang Proxmox Staff Member
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    Hi RobFantini
    You need two ports per node for corosync with two rings.
    One port for ring0 and the other for ring1.
     
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  4. RobFantini

    RobFantini Active Member
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    for the 1ST ring: is seems like the last node connected would not be able to connect to the first node with out more then two ports?
     
  5. wolfgang

    wolfgang Proxmox Staff Member
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    I think you get misguided about the name "ring".
    This has not to be a real ring network topology.
    Normally you use common star network topology with a switch per ring.
    If you want to make a real ring network topology you need 2 NICs per ring that means total 4 per node.
    And you must set up your routing what is not so easy so I would use a star network topology.
     
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  6. RobFantini

    RobFantini Active Member
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    OK I understand.

    For now we'll use two corosync star networks. Each connected to a reliable switch.
     
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