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VE can't see outside of subnet when a VM is using bridged mode

Discussion in 'Proxmox VE: Networking and Firewall' started by jemenake, Sep 13, 2017.

  1. jemenake

    jemenake New Member

    Aug 30, 2015
    Likes Received:
    i haven't had the opportunity to really test out all of the symptoms, but it seems as though my VE server has lost connectivity to outside the subnet it's on. It used to be able to (because I was able run apt-get to install updates), but now it can't. The only significant networking change I have made, since then, is i have switched a few VM's to use bridging so that they can get real IPs from our DHCP server.

    The really strange bit is that I'm able to access the bridged VM's from outside the subnet. It's just that I can't reach the actual VE host from outside the subnet (nor can it initiate a connection to outside the subnet; apt-get fails with DNS timeouts).

    I haven't the first clue what might be causing such a weird issue. Any idea where I should start looking?
  2. manu

    manu Proxmox Staff Member
    Staff Member

    Mar 3, 2015
    Likes Received:
    could it be that your switch is reacting strangely to the fact it now sees multiple MACs adresses on the same port ?

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