• VMs have no network access after 6.12 upgrade

    johnsanc

    By johnsanc

      • Minor

    I was running 6.11.5 and upgraded to 6.12. The upgrade went smoothly but none of my VMs could access the internet. I could view the VMs with VNC and access my dockers that have a web GUI from within those VMs, but the VMs themselves cannot connect to the internet or default gateway. My VMs use br0.

     

    I tried downgrading to 6.11.5 and the issue was resolved. I've attached diagnostics from 6.12 before downgrading.

    tower-diagnostics-20230617-1431.zip

     

    The only thing that stood out to me was this in libvirt log: 

    2023-06-17 18:30:05.122+0000: 20194: error : virNetSocketReadWire:1791 : End of file while reading data: Input/output error

     

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    johnsanc

    Yes that works but then I cannot access via RDP from my laptop, so changing to virbr0 is not a good solution. Is there a suggested way to do this?

     

    I don't understand why this issue only occurs with 6.12 and downgrading reverts the behavior to work correctly for my current configuration.

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    johnsanc

    I setup br1 with the same route as I had for br0. Using br1 then seemed to work... I'm definitely not an expert with the networking settings but if anyone knows why this issue occurred in the first place I'd love to know.

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    Celsian

    I fixed this issue by switching the VM Network Model from virtio-net to virtio. I have no idea why that fixed it.

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    Jezper

    I'm having the same problem. Any news on this?

     

    None of my VM:s network work anymore with 6.12. Using virtio adapters and neither virtio nor virtio-net works.

     

    Using the bridge adapter br.<vlan-number>

     

    Doing a package scan from the router only results in a lot of ARP packages being transferred back and forth. It is asking for the mac address of the default gateway for the specific VLAN. But the packages are being sent over and over again.

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  • Status Definitions

     

    Open = Under consideration.

     

    Solved = The issue has been resolved.

     

    Solved version = The issue has been resolved in the indicated release version.

     

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