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Thread: br0 suddenly appeared after a reinstall of 15.3

  1. #1

    Default br0 suddenly appeared after a reinstall of 15.3

    So I wound up reinstalling 15.3 a couple of times to try out using a pair of spinning disks on my laptop instead of the SSD's. That didn't work (very slow) so I reverted back to a pair of SSD's, but now I notice that br0 appeared. I'm guessing some driver has been "updated" to include some functionality that it didn't have before. I tried clicking around in the Network Manager applet, but can't find any reference to br0 (the connections appear blank and "wired connection 1 reports "never used"). Is there a way to remove br0 from the system? I tried Wicked and deleted the configuration for br0, but it came back when I reinvoked Network Manager.

  2. #2
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    Default Re: br0 suddenly appeared after a reinstall of 15.3

    Here, "br0" was setup when I installed "virt-manager". If you are doing any sort of virtualization, then "br0" is probably setup to allow a bridge network to your virtual machines.
    openSUSE Leap 15.4 Beta; KDE Plasma 5.24.4;
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  3. #3

    Default Re: br0 suddenly appeared after a reinstall of 15.3

    Quote Originally Posted by nrickert View Post
    Here, "br0" was setup when I installed "virt-manager". If you are doing any sort of virtualization, then "br0" is probably setup to allow a bridge network to your virtual machines.
    Thanks NR! I always install VirtualBox and never saw br0 before... (VBox seems to run normally.)
    Hmmm... Maybe I clicked on install some pattern during the initial installation that I don't normally install.
    I checked YaST patterns and didn't see any server patterns installed.
    I did install YaST "server utilities" pattern, also Minimal Appliance Base. (under Base Tech.)

    Could I search YaST for "br0?" (probably something else...)

    Maybe VBox was recently changed to invoke a system IP bridge in a way that it didn't used to?

    (More or less thinking out loud...)

    I watch these things in gkrellm - sort of rely on it - that's where I spotted the bridge.

    I guess it's not a big deal - I can just ignore it more or less, right?

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    Default Re: br0 suddenly appeared after a reinstall of 15.3

    Quote Originally Posted by pattiM View Post
    I guess it's not a big deal - I can just ignore it more or less, right?
    I suspect that is right.
    openSUSE Leap 15.4 Beta; KDE Plasma 5.24.4;
    testing Tumbleweed.

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    Default Re: br0 suddenly appeared after a reinstall of 15.3

    Quote Originally Posted by pattiM View Post
    Could I search YaST for "br0?" (probably something else...)
    The Kernel's Bridge capability is documented here – <https://wiki.linuxfoundation.org/networking/bridge>.

    It seems to have been introduced around 2001 – you'll need to install the “bridge-utils” package to really inspect what's going on – despite a command “bridge” being available by default from the “iproute2” package …

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