select incorrect network interface on ubuntu 20.04.3

[jakane]

I have a lot of interfaces (mostly virtual) on my machine. I expect eno1 to be selected (that is the physical interface), however toptop selects a virtual interface (vethacf3bfc in this case).

I would really like to define an environment variable (tiptop_net) or command-line flag (--net) to force election of an interface.

$ cat /proc/net/dev

Inter-|   Receive                                                |  Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
vethacf3bfc: 316700731   24655    0    0    0     0          0         0 2113849936  343113    0    0    0     0       0          0
br-d266d89317cd:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0
veth55c75e0: 661706604  113223    0    0    0     0          0         0 117348026  587397    0    0    0     0       0          0
  eno1: 3797543484664 4400450459    0 1088    0     0          0  10788249 3567014262499 4196462622    0    0    0     0       0          0
br-7360eb7107c1:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0
br-d97c504c507d: 660121482  113223    0    0    0     0          0         0 117348026  587397    0    0    0     0       0          0
    lo: 7349578962 29952387    0    0    0     0          0         0 7349578962 29952387    0    0    0     0       0          0
docker0: 316666568   26044    0    0    0     0          0         0 2114125269  344828    0    0    0     0       0          0
veth49c7311: 952073846  304906    0    0    0     0          0         0 152216565  851237    0    0    0     0       0          0
br-867b3a9015a7: 947805162  304906    0    0    0     0          0         0 152216565  851237    0    0    0     0       0          0
br-6b911ca9bb3d:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0
br-31b870ab3794:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0

[zeki893]

On mine it selects pxe0

[nschloe]

You can now manually pick your interface with --net/-n.