why is ifup ens19.2023 iteration over all subinterfaces like ens19.2023.4 aswell ?

Asked by Immo on 2021-01-07

I expect that a single ifup call with just one vlan interface will NOT bring up all sub vlan interfaces too
but on my ubuntu 18.04.02 I do see this

root@dsr-router-1:~# ifup ens19.2023
ens19.2023
Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
ens19.2023.4
Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
Added VLAN with VID == 4 to IF -:ens19.2023:-
ens19.2023.4090
Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
Added VLAN with VID == 4090 to IF -:ens19.2023:-
root@dsr-router-1:~#

more is written at> https://askubuntu.com/questions/1305801

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