[SOLVED] What exactly does "apply network configuration"?

[mailinglists]

Hi,

since we have installed ifupdown2 we can apply network configuration without restarting the host.
What would the manual equivalent of this apply button be in shell?
I tried ifdown vmbr0 && ifup vmbr0 and all VMs instances network cards were removed from the bridge and lost connectivity.

 

[dcsapak]

basically it renames the '/etc/network/interfaces.new' file to '/etc/network/interfaces' and calls 'ifreload -a'
(it also does some sdn stuff, but thats more complicated)