ifreload [-h] (-a|-c) [-v] [-d] [-f] [-n] [-s]

reloads network interfaces(5) file /etc/network/interfaces or config file defined in ifupdown2.conf file.

Runs ifdown on interfaces that were removed from the file and subsequently runs ifup on all interfaces.

ifreload is non-disruptive. It will fix running config to match what is configured in the interfaces file without bringing the interface down. There are some cases where on linux an interface config cannot be applied unless the interface is brought down...eg: change of mac address and a few bond attributes. For such attribute changes, it may flap the interface only if the linux kernel requires it to.

When removing an interface (iface section) from the interfaces file please make sure all its references are removed as well. Similarly when renaming an interface, please make sure all references to the interface are changed to the new name. Renaming an interface in the interfaces file results in ifdown of the old and ifup of the interface with the new name.

If you do not wish to execute down on any interfaces, but only up on interfaces that were already up, please see the --currently-up option below.

# reload all auto interfaces in interfaces(5) file

ifreload -a

# reload all interfaces using service command

service networking reload

# reload all currently up interfaces without bringing any interfaces down

service networking reload-currently-up

ifup(8), ifdown(8), ifquery(8), interfaces(5), ifupdown-addons-interfaces(5)