How to reset network interfaces in Ubuntu?

Question

ubuntu

Hello.
I register routes, and without reboot they are not installed.
Is there any way to reset all network interfaces at once?
Tried: /etc/init.d/networking restart , service networking restart , but it doesn't help. Have to restart the server. :(
I prescribe the routes in this way:
nano /etc/network/interfaces
Under the interface I add up route add xxxx netmask xxxx gw xxxx

Answer 1

Lower-raise all network interfaces:
in /etc/network/interfaces instead of

up route add xxxx netmask xxxx gw xxxx

insert:

auto eth0
iface eth0 inet static
        address 192.168.0.2/24
        gateway 192.168.0.1
        dns-nameservers 192.168.0.1
        post-up route add x.x.x.x netmask x.x.x.x gw 192.168.0.1
        post-down route del x.x.x.x netmask x.x.x.x gw 192.168.0.1

but better:

auto eth0
iface eth0 inet static
        address 192.168.0.2/24
        gateway 192.168.0.1
        dns-nameservers 192.168.0.1
        post-up ip route add x.x.x.x/xx via 192.168.0.1
        post-down ip route del x.x.x.x/xx via 192.168.0.1

Answer 2

ifdown eth0 && ifup eth0

Answer 3

Try this:
service networking stop
service networking start