Setting static route debian

blackRonin · 10-29-2015, 05:53 PM

Hello

I have Debian 8 and i want to set static route for two interfaces.
So i add route line to /etc/network/interfaces:

Code:

auto eth0
iface eth0 inet static
address 172.168.2.1
netmask 255.255.255.0
gateway 172.168.2.2
up route add -net 172.168.3.0 netmask 255.255.255.0 gw 172.168.1.3

But after restart networking
the route doesn't display in route command.

I tried few combinations:
with post-up
without up (only route)
up /sbin/ip r add 172.168.3.0/24 via 172.168.1.3

but nothing works

when i type in command line
route add -net 172.168.3.0 netmask 255.255.255.0 gw 172.168.1.3
it works, but i need permanent solution

Please help me

hortageno · 10-29-2015, 06:16 PM

Try

Code:

postup route add -net 172.168.3.0/24 gw 172.168.1.3

blackRonin · 10-30-2015, 07:13 AM

After reboot route shows:

Quote:

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 172.168.2.2 0.0.0.0 UG 0 0 0 eth0
link-local * 255.255.0.0 U 1000 0 0 eth0
172.168.1.0 * 255.255.255.0 U 0 0 0 eth1
172.168.2.0 * 255.255.255.0 U 0 0 0 eth0

bolded line is new.

And here is my /etc/network/interfaces file:

Quote:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
allow-hotplug eth0
iface eth0 inet static
address 172.168.2.1
netmask 255.255.255.0
gateway 172.168.2.2
#static route
postup route add -net 172.168.3.0/24 gw 172.168.1.3

auto eth1
allow-hotplug eth1
iface eth1 inet static
address 172.168.1.1
netmask 255.255.255.0
gateway 172.168.1.3

Emerson · 10-30-2015, 08:16 AM

May I ask why you are using public addresses for private networking? It is a violation, unless you have permission from AOL who owns these addresses.

blackRonin · 10-30-2015, 07:47 PM

It's just school project, and whose ip addresses where in excersise.

Can you help me ?

berndbausch · 10-30-2015, 11:56 PM

You could try the following:

Code:

ifdown -v eth0; ifup -v eth0

to get some information as to what's happening behind the scenes.

A few additional thoughts:
According to my manpage, it should be post-up with a dash in the middle, not postup.
I also wonder what's the sequence of events here - if eth1 is not up at the time the route command is executed, wouldn't route fail?
Finally, in this day and age you should use the iproute2 commands (ip route ....) instead of the old ones (ifconfig, route and company).