static routes and ifconfig

yiux · 06-11-2007, 10:06 AM

am using debian 4.0 and when i use ifconfig to configure a network interface (static ip address). By doing this a static route is added automatically.

for example if--> # ifconfig eth0 192.168.1.2 netmask 255.255.255.0

then ---> # route -n
gives:
[HTML]Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.100.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0[/HTML]

i don't want this static route to be added automatically!!
Is there a way of doing this?!![HTML][/HTML]

acid_kewpie · 06-11-2007, 11:17 AM

that's your local interface, you can't not add it...

yiux · 06-11-2007, 12:12 PM

In fact am using my linux box as a router and each time an interface is configured, it add a route automatically. I don't want to use this route, i want to use my own static route!!

Is there a way of preventing 'ifconfig' command from adding a route automatically!!

acid_kewpie · 06-11-2007, 12:32 PM

as i said, there is no route, it's just a known interface with a subnet associated with it. rather than saying you want to do it your way, explain what problems this creates... if you, for some bizarre reason want a remote route to be preferred over a local connection you can always just use a higher metric for the local interface.

Shadow_7 · 06-11-2007, 06:24 PM

If you don't want that route -n result, use a netmask of 255.255.255.255. Not that that is functional since you'll never be able to broadcast to any other interface it's connected to. If you truly had a route, your route -n would looks like this:

Code:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.2.0     0.0.0.0         255.255.255.0   U     0      0        0 wlan0
0.0.0.0         192.168.2.1     0.0.0.0         UG    0      0        0 wlan0

The one with Gateway address is the actual route.