How To Check Your Gateway IP

carlosinfl · 10-11-2007, 10:22 AM

I am running 7.04 Ubuntu and I have recently setup my IP staticly in /etc/network/interfaces as shown below however I was not sure how I release & renew for the settings to take place. I really just need to know if my PC is not using the newly set static default gateway. Can someone please tell me how I can tell what my DG is set to? The "ifconfig eth0" command does not specify the DG.

Code:

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

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
        address 10.1.1.204
        netmask 255.255.0.0
        network 10.1.1.0
        broadcast 10.1.1.255
        gateway 10.1.1.231

anomie · 10-11-2007, 10:29 AM

Quote:

Originally Posted by Carlwill

Can someone please tell me how I can tell what my DG is set to?

netstat -rn

carlosinfl · 10-11-2007, 11:08 AM

Quote:

Originally Posted by anomie

netstat -rn

I am confused as to why my static IP settings are not being utilized.

Code:

cwilliams@cwilliams:~$ netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
10.1.0.0        0.0.0.0         255.255.0.0     U         0 0          0 eth0
0.0.0.0         10.1.1.1        0.0.0.0         UG        0 0          0 eth0

MadTrapper · 10-11-2007, 11:14 AM

Edit:-

/etc/resolv.conf using vi so #vi /etc/resolv.conf

you should also edit /etc/hosts if you are changing the network third octet

carlosinfl · 10-11-2007, 11:17 AM

Quote:

Originally Posted by MadTrapper

Edit:-

/etc/resolv.conf using vi so #vi /etc/resolv.conf

you should also edit /etc/hosts if you are changing the network third octet

Why would I want to edit my resolve.conf? That info is correct and should not change. I do however only want to make sure I am using the newly specified DG in my interfaces config file.

It simply appears that I made a change from dynamic to static and now I just can't seem to figure out how to apply those changes (I assume rebooting obviously would do the trick but I want to avoid that).

resolve.conf is simply pointing to the correct name (DNS) servers I want to continue using.
/etc/hosts is simply stating my DNS hostname on the LAN which as well should not be changing.

My dynamic settings were as follows:

ip = 10.1.1.204
sm = 255.255.0.0
dg = 10.1.1.1

I now simply added it as static the same as dynamic with a new DG for testing.

carlosinfl · 10-11-2007, 01:31 PM

Anyone? I really need to know why my static set DG is not taking effect into my LAN.

anomie · 10-11-2007, 08:45 PM

I don't know debian/ubuntu, but since I answered earlier (and no one else is chiming in), I have to ask: have you restarted your network service? If not, do so. If you can't tolerate a minor network interruption, then make the changes in real-time using route.

linux4begin · 10-17-2007, 07:31 AM

Dear

route -n

with this command you can easily find out the g.w/
This command works on redhat and suse platform also.

try it.