Re: /etc/init.d/networking restart does not change IP address. I have to reboot. Help.
On 2009-04-04 13:28 +0200, Foss User wrote:
> Trying to change the IP address in /etc/network/interfaces and then
> /etc/init.d/networking restart does not really change my IP. I am
> having to do a reboot to really change the IP. Could someone please
> help me in understanding why restarting networking doesn't do it?
>
> OUTPUT BEFORE CHANGING IP ADDRESS:
>
> lenny-template:~# ifconfig
> eth0 Link encap:Ethernet HWaddr 00:0c:29:e9:63:c4
> inet addr:10.31.253.153 Bcast:10.31.253.255 Mask:255.255.255.0
> inet6 addr: fe80::20c:29ff:fee9:63c4/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:255 errors:0 dropped:0 overruns:0 frame:0
> TX packets:48 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:22731 (22.1 KiB) TX bytes:6835 (6.6 KiB)
> Interrupt:18 Base address:0x2080
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:8 errors:0 dropped:0 overruns:0 frame:0
> TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:560 (560.0 B) TX bytes:560 (560.0 B)
>
> lenny-template:~# cat /etc/network/interfaces
> # The loopback network interface
> auto lo
> iface lo inet loopback
>
> # The primary network interface
> allow-hotplug eth0
^^^^^^^^^^^^^
This is your problem, you probably want to change that to "auto".
> iface eth0 inet static
> address 10.31.253.153
> netmask 255.255.255.0
> network 10.31.253.0
> broadcast 10.31.253.255
> gateway 10.31.253.1
> # dns-* options are implemented by the resolvconf package, if installed
> dns-nameservers 10.100.8.203
>
> Then I edit only the 'address' line of 'iface eth0 inet static' to:
>
> address 10.31.253.154
>
> and issue the command: /etc/init.d/networking restart.
>
> After that when I run ipconfig command, I see only iface lo in the
> output. If I run ipconfig -a command, then I see iface eth0 too but
> its ip address is still the old one: 10.31.253.153
The reason is that "/etc/init.d/networking restart" boils down to
"ifdown -a --exclude=lo; ifup -a --exclude=lo" and "ifup -a" only brings
up interfaces that are marked "auto" in /etc/network/interfaces.
Running "ifup eth0" will bring the interface up again and change your IP
address.
Sven
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