Re: /etc/init.d/networking restart does not change IP address. I have to reboot. Help.
On Sat, Apr 4, 2009 at 5:21 PM, Sven Joachim <svenjoac@gmx.de> wrote:
> 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
>
So, should I add the following line:
auto eth0
before this line:
allow-hotplug eth0
?
What is the use of allow-hotplug eth0? Can I remove the allow-hotplug line?
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