Hi, everyone

I want to use network in my office locally.
Not connected to internet, I wish to do network in my office only.
The network cable is connected with cross-cable to another computer.

I set /etc/network/interfaces as follows :
auto lo
iface lo inet loopback
allow-hotplug eth0
iface eth0 inet static
address 192.168.0.7
netmask 255.255.255.0
network 192.168.0.0
broadcaset 192.168.0.255
gateway 192.168.0.1
dns-nameservers 192.168.0.1
dns-search kornet


Sometimes ip address is set to 192.168.0.7.
But somtimes ip address is set to 169.254.171.33
which is not set by me, and I don't konw why that address
is set to my ip address.
I want to set my ipaddress 192.168.0.7 always.

Please tell me how to fix that problem.

Thanks in advnace.
Best Regards,
J.Hwan Kim


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On Thu, 7 Jan 2010, J.H.Kim wrote:


Sometimes ip address is set to 192.168.0.7.
But somtimes ip address is set to 169.254.171.33
which is not set by me, and I don't konw why that address
is set to my ip address.
I want to set my ipaddress 192.168.0.7 always.

Please tell me how to fix that problem.


Hi. Addresses that start with 169.254 (169.254.0.0/16) are called
'link-local' addresses. They are allocated if a DHCP client fails to get
an address from a server. The idea is that even if there is no DHCP
server available hosts on a LAN can still talk to one another.


The /etc/network/interfaces you posted suggests you are using statically
assigned addresses, however the presence of a link-local address suggests
that a dhcp client is running on the box.


So I'd recommend figuring out if you have any dhcp client packages
installed (dpkg, apt-get, aptitude) and seeing if they are running (ps aux
| grep dh).


If you post further information, like the output of the ps command above,
we can help you dig further.


Cheers,

Rob

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I tried to change the world but they had a no-return policy
http://www.practicalsysadmin.com


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> I set /etc/network/interfaces as follows :
> auto lo
> iface lo inet loopback
> allow-hotplug eth0
> iface eth0 inet static
> address 192.168.0.7
> netmask 255.255.255.0
> network 192.168.0.0
> broadcaset 192.168.0.255
> gateway 192.168.0.1
> dns-nameservers 192.168.0.1
> dns-search kornet
>
>
> Sometimes ip address is set to 192.168.0.7.
> But somtimes ip address is set to 169.254.171.33
> which is not set by me, and I don't konw why that address
> is set to my ip address.
> I want to set my ipaddress 192.168.0.7 always.


Try changing
allow-hotplug eth0
to
auto eth0

That seems more reliable (subjectively).

Cheers,
Clive


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>> I set /etc/network/interfaces as follows :
>> * * *auto lo
>> * * *iface lo inet loopback
>> * * *allow-hotplug eth0
>> * * *iface eth0 inet static
>> * * * * * *address 192.168.0.7
>> * * * * * *netmask 255.255.255.0
>> * * * * * *network 192.168.0.0
>> * * * * * *broadcaset 192.168.0.255
>> * * * * * *gateway 192.168.0.1
>> * * * * * *dns-nameservers 192.168.0.1
>> * * * * * *dns-search kornet

>> Sometimes ip address is set to 192.168.0.7.
>> But somtimes ip address is set to 169.254.171.33
>> which is not set by me, and I don't konw why that address
>> is set to my ip address.
>> I want to set my ipaddress 192.168.0.7 always.

> Try changing
> allow-hotplug eth0
> to
> auto eth0

+1

>From the interfaces man page: Lines beginning with the word "auto" are
used to identify the physical interfaces to be brought up when ifup is
run with the -a option. (This option is used by the system boot
scripts.) Physical interface names should follow the word "auto" on
the same line. There can be multiple "auto" stanzas. ifup brings the
named interfaces up in the order listed. Lines beginning with "allow-"
are used to identify interfaces that should be brought up
automatically by various subsytems. This may be done using a command
such as "ifup --allow=hotplug eth0 eth1", which will only bring up
eth0 or eth1 if it is listed in an "allow-hotplug" line. Note that
"allow-auto" and "auto" are synonyms.


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On Thu,07.Jan.10, 09:47:56, J.H.Kim wrote:
> Hi, everyone
>
> I want to use network in my office locally.
> Not connected to internet, I wish to do network in my office only.
> The network cable is connected with cross-cable to another computer.
>
> I set /etc/network/interfaces as follows :
> auto lo
> iface lo inet loopback
> allow-hotplug eth0
> iface eth0 inet static
> address 192.168.0.7
> netmask 255.255.255.0
> network 192.168.0.0
> broadcaset 192.168.0.255
^^^^^
Typing error or do you actually have this in the file? Anyway, network
and broadcast are not really needed because they can be calculated from
the address+netmask.

> gateway 192.168.0.1
> dns-nameservers 192.168.0.1
> dns-search kornet
>
>
> Sometimes ip address is set to 192.168.0.7.
> But somtimes ip address is set to 169.254.171.33
> which is not set by me, and I don't konw why that address
> is set to my ip address.
> I want to set my ipaddress 192.168.0.7 always.

What Debian version are you running? There used to be a zeroconf
(or similar) package doing this. You might also try to purge
network-manager and/or avahi-daemon.

Regards,
Andrei
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