Static IP configuration on openSUSE

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Long-time Windows user here -- this is a beginners question, network-configuration (especially on Linux distributions) is not my area. I believe I've done my research, however. Although I might've got some of the terminology wrong.

I'm tasked with configuring a static IP network in Linux openSUSE 11.3 (32-bit, a discontinued release I believe), for which OS I'm doing this for the first time. I need to configure the network taking the following expectations into consideration:

network is part of the 192.168.146.0/24 domain,

network must support at least 21 clients,

subnet uses as little of the original network as possible.

After doing the calculations, this comes down to the following bitmask:

110nnnnn.nnnnnnnn.nnnnnnnn.ssshhhhh

Where of course n network, s is subnet, h is host. This supports 30 hosts per subnet which is adequate, and from which the following subnets span:

192.168.146.0 - 192.168.146.31

192.168.146.32 - 192.168.146.63

192.168.146.64 - 192.168.146.95

192.168.146.96 - 192.168.146.127

I need to configure the network to use the 3rd usable subnet, and for the host I'm configuring this network on, to use the lowest possible IP address from that subnet (192.168.146.97, I believe). The network interface is eth0, and this is an internal network.

I'm certain either ifconfig or the ifcfg-eth0 file is what I need, but documentation is either sketchy, meant solely as a reference for linux experts, or just not where I should look at. I'm using the built-in Terminal window, and I of course have root access.

Long-story short, how can I configure the network so that:

the host I'm doing the configuration on has the static IP of 192.168.146.97, and

the network is 192.168.146.96 - 192.168.146.127?

edited May 2 '16 at 14:48

asked May 2 '16 at 10:53

John Weisz

1186

2

ifconfig will work, but the settings will be lost after reboot. If this is just an academic exercise, that's fine, but you'd normally use yast to set things up and store the result into files, and you'd also specify a default gateway, the address of another system on the network to use as the gateway to the rest of your organization.
â€“Â Mark Plotnick
May 2 '16 at 11:48

add a commentÂ |Â

up vote
3
down vote

favorite

network is part of the 192.168.146.0/24 domain,

network must support at least 21 clients,

subnet uses as little of the original network as possible.

After doing the calculations, this comes down to the following bitmask:

110nnnnn.nnnnnnnn.nnnnnnnn.ssshhhhh

Where of course n network, s is subnet, h is host. This supports 30 hosts per subnet which is adequate, and from which the following subnets span:

192.168.146.0 - 192.168.146.31

192.168.146.32 - 192.168.146.63

192.168.146.64 - 192.168.146.95

192.168.146.96 - 192.168.146.127

Long-story short, how can I configure the network so that:

the host I'm doing the configuration on has the static IP of 192.168.146.97, and

the network is 192.168.146.96 - 192.168.146.127?

edited May 2 '16 at 14:48

asked May 2 '16 at 10:53

John Weisz

1186

2

ifconfig will work, but the settings will be lost after reboot. If this is just an academic exercise, that's fine, but you'd normally use yast to set things up and store the result into files, and you'd also specify a default gateway, the address of another system on the network to use as the gateway to the rest of your organization.
â€“Â Mark Plotnick
May 2 '16 at 11:48

add a commentÂ |Â

up vote
3
down vote

favorite

network is part of the 192.168.146.0/24 domain,

network must support at least 21 clients,

subnet uses as little of the original network as possible.

After doing the calculations, this comes down to the following bitmask:

110nnnnn.nnnnnnnn.nnnnnnnn.ssshhhhh

Where of course n network, s is subnet, h is host. This supports 30 hosts per subnet which is adequate, and from which the following subnets span:

192.168.146.0 - 192.168.146.31

192.168.146.32 - 192.168.146.63

192.168.146.64 - 192.168.146.95

192.168.146.96 - 192.168.146.127

Long-story short, how can I configure the network so that:

the host I'm doing the configuration on has the static IP of 192.168.146.97, and

the network is 192.168.146.96 - 192.168.146.127?

edited May 2 '16 at 14:48

asked May 2 '16 at 10:53

John Weisz

1186

network is part of the 192.168.146.0/24 domain,

network must support at least 21 clients,

subnet uses as little of the original network as possible.

After doing the calculations, this comes down to the following bitmask:

110nnnnn.nnnnnnnn.nnnnnnnn.ssshhhhh

Where of course n network, s is subnet, h is host. This supports 30 hosts per subnet which is adequate, and from which the following subnets span:

192.168.146.0 - 192.168.146.31

192.168.146.32 - 192.168.146.63

192.168.146.64 - 192.168.146.95

192.168.146.96 - 192.168.146.127

Long-story short, how can I configure the network so that:

the host I'm doing the configuration on has the static IP of 192.168.146.97, and

the network is 192.168.146.96 - 192.168.146.127?

networking opensuse ip

edited May 2 '16 at 14:48

asked May 2 '16 at 10:53

John Weisz

1186

edited May 2 '16 at 14:48

asked May 2 '16 at 10:53

John Weisz

1186

edited May 2 '16 at 14:48

asked May 2 '16 at 10:53

John Weisz

1186

asked May 2 '16 at 10:53

John Weisz

1186

asked May 2 '16 at 10:53

John Weisz

1186

2

ifconfig will work, but the settings will be lost after reboot. If this is just an academic exercise, that's fine, but you'd normally use yast to set things up and store the result into files, and you'd also specify a default gateway, the address of another system on the network to use as the gateway to the rest of your organization.
â€“Â Mark Plotnick
May 2 '16 at 11:48

add a commentÂ |Â

2

ifconfig will work, but the settings will be lost after reboot. If this is just an academic exercise, that's fine, but you'd normally use yast to set things up and store the result into files, and you'd also specify a default gateway, the address of another system on the network to use as the gateway to the rest of your organization.
â€“Â Mark Plotnick
May 2 '16 at 11:48

ifconfig will work, but the settings will be lost after reboot. If this is just an academic exercise, that's fine, but you'd normally use yast to set things up and store the result into files, and you'd also specify a default gateway, the address of another system on the network to use as the gateway to the rest of your organization.
â€“Â Mark Plotnick
May 2 '16 at 11:48

add a commentÂ |Â

3 Answers
3

active

oldest

votes

up vote
2
down vote

accepted

The file you need to make or edit is called ifcfg <interface>, where <interface>
could be e.g. eth0 or eth1.

On Freebsd and Debian I used :ifconfig <interface> <ip address> <netmask> and it worked please try it.

edited May 2 '16 at 13:29

schily

9,63131437

answered May 2 '16 at 11:44

BeachSamurai

7819

1

Indeed it does, thank you.
â€“Â John Weisz
May 2 '16 at 21:45

add a commentÂ |Â

up vote
0
down vote

Just as I thought, this is possible using ifconfig. On the host being configured, type:

ifconfig eth0 192.168.146.97 netmask 255.255.255.224

answered May 2 '16 at 11:35

John Weisz

1186

1

This is only going to affect the run-time configuration. You need to edit the files underneath /etc/sysconfig/network-scripts/ifcfg-* (in this case /etc/sysconfig/network-scripts/ifcfg-eth0) This file is read when the system is booted or the "network" service is restarted.
â€“Â Bratchley
May 2 '16 at 15:08

@Bratchles Yes, you are right. In the end, I resorted to using yast, which provided a surprisingly convenient GUI for configuration. I believe it is writing to this same file when changes are made.
â€“Â John Weisz
May 2 '16 at 15:25

yeah yast2 is definitely the tool to use if you're a novice. You'll want to learn how to do things the normal way but yast is an excellent example of training wheels.
â€“Â Bratchley
May 2 '16 at 15:28

add a commentÂ |Â

up vote
0
down vote

I've done all the above, but still nobody can connect, and upon investigation I find that it has reverted back to a dynamic ip assigned by the modem (according to ifconfig,) and /etc/sysconfig/network/ifcfg-eth0 still contains the static ip:

# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 192.168.1.5 netmask 255.255.255.0 broadcast 192.168.1.255

ifcfg-eth0 file:

BOOTPROTO='static'
BROADCAST=''
ETHTOOL_OPTIONS=''
IPADDR='192.168.1.200'
MTU='1500'
NAME=''
NETMASK='255.255.255.0'
NETWORK=''
REMOTE_IPADDR=''
STARTMODE='auto'
ZONE=public
USERCONTROL='no'

Yast also shows the ip as static 192.168.1.200, but ifconfig says it's dynamic. What's going on, ho can I fix this?

edited Aug 17 at 12:57

GAD3R

22.8k154895

answered Aug 17 at 12:34

Russell Behne

add a commentÂ |Â

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

up vote
2
down vote

accepted

The file you need to make or edit is called ifcfg <interface>, where <interface>
could be e.g. eth0 or eth1.

On Freebsd and Debian I used :ifconfig <interface> <ip address> <netmask> and it worked please try it.

edited May 2 '16 at 13:29

schily

9,63131437

answered May 2 '16 at 11:44

BeachSamurai

7819

1

Indeed it does, thank you.
â€“Â John Weisz
May 2 '16 at 21:45

add a commentÂ |Â

up vote
2
down vote

accepted

The file you need to make or edit is called ifcfg <interface>, where <interface>
could be e.g. eth0 or eth1.

On Freebsd and Debian I used :ifconfig <interface> <ip address> <netmask> and it worked please try it.

edited May 2 '16 at 13:29

schily

9,63131437

answered May 2 '16 at 11:44

BeachSamurai

7819

1

Indeed it does, thank you.
â€“Â John Weisz
May 2 '16 at 21:45

add a commentÂ |Â

up vote
2
down vote

accepted

The file you need to make or edit is called ifcfg <interface>, where <interface>
could be e.g. eth0 or eth1.

On Freebsd and Debian I used :ifconfig <interface> <ip address> <netmask> and it worked please try it.

edited May 2 '16 at 13:29

schily

9,63131437

answered May 2 '16 at 11:44

BeachSamurai

7819

The file you need to make or edit is called ifcfg <interface>, where <interface>
could be e.g. eth0 or eth1.

On Freebsd and Debian I used :ifconfig <interface> <ip address> <netmask> and it worked please try it.

edited May 2 '16 at 13:29

schily

9,63131437

answered May 2 '16 at 11:44

BeachSamurai

7819

edited May 2 '16 at 13:29

schily

9,63131437

edited May 2 '16 at 13:29

schily

9,63131437

edited May 2 '16 at 13:29

schily

9,63131437

answered May 2 '16 at 11:44

BeachSamurai

7819

answered May 2 '16 at 11:44

BeachSamurai

7819

answered May 2 '16 at 11:44

BeachSamurai

7819

1

Indeed it does, thank you.
â€“Â John Weisz
May 2 '16 at 21:45

add a commentÂ |Â

1

Indeed it does, thank you.
â€“Â John Weisz
May 2 '16 at 21:45

Indeed it does, thank you.
â€“Â John Weisz
May 2 '16 at 21:45

add a commentÂ |Â

up vote
0
down vote

Just as I thought, this is possible using ifconfig. On the host being configured, type:

ifconfig eth0 192.168.146.97 netmask 255.255.255.224

answered May 2 '16 at 11:35

John Weisz

1186

1

This is only going to affect the run-time configuration. You need to edit the files underneath /etc/sysconfig/network-scripts/ifcfg-* (in this case /etc/sysconfig/network-scripts/ifcfg-eth0) This file is read when the system is booted or the "network" service is restarted.
â€“Â Bratchley
May 2 '16 at 15:08

@Bratchles Yes, you are right. In the end, I resorted to using yast, which provided a surprisingly convenient GUI for configuration. I believe it is writing to this same file when changes are made.
â€“Â John Weisz
May 2 '16 at 15:25

yeah yast2 is definitely the tool to use if you're a novice. You'll want to learn how to do things the normal way but yast is an excellent example of training wheels.
â€“Â Bratchley
May 2 '16 at 15:28

add a commentÂ |Â

up vote
0
down vote

Just as I thought, this is possible using ifconfig. On the host being configured, type:

ifconfig eth0 192.168.146.97 netmask 255.255.255.224

answered May 2 '16 at 11:35

John Weisz

1186

1

This is only going to affect the run-time configuration. You need to edit the files underneath /etc/sysconfig/network-scripts/ifcfg-* (in this case /etc/sysconfig/network-scripts/ifcfg-eth0) This file is read when the system is booted or the "network" service is restarted.
â€“Â Bratchley
May 2 '16 at 15:08

@Bratchles Yes, you are right. In the end, I resorted to using yast, which provided a surprisingly convenient GUI for configuration. I believe it is writing to this same file when changes are made.
â€“Â John Weisz
May 2 '16 at 15:25

yeah yast2 is definitely the tool to use if you're a novice. You'll want to learn how to do things the normal way but yast is an excellent example of training wheels.
â€“Â Bratchley
May 2 '16 at 15:28

add a commentÂ |Â

up vote
0
down vote

Just as I thought, this is possible using ifconfig. On the host being configured, type:

ifconfig eth0 192.168.146.97 netmask 255.255.255.224

answered May 2 '16 at 11:35

John Weisz

1186

Just as I thought, this is possible using ifconfig. On the host being configured, type:

ifconfig eth0 192.168.146.97 netmask 255.255.255.224

answered May 2 '16 at 11:35

John Weisz

1186

answered May 2 '16 at 11:35

John Weisz

1186

answered May 2 '16 at 11:35

John Weisz

1186

answered May 2 '16 at 11:35

John Weisz

1186

1

This is only going to affect the run-time configuration. You need to edit the files underneath /etc/sysconfig/network-scripts/ifcfg-* (in this case /etc/sysconfig/network-scripts/ifcfg-eth0) This file is read when the system is booted or the "network" service is restarted.
â€“Â Bratchley
May 2 '16 at 15:08

@Bratchles Yes, you are right. In the end, I resorted to using yast, which provided a surprisingly convenient GUI for configuration. I believe it is writing to this same file when changes are made.
â€“Â John Weisz
May 2 '16 at 15:25

yeah yast2 is definitely the tool to use if you're a novice. You'll want to learn how to do things the normal way but yast is an excellent example of training wheels.
â€“Â Bratchley
May 2 '16 at 15:28

add a commentÂ |Â

1

This is only going to affect the run-time configuration. You need to edit the files underneath /etc/sysconfig/network-scripts/ifcfg-* (in this case /etc/sysconfig/network-scripts/ifcfg-eth0) This file is read when the system is booted or the "network" service is restarted.
â€“Â Bratchley
May 2 '16 at 15:08

@Bratchles Yes, you are right. In the end, I resorted to using yast, which provided a surprisingly convenient GUI for configuration. I believe it is writing to this same file when changes are made.
â€“Â John Weisz
May 2 '16 at 15:25

yeah yast2 is definitely the tool to use if you're a novice. You'll want to learn how to do things the normal way but yast is an excellent example of training wheels.
â€“Â Bratchley
May 2 '16 at 15:28

This is only going to affect the run-time configuration. You need to edit the files underneath /etc/sysconfig/network-scripts/ifcfg-* (in this case /etc/sysconfig/network-scripts/ifcfg-eth0) This file is read when the system is booted or the "network" service is restarted.
â€“Â Bratchley
May 2 '16 at 15:08

@Bratchles Yes, you are right. In the end, I resorted to using yast, which provided a surprisingly convenient GUI for configuration. I believe it is writing to this same file when changes are made.
â€“Â John Weisz
May 2 '16 at 15:25

yeah yast2 is definitely the tool to use if you're a novice. You'll want to learn how to do things the normal way but yast is an excellent example of training wheels.
â€“Â Bratchley
May 2 '16 at 15:28

add a commentÂ |Â

up vote
0
down vote

# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 192.168.1.5 netmask 255.255.255.0 broadcast 192.168.1.255

ifcfg-eth0 file:

BOOTPROTO='static'
BROADCAST=''
ETHTOOL_OPTIONS=''
IPADDR='192.168.1.200'
MTU='1500'
NAME=''
NETMASK='255.255.255.0'
NETWORK=''
REMOTE_IPADDR=''
STARTMODE='auto'
ZONE=public
USERCONTROL='no'

Yast also shows the ip as static 192.168.1.200, but ifconfig says it's dynamic. What's going on, ho can I fix this?

edited Aug 17 at 12:57

GAD3R

22.8k154895

answered Aug 17 at 12:34

Russell Behne

add a commentÂ |Â

up vote
0
down vote

# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 192.168.1.5 netmask 255.255.255.0 broadcast 192.168.1.255

ifcfg-eth0 file:

BOOTPROTO='static'
BROADCAST=''
ETHTOOL_OPTIONS=''
IPADDR='192.168.1.200'
MTU='1500'
NAME=''
NETMASK='255.255.255.0'
NETWORK=''
REMOTE_IPADDR=''
STARTMODE='auto'
ZONE=public
USERCONTROL='no'

Yast also shows the ip as static 192.168.1.200, but ifconfig says it's dynamic. What's going on, ho can I fix this?

edited Aug 17 at 12:57

GAD3R

22.8k154895

answered Aug 17 at 12:34

Russell Behne

add a commentÂ |Â

up vote
0
down vote

# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 192.168.1.5 netmask 255.255.255.0 broadcast 192.168.1.255

ifcfg-eth0 file:

BOOTPROTO='static'
BROADCAST=''
ETHTOOL_OPTIONS=''
IPADDR='192.168.1.200'
MTU='1500'
NAME=''
NETMASK='255.255.255.0'
NETWORK=''
REMOTE_IPADDR=''
STARTMODE='auto'
ZONE=public
USERCONTROL='no'

Yast also shows the ip as static 192.168.1.200, but ifconfig says it's dynamic. What's going on, ho can I fix this?

edited Aug 17 at 12:57

GAD3R

22.8k154895

answered Aug 17 at 12:34

Russell Behne

# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 192.168.1.5 netmask 255.255.255.0 broadcast 192.168.1.255

ifcfg-eth0 file:

BOOTPROTO='static'
BROADCAST=''
ETHTOOL_OPTIONS=''
IPADDR='192.168.1.200'
MTU='1500'
NAME=''
NETMASK='255.255.255.0'
NETWORK=''
REMOTE_IPADDR=''
STARTMODE='auto'
ZONE=public
USERCONTROL='no'

Yast also shows the ip as static 192.168.1.200, but ifconfig says it's dynamic. What's going on, ho can I fix this?

edited Aug 17 at 12:57

GAD3R

22.8k154895

answered Aug 17 at 12:34

Russell Behne

edited Aug 17 at 12:57

GAD3R

22.8k154895

edited Aug 17 at 12:57

GAD3R

22.8k154895

edited Aug 17 at 12:57

GAD3R

22.8k154895

answered Aug 17 at 12:34

Russell Behne

answered Aug 17 at 12:34

Russell Behne

answered Aug 17 at 12:34

Russell Behne

add a commentÂ |Â

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