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Linux, network config and deleting old eth's

Posted on 2013-12-12
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Last Modified: 2013-12-12
I have a situation where I created a new IP using the
'setup' command.  I created eth3, then I deleted the old eth2 by deleting all the characters in the  setup-Netowrk configuration-eth2   TUI

This did not work well, and I ca no longer perofrm a service network restart

I usually setup a network config using the setup command.  In this situation where I need to delete eth2, how should I do it

Thanks
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Question by:Los Angeles1
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Accepted Solution

by:
farzanj earned 500 total points
ID: 39714943
It depends on your distribution.

For RedHat family, you can simply move the interface files to a backup folder or change the file name

Eg.

mv /etc/sysconfig/network-scripts/ifcfg-eth2  /etc/sysconfig/network-scripts/BKUP-ifcfg-eth2

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This way it is really easy to revert back to your older settings but just changing the file name back.

To incorporate these changes, issue command


service network restart
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Author Comment

by:Los Angeles1
ID: 39715292
Here are the ifcfg files

 ls -la ifcfg*
-rw-r--r--. 3 root root 235 Dec 12 11:27 ifcfg-eth2
-rw-r--r--. 3 root root 260 Dec 12 11:27 ifcfg-eth3
-rw-r--r--. 1 root root 254 Oct 10 10:48 ifcfg-lo

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Here is the content of the ifcfg-eth2 file:

cat ifcfg-eth2
# Please read /usr/share/doc/initscripts-*/sysconfig.txt
# for the documentation of these parameters.
DEVICE=eth2
BOOTPROTO=none
NETMASK=255.255.240.0
TYPE=Ethernet
IPADDR=10.14.0.194
GATEWAY=10.14.0.1
IPV6INIT=no
ONBOOT=no
USERCTL=no

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So I did a mv on the ifcfg-eth2 to a.a, and then I did a mv back to ifcfg-eth2, so the directory is still the same

 ls -la ifcfg*
-rw-r--r--. 3 root root 235 Dec 12 11:27 ifcfg-eth2
-rw-r--r--. 3 root root 260 Dec 12 11:27 ifcfg-eth3
-rw-r--r--. 1 root root 254 Oct 10 10:48 ifcfg-lo

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The ifup eth3 still works, but I get this on the service network restart

service network restart
shutting down loopback interface                {OK]
Bringing up loopback interface          {OK]

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So at this point the service network restart does nto bring up eth3 even though the ifcfg-eth3 file is in the directory
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Author Comment

by:Los Angeles1
ID: 39715299
Sorry, that previous post was ment for another thread
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Author Closing Comment

by:Los Angeles1
ID: 39715301
This worked well
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