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Old 10-18-2009, 11:23 AM   #1
joel_eire
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Loopback adapter changes lost


Hi,

I'm running Red Hat Enterprise 5.1

I need to add the following to my network config:

ip address add 192.168.99.37/24 dev lo

This works fine but my issue is that if "service network restart" is run this config is lost and I have to manually re-run it.
I have added it in rc.local which covers me for reboots.

so, What the best way to make this command run in the network restart?

Thanks guys

Joel
 
Old 10-18-2009, 04:05 PM   #2
r3sistance
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You should leave lo at 127.0.0.1, it can cause issues to change it like that.

Anyways there is a configuration file what is /etc/sysconfig/network-scripts/ifcfg-lo where you can change the default ip.

However I would suggest the following, copy the ifcfg-lo file to the file name ifcfg-lo:0 (within the /etc/sysconfig/network-scripts/ folder).

edit the ifcfg-lo:0 file to the following

Code:
DEVICE=lo:0
IPADDR=192.168.88.37
NETMASK=255.255.255.0
NETWORK=192.168.88.0
BROADCAST=192.168.88.255
ONBOOT=yes
NAME=loopback
This should set your machine up in a much better configuration.

Last edited by r3sistance; 10-18-2009 at 04:11 PM. Reason: Fixed network and broadcast IPs
 
Old 10-20-2009, 10:19 AM   #3
joel_eire
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Question loopback adapter changes lost

Quote:
Originally Posted by r3sistance View Post
You should leave lo at 127.0.0.1, it can cause issues to change it like that.
Hi r3sistance,

Thanks for the reply.
I need to create an additional ip on the loopback.
Do you know if that's possible from ifcfg-lo?

Thanks

Joel
 
Old 10-20-2009, 05:48 PM   #4
r3sistance
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As I said previously .

Quote:
Originally Posted by r3sistance View Post
However I would suggest the following, copy the ifcfg-lo file to the file name ifcfg-lo:0 (within the /etc/sysconfig/network-scripts/ folder).

edit the ifcfg-lo:0 file to the following

Code:
DEVICE=lo:0
IPADDR=192.168.88.37
NETMASK=255.255.255.0
NETWORK=192.168.88.0
BROADCAST=192.168.88.255
ONBOOT=yes
NAME=loopback
This should set your machine up in a much better configuration.
This will give you a new network device what is called lo:0 that will hold the additional IP.
 
Old 10-30-2009, 10:58 AM   #5
joel_eire
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Quote:
Originally Posted by r3sistance View Post
As I said previously .



This will give you a new network device what is called lo:0 that will hold the additional IP.
thanks for the advice, but that seemed to cause network connection issues on eth0.

Joel
 
Old 10-30-2009, 02:41 PM   #6
r3sistance
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Are you certain what you have is a direct copy of what I placed above...

if it is then might be worth checking what IP range eth0 is using.
 
  


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