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Old 11-26-2012, 06:34 AM   #1
x201s
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Can connect to internet only after I run "service network restart"


I have a RHEL 6 server, on top of a VMware Hypervisor. (I have no access to the Hypervisor).

When freshly rebooted, I don't have outside connection-- ping www.yahoo.com, etc gives me "unknown host".

chkconfig --list shows network service "on" for 2345.

But when I restart network service, it connects fine.

What I am missing?

Please help.

TIA,
 
Old 11-26-2012, 07:05 AM   #2
druuna
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Check your ifcfg-eth0 file for the following entry: ONBOOT=yes, it might be set to no
 
Old 11-26-2012, 10:42 AM   #3
x201s
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No, onboot was "yes".

Someone said it is network manager that is playing tricks.

I had the following in ifcfg-eth0:
I had NM_CONTROLLED = no, but that didn't help.

I had bootproto=none, changed to static (yes, I have a static IP)-> nope

I had two entries like this:
DNS1= xxx
DNS2=yyy
xxx, yyy being actual nameserver IPs.

I deleted the NM_CONTROLLED line altogether, removed network manager (yum remove network-manager).

I added two nameserver values in resolve.conf, also added GATEWAY parameter in /etc/sysconfig/network.

No luck.

What else can I try?

PS: I might have misled: I *do* have network connectivity- I can access the server with ssh.
Only I cannot connect to internet from inside the server until I manually restart the network (service network restart).
 
Old 11-26-2012, 10:55 AM   #4
x201s
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The last changes seem to have done some good-- now I have internet connection after reboot.

Until now, I had only rebooted the server, but this time, I shut it down and restarted.
Does that make any difference?

Anyway, happy for now for a task accomplished!

Thank you, druuna, for taking time to read.
 
Old 11-26-2012, 11:20 AM   #5
druuna
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Quote:
Originally Posted by x201s View Post
Until now, I had only rebooted the server, but this time, I shut it down and restarted.
Does that make any difference?
A full shutdown and restart is the best way in my opinion. A warm reboot doesn't always restart services etc the way you might expect.

Can you put up the [SOLVED] tag if this is considered solved.
- above the first post -> Please Mark this thread as solved if you feel a solution has been provided.
- -or- -
- first post -> Thread Tools -> Mark this thread as solved
 
Old 11-26-2012, 12:10 PM   #6
x201s
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I had some hint from this page:
http://lukas.zapletalovi.com/2011/03...etworking.html
 
Old 11-26-2012, 12:13 PM   #7
x201s
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Sure, I will tag it as solved.
Thanks!
 
  


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