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Old 07-07-2014, 11:06 PM   #1
Huamin
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Problem with the network


Hi,
It seems there are some problem with the network below, as I cannot connect to the network, by the machine.
https://dl.dropboxusercontent.com/u/40211031/t749.png

what to adjust?
 
Old 07-08-2014, 02:57 AM   #2
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Hi,

your physical network, eth0 is down. Was it working in the past? Did you change something?

Evo2.
 
Old 07-08-2014, 03:05 AM   #3
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I did yesterday set up this OS, so no new change was ever applied to it. Thanks.
 
Old 07-08-2014, 03:44 AM   #4
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Hi,

ok, so you need to go ahead and configure your network. If you want information on how to do that you'll need to tell us about your setup. Eg dhcp or static? want to use network manager or /etc/sysconfig/? Using gui or command line? Otherwise please check the documentation.

Evo2.
 
Old 07-08-2014, 04:14 AM   #5
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Thanks. Here is eth0

eth0 Link encap:Ethernet HWaddr 08:00:27:BA:06:E6
inet6 addr: fe80::a00:27ff:feba:6e6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:258 (258.0 b)

I want to have one specific IP like 192.168.168.1 to eth0. what to adjust?
 
Old 07-08-2014, 04:22 AM   #6
evo2
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Hi,

set up your /etc/sysconfig/network-scripts/ifcfg-eth0 as shown at the start of 9.2.1 in
https://access.redhat.com/documentat...nterfaces.html

Set the value of IPADDR as appropriate.

Evo2.
 
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Old 07-08-2014, 11:23 PM   #7
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Thanks.
I adjust this file

/etc/sysconfig/network-scripts/ifcfg-eth0

to be

DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes
NETMASK=255.255.255.0
IPADDR=192.168.168.1
USERCTL=no

but I still get this

eth0 Link encap:Ethernet HWaddr 08:00:27:BA:06:E6
inet6 addr: fe80::a00:27ff:feba:6e6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:8856 (8.6 KiB)

after reboot. why?

Last edited by Huamin; 07-08-2014 at 11:42 PM.
 
Old 07-09-2014, 12:10 AM   #8
evo2
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Hi,

are you serivces configured correctly? Eg what is the output of the following?
Code:
chkconfig --list |grep -i net
Also what happens if you try to bring up that interface? Eg output of
Code:
ifup eth0
Evo2.
 
Old 07-09-2014, 12:46 AM   #9
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Problem with the network

Thanks a lot. Here are what I've got

https://dl.dropboxusercontent.com/u/40211031/out.txt
 
Old 07-09-2014, 01:07 AM   #10
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Hi,

looks like you should stop and disable NetworkManager. Eg
Code:
service NetworkManager stop
chkconfig NetworkManager off
Then try to bring up eth0 again.
Code:
ifup eth0
If there are any errors post them and the output of
Code:
ifconfig eth0
service network status
Evo2.
 
Old 07-09-2014, 02:01 AM   #11
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Thanks a lot.

Here are what I've got

[root@CentOS65x64 huamin]# service NetworkManager stop
Stopping NetworkManager daemon: [ OK ]
[root@CentOS65x64 huamin]# chkconfig NetworkManager off
[root@CentOS65x64 huamin]# ifup eth0

Determining IP information for eth0... failed.
[root@CentOS65x64 huamin]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 08:00:27:BA:06:E6
inet6 addr: fe80::a00:27ff:feba:6e6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:109 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:33374 (32.5 KiB)

[root@CentOS65x64 huamin]# service network status
Configured devices:
lo eth0 eth0_bk
Currently active devices:
lo eth0 eth1 virbr0
[root@CentOS65x64 huamin]#
 
Old 07-09-2014, 02:05 AM   #12
evo2
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Hi,

I just noticed that you have BOOTPROTO=dhcp in your ifcfg-eth0 file. It should be set to none as in the first example in the documentation I linked to.

Evo2.
 
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Old 07-09-2014, 09:49 PM   #13
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Many thanks Evo2.

Can I have the similar file like

ifcfg-eth1

to eth1 and then put dhcp to that, as now eth1 has not been assigned with the IP properly.

Actually, this OS is running within Virtualbox, on which I've put "internal network" to Adapter 1 and "Bridged adapter" to Adapter 2, and this is why I want a specific IP to eth0.

Before the change of the file to eth0, everything was fine to eth1.

Last edited by Huamin; 07-09-2014 at 09:56 PM.
 
Old 07-09-2014, 10:10 PM   #14
evo2
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Hi,

there is nothing to stop you adding ifcfg-eth1. However, I strongly suggest you read chapter 9 of the documentation I linked to. If something there doesn't make sense or seems incomplete please ask here.

Evo2.
 
Old 07-09-2014, 10:55 PM   #15
Huamin
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Hi,
Here is the current ifcfg-eth0 file

DEVICE=eth0
TYPE=Ethernet
NM_CONTROLLED=yes
BOOTPROTO=none
ONBOOT=no
NETMASK=255.255.255.0
IPADDR=192.168.168.1
USERCTL=no

but I have a problem to eth1 below

https://dl.dropboxusercontent.com/u/40211031/t756.png

what to adjust?
 
  


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