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gauravgoel1989 02-06-2013 07:00 AM
Networking doesn't enable at the time of boot however it is configured to be
 
I have a system with Win7 as the Host OS and RHEL6 as a guest OS installed on a VM. I have enabled the networking to start at the time of boot itself but it doesn't and I have to restart the networking after logging into the system to turn it on. Could anyone please help me out, why does it happen? and also the ssh session gets disconnected quite frequently as well?

Following are some output from the system..
[root@RHEL6VM ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:50:22:66
inet6 addr: fe80::20c:29ff:fe50:2266/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2036 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:255214 (249.2 KiB) TX bytes:620 (620.0 b)
Interrupt:19 Base address:0x2000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:16 errors:0 dropped:0 overruns:0 frame:0
TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:960 (960.0 b) TX bytes:960 (960.0 b)
[root@RHEL6VM ~]#

[root@RHEL6VM ~]# chkconfig --list
NetworkManager 0:off 1:off 2:off 3:off 4:off 5:off 6:off
abrtd 0:off 1:off 2:off 3:on 4:off 5:on 6:off
acpid 0:off 1:off 2:on 3:on 4:on 5:on 6:off
atd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
auditd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
autofs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
avahi-daemon 0:off 1:off 2:off 3:on 4:on 5:on 6:off
bluetooth 0:off 1:off 2:off 3:on 4:on 5:on 6:off
certmonger 0:off 1:off 2:off 3:off 4:off 5:off 6:off
cgconfig 0:off 1:off 2:off 3:off 4:off 5:off 6:off
cgred 0:off 1:off 2:off 3:off 4:off 5:off 6:off
cpuspeed 0:off 1:on 2:on 3:on 4:on 5:on 6:off
crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
cups 0:off 1:off 2:on 3:on 4:on 5:on 6:off
dnsmasq 0:off 1:off 2:off 3:off 4:off 5:off 6:off
firstboot 0:off 1:off 2:off 3:off 4:off 5:off 6:off
haldaemon 0:off 1:off 2:off 3:on 4:on 5:on 6:off
httpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
ip6tables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
iptables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
irqbalance 0:off 1:off 2:off 3:on 4:on 5:on 6:off
kdump 0:off 1:off 2:off 3:on 4:on 5:on 6:off
lvm2-monitor 0:off 1:on 2:on 3:on 4:on 5:on 6:off
mdmonitor 0:off 1:off 2:on 3:on 4:on 5:on 6:off
messagebus 0:off 1:off 2:on 3:on 4:on 5:on 6:off
microcode_ctl 0:off 1:off 2:on 3:on 4:on 5:on 6:off
mysqld 0:off 1:off 2:off 3:off 4:off 5:off 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
netfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
nfs 0:off 1:off 2:off 3:off 4:off 5:off 6:off
nfslock 0:off 1:off 2:off 3:on 4:on 5:on 6:off
nscd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
nslcd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
ntpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
ntpdate 0:off 1:off 2:off 3:off 4:off 5:off 6:off
oddjobd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
openct 0:off 1:off 2:on 3:on 4:on 5:on 6:off
pcscd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
portreserve 0:off 1:off 2:on 3:on 4:on 5:on 6:off
postfix 0:off 1:off 2:on 3:on 4:on 5:on 6:off
psacct 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rdisc 0:off 1:off 2:off 3:off 4:off 5:off 6:off
restorecond 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rhnsd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
rpcbind 0:off 1:off 2:on 3:on 4:on 5:on 6:off
rpcgssd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
rpcidmapd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
rpcsvcgssd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rsyslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off
saslauthd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
smartd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
snmpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
snmptrapd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
sssd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
sysstat 0:off 1:on 2:on 3:on 4:on 5:on 6:off
udev-post 0:off 1:on 2:on 3:on 4:on 5:on 6:off
vsftpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
wpa_supplicant 0:off 1:off 2:off 3:off 4:off 5:off 6:off
ypbind 0:off 1:off 2:off 3:off 4:off 5:off 6:off
[root@RHEL6VM ~]#

[root@RHEL6VM ~]# service network restart
Shutting down interface eth0: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up interface eth0: [ OK ]
Bringing up loopback interface: [ OK ]
[root@RHEL6VM ~]#

[root@RHEL6VM ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:50:22:66
inet addr:20.198.242.107 Bcast:20.198.242.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe50:2266/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9834 errors:0 dropped:0 overruns:0 frame:0
TX packets:371 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1334205 (1.2 MiB) TX bytes:47109 (46.0 KiB)
Interrupt:19 Base address:0x2000

eth0:1 Link encap:Ethernet HWaddr 00:0C:29:50:22:66
inet addr:20.198.242.108 Bcast:20.198.242.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:19 Base address:0x2000

eth0:2 Link encap:Ethernet HWaddr 00:0C:29:50:22:66
inet addr:20.198.242.109 Bcast:20.198.242.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:19 Base address:0x2000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:16 errors:0 dropped:0 overruns:0 frame:0
TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:960 (960.0 b) TX bytes:960 (960.0 b)

[root@RHEL6VM ~]#

druuna 02-06-2013 07:21 AM
Hi,

Is the following option present in /etc/sysconfig/network-scripts/ifcfg-ethX:
Code:
ONBOOT=yes

gauravgoel1989 02-07-2013 01:41 AM
Yes it is present.
 
Yes it is present.

druuna 02-07-2013 04:45 AM
Did you check the log files to see if anything suspicious is going on during boot?

I'd start with checking /var/log/boot and the output of the dmesg command. But do check the other logs as well.

wstewart 02-10-2013 12:06 AM
First make sure that in the "/etc/sysconfig/network" file you have "NETWORKING=yes"


At the very top of your chkconfig --list, NetworkManager is turned off. That may or may not be intentional but NetworkManager starts the dhclient process when it is being used so that you can get an ip address through dhcp. If you intentionally turned it off, make sure ifcfg-eth0 says "NM_CONTROLLED=no" so that NetworkManager isn't in control of that interface.

minad 02-10-2013 11:34 PM
I have same problem with gauravgoel1989! Anyone can help us to fix it..thanks


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