CentOS: eth0 not starting on boot

http://serverfault.com/questions/405661/centos-eth0-not-starting-on-boot

 

Whenever I reboot a CentOS Hyper-V VM, eth0 does not start automatically. All I need to do is perform ifup eth0 and all is fixed, but that isn't feasible from ssh! I am starting in runlevel 3. [root@localhost ~]# cat /etc/*release* CentOS release 6.2 (Final) After I perform ifup eth0 on the console: [root@localhost ~]# ifconfig eth0 Link encap:Ethernet HWaddr 00:15:5D:2B:2B:07 inet addr:10.10.0.3 Bcast:10.10.0.255 Mask:255.255.255.0 inet6 addr: fe80::215:5dff:fe2b:2b07/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:34 errors:0 dropped:0 overruns:0 frame:0 TX packets:49 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4656 (4.5 KiB) TX bytes:6399 (6.2 KiB) Interrupt:9 Base address:0xa000 [root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 BOOTPROTO=none IPADDR=10.10.0.3 NETMASK=255.255.255.0 GATEWAY=10.10.0.1 USERCTL=no ONBOOT=yes [root@localhost ~]# chkconfig --list | grep network network 0:off 1:off 2:on 3:on 4:on 5:on 6:off After trying to turn off Network Manager [root@localhost ~]# chkconfig NetworkManager off error reading information on service NetworkManager: No such file or directory [root@localhost ~]# service NetworkManager status NetworkManager: unrecognized service The most recent clean boot [root@localhost ~]# grep eth0 /var/log/messages Jul 7 02:12:44 localhost kernel: eth0: Digital DS21140 Tulip rev 32 at MMIO 0xfebff000, 00:15:5d:2b:2b:07, IRQ 9. Jul 7 02:13:15 localhost kernel: eth0: Using EEPROM-set media 100baseTx-FDX. [root@localhost ~]# dmesg | grep eth0 eth0: Digital DS21140 Tulip rev 32 at MMIO 0xfebff000, 00:15:5d:2b:2b:07, IRQ 9. eth0: Using EEPROM-set media 100baseTx-FDX. eth0: no IPv6 routers present The only problems I have EVER seen, is when I do the command of ifup eth0 I get the following errors, but eth0 still gets started: [root@localhost ~]# ifup eth0 /etc/sysconfig/network-scripts/ifup-ipv6: line 56: /etc/sysconfig/network: No such file or directory /etc/sysconfig/network-scripts/ifup-aliases: line 125: /etc/sysconfig/network: No such file or directory networking centos eth0 share|improve this question edited Jul 7 '12 at 16:36 asked Jul 7 '12 at 12:12 Cameron Aziz 15518

Which CentOS release? 5.x or 6.x? – Kev Jul 7 '12 at 14:17 it is centos 6.2 – Cameron Aziz Jul 7 '12 at 16:04

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Hmm. From your last message, look for the /etc/sysconfig/network file. I have: $ cat /etc/sysconfig/network NETWORKING=yes You can also have (on my CentOS 5 box): NETWORKING=yes HOSTNAME=foo.example.org GATEWAY=192.168.1.1 Documentation is here (at least for 5, which should be very similar) I'm not sure what the default is for the "NETWORKING" setting. It's possible it's "no" and that's why it's not starting on boot.