I was playing with My Virtualbox today and i tried to clone some Centos Servers. But after this, when starting the eth0, it is no more available.
check network:
# ifconfig
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:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Try to start Eth0 device
# ifup eth0 Device eth0 does not seem to be present, delaying initialisation
To Solve this :
Delete networking interface rules file so that it can be regenerated and reboot your CentOS system.
# rm /etc/udev/rules.d/70-persistent-net.rules # reboot
New Mac address has been generated:
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.
# PCI device 0x8086:0x100e (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:fe:c1:03", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
View in file: /etc/udev/rules.d/70-persistent-net.rules and now edit /etc/sysconfig/network-scripts/ifcfg-eth0
NOTE: Red text
Add new HWADDR generated or remove it Remove UUID line
Restart the networking service
# service network restart Shutting down interface eth0: [ OK ] Shutting down loopback interface: [ OK ] Bringing up loopback interface: [ OK ] Bringing up interface eth0: Determining if ip address 192.168.1.99 is already in use for device eth0... [ OK ]
# ifconfig eth0 Link encap:Ethernet HWaddr 08:00:27:FE:C1:03 inet addr:192.168.1.99 Bcast:xxxxxxxx Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fefe:c103/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4400 errors:0 dropped:0 overruns:0 frame:0 TX packets:129 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:387597 (378.5 KiB) TX bytes:19567 (19.1 KiB)
Enjoy!
