network configuration for Redhat 7

byran cheung · 01-08-2015, 02:14 AM

I just installed Redhat 7 and try to config the network , add the IP address to network card , but I got the problem.

I modify the file /etc/sysconfig/network-scripts/ifcfg-enp0s3 , the configuration is as below , and then reboot .

DEVICE="enp0s3"
NETBOOT="yes"
HWADDR="08:00:27:15:38:B7"
TYPE="Ethernet"
BOOTPROTO="none"
NAME="enp0s3"
UUID="462f4834-4fe7-43a7-84e7-83b2722e94c1"
ONBOOT="yes"
IPADDR="192.168.1.1"
NETMASK="255.255.255.0"

After reboot , I use "ip addr show" still not shown the ip address , the ip address is still blank , would advise what is wrong ? thanks

vincix · 01-08-2015, 03:52 AM

Quote:

Originally Posted by byran cheung

I just installed Redhat 7 and try to config the network , add the IP address to network card , but I got the problem.

After reboot , I use "ip addr show" still not shown the ip address , the ip address is still blank , would advise what is wrong ? thanks

If you search in a default Centos 7 installation, you'll see that the actual path to the file is /etc/sysconfig/network-scripts/enp0s3 without the ifcfg preceeding it.

So I'd suggest:

Code:

cd /etc/sysconfig/network-scripts
mv ifcfg-enp0s3 enp0s3

Reboot and see if it works.

vincix · 01-08-2015, 04:04 AM

I've tried to move ifcfg-enp0s3 to enp0s3 and the other way around, but in my case it works fine either way.

Try to see if it's only a problem with getting your network card up:

Code:

# ifconfig enp0s3 up

Then check if the configuration from /etc/sysconfig/network-scripts/ifcfg-enp0s3 (or enp0s3) has been applied:

Code:

# ifconfig enp0s3

or

Code:

# ip addr show dev enp0s3

byran cheung · 01-08-2015, 04:08 AM

Quote:

Originally Posted by vincix

If you search in a default Centos 7 installation, you'll see that the actual path to the file is /etc/sysconfig/network-scripts/enp0s3 without the ifcfg preceeding it.

So I'd suggest:

Code:

cd /etc/sysconfig/network-scripts
mv ifcfg-enp0s3 enp0s3

Reboot and see if it works.

thanks reply , but I tried it , not work.

byran cheung · 01-09-2015, 12:31 AM

Quote:

Originally Posted by vincix

I've tried to move ifcfg-enp0s3 to enp0s3 and the other way around, but in my case it works fine either way.

Try to see if it's only a problem with getting your network card up:

Code:

# ifconfig enp0s3 up

Then check if the configuration from /etc/sysconfig/network-scripts/ifcfg-enp0s3 (or enp0s3) has been applied:

Code:

# ifconfig enp0s3

or

Code:

# ip addr show dev enp0s3

thanks reply , but not work ..