[SOLVED] Network is unreachable

dhairysheel · 05-29-2012, 10:31 AM

Hi,
I'm using rhel 6.0 after installation,
i set ip through setup cmd.
restarted network service.
then it shows only

shutting down loopback interface [ok]
bringing up loopback interface [ok]

i used
and when i ping to mypc ip it shows

Network is unreachable

below is my ifcfg-eth0 configuration
DEVICE=eth0
HWADDR=00:0c:29:b2:21:a5
NM_CONTROLLED=NO
ON_BOOT=NO
BOOTPROTO=static
IPADDR=192.168.1.4
NETMASK=255.255.255.0
GATEWAY=192.168.1.254
TYPE=Ethernet
IPV6INIT=no
USERCTL=no

Please mention what more changes required.

Didier Spaier · 05-29-2012, 10:46 AM

Is really 192.168.1.4 the address allocated to this machine by your own (local) web server?
Did you check that this server be running?

dhairysheel · 05-29-2012, 03:19 PM

Actually i have done fresh installation through dvd. so no matter of webserver ok!

Didier Spaier · 05-29-2012, 03:32 PM

Then you don't have a local network but are directly connected to the Internet.

You certainly can't use a local address, as 192.168.1.4, unless your machine be behind a NAT router.

There are two ways you can get an IP address : statically or through DHCP

If you don't know the address allocated by your provider, begin with DHCP.

Open a terminal, become root then type:

Code:

ifconfig eth0 up
dhcpcd eth0

After that you can check the IP address with:

Code:

ifconfig eth0

PS If dhcpcd is not available on RHEL 6, use another dhcp client.

lithos · 05-29-2012, 03:47 PM

you should try "ping www.google.com" or some IP for example 192.168.1.254
not the name of your PC, as Linux doesn't know your windows network names (you will need samba ...)
If the ping from IP 192.168.0.254 comes back ok, then it's OK.
and if ping www.google.com works, then it's even better.

dhairysheel · 05-30-2012, 02:00 AM

Thanx! for reply but my pc is not connected to internet and i'm not giving automatic ip.

dhairysheel · 05-30-2012, 02:07 AM

My need is i just want to set static private ip. and it should have to ping himself. but ip is not gone set.
but ifcfg-eth0 file shows ip

below is my ifcfg-eth0 configuration

DEVICE=eth0
HWADDR=00:0c:29:b2:21:a5
NM_CONTROLLED=NO
ON_BOOT=NO
BOOTPROTO=static
IPADDR=192.168.1.4
NETMASK=255.255.255.0
GATEWAY=192.168.1.254
TYPE=Ethernet
IPV6INIT=no
USERCTL=no

when i check ip using ifconfig cmd it shows 127.0.0.1

Didier Spaier · 05-30-2012, 03:42 AM

Well, 127.0.0.1 is any machine's address, when she wants to speak to herself

Obviously this need neither special configuration, nor gateway - unless you want to be able to say "Hey, Myself, may I speak to Myself?"

For instance if you want to access your own CUPS server you type in your browser's address bar: 127.0.0.1:631

Still I do not understand why you want to set another private IP, if you have only one PC?

Or do you want to connect one PC to another?

lonelyman · 05-30-2012, 03:54 AM

maybe you could try:alter this file /etc/sysconfig/network-scripts/ifcfg-eth0,following this code"ONBOOT=no" to "ONBOOT=yes",then
ifdown eth0;ifup eth0,after this,run "ifconfig -a" just to check your eth0 is alive,i wonder if your eth0 is alive.

dhairysheel · 05-30-2012, 05:47 AM

ya! it works ! but i'm not understand why this happened?

Thanking you !

lonelyman · 05-30-2012, 06:59 AM

ah,i met this problem before on my centos 6.2,in fact,i don't know either,ahha,nerver mind it~!

pantdk · 05-30-2012, 06:43 PM

in rhel6/centos6 by default on_boot is no

Since RHEL6 use NetworkManager by default, users that just installed text-only server
/etc/sysconfig/network-scripts/ifcfg-eth0 can look like:
DEVICE="eth0"
HWADDR="XX:XX:XX:XX:XX:XX"
NM_CONTROLLED="yes"
ONBOOT="no"