Networking :: "cannot Activate Network Device Eth0"?
Dec 28, 2010
The problem I'm having is on a CentOS4 machine. I don't use CentOS regularly (Ubuntu and Mint, yes) so I'm not sure if this is something that is particular to CentOS or not. I have this workstation that controls a microscope controller. The drives in this computer are some POS Seagate drives where the data storage drive has already conked out more than once. I think this time there was a problem with the OS drive that caused a lot of filesystem errors. I wasn't able to boot the OS at first but I ran fsck from a liveCD and was able to fix the (hundreds of) errors and the OS can now boot from the drive. The problem ave now is the ethernet does not work. I know there's not a problem with the ethernet controllers because I can access the internet through the liveCD. When I try to activate eth0, or eth1, I get the following error:Quote:
Cannot activate network device eth0!
network-functions: line 180: ip: command not found
WARNING: /lib/modules/2.6.9-89.0.9.ELsmp/modules.symbols line 1: ignoring bad line starting with 'GROUP'
[code]...
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Apr 29, 2010
When i wan to activate device in network configuration, it pop out with "CANNOT ACTIVATE NETWORK DEVICE ETH0". There is a sentence after this also : "rlt8129 device eth0 does not seem to be present, delaying initialization."
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Jan 7, 2010
I just added a 2 port network card to a system that is running Fedora 11, but it is INACTIVE. I open the Network Device Control to activate it but there is no network ports in Network Device Control. It is empty.It looks like the system recognize the card and loaded correct driver.
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May 21, 2010
Cannot activate network device eth0!" device eth0 does not seem to be present, delaying initialization". i cannot find my network card while i set up network configuration
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Jul 22, 2009
Having trouble with wireless and FC11, eth0 is ok. When I try to activate wlan0 through system-config-network 1.5.97, I get msg: Error for wireless request "Set Mode" (8B06) : SET failed on device wlan0 ; Invalid argument. Determining IP information for wlan0... failed. This is a compaq laptop.
<uname -r>
2.6.29.6-213.fc11.i686.PAE #1 SMP Tue Jul 7 20:59:29 EDT 2009 i686 athlon i386 GNU/Linux
<lspci>
The wireless card is Atheros Communications Inc. AR242x 802.11abg Wireless PCI Express Adapter
(rev 01)
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May 21, 2011
I am unable to connect to the internet in fedora (XP connects fine) I normally use wifi, but have also checked the wired connection.
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Mar 4, 2009
how can i activate eth0 on terminal ?
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Oct 24, 2009
When I activate eth0, the system says that the eth0 seems not exist. However, I can surf in the internet.
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Jul 25, 2010
Code...
connection is set to connect automatically using dhcp... used to work, after a latest updates basically stopped working.
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Dec 26, 2010
i install kernel rpm after i boot that kernel network not working kernel name : kernel-rt-trace-2.6.24.7-132.el5.centos.i686 [URL] error "Bringing up interface eth0: Device eth0 has different MAC address than expected, ignoring."
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Mar 17, 2010
I just brought up FC12 on our VSphere to begin testing..The nic did not configure properly for some reason.. I was able to go to command line, and do an "ifup ifcfg-eth0" and DHCP got an address. Go into GNOME - System-Administration - Network , or system-config-network the "Activate/Deactivate" is greyed out. Also, GNOME - System-Administration - Network Device Control show NO device..
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Feb 27, 2011
I have installed Open SUSE in my DELL server which has 2 broadcom NIC cards, it showing both the NIC cards in Network configuration in YAST ,but it showing as not configured and not connected . Kernel device eth0,wlan0 are not present. In device manager also 2 Broadcom nic cards are detected.
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Apr 19, 2010
I have setup a dual boot machine which has OS of Windows Vista (32 Bit) / RHEL 5. The LAN Card details are - Atheros L2 Fast Ethernet 10/100 Base T - Controller. The said Network Card works fine with the ADSL Connection in Windows OS, but does not seem to initialise in Linux. When I run "ifconfig" in terminal window it gives away the prompt - "eth0 no such device exists".Although it shoes the loopback adapter (lo) device working fine. I forgot to mention over here, I have just started with Linux. So, I request "the" Linux Gurus to help me out with this one.
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Jul 28, 2010
I just did a clean install and ran system-config-network from command line to fix my IP settings. Everything works but when I reboot, my NIC is gone from #ifconfig -a
I have to login to the GUI and go to System --> Administration --> Network --> "Click on my NIC" --> check the box that says "Activate device when computer starts"
Once this box is checked, everything works fine. - I have turned off NetworkManager and just use the network service to manage my ip settings.
I was wondering if this "Activate device when computer starts" can be done through the command line without having to access the GUI?
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Dec 14, 2010
I have to do a project on network security.For that i have to capture the packets from the device. I installed libpcap tool in ubuntu. If I give ifconfig -a it lists out eth0, wlan0, lo. I am able to connect to the internet via eth0. But when I give
#include <stdio.h>
#include <pcap.h>
int main()
{
char *dev, errbuf[PCAP_ERRBUF_SIZE];
[Code]...
It says device is null. I'm not able to run sniffex.c program also. All I want to do is to capture the live network level packets and analyse them.
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Jan 31, 2011
While i am configuring network setting on backtrack4. i was running my backtrack on vmware workstation and NAT is bridged to physical mem like it was said on the tutorial that watched. i typed ifconfig eth0 up, and hit enter, as well as dhclient eth0 up, but resulted in different output. it says "no such device" is written and i would like to configre this problem.
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May 5, 2010
My network name is eth2 it was changed by some reason and now i got these errors... i installed, reinstalled, re re installed, tried to run the asistant but no luck :/
Code:
* Stopping the Firestarter firewall...
eth0: error fetching interface information: Device not found
eth0: error fetching interface information: Device not found
eth0: error fetching interface information: Device not found
[code]....
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Dec 21, 2010
Installed Centos 5 on IBM T60P laptop. Intel 82573L Gigabit ethernet controller. Keep getting this erro message, "e1000 device eth0 does not seem to be present, delaying initialization."
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Nov 30, 2010
Installed a TP-Link TG-3269 Gigabit card in a machine running OS 11.3 32 bit, when I go into Yast, Network Devices, Network to try configuring the card I get this errormsg: Unable to configure the network card because the kernel device (eth0, wlan0) is not present. This is mostly caused by missing firmware (for wlan devices). See dmesg output for details. Couldn't find any mention of the card in dmesg's output, (though the 8139 onboard card is in there) there is some stuff about pci host bridge but I don't know whether they would be relevant or not
The chip on the card says it's rtl8169sc but lspci lists it as being 00:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. Device 8369 (rev 10) Done some googling and there don't seem be any drivers for a Realtek 8639 and it returns no matches from a search on realtek's site, but there is a driver there for rtl8169sc chips, which I downloaded and installed, no errors when installing it Even after a reboot I still get the same error in Yast's Network Settings screen, lspci still lists it as 8369 and the device isn't listed at all if I run ifconfig
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Mar 29, 2010
I just finished installing Fedora 12 on a rack mount server. I was modifying the /etc/sysconfig/network-scripts/ifcfg-eth0 file to use a static IP address, but now nothing works. The device does not boot on start up or anything.Currently, ifcfg-eth0 looks like:
Quote:
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=none[code].....
The eth0 device does not start on boot; the server does not get the IP address, is not reachable over the network, and will not connect to the internet....
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Jun 17, 2009
I have swapped out four known working, different bran network cards. Each one I get the same error as in the subject. If I boot to a Live CD such as CentOs 5.3 LiveCD both Nics are given an IP. This seems to only be happening with my CentOs 5.3 server install.I noticed the CentOS Live CD the Nics were reversed from eth0 to eth1 and eth1 to eth0.
At the moment as of the output of the commands, I am running two identical Nics, since the first one has always worked. I have previously used an rtl8139, 3com c3905-TX, onboard Rhine III based (now disabled) Here are steps I have done to try and figure this out:
Quote:
[root@centos ~]# lspci | grep -i eth
00:0a.0 Ethernet controller: VIA Technologies, Inc. VT6105/VT6106S [Rhine-III] (rev 86)
00:0e.0 Ethernet controller: VIA Technologies, Inc. VT6105/VT6106S [Rhine-III] (rev 86)
Quote:
[root@centos ~]# cat /var/log/dmesg | grep -i eth
eth0: VIA Rhine III at 0xee800000, 00:1b:11:bb:17:7d, IRQ 177.
eth0: MII PHY found at address 1, status 0x786d advertising 05e1 Link 45e1.
[code]....
I went through the system-config-network-tui. I copied /etc/sysconfig/network-scripts/ifcfg-eth1 to the ifcfg-eth0 and edited for sanity. and as stated earlier, have swapped out four different nics for eth0, and booted to two different LiveCD's. Both LiveCD's work fine.
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Apr 30, 2011
I am running a CentOS 5.6 as a Virtual Machine on my Laptop. And, to connect to internet I am using a datacard (usb modem) device (Tata Photon +).
Now, internet is working well on my VM through interface ppp0
The problem is that when I start my interface eth0, internet (running through ppp0) stops.
Quote:
[root@kick ~]# ip route show
172.29.242.9 dev ppp0 proto kernel scope link src 14.99.211.189
default dev ppp0 scope link
[root@kick ~]# ip addr sh
1: lo: <LOOPBACK> mtu 16436 qdisc noop
[Code]....
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Aug 10, 2010
Yesterday I did an upgrade and today my box is unable to connect to the internet.
I have tried another cable, it didn't help.
Basically NetworkManager does not connect eth0 to the network, if I try to run ifup from the command line I get:
Code:
I can see in network configuration settings, that the device has been correctly detected and eth0 interface is correctly activated, yet when I try to uncheck the box manage by NetworkManager and start it manually, it tells me that the cable is disconnected... I've tried two different cables, different ports on my router - no help.
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Jun 16, 2010
I am running fedora vm under XP host and using NAT connection to the Internet. It usually works fine, but some time the connection is just lost. I went menu System->Admin->Network and see the interface eth0, but I cannot activate or deactivate. The status is inactive. (when the connect works, the status is active). so I try "ifdown eth0" and "ifup eth0" command, and got
"Error: Connection activation failed: Device not managed by NetowrkManger
The menu System->Admin->Network device control show no interface.
I am not sure what happened.
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Aug 10, 2010
How ubuntu 9.10 netbook is36 activate its network connection?
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Nov 22, 2010
i'm try to find what i can do to reactivate the network icon (where i can select the wifi network i want to connect), which are usualy on the 'tableau de bord'
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May 28, 2009
I've been running F10 since it first came out, and I was happy to see it was the first Fedora release that automatically recognized my Atheros wireless card. I have to run system-config-network and press the "activate" button when I start the machine, but that's ok and no big deal. But today, for whatever reason,in system-config-network, the "activate" and "deactivate" buttons are grayed out and I cannot start the device so I have no network access. When I boot the machine into Windows, it works fine.
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Sep 29, 2010
New to ubuntu. I love the OS. Everything works great except for the network connection. It tells me I need to activate the b43 drivers with fwcutter, but here are the following problems:
1) I can't download and install the drivers b/c I can't connect to the internet wired or wireless.
2) I can't find the website to download the appropriate drivers (I've looked for hours)
3)I'm not too sure how to install them since I don't have a background in coding.
I really like ubuntu, I just need network working.
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Mar 10, 2011
My Network manager is missing (it is usually has a short-cut on the desktop-bar, which are monitor pictures, next to the sound short-cut). Does anybody know how to activate it again (terminal-based command or etc)? See my attachment, i made a circle sign on the missing network-manager.
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Sep 23, 2009
I installed Fedora 11 last night, and it seemed to go OK. The trouble is, I cannot get a wireless connection to the internet. The system seems to recognize my wireless USB adapter, but the buttons to activate the device remain grayed-out no matter what I try. I ran through all of the steps in the help menu (still grayed-out); I tried deleting and adding the device (no go); I tried to run the installation disk that came with the USB adapter (wouldn't run); I pulled the drivers off of the installation disk (Fedora couldn't recognize the file type); I changed it from "wlan" to "eth0" to "eth1"... but still no love!
This doesn't seem like a problem between the adapter and the router... the USB adapter and my PC can see each other, but can't "talk" to each other.
Info:
PC - Dell Optiplex GX50 (circa 2001)
OS - Fedora 11
USB adapter - Linksys WUSB54GC
Wireless Router - Linksys WRT54G (reflashed with dd.wrt)
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