Ubuntu Networking :: Eth0 Interface Not Working After Upgrade

Aug 13, 2010

I'm having the same Harker2010 's problem.Running 10.04 LTS on a Dell latitude D-820, and switching between lan and wifi worked OK until last upgrade.Harker2010's screenshots are also valid for my problem. I've tried everything I see on this post but the problem still there.

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Networking :: Ignoring The Unknown Interface Eth0=eth0?

Dec 18, 2010

I'm running a dual boot Ubuntu 10.04/Backtrack 4 (Ubuntu 8.10) system. I can get internet in the BT4 side but not in the Lucid side. In Lucid I can ping my router, and the network manager says I'm good to go, but I can't get to any web sites. It all started when I tried to put my laptop on another network by mimicking the settings of a computer I had just unplugged from the network. MAC address and all.

ifconfig eth0:

Code:

eth0 Link encap:Ethernet HWaddr 00:1f:16:ba:4c:8c
inet addr:10.136.9.147 Bcast:10.136.9.159 Mask:255.255.255.240
inet6 addr: fe80::21f:16ff:feba:4c8c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

[code]....

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CentOS 5 Networking :: Kernel Rpm Install After Error "Bringing Up Interface Eth0: Device Eth0 Has Different MAC Address Than Expected, Ignoring"

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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Ubuntu Networking :: Eth0 Interface Went Missing

Mar 16, 2011

I have already tried reloading the drivers, restarting the interface (which is missing) and every other solution I found on this forum (well... not exactly all of them but many of them) uname -a gives Linux hostname 2.6.35-27-generic #48-Ubuntu SMP Tue Feb 22 20:25:46 UTC 2011 x86_64 GNU/Linux

[Code]....

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General :: Stop And Restart Ethernet Connection Ubuntu 9.10 - Ignoring Unknown Interface Eth0=eth0

Mar 8, 2010

If I uncheck and recheck "Enable Networking" in the Network Manager Applet 0.7.996 I would expect the wired network to disconnect (which it does) and reconnect (which it does NOT). So I tried sudo ifdown eth0 and got

Quote:

Ignoring unknown interface eth0=eth0.

ifconfig tells me

Quote:

eth0 Link encap:Ethernet HWaddr 00:25:64:e8:18:2c
inet addr:192.168.0.112 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::225:64ff:fee8:182c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

[code]....

so I am at a loss. How do I stop and restart the network interface short of rebooting the machine?

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Ubuntu :: Eth0 Doesn't Exists For Firestarter - Eth0: Error Fetching Interface Information: Device Not Found

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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Fedora Networking :: Why Primary Interface Is Eth1 Instead Of Eth0?

Jan 31, 2010

I have two network interfaces on my computer but only one of them is connected to an Ethernet cable. Until now on every Fedora release, the activated primary interface has been named as eth0 and everything has always worked well without any problem. Recently I switched to Fedora Core 12 and surprisingly I observed that for the first time, my primary interface has been considered by the system to be eth1 instead of eth0. I tried to replace the content of ifcfg-eth0 by ifcfg-eth1, yet system gave me an error that there was MAC address mismatching. I conserved their MAC addresses in their files and just replaced other connection parameters ( such as IP ADDR, NETWORK, NETMASK, etc.) but it did't work. When I do "server network restart", the command blocks.

As I try to install oracle on this system, regarding the fact that oracle requires static network configuration on the primary network interface, I don't know how to proceed in order to set eth0 as my primary interface (or rather set the current eth1 to eth0 because it is actually eth1 that refers to my activated primary network card).Just one more time, I would like to remark, that with previous versions of the Fedora Core, on the same computer (with the very same two network cards) I never had problem and I had installed oracle on the system with success, having the statically configured eth0 correctly detected by the system.

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Red Hat :: Add IPs To A Network Interface As Virtual Interface Like Eth0:0?

Apr 14, 2011

I found multiple sites explaining how to add IPs to a network interface as virtual interface like eth0:0. However I can add IPs to an interface as well using the ip command: ip a a 192.168.2.2/24 dev eth0 What I want to know is how I can make this persistent on rhel/centos.

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Debian :: Nagios Web Interface Stopped Working After Squeeze Upgrade

Mar 5, 2011

I recently updated to squeeze following the Debian release note steps, and most everything went smoothly. However, I'm now unable to get into the Nagios web interface. The service is still running and sends email notifications of issues as usual, but logging into the web interface gives me a 403 Forbidden error.

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Ubuntu Networking :: Eth0 Gone After Upgrade, Still Gone After Downgrade?

Jun 14, 2010

I have a similar problem. My eth0 also disappeared after an upgrade to Ubuntu 10.04, and didn't come back after downgrading back to 9.10. The LEDs on my ethernet port are *not* flashing. Does this mean my network card is dead, or is there any hope I can get back online?

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Ubuntu Networking :: Eth0 Stopped Working?

May 20, 2010

i installed and ran System Profiler & Benchmark ran a test. then i rebooted and turned off ACPI/PowerNow. at this point i realized my network card had gone down so i went back an turned the ACPI on. nothing changed.

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Ubuntu Networking :: Eth0 Not Working After Rebooting?

Sep 5, 2010

I'm not sure what's going on, but I have two computers that both aren't working after I reboot them. When I boot up the machine and do ifconfig, eth0 is missing.If I issue $sudo ifup eth0 then the ethernet is working, but I'm not sure why I'm booting up without a connection. Even after $sudo ifup eth0The networking app that's in the taskbar is missing.looked at dmesg and it looks normal$dmesg | grep -i ethmy interfaces fileiface eth0 inet staticaddress 192.168.15.146netmask 255.255.255.0gateway 192.168.15.1

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CentOS 5 Networking :: Ifcfg-eth0 Rewritten On Each Boot After Upgrade To 5.3 From 5.2

May 12, 2009

I have just upgraded a CentOS 5.2 box to Centos 5.3

I did have a bridged networking setup for Virtualbox which worked well. eth0 was bridged with br0. br0 boot protocol was DHCP and it sent its DHCP_HOSTNAME to the windows DHCP servers.

since the upgrade the br0 does not get an address but the eth0 does. I found that the scripts in /etc/sysconfig/network-scripts/ifcfg-* are getting rewritten.

I figure I may not need to have a bridge any more so I stripped that out to try to get a simple network setup working. I now just have eth0. I edited /etc/sysconfig/network-scripts/ifcfg-eth0 so that it looked like this,

~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# Attansic Technology Corp. L1 Gigabit Ethernet Adapter
DEVICE=eth0
BOOTPROTO=dhcp

[Code].....

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Networking :: Eth0 Is Not Working In RHEL5

Sep 8, 2010

I have installed RHEL-5 (2.6.18-53) on my Desktop (ASUS Motherboard with Realtek PCIe GBE Family Controler 8168). After installation eth0 is not detecting. I downloaded R8168 drivers from Relatek site, but I am unable to install as it's throwing the following error.

Wed Sep 8 21:49:41 IST 2010
make -C src/ clean
make[1]: Entering directory `/root/Desktop/REALTEK/r8168-8.019.00/src'
rm -rf *.o *.ko *~ core* .dep* .*.d .*.cmd *.mod.c *.a *.s .*.flags .tmp_versions Module.symvers Modules.symvers Module.markers *.order

[Code]......

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Ubuntu Networking :: Easytether + Auto Eth0 Not Working?

Oct 24, 2010

I'm using Easytether through my HTC Droid for interwebs running Ubuntu 10.04. However I also have a home network. However when I hardwire into the network via a D-Link router (Auto eth0) my internet no longer works. The same is true when I plug in my iPod. The Droid loses it's connection. What is the problem?

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Ubuntu Networking :: 10.04.1 Desktop - Bridge Stops Eth0 Working

Oct 13, 2010

I am trying to get a network bridge configured but every time I make the changes and restart networking (or reboot) eth0 appears to come up OK but I can no longer talk to the outside world via it. With no bridge defined, I can talk to the web using either wireless or wired; wicd is configured to switch to a wired connection when available (got rid of Network Manager. It didn't recognise eth0(!)).

I want to use the bridge so virtual machines (LXC containers) can talk to the web when the machine is wired to the wireless router. Eth0 gets its IP address (192.168.1.4) via DHCP from the router and I want to bridge to another subnet, 192.168.154.n say, and the containers will have fixed IP addresses 192.168.154.101, 102, 103 etc.

[Code]...

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Fedora Networking :: Dns Not Working Until Disable And Reenable Eth0?

Oct 18, 2009

I've got a 64 bit home server system that was upgraded from FC2 to 7, 9, now 11. I've now got a weird situation where dns inquiries will not work when I reboot the machine, until i restart eth0. When I reboot, I can open firefox on the machine, put in the IP of my dsl router, and look at it's settings just fine. All other internet uses, whether it's yum,squid, or etc. comes back with the usual name server not found messages. I've got thenetwork setup to use the named on this server, ( the web's a tad bit slower when I set it up to use ISP's windows nameservers, go figure).

Anyway, a few years ago I set up the machine to use the network service to bring theseinterfaces up. (I believe this was because the early versions on Networkmanger had some issues. In an attempt to fix this issue I reset Networkmanger start at startup, and reset up eth0 and 1 to be controlled by it.I then got namserver1=XXX.XXX.XXX.XXX in resolve.conf at reboot..(yeah they were really X's, I'm not hiding an ip here) I tried going intonsswitch.conf, found the line hosts: files mdns4_minimal [NOTFOUND=return] dnsand changed it to:hosts:files dns mdns4_minimal [NOTFOUND=return]No joy, I still have to do an ifdown eth0 and an ifup eth0 to get dns to work..

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Networking :: Eth0 Works Great - Eth1 Not Working ?

May 14, 2010

Ok, so eth0 is up and working great. eth1, however, comes up with a link light, however the packet counters in ifconfig remain at 0. Appears that eth1 isn't working.

Here's my setup:

-Dell latitude CPi laptop with 2 PCMCIA network cards and no built-in ethernet.
-Slackware v11
-eth0 is connected inside my router on my 192 network. Static address with good connectivity
-eth1 is connected on the other side of my router in promiscuous mode in order to listen to the traffic coming into my network.

Troubleshooting so far: I have switched the pcmcia cards between slots and regardless of which card is in eth0 or eth1, eth0 works and eth1 does not. I have also switched the card dongle between cards as well as the ethernet cabling between the cards. With any of the combinations eth0 works like a champ but eth1 does not, so I think I've ruled out hardware problems.

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Fedora Networking :: No Wireless Interface After Kernel Upgrade?

Jun 8, 2011

I upgraded from kernel-2.6.38.6-27.fc15.x86_64 to kernel-2.6.38.7-30.fc15.x86_64. After the upgrade I no longer have a wireless interface in Network Management. I have a broadcom BCM4312, booting the previous kernel solves this problem.

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Programming :: Interface "eth0" Which Is Down - Wasn't Displayed But Loopback Interface Has Been Displayed

Jan 6, 2011

The following are the output of command "ifconfig -a":

[Code]....

The interface "eth0", which is down, was not displayed, but loopback interface has been displayed. So, how can I make my application display all interfaces, including the interfaces which are down, but excluding the loopback interface?

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Fedora Networking :: Eth0 Suddenly Stopped Working On FC10

Aug 4, 2009

my eth0 suddenly stopped working on FC10. i have been using it the whole time, and now it refuses to even ping the gateway. dhclient is not receiving a dhcp offer and when i put in the information manually, it is not even able to ping the gateway. netstat -rn shows that the destination of the router is going nowhere.

i do not think it is the hardware/software, but rather maybe the provider? i am from central europe but just moved up to great britain and working at a friends place. i can connect the mac powerbook without a problem (it will get an ip with dhcp), but not the linux machine.it is a normal ethernet modem connection here. can it be, that it checks MAC addresses or even the computer names? the powerbook also has a really weired IP address: 77.102.xxxxx

i am not using network manager, but command line tools and have nm uninstalled. does anyone have a clue, what this could be about? i am not a newbie, but this is really puzzling me.....

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General :: Ethernet Interface Not Found - Eth0

Jul 19, 2011

I booted an OS from a live CD. The OS boots successfully but eth0 fails to start. I checked lspci, it outputs these Ethernet card details:

(Broadcom Netextreme II BCM5716 GBabyte ethernet)

ifconfig -a returns only the loopback interfaces lo and sit0. The output of dmesg | grep -I 'eth' is:

"Netfront : initializing network ethernet driver"

When I run service network restart I get:

"Obtaining IP for lo [FAILED]
WARNING: Deprecated config gile /etc/modprobe.conf , all config files belong into /etc/modprobe.d/
Device eth0 does not seem to be present, delaying initialization [FAILED]"

The output of MII-tool -v is:

No MII interface found.

I was also able to find the kernel module bnx2.ko. I did insmod and lsmod lists it.

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Ubuntu Networking :: 10.10 Server - Wireless Interface Not Working

Feb 18, 2011

Just installed Ubuntu 10.10 server and all working great except the wireless interface. The card is an edimax EW-7711ln. I installed ndiswrapper using the driver rt2860.zip found here [URL]. Then I followed this guide to configure /etc/network/interfaces [URL]. I think the driver is loading fine but I can't connect to the access point. Here is some debugging output...

Code:
peter@Peter-Server~$: route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
Code:
peter@Peter-Server~$: iwconfig .....

So I can scan and see the accesspoint with ssid alleycat but I can't connect. I tried disabling all security to see if it was a problem with my key or some encryption settings but even that didn't work. So frustrating because it seems close to working I must be doing something silly. Incase anyone is wondering why I am running a server off a wireless interface, its just a LAMP development server on my home network.

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Applications :: Using 2 PPPOE Accounts Same ISP Connect Through Same Interface Eth0

Nov 6, 2010

I'm using CENTOS 5.5 and I want to connect to internet using 2 pppoe accounts same ISP and i have a sigle NIC eth0.I used adsl-setup to create pppoe connections, 1 is ppp0 and second is ppp1. When i use /sbin/ifup ppp0 it works, i can use the internet, but when i try to use /sbin/ifup ppp1 while ppp0 is connected, nothing happens, i did ifconfig and there is only ppp0 showing.I'm a BIG NEWBIE of linux, i need to know step by step how to make this work, i heard something about a virtual network... but nothing clear.

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General :: Get Eth0 Interface Doesn't Support Scanning

May 14, 2011

I am trying to connect my fresh new Ubuntu 10.10 to my router. However I am having a bit of difficulty. This is what I have done so far:

Code:

lspci

My devise is a Broadcom Corporation BCM4311 802.11b/g WLAN (rev 02). Then:

Code:

sudo ifconfig eth0 up
sudo iwlist eth0 scan

I get eth0 Interface doesn't support scanning.

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Server :: Heartbeat Not Assigning Virtual IP For Interface Eth0

Jul 19, 2010

I have followed th given site for HA configuration in my virtualbox but heartbeat is not assigning virtual IP for interface eth0 [URL]...

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CentOS 5 :: Using 2 PPPOE Accounts Same ISP Connect Through Same Interface Eth0?

Nov 6, 2010

I'm using CENTOS 5.5 and I want to connect to internet using 2 pppoe accounts same ISP and i have a sigle NIC eth0.I used adsl-setup to create pppoe connections, 1 is ppp0 and second is ppp1. When i use /sbin/ifup ppp0 it works, i can use the internet, but when i try to use /sbin/ifup ppp1 while ppp0 is connected, nothing happens, i did ifconfig and there is only ppp0 showing.I'm a BIG NEWBIE of linux, i need to know step by step how to make this work, i heard something about a virtual network... but nothing clear.

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General :: Missing Eth0 Ethernet Interface In Ubuntu — Can't Connect To Router

Aug 27, 2011

I'm having trouble getting my Ubuntu 10.04 machine (Sony Vaio VGN-SR490) to connect to the Internet by way of an Ethernet cable connected directly to my router.

I'm able to connect to the Internet using this same cable using a Windows machine, so there's something wrong with the way Linux is configured.

How do I got about figuring out what the problem is and solving it?

Here are my network settings on Linux:

$ ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host

[Code].....

It looks like the network adapters list is empty. I will now install both Windows XP and Ubuntu Linux dual-boot. I'm still not able to access the internet, even through Windows. I'm wonder if this could be a hardware problem with the computer or a problem with the router itself. Other computers can connect to this same router, and work fine. (That's how I'm posting this after all!)

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Ubuntu :: Network Manager To Configure Eth0 Interface - File Does Not Carry The Ip

Mar 31, 2011

I used the network manager to configure my eth0 interface.It is working fine. I have found the nameserver entries in /etc/resolv.conf files. But the /etc/network/interfaces file does not carry the ip, netmask, gateway,network and broadcast entries. It only has a entry for the lo interface. where are the settings for eth0 as done by the network manager, stored in case of ubuntu?

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SUSE :: How To Find Out Physical Interface Corresponds To Eth0,eth1?

Jun 21, 2010

I am in need of finding out the physical interface corresponds to eth0,eth1,eth2., As similar like the lscfg command which is available in the AIX operating system. The output given below got it from AIX OS.

$ lscfg -l ent*
ent2 U787B.001.DNWFFC6-P1-T9 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
ent3 U787B.001.DNWFFC6-P1-T10 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
ent0 U787B.001.DNWFFC6-P1-C4-T1 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
ent1 U787B.001.DNWFFC6-P1-C4-T2 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)

Is there any utility/commands available to find out the physical interface ?

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