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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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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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 :: 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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Ubuntu Servers :: 10.10 - Setup Eth0 With Subdevice Eth0.0 And Eth0.99 To Come Up At Boot

Apr 22, 2011

im trying to setup eth0 with subdevice eth0.0 and eth0.99 to come up at boot

eth0 is dhcp clint
eth0:0 is static ip
eth0.99 is 802.1q vlan interface
/etc/network/interfaces
Code:
auto lo
[Code]....

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Networking :: Eth0 Fixed IP - Eth1 DHCP Gateway - Access To Eth0?

Aug 19, 2009

5.10 Breezy configured as machine controller. Works great eth0 is a fixed IP to communicate with controller comms board. Not easy at all to alter - the comms board is hard coded to listen on eth0 for commands.

I can use eth1 as the default gateway and ping google.com, etc. But when I now attempt to communicate with the controller with netcat, e.g.

Code: echo !HH | nc 192.168.1.6 80

I obviously never get an answer since the request is passed via eth1. Using the -g option with netcat doesn't work either. I had a look at iptables but it doesn't seem to be able to do what I want. How I can still use eth0 as my communication port to the controller whilst eth1 is the default gateway?

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Networking :: Production Server With Static IPs On Eth0 And Eth0:1 - Getting Private LAN On Eth1?

Jul 1, 2010

I have two servers on a vlan at my datacentre/colocation and previously both servers had public IPs on their eth0 interfaces. The servers are HP ProLiant DL360s - one is a G4 and one is a G5 The newer G5 is now the LAMP server and the G4 has been retired and I want to repurpose it as an iSCSI target using openfiler freenas or similar.

My G5 has public/static IPs lashed to the eth0 physical interface and the eth1 is not configured to do anything yet. The G4 will have both interfaces available - perhaps one for ssh access from one of my static public IPs and the other to be a private IP on the local vlan. Here is what I am trying to get my head around...

The G5
eth0 - Public IP - full LAMP services on two or three virtual interfaces
eth1 - Private IP 192.168.0.1
The G4
eth0 - Public IP for ssh
eth1 - Private IP 192.168.0.2

Because my traffic between eth1 on these boxes is via private IPs on the local private vlan it doesn't add to my quota for bandwidth. How do I go about configuring the routing and gateways and other aspects of this so that I can run a private IP space network between the eth1s and still serve the outside world from the eth0s...

I am afraid that if I assign the private IPs to the eth1 interfaces the routing may either not work or interfere with the access to the production internet facing interfaces (eth0s).

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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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Networking :: Unknown Host - Placing Eth0 In Dhcp Through The GUI And Bash But Always Get A 169 Address Or 127

Jan 22, 2010

I'm having an issue configuring eth0. I'm using ubuntu 8.10 in a virtual machine (VirtualBox). The correct adapter is being used and it has worked in the past. I've tried placing eth0 in dhcp through the GUI and bash, but always get a 169 address or 127.

When I run the following command:

Code:

The output is:

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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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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Ubuntu Networking :: Ignoring Unknown Interface Wlan0=wlan0?

Jun 6, 2010

Also having this problem on Ubuntu 10.04.If I do "iwlist scan" I can pick up networks on wlan0:

Code:
lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.

[code]....

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Jul 30, 2010

I try to generate a server client code. What i try to do is sending video streams from eth0 and eth1 to the other server programs' eth0 and eth1. In order to do that, i decided to use SO_BINDTODEVICE. But the code is not working. Am i misunderstood the usage of SO_BINDTODEVICE.

1-Defining two ports
2-Defining two sockets
3-Assigning host ips on them

[code]....

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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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General :: Force Server To Open Connections Via Eth0:0 Not Eth0?

Mar 3, 2010

I got two IP's in my dedicated server. Both are external IP's. I would like to make connections using 2nd IP address under eth0:0 interface. For example: when using "lynx whatismyip.com" should display my 2nd IP. How to do this using iptables ?

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Jul 13, 2009

On my machine (Desktop PC) I have 2 network card : wireless (rt61 802.11) and a wired card (BCM44). When I install debian 5.

The wired card is detected and logical name eth0 is assigned, while wireless is not assigned I install firmeware* software to configure the card. It is done in some way ( I used mnetwork from mepis, it works fine).

Now the problem: eth0 disapears, and no eth0 inteface found? ifconfig gives just wlan0.

Question: Why there is no eth0, it was before configuration of wlan0 ?

How to active again eth0, or ho to create the logical eth0?

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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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General :: Getting Eth0 To Come Up - Eth0 Seems To Have Vanished From Computer

Mar 2, 2011

I'm not sure how long ago this happened but eth0 seems to have vanished from my computer. wlan0 works fine and when I plug into the switch there is carrier detect.

Code:
21:35:43 ~:$ ifconfig eth0 up eth0: ERROR while getting interface flags: No such device
21:55:49 ~:$ lspci 05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05) 07:00.0 Network controller: Intel Corporation Ultimate N WiFi Link 5300 After that i have no idea where to search for problems next, any ideas would be greatly appriciated (can't spell) ubuntu 10.10

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Sep 27, 2010

I have a hardware device with two ethernet ports, eth0 and eth1 running Centos 5. Basically my goal is to forward packets from eth0->eth1 and eth1->eth0 as well as get a copy of these packets for analysis. If I set IP routing to do the forwarding then I won't get a copy of the packets for analysis.

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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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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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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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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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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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I have set 'ONBOOT=no' in interface script '/etc/sysconfig/network-scripts/ifcfg-eth0:2' but my interface bring up at boot time, what is the problem , I have checked it 3 or 4 diff os/machine but the same issue. Can anyone please help me to disable virtual IP's at boot time that network script make it up every boot time.

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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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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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I have 2 network cards eth0 and eth1, for eth0 i set a manual MACADDR in network scripts. Ok so every time i boot, if the cable is plugged in, my eth0 fails to mount or i don't know.. i get this after bood when i type ifoncifg eth0 (eth0: error fetching interface information:Device not found). So i have to unplug the cable when i boot, then plug it in and do a service network restart.

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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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I've looked today on my logs /var/log/message and I find device eth0 entered promiscuous mode I don't remember putting eth0 in promiscuous mode I'm connected to the net thru a router how do i turn that off ?

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