Ubuntu Networking :: Cannot Get ETH0 To Appear In Ifconfig Via CAT5 Cable
Nov 7, 2010
I'm trying to get my Ubunutu and OSX systems to connected via a cat5 cable to transfer some large files around very quickly. Now i know normally this would require a crossover cable as it's a direct connection but the macbook/OSX can handle changing the wires round to make it work like a crossover cable as I've done it before. However the macbook creates a self-assigned IP or as I've tried I've set it to :
IP:10.10.0.1
Subnet: 255.255.255.0
Then I've setup the Ubuntu system both through the System>Admin>Network panel as:
IP:10.10.0.2
Subnet: 255.255.255.0
and my /etc/network/interfaces file is the same;
#lines added to get static crossover cable working
auto lo
iface eth0 inet static
address 10.10.0.2
netmask 255.255.255.0
Yet when I run ifconfig in the terminal eth0 isn't present
Code:
htpc:~$ ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:912 errors:0 dropped:0 overruns:0 frame:0
TX packets:912 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:371613 (371.6 KB) TX bytes:371613 (371.6 KB)
ra0 Link encap:Ethernet HWaddr 70:f1:a1:e6:b1:97
inet addr:192.168.0.42 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::72f1:a1ff:fee6:b197/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:120744 errors:1 dropped:0 overruns:0 frame:0
TX packets:87499 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:171716865 (171.7 MB) TX bytes:7815802 (7.8 MB)
Interrupt:19
htpc:~$ ifconfig eth0
eth0 Link encap:Ethernet HWaddr 90:fb:a6:e4:c0:b0
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:23 Base address:0xe000
Also even when I try and ping 10.10.0.2 either from my OS X or the actually Ubunutu machine all I get is:
Code:
ping 10.10.0.1
PING 10.10.0.1 (10.10.0.1): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
Yet the Ubunutu machine is also connected to Wifi and when I ping it's own address I get the expected response. To me it just seems like eth0 isn't being recognised somwhere or it's not turned on yet I can't seem to find any toggles or settings for it anywhere. Further more if I check >System>Admin>Network Tools the IP for eth0 is 0.0.0.0. What could be going wrong and why no IP set correctly?
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Mar 6, 2011
Im a long time Ubuntu user (since 5.04), but networks were never my speciality, I have a desktop running 10.10, connected to the internet trough a US robotics modem (connection eth1), and i want to share its network with my laptop running win7, over a cat5 cable (connection eth0), but the problem is I dont seem to understand what i am doing wrong, what the missing steps required, or in which end is the problem (either ubuntu or windows side).
From what I could grasp was needed googling about the subject, i already set the eth0 connection to share with other computers (in network manager edit connections auto eth0 ipv4 configuration set to share with other computers). Also using the cli set eth0 for static ip using :
Code:
sudo ifconfig eth0 192.168.0.1 Now the question is what i am missing? or is everything needed already done and i just have to properly configure the win7 side (which i already checked several times)?
Here is my ifconfig output:
Code:
eth0 Link encap:Ethernet Endereo de HW 00:01:29:a6:55:fe
inet end.: 10.42.43.1 Bcast:10.42.43.255 Masc:255.255.255.0
endereo inet6: fe80::201:29ff:fea6:55fe/64 Escopo:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Mtrica:1
[Code]...
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Aug 6, 2011
I am working with ubuntu and my eth0 connection was up and working fine untill some days back when all of a sudden it seemed to disapper. I was able to access the net through it before. But now it has vanished and i donno when. i tried ifconfig eth0 up but no use. The result of cat /etc/network/interfaces is as follows
auto lo
iface lo inet loopback
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Jun 13, 2010
I am trying to setup a networked hP C6280 all in one device attached to my network via Cat5 cable. It has the IP 192.168.0.105 and I am experiencing problems with setting up HPLIP... I know I am not the only one to have this problem, but I cant find specific info for slackware and all the posts I've found on the web are outdated, often refering to slack 9 or having been posted prior to 2006....
I use Slackware -Current (prior to 13.1 release), CUPS V1.4.3 and HPLIP V3.10.2. When I try to setup my device in HPLIP (hp-setup), I select "network/ethernet/wireless device", then HPLIP discovers my printer @ 192.168.0.105 (like I expect), and then I click "add printer" and I get:
Code:
Printer queue setup failed. Please restart CUPS and try again. And then the setup exits. Of course restarting CUPS will not I reinstalled HPLIP and no luck. I can setup the device in CUPS, but if I proceed this way, I will not be able to select the attached scanner as a resource in XSANE.In other words, if I setup the all-in-one device with CUPS, it is considered only a simple printer..I remember that I had the same problem with Slackware 12.2 about 14 months ago, but cannot remember how I fixed it.
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Apr 26, 2010
I've got a vmware install of Fedora 12 running as a server. This install has the /etc/sysconfig/network-scripts/ifcfg-eth0 file configured with the proper info and the service has been restarted. When I run ifconfig I only get the loopback interface, when I run ifconfig -a I can get the eth0, but without the pre-configured ip address. When I enter ifconfig eth0 up I can activate the interface, but without the afore mentioned ip address. I need to be able to yum ssh, install it, and run it with rsa keys. Can do none of this without an interface obviously.
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Mar 10, 2010
I need to have the configuration showed on the attached file. I have two machines, one PC (ubuntu 9.10 ) and one embedded CPU with a tailored linux version starting from 2.4.31 linux kernel with Busybox running on PPC architecture.
PC address is 192.168.30.70.
On CPU board I have two ethernet interfaces with addresses :
eth0 192.168.30.30 netmask 255.255.255.0
eth1 192.168.30.40 netmask 255.255.255.0
PC sends messages alternatively to 192.168.30.40 and to 192.168.30.30 .Between two machines there is an ethernet switch to allow messages flowing.
I use ping (from two shells on PC I ping the two addresses on CPU) to simulate messages from PC to CPU and I see this behaviour:
Starting from a situation in which CPU responds to the pings I try to disconnect cable connected to eth0 on CPU. I cannot see any interruption on ping reply on the eth0 port. If i reconnect the cable on eth0 and I disconnect cable on eth1 there are no reply to the two pings (neither from eth0 nor from eth1). It seems that all data flows on one cable just because the addresses are on the same subnet. Is this right?
If this is the right behaviour how can i separate data from PC to CPU in order to force packets to flow on two cables and avoid this sort of internal routing beetween eth0 and eth1?
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Jun 10, 2010
explain the difference between these two commands. I'm currently reading about changing your mac address and both of these commands show up a lot. They sound like the same thing to me. Is one better than the other, or do you need to use both to change your mac address?
Code:
sudo ifconfig eth0 down
sudo /etc/init.d/networking stop
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Jan 2, 2010
What does it mean when i get a eth0:avahi ? on ifconfig
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Mar 3, 2011
I have a problem with the network. Worth two network cards and Ian wan. Do not take the ip. When the system boots not included until you do the command ifconfig eth0 up. The network card is connected to a router, he does not see it. Router working, tested. Network card is working well, tested on Windows. RX RT packages go, withheld support for ipv6 and packages no longer go.
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Jan 21, 2010
I've installed Centos 5.4 _AMD64 on my PC, everything is ok except I can't connect to internet. I can see my hardware in the network manager I also have eth0 and wlan0 but I can't activate them. for eth0 an error of " No cable present" and wlan0 something about the ip I don't have a cable and I used to connect through wireless My wireless is PCI Ralink and I had the same situation with Debian and I think I needed to download extra packages to get it working. I am writing from windows vista now ,So please could you provide me with the packages and steps to get wireless working through offline process because I don't have a cable.
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Jul 20, 2010
just install opensuse today, but my system can not found eth0, ifconfig ,just have not eh0 infomation,only got lo infomation,
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Jun 1, 2011
I have been noticing a trend on boxes running 11.4 getting RX dropped packets where prior to 11.4 they did not get them. Basically every box running 11.4 now logs dropped RX packets. Have tried changing cables, and in one case replaced the NIC with a different brand (and driver) nic. Also played with receive buffers and yet the counters still increment. In addition to OpenSUSE, I run several operating systems to include Centos, Scientific Linux, Debian, OpenIndiana, HP-UX, VMS and so forth. So far this anomaly has only shown up on machines running OpenSUSE 11.4. Any one else noticing this on your OS 11.4 machines? If so, were you able to resolve?
[code]....
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Feb 28, 2011
The computer and system in question is the laptop from my description and openSUSE 11.3 with a different kernel from this repository :[URL]..free to move this thread if it should reside in the beta/prerelease forums section. The IMHO relevant information about my hardware and system is shown below.
The kernel I'm using :
Code:
grzes@opensuse:~> Linux opensuse.local 2.6.37.2-1-desktop #1 SMP PREEMPT 2011-02-25 19:59:41 +0100 i686 i686 i386 GNU/Linux
The hardware and drivers I'm using :
Code:
02:00.0 Network controller [0280]: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
[Code]...
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Sep 22, 2011
On my system (OpenSUSE 11.4 - kernel 2.6.37) ifconfig indicates different interrupt number for eth0 than proc aqd sys file system.
ifconfig indicates 17:
proc fs indicates 43:
sys fs indicates 43:
Relevant part of lspci -vv output for irq 17 (this belongs to wlan0 and not to eth0):
Relevant part of lspci -vv output for irq 43:
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Jan 13, 2010
i know this is crazy, but im using a [URL] and have loaded a copy of "red hat linux 7" on the computer. i have no idea what kind of hardware config/spec stuff i should have in my immediate vision, and if i did i'm not sure how i would make sense of it all. linux loaded fine. didnt save drivers. eth0 not showing in ifconfig report, but lo is connecting to network, other host cannot ping linux and vice versus
can mount a cdrom, but not a usb flash dont quite understand how the load methods work involving /mnt/cdrom/"usbutils-0.86tar.gz" eth0 problems and gnome rpm stupidity keeps me from upgrading sys from old version to a newer version, cant even find the cmd to show me that info, sorry. have usb files i want to mount, dont know how to loAD THE CDROM FOLES, SO EVEN THAT ISNT WORKING OUT HAVE DISCS WITH howtos just need to stay focused on steps to get desired end result, while trying to learn too much info for what im currently doing between all the f!@#@ing windows i have open.
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Feb 15, 2011
got a watchguard firebox 1000 here, old tech i know, the manuals/pdfs on their site want me to use a crossover cable for the quick setup and I havent got any at the moment, but I got dozens of normal patch cables and switches. Can I use 2 patch cables on a switch to simulate a crossover cable scenario? If so ... would there be anything extra to do to make that method work? --tia
this thread indicates there is no difference other than what they mention in the thread? confirmation on that? [URL]
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Mar 2, 2010
i have a problem. I cant find anything except my mac address if i type "ifconfig eth0" in terminal.There is no gateway adress ip adress and netmask. This is wierd. How can i asssign those to a eth0?
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Apr 9, 2009
I have 2 PC ( one have Fedora 8 and other have fedora 10 )
I want to connect them directly through CAT5 cable and want to transfer files from one two another (without internet) ...
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Mar 2, 2010
I am trying to install OpenSuSE 11.2 via network.It is my pxelinux.cfg/default file
default ubuntu
prompt 1
timeout 30
# Install i386 11.2 Suse
[code]....
A network client computer gets ip address from dhcp server, loads initrd and failed on Loading Istallation System stage 4 or 5. If I try to continue installation in manual mode I get an error net_activate: ifconfig eth0 up failed I tryed network cards from different vendors it did not help. Ubuntu linux installs successfully in current environment.
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Apr 7, 2010
Can Cat5e RJ45 connector crimper be used for Cat 6 connector because I heard cat 6 connector is different from cat 5e connector and also same question for cable tester can cat5e cable tester be used for cat 6 cable?
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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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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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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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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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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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Sep 9, 2010
I have a two node, source/destination laboratory that I've built for testing at my place of employment. I have 4 servers on each side for different protocol testing: two Windows and two Linux, all daisy-chained through a CAT5 KVM switch. I obviously have network routers/switches in place as well, but that's irrelevant for this issue:I am connecting the servers to the CAT5 KVM with CAT5 to DB-9 & USB Dongles. The DB-9 is the VGA and the USB is for mouse/keyboard support through the KVM. What I've found is that all of the Windows servers recognize the USB connection for keyboard/mouse (this connection also must be in place for the KVM to discover the server), and 1 Linux Server recognizes the USB connection. The other 3 Linux servers do not recognize the USB keyboard/mouse support portion of the dongle, and subsequently the KVM cannot discover them.
The server hardware should be identical on all servers, and I've set the BIOS/CMOS in all servers to mirror each other. Additionally, if I plug the USB portion of the dongle into one of the Windows servers and the VGA into the problematic Linux server, the KVM recognizes it (I can see it, but I obviously can't type or use the mouse). So I am confident beyond a reasonable doubt that this is an issue with USB Keyboard/Mouse support somewhere in my install of Ubuntu 9.04 Jaunty Jackalope on 3/4 of these.It must be possible, however, because 1 of them works. I've checked portions of the working Linux Server to compare them against each other, and I can't find anything that really stands out or explains why it works and the rest don't. Hell, the working one doesn't even have any drivers installed on it.The easy fix is to purchase a PS/2 Dongle. I've already verified it can support it via PS/2, but I don't want to just band-aid the issue unless there is no other solution.
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Oct 12, 2010
how I could file share, or make the whole Hard Drive (HDD) accessible to another computer. The two other computers I have are a Toshiba Laptop with Ethernet and USB, and a iMac Intel with Firewire, USB, and Ethernet. Putting these to use along with:
Three Ethernet Cables
Two Printer Peripheral USB Cables
The Two Computers
A 2GB Flash Drive
That is all I can think of right now. I do not want to use CDs. In a way, I would like to do a network boot. So, how do I get the whole HDD visible to the others computers (either/both) and be able to write to it? I want to put Xubuntu on it, and earse the rest of the Hard Drive. The computers getting this are the iMac G3s and the eMac G4. The eMac has 256MB RAM, 40GB HDD, and a 700MHz processor. Two iMacs have 128MB RAM, 40GB HDD, and a 600MHz Processor. The other iMac is the same as the rest but has a 500MHz processor.
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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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Jan 7, 2010
i am using ubuntu server and when i run ifconfig i do not see my second nic
i'm running a supermicro 5015 dual core atom 330 server
ubuntu server 9.1
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Mar 29, 2010
To get internet access on my second computer I have to follow the manual routine detailed below:
sudo ifconfig eth0 down
sudo ifconfig eth0 hw ether ..........
sudo ifconfig eth0 up
sudo ifconfig eth0 ....... netmask ........ broadcast ........
sudo route add default gw .........
where the various ........ represent the relevant addresses. This is necessary because my ISP only recognizes one computer - my first one. The above works fine, I simply copy and paste the above from a text document, but I would like to know which files I can alter/create so that all the above is achieved automatically when I boot my second computer.
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