refers to the wired style to connect a bunch computers or a way to connect to such network. This tag is for both software and hardware part of this issue.

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0answers
58 views

Would it be possible to not have the network link cycled on loading the kernel module?

Using some cheap hardware in a thin-client setup we use a diskless PXE booting a small Linux kernel. Currently, it takes a quite some time to boot it fully up and we're looking into some optimizations ...
2
votes
1answer
134 views

directions about customized Layer 2 implementation in linux

I have some machines running on the same network. One node is the control node which distributes traffic coming to it to the other nodes. The thing is that I want to have a custom protocol header ...
2
votes
1answer
370 views

Excessive retransmissions on Ethernet

The CSMA/CA variants of Ethernet handle excessive failed transmissions due to repeated collisions by dropping the current frame and relying on upper layers for retransmissions: After 16 attempts ...
2
votes
3answers
190 views

Connecting Debian webserver to network

I am currently running a webserver with Debian 5.0.2. It has been working (more or less) fine for the past 2-3 years but recently it went down due to some power-outage. Ever since I have brought it ...
8
votes
2answers
2k views

How can I disable TCP/IP for an Ethernet adapter?

I have CentOS 6.3 running in a (virtual) machine with two Ethernet adapters. I have eth0 connected to a TCP/IP LAN and eth1 connected to a DSL modem. The system is intended as a dedicated ...
5
votes
5answers
17k views

CentOS 6.3 Device eth0 does not seem to be present (Minimal non-cloned setup)

I installed CentOS 6.3 on my hardrive partition (new install...minimal install). After successful installation, I see that eth0 was down looked for 70-persistent-net.rules file under /etc/udev .. ...
2
votes
2answers
7k views

Where could I find the ifcfg-eth0 file?

I am using RHEL6, but I could not find the Ethernet interface configuration file ifcfg-eth0 under /etc/sysconfig/network-scripts. Issuing ifconfig -a shows that eth0 does exist. Could it be that the ...
1
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1answer
4k views

What is the difference between virbr# and vnet#?

I am running KVM on RHEL6, and I have created several virtual machines in it. Issuing ifconfig command to the host system command line shows a list of virbr0, virbr1... and vnet0, vnet2... Are they ...
1
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1answer
1k views

Network Interface Names output from ifconfig

So this has been driving me nuts for a good couple of hours, so I thought I'd ask about it here (let me know if there's a better forum for this question). I have a CentOS Virtual Machine on ESXi. I ...
1
vote
1answer
1k views

ifconfig + FAILED from ifconfig on solaris machines

please advice - what the meaning of FAILED word from ifconfig command Dose its mean that network from NIC isn't stable until this moment ? Not clearly if ifconfig read network status each some mili ...
2
votes
2answers
1k views

How can I configure ethernet?

I just started using linux (installed Debian) and the one thing I'm trying to do right now is have my internet working. I connected my ethernet port but still no internet works. I googled for awhile ...
1
vote
1answer
608 views

Reducing ubuntu boot time using dmesg

The boot time is 141 seconds. Here's the most interesting parts of dmesg command: [ 2.870498] usb 1-1.2: new high-speed USB device number 5 using ehci_hcd [ 80.669210] ADDRCONF(NETDEV_UP): eth0: ...
1
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2answers
3k views

Cannot get Realtek r8168 ethernet card up

I've working on Arch Linux and in 99% of time I connect to internet by WLAN but sometimes I need to use ethernet connection, so today I see something strange. My eth0 device is down, and I can't get ...
0
votes
0answers
3k views

ADDRCONF(NETDEV_UP): eth0: link is not ready

my OS (Ubuntu 12.04) started to load slowly. After I choose OS from GRUB, it takes like 50 seconds of loading to get to login screen. I google'd, that command dmesg can provide some useful output. ...
0
votes
1answer
307 views

Network Disabled

I have just installed ubuntu server edition in order to create a home network. But I am not able to find IP of the machine through ifconfig (showing only localhost). Then I tried lspci | grep -i ...
1
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0answers
706 views

Linux Mint: LAN “Cable not connected”, despite it is

I've just installed Linux Mint 13, 64 bit (from the CD of "c't kompakt Linux", if this matters), and came across a very unexpected problem, for which I've not found a solution with Google or searching ...
2
votes
1answer
484 views

Bond slave link up is too slow

On one of my servers I set up a bond-device consisting of an onboard network-card and an PCIe network card. (eth1 and eth5) I set up the configugration according to man ifcfg-bonding - i.e. eth1 and ...
4
votes
1answer
4k views

Using the Wifi of a notebook via ethernet for another PC

I want to connect a PC to the internet via my notebook, which is connected to a WLAN. The setup should look like the following scheme: PC (eth0) -> Notebook (eth0) -> Notebook(wlan0) -> ...
4
votes
2answers
4k views

How do I configure which ethernet connections are active on boot?

I have an unmanaged dedicated server that I administer, running CentOS. Recently when I reboot the server, I am unable to use SSH. Both times this has happened the server host has determined the issue ...
3
votes
2answers
347 views

Network issue in vsat

In my server-client architecture, I multicast 100 MB files to many clients from server via satellite link. Network traversal is through 5 hops. I have the 10Mbps ( i.e. 1250 Kilo Byte per second ) ...
10
votes
2answers
2k views

Solving Ethernet watchdog timer deadlocks

I have a debian linux box (Debian Squeeze) that deadlocks every few hours if I run a python script that sniffs an interface... The stack trace is attached to the bottom of this question. ...
2
votes
1answer
3k views

Display all network interfaces on Solaris

On Linux, the command mii-tool displays the list of Ethernet interfaces and other information. What equivalent command existson Solaris? My goal is to view all LAN networks that my Solaris machine is ...
1
vote
1answer
8k views

wired connection not working under Ubuntu 10.04

(using Ubuntu 10.04 LTS on a netbook prior to any updates) The wireless works fine, the wired connection has been tested using a Windows computer. Choosing auto eth0 from the power manager fails. ...
3
votes
2answers
299 views

Ethernet Sniffing Embeded Device

I recently dug out some prototyping equipment from the trash and I want out figure out what the heck it is. It has a port labelled 'Ethernet' and when I plug it into a router the lights flash like its ...
0
votes
0answers
928 views

Multiple subnets on multiple virtual interfaces with one physical interface

I have a Ubuntu pc with one interface -- eth0 -- which is connected to an unmanaged switch which is linked to two subnets: 192.168.0.0/24 and 192.168.1.0/24. I want to have two virtual interfaces with ...
3
votes
5answers
5k views

Low Cost, 2 Ethernet Ports & Runs Linux [closed]

Looking for an inexpensive embedded device that contains 2 Ethernet Ports, runs Linux (or some other type of Unix), and is under $50. My main concern is cost. It must be under $50 and have 2 Ethernet ...
1
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2answers
7k views

Configure a bridged Ethernet adapter in a VirtualBox guest running Scientific Linux

I installed Scientific Linux 6.2 x86 in VirtualBox on Windows 7 x64. The adapter is Adapter 1: Paravirtualized Network (Bridged adapter, Marvell Yukon 88E8056 PCI-E Gigabit Ethernet Controller) ...
1
vote
0answers
324 views

Configuring multiple static IP addresses for a disk image

Using Ubuntu 10.04 I'm using Clonezilla to create and install a customized image. I'd like to be able to set up multiple static IP addresses. For example, I'd like the first interface to have the IP ...
3
votes
2answers
697 views

Wait for ethernet cable plug-in/plug-out event under Linux?

I know that I can poll the link state via the SIOCETHTOOL/ETHTOOL_GLINK ioctl but this would require to endlessly request the state. The same goes for parsing /var/log/messages. So my questin is, is ...
2
votes
1answer
644 views

Fedora 15: em1 recently dissapeared and hostapd no longer serves internet to wirelessly connected devices

I have a laptop running hostapd, phpd, and mysql. This laptop uses an Ethernet connection to connect to the internet and acts as a wireless access point for my workplace's wifi devices. After ...
1
vote
1answer
550 views

routing between two private networks (NICs)

I have two private networks say: 10.0.1.0/8 and 192.168.0.0/24 I have two machines with two NICs per each machine. machine1 NIC1: 192.168.0.10 machine1 NIC2: 10.0.1.10 machine2 NIC1: 192.168.0.11 ...
1
vote
1answer
431 views

Upgrading to linux kernel 3.0.1 but my ethernet card is still not found?

Please forgive my ignorance, as I am still fairly new when it comes to linux under the hood! Anyways - following up on my previous semi-related post, instead of trying a Debian testing image, I ...
5
votes
2answers
5k views

changing the names of network interfaces, debian wheezy

I'm trying to set a name for an interface, "ethLan" instead of eth0. Doing so also ensures that the if's name will remain consistent at every reboot and kernel. I did find some articles in the ...
4
votes
1answer
493 views

What's the difference between the drivers r8169 and r8168?

Realtek provides the source code for the r8168 driver which is based on the r8169 driver from the kernel tree if I may believe their source: /* * This driver is modified from r8169.c in Linux kernel ...
4
votes
2answers
11k views

Check whether network cable is plugged in without bringing interface up

I am trying to identify NICs on ~20 remote servers (2-6 NICs on every server). To begin with, I want to identify those ready for use and free ones. How can I check the state of the physical media? I ...
2
votes
1answer
609 views

How can I update the OUI list used for Netdiscover?

Netdiscover keeps showing a lot of "Unknown vendor" devices, when I generally can find the vendor pretty quickly via Google. Is there any way to manually update whatever OUI list Netdiscover uses?
2
votes
1answer
614 views

Is vnstat reporting accurate?

I'm checking the stats of a busy site that host mirror downloads. I installed vnstat on the machine and after a few days i saw the number 125.25 Mbit/s or using -ru 0 15.29 MiB/s I'm extremely ...
3
votes
2answers
783 views

How do I check the network speed right now?

I know about vnstat and that tracks over the hour/day/months. I would like to see the network speed right now. As in for a duration of a second or at most a minute. Kind of like how top can show me ...
4
votes
2answers
2k views

Replacing identical NIC cards creates eth1 instead of using eth0 in Ubuntu

I changed out a NIC card that was the exact same make and model. The setup process for Ubuntu 11.04 was very seemless and easy so I figured it would be smart enough to setup up the replacement card. ...
2
votes
1answer
976 views

Atheros ar8151 driver for kernel 3.x (fedora 16)

Yesterday, I installed Fedora 16 and found no wireless connection available. Then I found the ar81family driver But it seems like it does not work with kernel 3. I changed the makefile to ignore ...
6
votes
2answers
523 views

How can I test the current carrier state for an ethernet adapter in Linux?

In Arch Linux, how can I check if a network device (say eth0) has a carrier signal present?
9
votes
1answer
1k views

what level of the network stack does tcpdump get its info from?

As I was trying in vain to fix a faulty ethernet controller here, one thing I tried was running tcpdump on the machine. I found it interesting that tcpdump was able to detect that some of the ICMP ...
1
vote
0answers
254 views

SMSC Ethernet PHY problems - blinking ~11.68Hz LED when it isn't working

I've got a custom ARM Linux 2.6.35-based platform I'm trying to get working. My problem is the Ethernet is not working consistently. I've got a SMSC LAN8720AI PHY, with a i.MX283 uP/MAC @ 454MHz. ...
3
votes
1answer
2k views

eth0 is proxy-arping, but /proc/sys/net/ipv4/conf/eth0/proxy_arp is 0

I'm scratching my head about this question... I have a debian squeeze machine that is connected to an internal lab network. We have a lot of machines that have default proxy-arp configurations on ...
1
vote
1answer
1k views

Why do I only get 100mbit on my Asus GigaX1005?

My GbNIC (Intel 82579LM, kernel 3.0 module e1000e) only connects with 100mbit although it's connected to a 1000mbit port (Asus GigaX1005) via an short (<3m) CAT6 cable. flo-nbook ~ # ethtool eth0 ...
1
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2answers
917 views

Atheros ethernet driver

I have openSUSE 11.4 installed on my HP pavilion dm4-2015dx. The ethernet card (Attansic ethernet controler is shown in Yast's hardware info) was not recognized and after many days of googleing i ...
2
votes
1answer
1k views

Cannot connect to printer hosted on a Belkin print server

I tried to tap into Belkin Home Base (model #F5L049au) print server. I want to access a printer hosted by it. I set it up as a CUPs printer with the below specifications: Description: Via Belkin ...
-2
votes
1answer
256 views

How Can I “CAM attack” a switch/router?

Does someone has any script that can "CAM attack" a switch/router, so that it will act as a HUB? Are there any tools for it in the repositories?
1
vote
1answer
535 views

Network fail on FreeBSD: Ping to router fails, but router believes computer is connected

I have a TP-Link TL-WN851N wireless adapter, which is based on an Atheros device. When I attempt to connect to my WPA2 wireless network, ifconfig wlan0 tells me that the connection is 'associated'. My ...
1
vote
1answer
2k views

Debian Live - modprobe failed to bring up Broadcom ethernet interfaces

I have a Dell 710 with Quad Bcom NetExtreme 5709s. In the name of expediency, I'm trying to boot off the Squeeze live CD, but the Broadcom drivers are in non-free, so they don't come up when you ...