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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3
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3answers
1k views

Why is delay after ifconfig down needed before up if changing MAC address?

Hi I made bash script to put down my interface, change MAC address and get it up again. #!/bin/bash INTERFACE_STATUS=$( cat /sys/class/net/eth0/operstate ) echo "$INTERFACE_STATUS" if [ ...
1
vote
0answers
258 views

wpa_supplicant connection issue: iw dev wlan1 link shows connection, but network unreachable

I've been testing a Wifi card in my machine and I can't seem to get it to connect to my home router. The card is a ralink rt37, I compiled the modules that I needed into the kernel and downloaded a ...
3
votes
1answer
105 views

Linking Ethernet interfaces

I'm quite new to Linux networking. I have a Debian PC with two Ethernet interfaces, one embedded on the motherboard and another on a PCI card. The first one, let say eth0 is connected to my router ...
2
votes
1answer
3k views

How To Diagnose Faulty (onboard) Network Adapter

I'm looking for advice on diagnosing ethernet connectivity issues under Linux. I suspect it's a hardware issue, though I am not entirely sure. It's an nVidia chipset and ethernet adapter. The device ...
0
votes
0answers
724 views

Linux Mint 15 Ethernet Problems

I have a problem with my ethernet connection on my mint 15 (my WiFi works fine). Right after install, it didn't work at all, I followed some solutions I found (including this one) and no luck. I had ...
2
votes
0answers
121 views

Bonds vs. Aggregators

I'm almost to the point where I can post the solution I wound up with for my complex port bonding question. However, in reading the bonding.txt file, I see this option text: ad_select Specifies the ...
1
vote
1answer
279 views

Unable to recognize old interfaces after motherboard update

I updated motherboard on x240 computer node, now the ethernet interfaces show up as eth2 and eth3 previously it was eth0 and eth1. I tried to delete /etc/udev/rules.d/70-persistent-net.rules file but ...
1
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0answers
73 views

No network interface for the lan9118 emulated on QEMU 1.4.0 overo machine

Im using QEMU 1.4.0 Ubuntu 13.04 distribution. Im trying to make the virtrual machine part of the host network so Im ussing this command: sudo qemu-system-arm -M overo -m 1024 -sd ./test.img -clock ...
1
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0answers
150 views

RHEL 5 complex port bonding

The RHEL 5 documentation is good about bonding pairs of ports in various ways. The Oracle team where I work want to get more complex than that. They want an active bonded pair, with a third interface ...
1
vote
3answers
838 views

Using multiple NICs for faster internet?

My laptop have a ethernet card and a wifi card. Ethernet line have maximum download rate at 1.5MiB/sec and wifi is over 1MiB/sec too, but it seem only have one NIC can working at a moment (if I turn ...
1
vote
0answers
51 views

Can we Bring Up eth1 after removing e1000e modules?

I am trying to setup TCP in RTnet. I am not sure whether its possible. I read that RTnet is not supporting TCP. Is that so? So now I am trying to setup rteth0 as server and eth1 as client. To setup ...
1
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0answers
293 views

Bonding configuration on a blade server with Oracle 6.3

I'm trying to configure a mode 6 bonding on a blade server. Blade Enclosure: HP c7000 Blade Server: ProLiant BL460c G1 Redundancy part of the bond is working, I can pull out any one of the cables ...
1
vote
1answer
149 views

Parsing protocol and url from packet payload

We are using pf_ring to capture packets. We are able to decipher information like source and destination ip, mac etc from the header information. Now we are moving into payload to decide the type of ...
1
vote
0answers
151 views

Super slow internet requests

My Internet connection seems to be extremely slow on loading pages, specifically (it appears) when the browser sends the request for the first time. It takes like 5-6 seconds just to send the request ...
5
votes
3answers
585 views

Find out if computer started via Wake-on-LAN or power button?

Is there any (reliable) way to find out if the PC booted because of a Wake-on-LAN Packet instead of pressing the power button? I want automatically check if WOL is correctly configured. I know about ...
2
votes
1answer
73 views

Hardware Ethernet IP Limitation

In Linux Environment How many number of IP address I can assign to a Hardware ethernet interface ? Is there any limitation ? what is the maximum no. of virtual ethernet interface I can assign to a ...
1
vote
0answers
80 views

Identifying MaxSpeed of a Bonded Interface

I have configured Ethernet Bonding for our RHEL 6.2 Servers. Bonding is working fine but few confusion for me when I configured MRTG to monitor the bonded interface. MRTG is showing MaxSpeed of the ...
1
vote
1answer
3k views

Problem compiling a driver : “No rule to make target”

First of all I am running a CentOS 6.4 installation. My computer is a laptop and I am trying to install the drivers for my ethernet card, because this week end I lost my ability to connect to the ...
0
votes
0answers
195 views

Troubles with Wifi and ethernet Aspire One AO725

I'm use Debian wheezy on a Acer Aspire One AO725. It has the following kernels: 3.2.0.4-amd64 3.7-trunk-amd64 The command lscpi | grep Network: 02:00:0 Network controller: Atheros ...
1
vote
3answers
1k views

Virtual Interface Not Showing up in ifconfig?

I am trying to create a virtual interface for the purpose of NameBased Virtual Hosting on my CentOS linux box; please find below is the devices' information:- DEVICE=eth0 BOOTPROTO=dhcp ...
5
votes
3answers
3k views

RHEL: Creating stable names for network interfaces

We have a RHEL 5.5 box with 8 interfaces. And the eth interface naming is flip flopping. Sometimes eth0 comes up on physical port 7th, and sometimes on another physical port. We want the naming to ...
1
vote
1answer
144 views

Setting up network cards on FreeBSD

I just installed FreeBSD 9 on a new laptop and I'm having some trouble getting the network cards to work. Presumably the file representing the cards is in /dev, but where would the configuration files ...
1
vote
2answers
397 views

Creating an Alias to Loopback Interface with an Arbitrary Name

I have an odd problem that seems simple enough but has evaded me thus far. I am attempting to support a legacy application that has a hard-coded ethernet device name ("eth0"). This hard-coding, I am ...
0
votes
1answer
379 views

How do I check if I have packet socket support enabled in my distro's kernel?

How do I check that packet socket support has been compiled into my kernel? I'm running Crunchbang, a Debian-based distribution.
1
vote
0answers
897 views

Unable to install Atheros AR8161 Ethernet controller driver for centOS 6

I've installed CentOS 6.3. However, eth0 does not show up on ifconfig. So I figured out that I need to install alx Ethernet driver from here. Since my internet is not working, as ethernet drivers are ...
1
vote
1answer
111 views

Help understanding interfaces in Backtrack

I am fairly new in UNIX and have recently installed backtrack on a VMWare box on my machine and I am trying to use DHCLIENT command but am having trouble in understanding the interfaces. I am ...
4
votes
2answers
260 views

What happens when I plug a Ethernet cable?

What happens when I plug in a Ethernet cable? I want to be able to see what's happening on the Level 2/3 (I believe the protocols I'm trying to watch is Ethernet, IP (v4 and v6) and DHCP for IP ...
1
vote
0answers
688 views

Why does eth0 only go up sometimes on boot?

I just installed Arch with Archboot. On boot, there's about 50% change of eth0 to go up. If it doesn't I'll have to reboot. What could cause this? If it goes up, dmesg contains: [ 7.9...] IPv6: ...
1
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0answers
347 views

Wlan0 Static Ip bridge

EDIT: Even taking br0 out, still cannot get a static IP connection. I had the following /etc/network/interfaces configuration and it was working auto lo iface lo inet loopback auto eth0 iface etho ...
0
votes
0answers
215 views

Set up network interface for automatic connection

I have an ethernet device P2P connected to the NIC in my system. When the remote device is rebooted or changes its IP address, the local network interface goes down and loses its IP address. How can I ...
3
votes
1answer
827 views

Share Internet Connection from computer to new router

On my linux computer I have an external wlan adapter which is connected wirelessly to internet (an access point). Now I want to connect my linux computer via ethernet cable to a new ddwrt router. This ...
1
vote
0answers
56 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
129 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
344 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
184 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 ...
4
votes
3answers
14k 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
6k 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
vote
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
vote
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
950 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
591 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
vote
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
264 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 ...
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0answers
648 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
450 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 ...