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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1answer
2k views

How to do mac spoofing on Linux Mint 17?

How to do mac spoofing on Linux Mint 17? Through macchanger -a I've tried to changemy mac address but new mac id doesn't authenticates successfully. pppd gives successful authentication message only ...
3
votes
1answer
5k views

multiple default gateways for alias interfaces (SOLVED)

Alias interfaces defined in /etc/network/interfaces cannot have multiple default gateways. Unfortunately I would like to use the same interface to access 2 different nets, and I need to define 2 ...
3
votes
1answer
2k 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 ...
3
votes
2answers
2k 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 ...
3
votes
1answer
61 views

ICMP - Destination unreachable (Port unreachable)

I have two Ethernet-wired connected devices. I gave to both of them address from same sub-network. As result I can see second device in arp-table of the first. $ arp -a ? (128.247.77.90) at 10:60:4b:...
3
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1answer
54 views

Network Manager does not handle switching between networks by default

I have to transition between different networks quite often using a laptop and various docking stations. If I remove my laptop from a certain network and place it again on the same network then no ...
3
votes
1answer
2k views

Unable to add eth0 in Rhel 7

I am unable to find eth0 in RHEL 7 after just installation. Even I created the eth0 inside the /etc/sysconfig/network-scripts/ directory. After created eth0 inside the network-scripts, I am unable to ...
3
votes
2answers
1k views

change eth0 to eth1 without udev

I have a very interesting issue. We have Redhat 4 Linux and it is has 4 ethernet interfaces: eth0 eth1 eth2 eth3 Now, only eth0 is connected to LAN and everything is working fine. We have special ...
3
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1answer
2k views

usb0 -> what exactly is it for?

So far, I found out that on GNU/Linux /media/usb0 seems to be a mount point for Ethernet over USB. Nice. Question: Where is defined, what usb0 is exactly for? I distilled the above mentioned ...
3
votes
1answer
1k views

Hardware Timestamping using PTP

I'm new to Linux programming. I have an Intel NIC with e1000e driver. I'm working on accurate time stamping of packets being captured from a network. My question is if I want to use RT Linux how ...
3
votes
1answer
324 views

How can I create an alias for a network device?

I'm trying to get a particular piece of software to run that uses a licence manager that hasn't noticed that newer Linux distributions don't name their network devices eth0 anymore. It is trying to ...
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3answers
3k 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 [ "$...
3
votes
2answers
445 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 ) ...
3
votes
0answers
20 views

Bluetooth Tethering, no IPv4 adresse at interface bnep0

I want to tether my mobile internet from my smartphone (OnePlus One, Android) to my Laptop (Debian 8). I want achieve this without using external tools. At the arch wiki page (https://wiki.archlinux....
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votes
0answers
13 views

Limit access/transmit rights on NIC to a single user application

I currently have a RT patched linux machine and I need to have full and undelayed access to my Wired interface card. I am running a realtime non-preemtable user application which sends a couple of ...
3
votes
0answers
314 views

Turn down the Energy Efficient Ethernet (eee) aka Green Ethernet

This is what is the Energy Efficient Ethernet. The problem is, that in lot of environments it conflicts with other features and stuff so i really need to disable it. I read that something can be ...
3
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0answers
160 views

No ethernet device detected

I'm trying to setup Archlinux on VMWare Workstation and for some reason I cannot find my ethernet card. In lspci | grep Ethernet it says Ethernet controller: Intel Corporation 82574L Gigabit Network ...
3
votes
2answers
18k 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 ...
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5answers
10k 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 ...
2
votes
2answers
854 views

RJ-45 <-> RS-232, can I substitute the RS-232 side and abuse my Ethernet port as COM port?

We have a PCIX board (with MIPS CPU) from some vendor and it has an RJ-45 jack on the "board-side", where the cable has an RS-232 plug on the other side. The expected protocol is clearly the same as ...
2
votes
4answers
14k views

How to find IP address of device connected on the same network as PC based on MAC id

A PC and embedded Linux device is connected on the same local network.(We don't have DHCP server access, IT admin has the access). We also don't have access to debug UART on the embedded Linux board. ...
2
votes
3answers
725 views

Can I contect a Ubuntu Linux laptop to a Windows 10 laptop via ethernet cable

I read a lot of articles and watch videos on How people can connect two computers with a ethernet cable but a lot of the instructions was more / windows to windows/mac to mac /windows to mac/ but yet ...
2
votes
1answer
6k 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 ...
2
votes
4answers
100 views

Is there a simpler way to copy a file from a computer to a Raspberry Pi over Ethernet than having to manually set an IP for both computers?

Forgive me if I do not provide all the necessary details, but I will try my best. I downloaded this pdf to help me get started with using my Raspberry Pi. I wanted to copy it over to my Pi, which is ...
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3answers
1k views

Impossible to have two network interfaces wifi and ethernet (as a backup) working together

I have a raspberry 2 with a wifi interface and an ethernet interface. wifi is my main connection with the ability to just plug in the ethernet as a backup method. I want to assign different static ...
2
votes
2answers
898 views

Test connectivity of a Interface

I have a raspberry Pi with three interfaces eth0 (Ethernet), wlan0 (WiFi), and wwan0 (via a GSM modem) How can I test if an Internet connection is available via a certain interface? e.g. is my GSM(...
2
votes
1answer
3k views

How to test an ethernet card?

I have a USB->Ethernet card that may or may not be somehow broken. The problem is I don't really know how to test it. I have a normal Ethernet port as well, so I can hook a (already tested) cable from ...
2
votes
2answers
2k 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 ...
2
votes
3answers
597 views

Trying to get Ethernet working in Linux

I just installed Fedora 22 alongside Windows 10 on my desktop and I've been trying to get the Ethernet to work for a long time. There is no wireless and this is my only source of internet connection ...
2
votes
1answer
658 views

How can I share my internet connection (wireless) with an ethernet only computer?

I have a raspberry pi B+ set up in a server configuration and it connects to internet succesfully over Wifi with a USB dongle. My other pi (an A+) has always been located downstairs in the garage, ...
2
votes
1answer
208 views

Addresses overlaps

I was putting somes static addresses to my interfaces then it shows me this: 172.16.1.0 overlaps with FastEthernet 0/0 What does it mean when two addresses overlaps and how can we avoid it? EDIT: ...
2
votes
1answer
2k views

ifconfig ethernet (eth0) no data flow

Hello this is my ifconfig output: eth0 Link encap:Ethernet HWaddr 50:46:5d:44:5e:fe inet addr:10.0.0.6 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::5246:5dff:...
2
votes
1answer
2k views

Check for plugged in network cable on startup

I actually wanted to post the below as an answer to this question titled: ifup eth0 timeout during boot. But am not sure if this is right approach or it's a way of screwing up things badly. We can ...
2
votes
2answers
2k views

My Atheros Ethernet network drive is not working with Xen Redhat client

First I am a beginner in use Linux operating system, and I am not familiar with the error messages I have TOSHIBA Satellite laptop Intel (R) Core (TM) i5-4200m CPU I have installed Red Hat Enterprise ...
2
votes
2answers
6k views

No ethernet/wireless connection after dist upgrade - “network UNCLAIMED”

I did an upgrade from Xubuntu 12.04 to 12.10, and I can't connect to the internet now. When I press the network button on the panel, I see "No network devices available" on top (greyed out), then "...
2
votes
2answers
11k 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) ...
2
votes
1answer
2k views

How can I get wireless and ethernet to work with ubuntu?

I have an acer aspire 7551 laptop running windows 7 and I've successfully used wubi to also install ubuntu (the latest release version). Wireless works fine on windows 7, but neither wireless nor ...
2
votes
1answer
157 views

Intel Ethernet Connection I219-V not working under Linux on an ASUSPRO B laptop, e1000e driver reports: “The NVM Checksum Is Not Valid”

I have a problem with an ASUSPRO B8430UA laptop: when I boot it with Ubuntu 16.04 (or NixOS 16.03) the Ethernet port does not work. The driver used is e1000e, it reports: $ dmesg | grep e1000e [ ...
2
votes
1answer
316 views

How to set Ethernet link speed & duplex

How can I configure my Ethernet (eth0) link speed and duplex on my systemd & connman based system? I've previously used a script in /etc/network/if-up.d, in which I could make a call like: ...
2
votes
1answer
718 views

Get MAC address of a directly connected device

Given a Linux server with an ethernet card, another device say an unconfigured router is connected with a patch lead (or an ethernet lead cabled in a different way if needed). They're both powered ...
2
votes
1answer
476 views

Does each network packet cause an interrupt to CPU?

While I know that lot of packet processing(CRC calculations, packet segmentation handling, etc) can be offloaded to NIC, then does each packet still cause an interrupt to CPU? Is there a difference if ...
2
votes
1answer
113 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 ...
2
votes
1answer
690 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
1answer
2k 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
842 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 ...
2
votes
1answer
74 views

How do you add a virtual network IP address from the kernel command-line?

I would like to add a virtual IP address, something you normal do with: ifconfig eth0:0 192.168.1.1 (or via /etc/network/interfaces). But, I'd like to do it from the kernel command-line, which has ...
2
votes
1answer
85 views

I have installed CentOS 7 on Virtual Box, but network settings are missing

I have installed CentOS on Virtual Box. I had CentOS-7-x86_64-DVD-1503-01 downloaded it from a torrent. I ran the following command; nmcli d Which tells that only loopback is there. I enabled ...
2
votes
1answer
344 views

set MAC address in “interfaces” file without configuring other network parameters

Under Debian Wheezy permanent network configuration takes place in /etc/network/interfaces file. Is it possible to configure hwaddress for an interface without configuring other network parameters ...
2
votes
1answer
175 views

How does server identify frames in case of multiple VLAN sub-interfaces?

When I create a VLAN sub-interface in Linux, then it gets the same MAC address as its parent interface. For example with ip link add link eth0 name eth0.333 type vlan id 333 command, the eth0.333 gets ...
2
votes
1answer
455 views

Do I have a dead NIC?

OK so this is kind of a long one due to command output. Not necessarily in complexity as I'm only showing some basic t-shooting so any feedback would be appreciated. Basically, I have a fairly new ...