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Questions tagged [ethernet]

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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Linux Mint cannot connect via ethernet

I just installed Linux Mint 19 on my machine, the installation so far went fine, but now I can't connect to the internet, infact I cannot even connect to my router on 192.168.1.1. And looking at the ...
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route table with eth0 priority and ppp0 second

i have a board with linux-3.20 and it have 4G modules. when i startup i can run "pppd call quectel-ppp &" get a ppp0 interface.i also have eth0/eth1 interface,eth0 can connect to the Internet,now ...
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16 views

USB-Ethernet adapter stops working periodically, as if going to sleep

My laptop uses a USB-Ethernet adapter for a wired connection. Periodically, while actively working, the connection is lost. NetworkManager tries to connect and to obtain an IP address via DHCP but ...
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0answers
29 views

Avoid bringing down ethernet iface when cable is unplugged

I have a device connected to my computer via Ethernet cable (I am actually using a USB to Ethernet adapter), and sometimes I have tu turn this device on and off . The interfaces file for the Ethernet ...
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27 views

Not able to configure eth0 on boot up

linux 4.9.11 android O I have a nxp imx6 sabresd reference board. I do not get my eth0 up after doing this ifconfig eth0 192.168.7.5 netmask 255.255.255.0 up the log I get after this is, adev_6dq:/...
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28 views

Network interface not up

Ethernet interface shows down. Tried to make it up with the below command, but still it shows down. root@DLC-200:~# cat /sys/class/net/eth2/operstate down root@DLC-200:~# ifconfig eth2 up root@DLC-...
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37 views

Install Ubuntu 14.04 but no LAN internet

I am new to Linux. I have been trying to install Ubuntu 14.04 on Dell 7050. It works fine but I have no internet (no Ethernet). After searching it seems I have to install the network driver manually, ...
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1answer
22 views

How to regenerate a complete config file from a kernel Image from buildroot

I have an Image that I generated using buildroot that boots a kernel from an SD card and it works perfectly. I changed a few settings in the buildroot menus (I can't remember which ones) and now ...
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1answer
52 views

Disable Power from Ethernet

I'm trying to "turn off" the power that goes to a device over Ethernet. I'm using this card: https://www.startech.com/Networking-IO/Adapter-Cards/4-port-gigabit-poe-pcie-network-card~ST4000PEXPSE; it ...
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1answer
106 views

dhcpd and bridge - No subnet declaration error

I prepared dhcpd configuration in Debian 8 and it successfully worked but then I added bridge and dhcpd failed. bridge: root@remote:/home/s# brctl show bridge name bridge id STP enabled ...
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0answers
19 views

Ethernet malfunction when booting with extra device on /dev

I have a customized Linux distro (created via buildroot) running on an embedded platform. The system consists in a processing module (Based on Samsung Exynos 4412 microprocessor) with a base board for ...
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49 views

Networking service makes eth0 to get down when restarting it in Debian 9 Strech

When you connect to a server via SSH, and server has a fixed IP address through /etc/network/interfaces file, if you try to change the IP address in that file, normally you would restart the ...
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0answers
58 views

The mysterious case of the slow ethernet connection on a Debian router

I have adapted an Intel NUC to act as my home router. It handles a VLAN on the LAN for the wifi clients and some ethernet clients, the local LAN, an OpenVPN server, the WAN connection. The strange ...
2
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1answer
177 views

Ethernet Connected but no internet access on Linux Mint

I new in connecting Ethernet with my Linux Mint, WiFi works fine. But I encountered quite a few errors. After spending 2 days searching I failed to connect. $ uname -a Linux 'username' 4.13.0-39-...
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2answers
146 views

Transparent Bridge from Existing WiFi to Ethernet?

I've seen lots of examples that turn the bridging machine into another router with its own DHCP server, etc. But I want to use a wired device as if it were connected directly to the original router. ...
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0answers
33 views

How can I create ethernet bridge in Linux system in Buildroot?

I have 2 (and will have additional 2) ethernet interfaces in my device, and I want them to be bridged. I use Buildroot for building my system. I want to create bridge at startup. Currently I use this /...
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34 views

My ethernet device has strange name on Ubuntu [duplicate]

My ethernet device has strange name on Ubuntu, is this normal? $ uname -a Linux calculon 4.4.0-93-generic #116-Ubuntu SMP Fri Aug 11 21:17:51 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux $ ifconfig ...
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1answer
65 views

network statistics of each queue in a multiqueue system

I have an NIC with multiqueue support so that based on priority of packets different queues will be used. I want to analyze the packet flow through each of these hardware queue. The queues are ...
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1answer
53 views

Beaglebone cannot connect to internet using ethernet cable

I've been trying to get my Beaglebone Black to connect to internet using an ethernet cable plugged direct into my Netgear router. I have tried many things but nothing has worked so far. Here are some ...
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29 views

Conflict between wlan and ethernet board

I'm using a linux based board to receive data from sensors and write them in a txt file.By configuring the board as webserver i'll reading the txt file by typing ip address. The protocol used is ...
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2answers
150 views

How to identify the switch port an interface is connected to?

Is there a way to send some (non-broadcast) packets out on an Ethernet interface that doesn't have an IP address assigned to it? Thus allowing me to see which light blinks on the network switch? The ...
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0answers
38 views

Mapping between FDIR to RSS queues for Intel 82599ES

I am working with Intel 82599ES 10-Gigabit SFI/SFP+ NIC with linux 4.4.0-116-generic native ixgbe driver. I am wondering about flow indirection table coming with NIC which has 16 fdir queues. Those ...
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2answers
29 views

How know in which router I'm when I'm connect by ethernet

When I'm connected by WLAN I can determinate in which network I'm by looking the SSID, for example: $ iwgetid -r ONOA72E $ nmcli -t -f active,ssid dev wifi | egrep '^yes' | cut -d: -f2 ONOA72E And I ...
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1answer
32 views

How to get the information about the status of data receiving and sending in ethernet?

Is there any tools to get the information about status of data receiving and sending in Ethernet (Real-time information is better, GUI tools is better)? The information includes: sending and ...
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0answers
30 views

Cubietruck not receiving DHCP address from server

I have a Cubietruck board with 16.04 Ubuntu (armbian base) installed. In the past I've used the board with a static IP address, defined in /etc/network/interfaces. Today I wanted to expand my ...
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0answers
26 views

Arch netctl profile configuration

I'm new to Arch and I'm trying to set up my Raspberry Pi with Arch-ARM to connect to my uni's network. I think I've figured out what I need to do – I've currently got a netctl profile up in nano, with ...
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27 views

mtu 9000 issues only on tcp and not icmp possible?

I have a connection between two datacenters and rsync between them stalls often. I think it is related to the mtu 9000 (I actualy set it to 8900 because of some possible vlan use) I have the ...
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1answer
42 views

What is the simplest way to connect hosts on the same subnet? [closed]

I would like to achieve that what ever hosts (that are on the same subnet) I connect on ethx on tunx, could see (ping, have ip connection) the other ones located on the the other ethx or tunx (on the ...
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1answer
63 views

How can I share my laptop WiFi with my Raspberry Pi via ethernet? [closed]

I have a Raspberry Pi 3 and I am trying to get WiFi working on it. I cannot seem to get the wireless to work in the command line so I would like to use my laptops WiFi instead. Both devices have an ...
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0answers
292 views

ubuntu 16.04 unable to connect to the internet through ethernet

My laptop( Lenovo G-50-80 ) was connecting fine to the internet through ethernet but i had to turn it off by long pressing the power button after it had frozen for over 10 minutes because the vmware ...
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1answer
84 views

Automatically get IP address (DHCP) when plugging the ethernet cable in

I have a freshly installed system ; it's Raspbian (based on Debian), on a Raspberry PI, installed with raspbian-ua-netinst. I believe this is a general linux question, though feel free to redirect me ...
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1answer
29 views

From where does dql (dynamic queue limit) variables in kernel get their value?

Context : I was working with a custom driver in an arm SoC, while trying ifconfig enp1s0 up. I was getting a report like below WARNING: CPU: 0 PID: 0 at /home/abc/Yocto_Setup/fsl-release-bsp/build-...
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0answers
1k views

ifup shows IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready, then the link becomes 'ready' by itself. What is happening?

I am stuck with some strange behavior comming from my linux system. I have two ethernet interfaces (eth0 and eth1). When trying to set them up for the first time (for example with ifup eth1, or ...
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0answers
36 views

Using two IP connections in parallel for resilient delivery

I have a mobile Linux server with two LTE connections to the internet, via different providers. The mobile server also acts as a router for other devices, currently using masquerading on just a ...
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2answers
235 views

What and How to install Ethernet adapter drivers

I'm currently trying to set a computer with Ubuntu Server (version: 16.04.3). I believe the drivers for the wireless adapter are installed, but I need the iwconfig utility/command to configure it. ...
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1answer
32 views

CDC 4G and network interfaces

I currently use an embedded system with 4G (Usb0 interface) and two Ethernet interfaces. The 4G pcie module works when the eth0 and eth1 interfaces are disabled but not when eth0 and eth1 are enabled ...
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94 views

Start ptpd while interface eth0 has no IPv4 address set

I want to start a ptp daemon on system start. I set /etc/default/ptpd to: # /etc/default/ptpd # Set to "yes" to actually start ptpd automatically START_DAEMON=yes # Add command line options for ...
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2answers
369 views

Setting default network interface?

I have a Debian workstation with two interfaces: the ethernet jack attached to the motherboard (eth0), and a USB to ethernet adapter (eth6). eth0 connects to the internet, while eth6 connects to some ...
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0answers
42 views

Simultaneous eth and wlan connection [duplicate]

I have an ARM based computer wirh Ubuntu server 14.04 LTS installed. I need to have two network interfaces. One is via ethernet and the ethernet cable is connected to a camera that takes photos. My /...
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0answers
284 views

SIOCSIFFLAGS: No such device

I am having issues while trying to enable eth0 interface on my Pine64 SBC. I am running the following Armbian version: Title: Armbian 5.38.180128 Pine64 Debian stretch next Kernel: ...
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0answers
104 views

Working with two Ethernet Connections simultaneously in linux [closed]

I'm trying to set up a Debian virtual system that can handle two Ethernet/NICs at the same time.But I can't get it to work. The OS I'm trying to set up is Kali running on VMware Workstation 14. The ...
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1answer
540 views

Linux disables ethernet auto-negotiation on plugging-in the cable?

I recently noticed I am only getting 100Mbit/s of througput on my gigabit home network. When looking into it with ethtool I found my ArchLinux Box was using 100baseT/Half as link speed instead of ...
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1answer
126 views

How to talk with IP camera through ethernet directly (no switch, hub, routers…). Different subnets in camera and ethernet's port

I want to configure an IP camera which is in my raspberry pi's ethernet port (I connect to it through wifi). I connected the camera and this is what I see when I run ifconfig eth0 Link encap:...
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0answers
46 views

Connection to network not established on startup

I just installed the KDE Neon LTS 5.8 system on my PC. With the new system the wire network connection is not established on startup. I had the same configuration using Kubuntu 16.04 and it worked ...
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0answers
328 views

Can't connect to internet on CentOS 7 minimal installed on Macbook

So, I got a DVD iso on my USB and I installed it to my macbook with minimal version, then I boot on it. But then I found out there isn't internet on it. You can't run yum, can't ping other site, I've ...
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0answers
21 views

NC364T nic lots of drop when traffic hit 250kpps rate

I have Server with 32 core CPU and it has NC364T Quad 1G ethernet and i have notice when packet rate hit 250kpps (200,000 packet per second) i start seeing intermediate drops in ifconfig output and in ...
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1answer
275 views

Sharing ALL network connections from wifi to ethernet

So, what I want to do sounds really simple to me, but I can't find anything about this... I have two computers. One computer has a wifi connection (it's a Nvidia Jetson TX1 running Ubuntu 16.04), the ...
2
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1answer
782 views

Remove SOME advertised link modes with ethtool

I'm in a situation where I have a 10/100/1000-capable PHY cabled only to support 10/100. The default behaviour is to use the autonegociation to find the best mode. At the other end, using a gigabit ...
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0answers
93 views

VLAN tag insertion on outgoing packet

I am working to insert vlan tags for some client macs on outgoing packets via native vlan. I have tried nh_hooks IN, OUT and Forward but didn't get any success. Can I either: add the tag to the ...
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3answers
1k views

check if network cable is plugged in given NIC

Server has multiple NICs, only one of which has cable plugged in. How can I test whether given port ethX is plugged in or not ? I found many similar questions, but neither ethtool nor cat /sys/class/...