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Questions tagged [nic]

NIC stands for a network interface controller (also known as a network interface card, network adapter, LAN adapter and by similar terms). It is a computer hardware component that connects a computer to a computer network.

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Which ping-like command to measure lowest-latency possible between two machine?

My task is to measure the network latency between 2 machines (both 1-way and 2-way are OK). The 2 PCs are in the same room, on the same network, and connected to the same router. When I use the ping ...
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Why my nic will up after insmod the driver,I didn't run the "ifconfig eth up"?

There is no file in /etc/network/interface.d and /etc/network/interfaces. Is there any other configura file? I am using ubuntu 20.04.I think if my nic driver in /lib/module/uname -r/kernel/driver,the ...
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Installing 20.04 server, interface is missing

I have an onboard Realtek NIC and it is enabled in UEFI/BIOS. I also enabled SRIOV. During installation when it gets to Network, there is no interface to set up. All I can do is create a bond, and ...
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2 votes
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Every time I reboot Ubuntu 20.04, the the opposite NIC becomes active and the names swap

This is driving me crazy. Every time I reboot my 2 NIC server, The names of the two interfaces swap with each other but obviously the MAC addresses stay the same. I can get a network connection but I ...
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Intermittent NIC on Dell Optiplex 9020 Ubuntu 20.04.3 LTS

The problem is that the NIC drops out intermittently every few minutes. Similar questions have been answered on this problem, but the answers involve changing settings in Windows. This computer has ...
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2 votes
1 answer
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Avoid/automate compiling e1000e driver with new kernel updates

I have home server that has installed an ASRock H670 ITX that has NIC Intel I219V, running Ubuntu 20.04.3. The problem is that kernel does not have driver for this NIC. I had to install manually using ...
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New Ubuntu - Install wireless drivers with no Ethernet available?

The Problem: I'm in Spain and my friend in America is new to Ubuntu and he has a tower pc that he installed Ubuntu Mate on, but then I find out that he has zero access to any ethernet (no friends have ...
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Ubuntu 20.04 - NIC naming and match MAC with Netplan

I did my research before asking here; tried so many different things but I'm already lost about it. I'm running 20.04 (Modified version, GNS3 VM on ESXi) with 10 NICs. From time to time if I make a ...
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How to configure two or more network interfaces to work simultaneously on different users I log into linux

I have 2 nics on my pc and I need to configure them to work simultaneously on each user I log in, one nic per user, (knowing that you can change the user and the programs of one keep running even if ...
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Network card without needing to install drivers

We're looking for a network card that works without it having to be installed via drivers. Ubuntu Version: Ubuntu 20.04.2 LTS Kernel version: Linux version 5.4.0-73-generic (buildd@lcy01-amd64-019) (...
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Huge CPU load under large amount of TCP connections

Under a large amount of TCP connections, one CPU core will always go up to 100%. After that happens, the whole VM would start lagging and there will be an evident packet loss. Is there a way to solve ...
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Change Ring parameters' pre-set maximum limits for NIC

We have a Dell Poweredge R440 with Ubuntu 20.04 LTS (Kernel - 5.4.0-80.90-generic). The ethernet adapter is Broadcom NetXtreme BCM5720. I need to increase the Ring buffer value to 4096 for both RX and ...
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How to change your NIC on Ubuntu 18.04.4 LTS?

I have an old craptop with Ubuntu 18.04.4. The built in wireless NIC sucks, and I want to use a Linksys usb wifi adapter. Where/how can I make this change? Thank you.
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RTL8125B NIC stopped working

I have a 2.5GBps NIC: RTL8125B which did not work out-of-box. It would not even show up in lspci. After installing r8168-dkms package, and rebooting, I was able to use it for a week or so. Today, the ...
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2 votes
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Why can't two interfaces belong to the same subnet?

I have a setup in which I have two hosts (A and B) connected between them. Each host has got a 4-port Network Interface Card (NIC). When I configure all eight interfaces to belong to the same subnet ...
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how can I do ip forwarding with one NIC?

I have two computers and each has one NIC . is it possible to forward IP through one NIC? or I need at least 2 NIC in one of my computers? EDITE: I need ip forwarding in my local zone. for example ...
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Intel 82576 NIC loses PCIe link when inserting RJ45 SFP module. Can't revive it without power cycling

I'm not sure if this is the right place to ask. Unfortunately I don't know much about all of this, so I can't tell if this problem is related to the igb driver, the firmware of the chip (eeprom?), the ...
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Only lo interface in /etc/netplan Ubuntu 20.04

I build a PC with a Gigabyte GA-MA790XT-UD4P motherboard. And i installed Ubuntu 20.04 as OS. But i realized i was not connected to the internet. Until suddenly i saw that my Ubuntu machine only has ...
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Wakeonlan only works 5 seconds after shutdown

Any help would be appreciated, I had WOL working on my previous sytem and really would like it to function again. I'm using Kubuntu 20.04 LTS. I viewed other threads with no solution applied to me ...
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Dual NIC Configured as Router with NAT

I have a PC running Ubuntu 18.04 and am attempting to configure the two GbE interfaces as a gateway/router. I've referred to some related questions and attempted to follow guides such as this one: ...
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Ubuntu 18.04.4 - Network Unclaimed After NIC Firmware Update

I recently updated the firmware on my HPE NC522SFP NIC so that it matches the corresponding NIC I have in my other machine (latest firmware). After doing this, Ubuntu no longer recognizes the card and ...
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Dual NIC silently rejecting all incoming traffic from one interface

In my server, I have two ethernet cards: enp0s17, local IP 192.168.0.7, router's public address x.x.x.x, netmask 255.255.255.255 enp0s18, local IP 172.16.0.7, router's public address y.y.y.y, netmask ...
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Problem chaging to new NIC card on venerable server running Ubuntu 18.04

I am trying to add a 10gb NIC card to an ancient Ubuntu server running 18.04 and having difficulty. I am current on apt-get updates, but the server has been running for at least a decade and I believe ...
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Link Aggregation Issues (LACP)

I am running a nextcloud server on Ubuntu 20.04, and set up link aggregation. It doesn't seem to be working unless the server is in use. For example, if I am running a speedtest on the server, I am ...
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I need to change a PCI bus number for my NIC. (SETPCI)

after running lspci | grep net -i I have discovered that my NIC sits on the following bus:- 00:14.3 Network controller how can I make it sit on any other bus ID ? lets say for Ex. 00:01.0 instead ...
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3 votes
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Trouble getting a bridge working with GNOME Boxes [closed]

I set up a Fedora VM using GNOME Boxes. I can launch it, everything's OK. I'm using virt-manager and I want to create a bridge so that I can get the VM on the network, but every time I attempt ...
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Ubuntu PC vs ethernet

I have been experiencing a conflict so bizarre between my ubuntu PC vs my tp-link router that I don't know where or what to be searching for. A few months ago, I assembled an AMD-ryzen + ASUS prime ...
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Virtual interface

I have a vps with a provider. It has 2 interfaces eth0 and eth0:1, each with one ip. One ip has normal web rules. The other one I want to restrict to only accept traffic to port 5001-5999 Regards ...
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How to check if my PC has a 'Intel 82599 10 Gigabit Ethernet Controller'

How can I check through Ubuntu terminal if Intel@ NIC of my PC has Intel 82599 10 Gigabit Ethernet Controller
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1 answer
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14.04: Enabling the 2nd NIC on the server [closed]

I have read a lot of posts and tried all the suggested work but still no luck. I have a server with 2 onbord nic, em1 and em2. Both are configured as follow iface em1 inet static role ...
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USB NIC cause: *** buffer overflow detected ***: python terminated

debugging a lot my software (python+compiledC++) on different machines (workstations and laptops with same OS Ubuntu 18.04 64 bit) I figured out that by using my USB Type C Network adapter (and the ...
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Why NIC name always change after reboot?

I'm managing lots of servers which runs Ubuntu 18.04 server. And it has at lest 4 NIC for each server. My server will reboot every weekend, and I always found the NIC name changed after reboot. ...
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I have a intel AC 8260 and cant find the drivers

Hi I bought this part https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.amazon.com/1200Mbps-Ubit-Bluetooth-Dual-Band-PC-Shipped/dp/B07JNMZWZL&ved=2ahUKEwj-...
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Ethernet controller

My Ethernet interface doesn't work: when I insert my ethernet cable, the port blinks but nothing happens to my connections. My wifi card is functional. So was my Ethernet when I used to run Windows 10....
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626 views

Network Card working only at 100

I installed Ubuntu 16.0 on a Dell 7010 desktop, but the network card only connects at 100mbps. I installed a second TPlink network card and that also works only at 100mbps. The same network cards ...
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2 votes
2 answers
2k views

netplan default gateway / route Internet traffic to WiFi

I need help with a (simple) network configuration with netplan. It is very simple, I have 2 NICs: enp5s0 is ethernet and give access to the company network, and wlp4s0 is WiFi and give access to ...
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Second NIC makes Gigabit Ethernet drop to 100mbit

I got a computer hosting VMs. This computer has TWO gigabit Ethernet cards. Whenever I connect the a cable to the second NIC, the speed of the first drops to 100mbit even though it is seen as a ...
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Ubuntu 18.04.2 LTS NIC Drivers work, Alt 18.04.2 NIC Drivers don't work

DHCP seems to work just fine with the normal LTS server iso. However the drivers on the LTS (Bionic Beaver) don't allow DHCP to work, and I can only ping some local addresses. The goal is to have my ...
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Dual Boot Ubuntu 18.04 & Windows 10, cannot connect to ethernet in Ubuntu

I recently installed Ubuntu on a machine that runs windows 10. Everything works except for Ubuntu connecting to the wired internet (no wifi). The internet works in windows. I have tried a few ...
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Network Card (NIC RTL8111HS) Driver installation 18.04

I just installed Ubuntu Server (Bionic Beaver) on a new PC. It seems like my internet connection does not work at all (pinging Google does not work and the orange LED on the ethernet port lights ...
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Ubuntu 18.04 PXE-booting with Realtek r8152-based NIC, no interface found

I am upgrading my PXE boot infrastructure with 18.04, but I am running into a consistent problem with our Dell XPSen - when PXE-booting from the official Dell FM76N (Realtek r8152-based) USB NICs, the ...
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My Nic is using two different IPs. I do not want one of them

Recently I changed my network from 192.168.1.0 to 192.168.100.0. My ubuntu desktop seemed to cope well but after a restart, wouldn't get out to the internet, but I could ssh to it and ping it on the ...
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How to check network bandwidth capacity in my Ubuntu device?

I need to check my ethernets cards network bandwidth capacity. The software instructions gives this command: sudo ethtool eth0 | grep Speed But when I try to run it in Ubuntu, I get this error: ...
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RTL8188ee WiFi very slow

I recently bought a tp-link Archer wn781nd for my desktop. The WiFi speed is very slow compared to my laptop. My OS is Ubuntu 16.04 kernel 4.13.0 -41 I had a similar problem when using my laptop ...
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11 votes
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How can I create a bond interface in Ubuntu 18.04?

I'm trying to reinstall an Ubuntu server to 18.04. I discovered that 18.04 uses Netplan, and I'm having trouble creating a bond interface using this. Updated configuration: ############# BOND - ...
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8 votes
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multiple NICs under ubuntu 18.04

How to translate what we had to do to have 2 independent stream of traffic on 2 or more NIC interfaces with the new netplan.io + systemd-networkd? auto ens2 iface ens2 inet static address 192.168.5....
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disabled NIC on 17.10 - now can't get NIC enabled

I'm an Ubuntu N00b and to be "extra secure" I decided to disable my NIC (on a virtual machine version of Ubunti 17.10) I did quite a bit of searching and trying stuff out with the network adapters ...
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Ubuntu 17.10 with two NICs: routing requests to correct NIC

I have done a bunch of searches about this, and found a lot of answers that don't quite seem to fit my question. If this question has been answered already, I apologize. My PC has Ubuntu 17.10, and ...
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1 vote
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Same hardware & OS, different network adapter name

I'm currently installing 2 new servers, exactly the same hardware & installation procedure. Both machines have 4 NICs, 2 x 1Gbit and 2 x 10Gbit The 1Gbit ones get a different name and I have no ...
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3 votes
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How to directly connect computers that are also on the same LAN?

Here is the layout of my local network: Client (Running Ubuntu 17.10). Server (Running Ubuntu Server 16.04). Simplified ASCII art of my network: Client~~~~~~~Server | | | ...
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