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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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Disabling Power Saving Modes on Mellanox BlueField DPU

I'm currently working with a Mellanox BlueField DPU and I'm facing some challenges regarding the power saving features that seem to be affecting the network performance. I have used ethtool to explore ...
NIU A's user avatar
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Netplan Bridge Does Not Support Multiple Interfaces

Issue: When bridging multiple NICs using netplan, client hosts connected to the bridged NICs cannot communicate with the gateway server. The goal is to have all bridged NICs share the same static IP ...
Steve O's user avatar
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105 views

Can't SSH PC running 2 network cards from second network

I've got an Ubuntu PC (Machine A) with 2 network cards connected to 2 different networks. Machine A can be ssh'd from a different machine that is on its first network (eno1), but can't be ssh'd from a ...
Drompo2's user avatar
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How to run command when a specific network interface has low outgoing bandwidth for a specific time period?

How to run command when a specific network interface has low outgoing bandwidth for a specific time period? enp7s0 [192.168.0.101] (1/4): ============================= Incoming: ...
God of Money's user avatar
3 votes
3 answers
410 views

2 Ubuntu servers, A is connected to B via ethernet. server B has 2 NIC, one of is connected to the internet. A cannot see B or the internet

I have one ubuntu server running 20.04 with 2 NIC – one connected to the internet gateway and the other connected to another ubuntu server running 22.04. I cannot get the computer running 22.04 to ...
Hisham Dawalibi's user avatar
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1 answer
298 views

Network Interface problems with Elkhart Lake platform

I am using the following board from congatech: https://www.congatec.com/de/produkte/pico-itx/conga-pa7/ which is a pico itx based elkhart lake board. I have Ubuntu 20.04 installed. The network ...
Jojo71's user avatar
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287 views

Unable to Connect to WiFi router from Ubuntu

I have a dual boot setup with Windows 10 and Ubuntu 22.04 LTS. Now there is a issue with my Ubuntu operating system not being able to connect to my router, but interestingly, i can connect to the WiFi ...
DG_88's user avatar
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NIC down after wakeonlan

I've setup wakeonlan on an Ubuntu 22.04 machine using iw, following this tutorial: $ sudo iw phy0 wowlan enable magic-packet disconnect I then control the machine over ssh with wakeonlan <MAC> ...
maousi's user avatar
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1 vote
1 answer
400 views

How to fix Nic not connecting?

I'm running Kubuntu 20.04 on an older PC. The NIC on the motherboard has been giving me trouble recently, occasionally disconnecting and requiring a reboot to reconnect. So I added a PCIe Ethenert ...
sbbid's user avatar
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1 answer
3k views

NIC issue says "Link is up/Link is down" continuously

I'm trying to make my Ethernet connection work on my Ubuntu laptop but for some reason the NIC refuses to work. I've tried everything I know, everything I found in the internet and it still doesn't ...
Jimmy's user avatar
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Cannot set interface (NIC) up: Atheros ath9k_htc in Ubuntu 18, kernel 5.4.0-128

I am trying to use the wifi adaptor TP-Link TL-WN722N (which user Atheros ath9k_htc). But I can't have it go up. ~$ sudo ip link set wlxc4e9841384f9 up returns with no error, but: wlxc4e9841384f9: &...
Helen Craigman's user avatar
1 vote
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161 views

Why is there less latency and jitter when there is additional high bandwidth traffic between two computers with Ubuntu 22.04 installed on them?

I have two computers that are connected via an Ethernet cable with Ubuntu 22.04 installed on them. I have a client on computer A) which is sending UDP packets to a server on computer B) and I am ...
Nandor Takacs's user avatar
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1 answer
123 views

How to replace old PCIex NIC to Ubuntu server

This might seems a silly question for mostly system managers but I haven't found a well documented article on the web about it. The thing is, I would like to replace the old 10/100Mbps PCi-ex network ...
Jose M's user avatar
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2 votes
3 answers
1k views

How to enable Maxlinear PHY GPY115 Drivers

About a year ago driver support for Maxlinear GPY115 NIC was merged into kernel v5.15-rc1. I hoped this driver would work on a new system I'm working on (Onlogic HX310). I installed Ubuntu Server 22....
CedricWassenaar's user avatar
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1 answer
2k views

Can't get Ubuntu to use two NICs at the same time on different networks

I am running Ubuntu 20.04.4 LTS and am having a hard time getting both NICs to work at the same time on different networks. I have network 1 that connects to the internet and network 2 that connects ...
LabCoatNomand's user avatar
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1 answer
1k views

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 ...
Huy Le's user avatar
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20 views

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 ...
West Young's user avatar
2 votes
0 answers
210 views

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 ...
namos729's user avatar
2 votes
1 answer
2k views

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 ...
Leandro Loureiro's user avatar
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475 views

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 ...
Ben Muircroft's user avatar
3 votes
1 answer
11k views

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 ...
DefaultVLAN's user avatar
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200 views

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 ...
MUSICS's user avatar
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1 answer
1k views

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) (...
Kalvin Klien's user avatar
0 votes
1 answer
2k views

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 ...
OpenSource's user avatar
0 votes
1 answer
390 views

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 ...
Bram's user avatar
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3 votes
1 answer
6k views

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 ...
anmomu92's user avatar
0 votes
0 answers
290 views

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 ...
SeAlGhz's user avatar
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1 answer
736 views

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 ...
sodaws's user avatar
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-1 votes
1 answer
5k views

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 ...
Mike milkshake's user avatar
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1 answer
1k views

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 ...
yusisushi's user avatar
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1 vote
1 answer
1k views

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: ...
Liquid Plasmas's user avatar
1 vote
0 answers
901 views

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 ...
user3731591's user avatar
1 vote
0 answers
66 views

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 ...
TheOneWithTheBraid's user avatar
1 vote
2 answers
349 views

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 ...
StewLG's user avatar
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1 vote
0 answers
2k views

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 ...
user3207650's user avatar
0 votes
0 answers
678 views

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 ...
haron's user avatar
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3 votes
2 answers
9k views

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 ...
Daniel's user avatar
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0 answers
47 views

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 ...
firdaus's user avatar
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0 answers
193 views

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 ...
Anders Yuran's user avatar
0 votes
1 answer
2k views

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
ENIO MARKU's user avatar
1 vote
1 answer
97 views

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 ...
Waleed's user avatar
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2 votes
0 answers
483 views

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 ...
Andrea's user avatar
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0 votes
0 answers
2k views

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. ...
fajin yu's user avatar
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0 votes
1 answer
3k views

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-...
Pie Pie's user avatar
0 votes
0 answers
170 views

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....
Same Arnold Nyaga's user avatar
0 votes
1 answer
935 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 ...
Rohan Wijeratne's user avatar
3 votes
2 answers
4k 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 ...
njames's user avatar
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0 votes
2 answers
498 views

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 ...
HellrazorX's user avatar
0 votes
0 answers
221 views

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 ...
CandyCorn's user avatar
1 vote
0 answers
258 views

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 ...
mike's user avatar
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