Questions tagged [ethernet]

Ethernet is the most common set of standards for wired connections in local area networks.

Filter by
Sorted by
Tagged with
0
votes
0answers
10 views

Setup L2TP Tunnel to transport Ethernet Frames on pfSense and xl2tp

We have two sites connected through an IPSec Tunnel established between a pfSense Firewall on each side. Hosts from both sides can communicate fine through IPSec. We have a new application using ATA ...
0
votes
0answers
22 views

VLAN trunking on Linux Bridge

Local Lab Design This is the network diagram I am trying to implement. I have 3 VLANs whose description is given in the image and I am using Proxmox to create and configure virtual machines. When I ...
0
votes
0answers
23 views

Need feature name: ethernet switch recognizes manual cable disconnect and shuts down the port

Once in a hospital's radiology department, we had this nifty security feature -- I just cannot remember the proper name to succeed at various search engines: If a host's ethernet cable was ...
-1
votes
1answer
19 views

Automatic switching between ethernet and 4G on router? [closed]

I have a router which have both incoming internet through Ethernet and 4G via USB. My fiber connection is unstable, and I have gotten a courtesy 4G SIM from my ISP. Is it possible to set up the router ...
0
votes
0answers
111 views

How to bond two interfaces having different speeds in Linux?

I have successfully set up two simultaneous VPN tunnels over different Internet connections to the same server. Then I've bonded them using systemd-networkd and balance-tlb mode. It works as designed,...
1
vote
1answer
70 views

How to connect computers directly with ethernet?

I try to connect two linux computers via a crossover cable. I need help at troubleshooting. I configured ip-address , and on PC1 ifconfig-command shows enp0s7: flags=4163<UP,BROADCAST,RUNNING,...
0
votes
0answers
54 views

hostapd AP over both wlan0 and eth1

My hardware setup is currently: Router -> RPi (eth0) -> RPi (wlan0) -> subnet for my devices My desired setup is: Router -> RPi (eth0) -> RPi (wlan0 + eth1) -> subnet for my devices My setup: The ...
1
vote
3answers
86 views

Making an argument for over-provisioning fiber

I work in research university, and we are moving to a new building. I suspect that new building will be equipped with mostly 1GbE copper, 10GbE copper, and possibly 10GbE-compatible fiber. Is it ...
0
votes
2answers
59 views

Reasons for ethernet interface to stop responding for ~30 seconds, then acknowledging all received packages?

First question! Hi! Running on Ubuntu 16.04. Hardware info: lspci | awk '/[Nn]et/ {print $1}' | xargs -i% lspci -ks % 00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2) I219-V ...
0
votes
2answers
46 views

Is there a way to alias a specific interface ip?

I've got a VCS running on debian as prod server, and due to some hypervisor issues it had to be rebooted/migrated/updated several times in the past week. Because i'm running my app using docker ...
0
votes
1answer
109 views

Ethernet patch or crossover router to router [closed]

I we have run Ethernet in the house, through a fast Ethernet switch, through a wall patch, over the river and through the woods as it were. From router A, through switch, through wall patch, then to ...
0
votes
1answer
91 views

Ethernet Cable Broken [closed]

Hi I have a 15m ethernet cable going under my floor from the front to back of house. It has developed a fault and pins 1 & 6 are no longer connected (I've tested it). Given getting it back up or ...
1
vote
1answer
60 views

A way to configure DMZ zone on Ethernet Mellanox Switch

Can't find any information is it possible at all and how to configure DMZ zone on Mellanox MSN2100 switch. If I setup ACL disabling traffic from DMZ to LAN, I can't receive response to requests made ...
0
votes
0answers
239 views

How to bridge two VMWare vsphere “VM Network” on two different site?

I got Two site with some ESXi 6.7. Each site has his own IP addressing and I would like to bridge the "VM Network" on the distant site to the local "VM Network" so I could start a VM replicat on the ...
0
votes
0answers
45 views

Debian / Kerio is ARP storming my ISP after loosing connection to the gateway

The problem: after Kerio Control (Debian) lost connection to the gateway it starts sending ARP like for "who has 8.8.8.8?" in such frequency, that the gateway gets shut down due to packet inspection ...
0
votes
2answers
113 views

Windows Server 2016 Installation doesn't found Network adpter (Hard Drive Found!)

I have a just bought PowerEdge T640 server and i am trying to install Windows Server 2016 Standard. I have downloaded the Windows Server 2016 ISO and mount a bootable pendrive using Rufus. I boot the ...
0
votes
1answer
54 views

Ethernet wiring of pairs for a 100mbit configuration

In Ethernet wiring, for a 100mbit configuration, if Pairs C & D are connected at one end instead of pairs A & B, would it function? Computer: Eth A ==| B ==| ...
1
vote
1answer
43 views

What's typical in terms of reliability for fully wired Ethernet LAN for normal, non-outage, non-overload conditions?

Can anyone point me to industry guidance of any kind for expected LAN reliability for normal, non-outage, non-overload conditions? I suspect some device is blocking or throttling my connections. I ...
0
votes
0answers
43 views

Connecting Render Farm to Local Network

New to networking so...Looking to see if this is possible...It's also not an ideal setup so if you have recommendations on better hardware/software, I'm open. I have a render farm with 23 computers, ...
0
votes
1answer
73 views

How is 10GBASE-T defined for providing compatibility?

Is there a common source for description (like for "data link layer" and might include electrical specification of "physical layer") of 10GBASE-T as standard for technical devices? Considering ...
-2
votes
1answer
366 views

What transceiver can convert 10GBASE-KR or 10GBASE-KX4 to 10GBASE-T or 1000BASE-KX to 1GBASE-T? [closed]

A pci-e network card supports 1000BASE-KX, 10GBASE-KX4 and 10GBASE-KR on SFP connector, but the required mode for twisted pair support on RJ45 (8P8C connector) is 1G- or 10GBASE-T. What type of ...
1
vote
1answer
315 views

Host unreachable if eth0 has no IPv4 in ethernet bridge

I am currently attempting to configure an ethernet bridging VPN with the use of OpenVPN. However, whenever I am trying to setup the ethernet bridge, the server (Raspberry Pi) looses connection from ...
0
votes
1answer
65 views

how to safely increase a network's MTU

I want to increase the Ethernet Maximum Transmission Unit (MTU) for some hosts on a local network. Is there a known sequence of steps to follow? Or, can I just tweak each host's MTU as needed and it ...
0
votes
1answer
126 views

Zabbix eth0 incoming traffic, triggering false alarms?

I'm a bit confused right now, I just got this false alarm I had an item set up to monitor incoming and outgoing traffic on my servers and despite it working as intended for A WHOLE MONTH, suddenly I ...
0
votes
0answers
301 views

Where to find list of possible arguments for ethtool -K?

When I want to disable/enable interface features with the ethtool -K command, how can I list all available options? When I run ethtool -k I see a list of options, but I don't know the equivalent ...
0
votes
0answers
18 views

Mapping a remote serial port to a Debian VM

I have a Debian Stretch VM that is dynamically migrated between a few hosts. I need to connect a serial (RS-232) modem to it. Unfortunately, I cannot use the hypervisor for this. I am looking for a ...
0
votes
1answer
14 views

Can Pause frames be transmitted from one interface to another on a single host? (flow control)

If I have a 1G egress NIC and 10G ingress NIC on a single Linux host (ixgbe NIC driver), is it possible that one NIC would throttle the other with flow control / pause frames?
0
votes
0answers
151 views

Arista 7048T-A Enabling ethernet ports, interface does not exist

On the switch I'm trying to enable the ethernet ports for internet access to no avail. After setting the DNS, Default gateway I'm now trying to enable 2 ethernet ports on the switch (port 1 and 2 but ...
0
votes
1answer
44 views

Industrial switches failing to pass broadcast traffic/ARP requests very slow

I'm dealing with some industrial Ethernet switches (Phoenix Contact FL Switch SF 16TX) which are connected to about 5 computers and 5 SLC/5 PLCs. We are having an issue where ARP requests are not ...
0
votes
2answers
91 views

Ethernet cable link negotiation

I just bought a SoC computer with 4 eth ports which I plan to convert into a router with Linux. I connected a CAT5 cable to both one of the eths and to my notebook, but I don't seen link on either ...
0
votes
0answers
25 views

How can I automate the installation of an Ubuntu image using a USB device?

I have to automate the installation of a Linux image. The perfect behavior would be that I plug the USB, turn on the device and it runs the dd command in order to flash the image stored in the USB ...
0
votes
0answers
34 views

Is the length of ethernet frame fixed between different media? [duplicate]

According to wikipedia, ethernet frame is 1522 bytes long. However, in wireshark's wiki, it seems it is not always true: As the Ethernet hardware filters the preamble, it is not given to ...
0
votes
1answer
76 views

2+ PORT NIC Explained

I am very confused about two or more port network interface cards (NICs). Does having 2 port on a NIC allow you to have 2 network interfaces? If I go to ifconfig will it list each port as a separate ...
0
votes
0answers
230 views

Docker creating dummy ethernet interface

Is it possible to create dummy Ethernet interface using Docker build below is snippet from DockerFile build logs. Step 14/17 : run sudo ip link add dummy0 type dummy && sudo ip addr add ...
0
votes
0answers
20 views

Interface config for an NGINX caching reverse-proxy in front of a system I can't modify?

Not-An-IT-Person here, We have a small web server that is overloaded. I need to stand up an NGINX caching reverse-proxy in front of it (found a good recipe), but I can't modify the existing server ...
0
votes
1answer
2k views

Collecting SFP+ attributes in Linux

I need to collect hw component inventory from physical systems running RHEL (6 and 7) and its derivatives. I need to collect the SFP+ attributes along with the rest of the components. I know I can ...
1
vote
1answer
94 views

Can I use source MAC of Ethernet packet for UDP reply instead of ARP lookup?

I'm working on an embedded platform with very limited resources where I need to build my own Ethernet frames. If I need to answer a UDP request with a UDP reply, is it ever not OK to just send the ...
4
votes
2answers
1k views

Is it safe to connect a PoE injector switch to an ordinary PC?

Is it safe to connect a 24 V PoE switch output to an ordinary PC Ethernet input?
1
vote
1answer
106 views

check if physical auto-negotiation is ongoing

Is there any way in Linux to see if an ethernet auto-negotiation is ongoing or has already terminated? For instance, I see that in my network it takes a 1Gb interface 3 to 4 seconds to correctly ...
0
votes
0answers
2k views

How to manually setup network connection from Busybox shell (ash)?

An embedded device running Linux version 2.6.26.5, ARM Linux Kernel. Busybox v1.10.2 shell (ash), I'm in Busybox shell. I want to set up connection between embedded device and computer. Is it ...
1
vote
1answer
244 views

Why one of virtual NICs called bond0?

I just took over a very old network cluster(no documents and manual left) so I have to imagine the meaning of configuration by myself. Some of the servers' IP configure as following(when I issue ...
1
vote
0answers
40 views

Two network interfaces, can't access to public one from internal network

I have a server with two network cards: eth0 -> public static ip eth1 -> local network dhcp Both cards are connected to the same modem. If I enable only eth0, I can access from local network (...
0
votes
0answers
228 views

What is the precise meaning of an “Ethernet Drop”

Do the words "Ethernet Drop" (without other qualifications) imply that both sides of the connection are terminated in RJ45 sockets? I am trying to interpret a document where I am unsure that work ...
-1
votes
1answer
907 views

How to get multiple Ethernet-Ports (NICs) working simultaneously on a linux device

I'm new to routing and networking so I hope some of you can help me to understand the issue and how to fix it. Current Situation: I have a linux server (raspbian/ubuntu). This server has two ...
1
vote
1answer
38 views

Why do my P.L.Cs (Power line converters) devide the speed by two?

If I directly connect to my 100MB router with a CAT.5e cable, I get these results : $ speedtest --simple Ping: 8.617 ms Download: 92.54 Mbit/s Upload: 93.90 Mbit/s $ ethtool eth0 Settings for eth0: ...
5
votes
2answers
615 views

Hardware involved in Direct-connect (switchless) 2-node Storage Spaces Direct Cluster

For my department, I envision a two-node cluster of identical machines, running S2D. I want to use Broadcom 57416 10GBASE-T Adapters (example description), because they support RDMA and run at the ...
0
votes
0answers
35 views

Ubuntu 16.04 takes a very long time to configure 2000 virtual IP addresses

As part of some testing I do, I have to configure a 1000 IPv4 addresses and 1000 IPv6 addresses on a linux server. I am doing this on Ubuntu 16.04 (server edition). After configuring these in /etc/...
1
vote
1answer
670 views

Trouble enabling Jumbo Frames?

I'm trying to enable jumbo frames. I have a linux client & a windows server. I've standardized across the board on intel nics. On the windows server the only choice for jumbo frames is 9014 & ...
0
votes
1answer
46 views

One machine's network usage can increase latency for everyone sharing the same ethernet switch

I'm managing an office network of about 20 computers, which all share a common ethernet switch (unmanaged), which is then connected to the ISP's cable modem/router combo. Every now and then someone ...
-2
votes
1answer
71 views

Ethernet cable only works A to B, not reversed. Why? [closed]

A custom ethernet cable with both connectors wired as T568B only works when connecting A to B, but not reversed, i.e. when switching ends and connecting B to A. A is a Mac, B is a 1Gb TP-Link ...

1
2 3 4 5
13