Questions tagged [gigabit-ethernet]

Gigabit Ethernet (GbE or 1 GigE) is a term describing various technologies for transmitting frames in a network to a speed of Gigabit per second (1,000,000,000 bits per second), defined in IEEE 802.3-2005.

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Gigabit Ethernet full-duplex is actually 2Gbit/sec counting both ways?

My understanding is that gigabit Ethernet over twisted pair, 1000Base-T, is full-duplex by default. Does that mean that the actual bandwidth, can be 1 Gbit/sec in each way simultaneously, hence 2 Gbit/...
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The internet download speed drops to <20 Mbp/s randomly

A few months ago I started noticing internet speed drops, to a point that the internet is almost unusable (sometimes around 10Mbps or 5Mbps, very rarely it drops to 120Mbps). Running a speedtest ...
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100MBps instead of 1000MBps (ethernet)

[my network card specifications] 2recently I bought a netgear PL1000 ethernet adapter. It has a maximum download speed of 1000Mbps. However I only get around 50Mbps in a internetspeed test. You can ...
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connect gigabit eth switch to 802.11ac network

I have a wireless router (802.11ac) for internet access which I use directly to connect to with my WLAN devices. I also have small LAN on a gigabit switch. How do I connect the switch to the wireless ...
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1answer
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gigabit lan setup NOT gettig optimal speed

I have a LAN router from vendor which has 4 ports all ports are connected to machines static ip is mapped to 1 of the machines but static machine is routing traffic to other machines via the same ...
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118 views

Realtek 8111 LAN not working properly stuck on 10mbps

I've opened a MSI support query to the staff but I also wanna ask in this forum too just in case someone can save me. The problem I have is that I've got a Cat 5E ethernet cable plugged into a gigabit ...
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1answer
57 views

Intel Enternet adapter l218-LM cannot reach 1Gbit speed

I have a router technicolor DGA223. The router works at 1Gbit/s capacity, and other computers connecting in a wired cable to the router have 1Gbit/s speed. Using the same wired cable and router port ...
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1answer
39 views

What can cause the network connection to degradate from 1 Gbps to 100 Mbps

I have a home network with a gigabit router, 2 PCs with Windows and a NAS from Synology. All are connected to the router via ethernet cable. When i bought the NAS, i was able to transfer data with a ...
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1answer
93 views

Use raspberry pi 3 as network switch?

I own a raspberry pi 3 with integrated wifi and I have several computers I would like to connect with ethernet cables for gigabit file transfers. Unfortunately the home's router is located on a ...
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1answer
3k views

10 Gb network card connection

I have just bought the intel X540T2 shown below and when I opened my machine I am not sure if I can plug it in any of the available PCIe slots shown below? If anyone could please advise
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Measure WiFi LAN Speeds Windows 10

I measure file transfer speeds when copying files from one W10 machine to another on a private lan home network via WiFi adapters only (no wired ethernet) as displayed by File Explorer (not perfect ...
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Slow network connection maybe caused by wiring

So today I got my new router and thus my new internet(1000mbit/s down - 50mbit/s up). The networking from my router to my computer is as follows: Router -> Cat5e -> TL-PA8030P -> electrical wiring -> ...
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Gigabit internet faster than gigabit

I have 1000Mbps internet at home, and I have been using a 802.11ac wifi router, from which I was getting around 900Mbps of both download and upload. Recently I upgraded to a wifi 6 router which is ...
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DL185 G5 poor Ethernet lan speed

I picked up this server for like $20 and just using it for my homelab setup. The problem is that the ethernet speeds are peaking at 8MB/s on the LAN and even worse to the internet down to like 5MB/s. ...
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1answer
63 views

Gigabit lan has slow speeds

So I am trying to setup gigabit lan and be able to transfer files across computers at over 100 MB/s. But I can only achieve 20-25 MB/s. My setup is the following: - Two machines: a brand new laptop ...
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Why is my laptop (Debian 10) only connecting with 100Mbit/s instead of Gigabit?

My laptop (Thinkpad T450s) with Debian 10 only connects with 100Mbit/s instead of Gigabit through ethernet, although the network card should be capable of Gigabit LAN (see #2 below). I tried a machine ...
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1answer
79 views

Best Gigabit Router Config

There was a question that I posted here [https://networkengineering.stackexchange.com/questions/65695/lan-speed-150-200-mbps-but-wifi-speed-is-5mbps-to-80-mbps] , which was off-topic. Hence I found ...
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Desktop and laptop network speed difference

I have desktop with Win 10 connected to 1 Gbps router via Ethernet, the link is full 1 Gbps (in ncpa.cpl). Also I have old laptop (Lenovo Y500) with the same networking configuration (NICs surely ...
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How can an Ethernet card use 1 Gbps while Device Manager shows no such option?

My Gigabit Ethernet card (which provides but doesn't require installing its external drivers) indeed gives me such speed in Windows 10. I therefore wonder how is it possible in Device Manager it ...
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1answer
66 views

Gigabit Ethernet Switch Issues

We have some 10/100 Ethernet devices with intermittent power-up connectivity loss when connected a various Gibabit Ethernet switches. We have tried multiple identical devices, with the same results. ...
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70 views

Router speed capped at 500 Kbps when connected through LAN port

I have recently brought a xiaomi router 4A gigabit edition (Global Version). I am connected to my ISP using PPPoE with a 5 Mbps connection. I am getting the correct speed on WiFi but from my PC which ...
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1answer
118 views

Why doesn't my USB Ethernet card ASIX by V.TOP give me 1 Gbps?

My router (Technicolor DGA2232) supports 1 Gbps LAN. I've confirmed this by being able to connect to it via WiFi in speeds close to that. However, when using V.TOP INDUSTRY LIMITED's 3 Ports USB 3.0, ...
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Optimize Performance of Google WiFi and CenturyLink 1Gbps Fiber

I had Google Wifi and it really works well. A few months ago I switched to CenturyLink 1Gbps Fiber service and overall I have been very satisfied with that as well. I have seen other posts of serious ...
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53 views

Inconsistent gigabit LAN speeds

I have two Windows 10 machines connected to my LAN. I have a gigabit unmanaged switch as the hub for my LAN. I looked around online and found Disabling "TCP Auto-Tuning" which didn't help. I then ...
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1answer
198 views

Does it make sense to share 10G Lan between 2 RJ-45 ports?

Observing TRX40 Motherboards for upcoming Threadripper 3000 series. So, see 2 mobos i like mostly. Gigabyte TRX40-AORUS-XTREME Gigabyte TRX40 DESIGNARE (rev. 1.0) First one has this in LAN part of ...
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1answer
576 views

Windows 10 Network Driver issue

For the past week or so, I've been having an issue with getting an Intel LAN Driver working on Windows 10 1903. I've uninstalled the official Intel drivers and let Windows use its own, then ...
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1answer
58 views

Can I use a switch to send high-bandwidth signals from multiple 100Mbps nodes to one central 1000Mbps node?

I want to stream video (compressed, ~20Mbps) from at least six raspberry pi zeros, each of which has a 10/100 USB ethernet adaptor, to a central PC with a 10/100/1000 port. All of the nodes will be ...
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3answers
462 views

How does the “Gigabit” bandwidth limit apply in an ethernet network?

Edit: it seems I either misunderstood or was misled by this article, which seems to imply that a 10 Gbps switch is required to make good use of a dozen nodes with gigabit ports. With the clarification ...
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87 views

Gigabit lan not going past 140mbs outside sandbox vm

sorry for the bad English. I have a gigabit connection (940mb day1 700mb tested with my laptop port today) my motherboard is an MSI z170 gaming m5, the LAN port is e2400 Atheros killer, the cable is ...
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1answer
142 views

New W10 build giving ~105 Mbps speeds with Full Gigabit hardware and 1 Gbps internet package

I have a bizarre issue. Windows Device Manager shows Auto Negotiation is enabled. Windows Network Status shows 1.0 Gbps Full Duplex. This is where it gets funky though. I just reinstalled Windows ...
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1answer
68 views

Direct PC-PC interconnection, parallel to main network

My network is as follows: Wifi-Router + DSL Modem, both in one device several devices that use wi-fi, irrelevant for the question PC A, connected to router via ethernet cable PC B, connected to ...
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1answer
303 views

Termination of CAT7A cable with CAT8 Keystone RJ45 connectors

I'm reconstructing our home and I'm thinking to upgrade the network. A part from the computer network I want to run some smart home applications and connect sensors over the network wires with PoE. As ...
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1answer
2k views

100mbps speed on a gigabit switch

Disclamer: I'm a total network noob. I'm setting up a home network. I have a small cheap gigabit switch (D-Link dlinkgo GO-SW-8G). I've placed it in a central(ish) location in my apartment and have ...
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1answer
52 views

Slow ethernet, despite GbE hardware: Searching for causes

I am having issues with slow network speeds in my home network between 2 boxes. Here are the specs: Box1: ASRock H97 Performance, Manjaro Box2: ASRock FM2A78M-ITX+, Debian 9 Switch: Netgear GS305v2 ...
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0answers
59 views

Intermittent domestic cat6 cable perfomance

Background I recently had an electrician run a cat6 ethernet cable through the walls of my house. It is terminated with standard cat6 faceplates, the cable is shielded and the shield is earthed. It ...
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1answer
757 views

How can an ethernet link pointing to a LAN go down, up, down, up… every couple of minutes?

Since yesterday evening I've had the following issue with my (home-brewn) Linux (OpenSuSE Leap 15.0) home server: One of its two on-board ethernet links keeps going down, then up, then down again,… ...
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235 views

Why does my machine only get 180Mbps on a Gigabit ethernet network?

I have a network topology similar to the diagram below: My PC was a custom build, by a company that does custom PC's. It s/has/had top of the line components for the most part. My PC would be PC 1 in ...
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0answers
54 views

Poor network throughput, but double under high cpu load

I'm trying to understand a counter-intuitive phenomenon where I get only ~ 400 Mbit/s through a gigabit connection when the CPU is idle, but ~ 850 Mbit/s when the CPU is under full load (stress test ...
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1answer
76 views

How am i getting 12Mbps speed internet on a 10baseT Ethernet?

I've opted for an internet connection of 12Mbps, I still do get both 12 up and down, but my isp has plugged a 10baseT wire and I've learned that max speed on ethernet to the base of twisted pair is ...
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1answer
243 views

Data transfer rate with Gigabit NIC and Switch over Cat-6 cable

I have 2 machines connected over Gigabit NIC with CAT-6 cable through a Gigabit switch. One machine is running Windows 10 and the other running Hyper-V Standalone Server 2016. While I was transferring ...
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1answer
232 views

Why is one of my devices getting gigabit internet speed but not the other if they both support it?

Today I got Fios gigabit internet. My desktop PC that has a MSI 970A-G43 Motherboard which I think is supposed to support up to 1000Mbps but I'm only getting around 300-400Mbps download and 600Mbps ...
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1answer
96 views

Gigabit Ethernet not working between two computers

I have two Linux PCs A and B connected: PC A (Qualcomm Atheros Killer E220x Gigabit Ethernet Controller (rev 13)) is configured for method "Shared to other computers" in the IPv4 tab of the KDE ...
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1answer
2k views

Types of Ethernet Link Modes from ethtool [closed]

What's the difference between the following link modes when we run ethtool: Supported link modes Advertised link modes Link partner advertised link modes There is a similar output from mii-tool: ...
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1answer
47 views

Mixed Gigabit And Non-Gigabit Devices

Suppose Say I have a Wifi Router which Has DHCP enabled in its LAN ports. Its LAN max Speed Is 450Mbps I have an Unmanaged Switch Which Has 5 Gigabit Ethernet Port. And I have a Desktop and a NAS ...
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1answer
161 views

5-pair UTP and Gigabit Ethernet

My house has a 5 pair twisted pair copper wire running. The cable reads "Pony 0.6mm X 5 pairs." Currently, I have a 100TX switch and I'm getting a throughput of around 70mpbs. I am considering ...
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1answer
79 views

What causes half downstream speed on gigabit interface?

I have 2 computers, one is a Win 10 desktop, the other is a Win 7 Dell laptop. Both have an Intel gigabit network interface. The internet is symmetric gigabit. On dekstop, I measure 500/900-ish speeds,...
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2answers
367 views

Can gigabit ethernet theoretically be faster than 10/100 megabit ethernet for a lot of small packets?

A software vendor I work with requires gigabit ethernet connections for a classical client-server software setup. To my surprised question why they would need to transfer such a large amount of data ...
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1answer
618 views

Slow file transfers between home server and PC over ethernet

I have an HP Proliant DL385 G5p server which I use to host a personal Debian 9 fileserver via a VM on a hypervisor. This VM has its own 1Gb/s ethernet connection to a switch of the same speed, which ...
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0answers
90 views

Cannot set speed of USB adapter

SO, I have a USB 3 to Gigabit Ethernet adapter, When I try to change speed and duplex of this interface ethtool -s eth1 speed 1000 duplex full autoneg on I get: Cannot get current device settings:...
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1answer
2k views

Performance of “Mini Gigabit Ethernet” port

I've noticed that various laptop series, such as the ThinkPad P1 series, have "Mini Gigabit Ethernet" ports instead of the standard Gigabit Ethernet ports. Are there any significant differences ...

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