Questions tagged [gigabit-ethernet]

Ethernet at 1000 Mb/s (1 Gb/s). Can be over copper or fiber. There are different types of fiber.

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Will devices with different auto negotiation settings on switch ports with matching auto negotiation settings communication issues between them?

I ran across this idea today and had conflicting opinions on this from various co-workers. I am trying to understand if the communicating devices' auto negotiation settings need to match each other ...
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How to view current PHY master-slave settings in Linux (Centos Stream)

I am trying to view the current master-slave settings on my network cards (HPs with Intel controllers). I see ethtool has the master-slave option to set the mode, but I didn't see how to view the ...
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What Ethernet twisted pair cable is best with a particular Ethernet switch

tl;dr I want the appropriate Ethernet cable for my Ethernet switch. How do I correlate Ethernet cabling speeds measured in hertz with an Ethernet switch "speed" measured in bits-per-second ...
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Why do some VPN clients slow down the network connection even when they are not it use?

I work as an I.T. consultant, and I often have to install various VPN clients on my computer in order to connect to customer's networks; beginning in March 2020, I started always working from home for ...
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Video streaming via UDP on gigabit ethernet = packet lost

We are observing a strange behavior on a video streaming application over UDP on the same LAN. The sender send an H264 video via UDP through ethernet configured as 1000BaseT-FD, the receiver receive ...
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Traffic cost calculation data center?

Let's say I have a software technology (new HTTP compression, new codec, ...) that can reduce network traffic by X%. I would now like to license / sell this technology to certain cloud providers. As ...
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Local ethernet file transfers slower than internet downloads

I have an SSD drive connected to my router's USB 3.0 port. My computer is connected to the routeur directly through ethernet (no switch) and runs Windows 10. When downloading files from the internet ...
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How to Install (nic) drivers on TrueNAS

How can one update a network card driver on TrueNAS 12.0? My nic is on the motherboard directly it's a Intel Motherboard DH55HC, the NIC is 82578DC gigabit enabled. I've found the driver directly at ...
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Access point Netgear WAX610 Ethernet not working at 2.5Gbps

I've just bought a Netgear WAX610 (https://www.netgear.com/support/product/wax610.aspx) access point. Though it is advertised as coming with a 2.5Gbps Ethernet port, the port actually is working only ...
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Use "bad Ethernet frame counter" to debug Cat7 wiring issues

This question is about cabling quality problems in a Cat7 (10Gbps) network installation in an industrial environment, where fiddly M12 x-coded 8-pin connectors are used. In some cases, we are also ...
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Analyzing an ethernet cable for low negotiating speed

I'd like to find out why my cat 6a refuses to negotiate 1000 speed. I have a 15 meter long U/FTP CCS cat 6a Ethernet cable installation. I have analysed the cable with a multimeter and each strand (...
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High ping latency over direct Gigabit Ethernet link on Enterprise-class hardware

FINAL EDIT 7/7 Multiple cable, port, and device substitutions have narrowed this to the Comcast modem, and on all 8 of its Ethernet ports. Given, as the comments say, this is a closed device, and ...
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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 & ...
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2 votes
1 answer
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Load balancing multiple NICs on single machine presenting a virtual IP

I've inherited a network setup, where the NFS/Samba linux RAID server ("Ubuntu 14.04.5 LTS") is serving everything over one NIC. As a result, the 1Gb network bandwidth is saturated. Unfortunately, ...
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How is the Ethernet payload only max 1500, while I can ping with larger size packet?

Just recently I came to know that the payload of Ethernet is max 1500 bytes (mtu). The first thing that came to my mind was that we can ping with much more size than that. So I thought maybe the ...
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Had cat5e cable and got 1000mbps, upgraded segment of it to cat6, now limited to 100mbps [closed]

I have a setup in my home that goes something like this: [cable modem] -> [Netgear Gigabit switch UPSTAIRS] -> [Netgear Gigabit Switch DOWNSTAIRS] -> [Netgear Gigabit Switch OFFICE] -> [My PC] Now, ...
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Can a 24V 1Gbps Ethernet port start operating in 100Mbps mode if it was exposed to 48V PoE?

I have heard that a situation where a 24V Gbit Ethernet port was not completely fried after being exposed to 48V current, but downgraded to fast Ethernet - 100Mbps. Question: I that possible and ...
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DHCP not working on RTL8111 NIC (DHCP Offer not arriving at receiver)

I'm experiencing some strange behaviour with a Dual Gigabit Ethernet NIC; I've setup a computer which has multiple network interfaces to connect some industrial cameras and setup a DHCP Server (isc-...
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Ethernet switch with Infiniband uplink

There are Ethernet switches (copper based, i.e. with RJ45 sockets) that have Fibre uplink. Example: Netgear GS110TP Are there any such switches with Infiniband uplinks? If not then why?
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Why does my Realtek gigabit NIC not advertise 1000Mbit mode?

I currently have a NAS (openmediavault based on debian) with a Realtek gigabit NIC (ASRock Q1900-ITX on-board LAN), but it won't advertise that it is gigabit-capable. ethtool eth0 gives the following ...
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Bringing alive a I350 Gigabit network connection for Dell PowerEdge on Ubuntu using iDRAC

[Resolved]: The network cable had been connected to the integrated NIC physical interface, which although accessible, was no longer enabled. The problem was solved by connecting the cable to the ...
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Only one link comes up on dual PCIe 10-Gigabit card

Background A server running Ubuntu 16.04 Dell X520 (based on Intel's 82599) is connected via PCIe ixgbe driver was installed from here and comes up at boot Issue The card is recognized by the ...
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2 votes
2 answers
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One switch port suddenly no longer at gigabit speed

I've got this manageable switch : https://www.amazon.com/TP-Link-Ethernet-Sheilded-Replacement-TL-SG108E/dp/B00K4DS5KU/ in my network for about 3 months now. Yesterday I noticed that a computer ...
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How to enable ethernet 1 Gigabit advertising or troubleshoot the situation?

On an Debian Stretch box, I have a Gigabit ethernet network adapter, but this mode is not active (however displayed as supported). Does this depend on the peripheral condition (i.e. cable is not ...
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How to differentiate GE, Optic and FC adapter/SFP?

I'm going through old switches laying around and find myself troubled by all the different connection types the PCI adapters and their SFP have. I found a 10GE (gigabit ethernet?) SFP that says it's ...
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1000Mbps RGMII and 100Mbps PHY

An ARM SoC (Amlogic S905) indicates that the ethernet is 1000Mbps RGMII and 100Mbps PHY. Does that mean that the communication with the physical layer is slow?
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3 votes
2 answers
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What is bottlenecking my SMB share?

I set up a SMB/CIFS share on my FreeNAS box (Xeon E3-1220v5, 8GB DDR4 RAM) and I noticed that transfer rates are limited to ~70 MB/s, while I can easily get around 110 MB/s via WebDAV and using iperf ...
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Ethernet Router, switch and network routes [closed]

Say I have the following network setup with about 100 clients connected: 1 GbE Ethernet/Internet -> GbE Router -> 1 GbE Ethernet -> GbE Switch -> Clients Clients receive their IP:s from the router's ...
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Would an extra gigabit ethernet card improve server performance [duplicate]

my setup is the following: TP-Link TL-ER5120 Gigabit Load Balance Router The router has 2 WANs and 3 LANs connected to it: LAN 1 Cable goes to a TP-Link SG-1024 Gigabit Switch (24 gigabit ports) ...
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How did 10gbe happen without increasing the number of wires in the cable? [closed]

The ethernet cable speed jump from 100Mb/s to 1Gb/s was possible because all of the wires were put to use in a patch cable. The jump from 1Gb/s to 10Gb/s required no such increase. How did they do ...
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Ethernet cable lengths

I was recently installing some servers, and making the cables the right length so that everything in the rack was tidy. 2 out of quite a few links failed to operate at gigabit, degrading to 100mb. ...
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2 votes
2 answers
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Can FOG and/ or WDS do multicast over an ordinary unmanaged Gigabit Switch? or does it need hardware with specific multicast features?

Can FOG and/ or WDS do multicast over an ordinary unmanaged Gigabit Switch? or does it need hardware with specific multicast features? Trying to help a small non profit in Asia with a poor budget. ...
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Ethernet cord not detecting in centos 7

Please help me out, the ethernet modules all are loaded but i could not find remaining the two ethernet ... [root@vpn ~]# lspci | grep -i ethernet 01:01.0 Ethernet controller: VIA Technologies, Inc. ...
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Throughput dropped when using two ethernet ports simultaneosly

I have a board based on Altera Cyclone V, its ARM SoC is clocked at 800MHz, the boardd has two 1Gbit/s ethernet ports. When I benchmarked the throughput of a single port using iPerf, I managed to get ...
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2 answers
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gigabit cat6 cable connecting 100Mbps only (Electrical interference?)

I have a gigabit switch and I am connecting my laptop to it using a cat6 ethernet cable. The problem is it is connecting to 100Mbps only instead of 1Gbps. This is what i found : The is a zone in ...
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Slow gigabit speeds with Ookla speedtest software

We have 2 speedtest servers (RHEL 6.7) sitting on 10GB links with a 10GB pipe between the two. The servers are separated geographically by about 256 miles but traceroutes look very good, with 4 hops ...
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16 votes
5 answers
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How many network switches can I daisy chain together [duplicate]

We have a number of custom computer systems that need to be networked and temporarily installed around a football stadium - each computer has it's own network switch. These computers all need to be ...
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Cisco 1000BaseT SFP modules in a 3750 overheating

I have a 3750 responsible for switching in my DMZ. Every once in a while one of the gigabit links will go down although ios and the server attached to it report the link is up (activity lights, etc). ...
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How to connect a SATA / ESATA / USB 3.0 device over Gigabit Ethernet

I am looking for a way to connect an 5.25 SATA removable drive bay from CRU to our HP Proliant 360 blade server. Unfortunately the server has no support for USB 3.0 and no free PCI slot to upgrade USB ...
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Multilayer LACP

I have a network switch that is limited to 2x1Gb/s LACP teaming, however have a file server with a 4x1Gb/s network interface. What options do I have to aggregate all available bandwidth without ...
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Can a faulty switch connected to the core switch block an entire network?

I encountered the following situation: The network I administer was blocked, and this was traced down to a specific rack, after I reseted both switches, everything worked. I supposed it was the core ...
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3 votes
1 answer
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How do I increase the ring parameters for a NIC on a Linux server

I used the ethtool utility to increase the rx and tx values for the NIC on one of our servers. I ran the following command: ethtool -g eth0 Ring parameters for eth0: Pre-set maximums: RX: ...
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3 votes
1 answer
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Any benefit and/or risk in enabling Jumbo Frames for the DAG replication network?

Exchange 2013 DAG, two nodes, a dedicated GBE network interface on each server for replication traffic, connected to a GBE switch, using a dedicated VLAN. Is there any benefit to Exchange replication ...
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Slow local area network speeds

Updated on 2014-10-09 Disclaimer This question is similar to Unexplained slow gigabit network speeds but because the latter is still unanswered after 5 years, and that I think I'm able to add more ...
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Connect access switches to router or core switch

My workplace consists of 4 access unmanaged network switches from three different computer rooms connected to a router. The router contains three 100mbps ethernet ports and one Gigabit (GigE) port. ...
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Is it possible to tell whether I am connecting to fast or gigabit ethernet with CAT5e cable?

My NIC supports gigabit ethernet: $ ethtool eth0 Settings for eth0: Supported ports: [ MII ] Supported link modes: 10baseT/Half 10baseT/Full ...
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Does 1 Gbps ethernet standard mean 1 Gb in both directions simultaneously, or 500 Mb in each direction? [closed]

What does the Ethernet standard dictate for the meaning of 1 Gb ethernet? Does it dictate full duplex 1 Gbps, or a shared pipe between the two directions?
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6 votes
3 answers
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Gigabit uplink versus regular switch port

I have a 10/100/1000 24-port + 2 mini-GBIC ports switch which I have to link to other switches. Unfortunately, on the other switch all the mini-GBIC slots are taken up, so all I can do is link them ...
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Ethernet switch signal quality

Is there a (significant) signal quality difference between ethernet switches? n other words: A 1000base-t, do some switches allow longer cable runs than other switches?
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Ethernet to Fiber Converters, reliable? or maybe better solutions

Not sure if this is relevant to ask here ... but I cannot find any information on the net about it. But here goes: Today I have a fiber that comes into building B from A(I have no control here. Lets ...
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