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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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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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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How to change the setting for a network device reported by ethtool, specifically Speed, on VM?
This is related to these two questions, although they don't answer my question.
The machines are RHEL6.
1.ethtool not showing all the properties
2.changing network speed to 1000Mb/s
Output on VM:
...
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Broadcast stop via loopback kills bandwidth
Why does creating a broadcast storm by directly connecting two ports on a switch cause the bandwidth to all the other ports to cease?
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Why are we having problems with multiple nics in office and production networks going to 100mbps mode?
updates and additional info
2 environments, office and production at datacenter
Both environments have Cat-5e cables, a cable was replaced when it tested as bad with Broadcom's cable testing, and ...
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Viability of Mac OS X 10.9 Time Machine Server in office environment
Currently we have about 20 Mac OS 10.9 MacBook Pros (almost all with SSDs) backing up to individual USB drives. I'd like to consolidate these to one drobo thunderbolt drive array attached to a Mac ...
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1GB dedicated port
I'm in the process of selecting a dedicated host for a big data project deployment. I need my servers to be well connected with each other.
One of the provider I'm investigating is serverloft.
Here is ...
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Ethernet port not detected
I just added additional 1gb port to my existing 4gbs on my server. All 4 are placed on a NET CARD PCIE 1GB E1G44HTBLK 904223 INTEL
and the additional one is connected to motherboard(S5520SC) ...
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Why single file transfer is not faster than 50MB/s over Gigabit LAN?
I ran some tests on our gigabit network.
When I transfer a big file (10GB) from a windows 7 computer to another, the troughtput never exceed 50Mb (it start at 80MB/s for one second then slows down to ...
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Testing network connectivity on a server with Gigabit Ethernet
I have a box with Gigabit Ethernet, and I'm unable to get past about 200Mbps or 250Mbps in my download tests.
I do the tests like this:
% wget -6 -O /dev/null --progress=dot:mega http://proof.ovh.ca/...
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Maximum throughput on switch with different link speeds
While doing some benchmarking on a network app I discovered strange behavior that involves 100MBit and 1GBit ethernet clients connected through a switch (at-gs900/8e).
I have one server (Gbit) and ...
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TIA 568A vs. B Wiring for Long Ethernet Run
I have a long Ethernet run (about 280 ft/85 m) that goes through a conduit between two buildings. On each end, I have an APC Ethernet surge protector that is grounded to the main ground for each ...
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Poor performance when migrated Fast Ethernet to Gigabit network
I have very strange problem. In a office computer network with about 100 PCs with mixed Windows XP SP3, Windows 7 and some Windows Server 2008 R2, I've decided to upgrade the network from Fast ...
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Gbps to 2 100Mbps clients
If I have a media server with a gigabit NIC connected to two 100Mbps xboxes on a gigabit switch, will both receive from it at 100Mbps or will one connection put the server's NIC in a 100Mbps mode and ...
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Debian Dmesg Error - What does this output mean regarding an outage on eth1?
The tale of the NIC that quit;
I have chucked the end of dmesg output from a server into pastebin;
This server (PowerEdge 1850) has two NICs, eth0 and eth1. eth1 has a couple of VLANs defined on it, ...
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ethernet cable is connected but It shows unplugged [closed]
I told datacenter too connect two of my servers with a crossover cable to each other. But when I try this command
ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported ...
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What is a reasonable latency time for mpdringtest with gigabit ethernet?
Hi I have a small test network that I'm using to do some number crunching for my dissertation. My network consists of three machines with intel gigabit network cards (all em drivers with two hosts ...
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How do I calculate the ethernet NIC-to-NIC time to send a MTU packet (1500 bytes)? (OS-excluded) [closed]
I understand it will depend on the speed of the ethernet 10 Mbit to 100 Gbit. Given an ethernet speed, how do I calculate the time spend in the wire from NIC-to-NIC? I am assuming here that the ...
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Issue with Netgear GS108T Managed Switch and Jumbo Frames
I recently purchased a Netgear GS108T managed switch and I am trying to configure jumbo packets between my NAS (Thecus N4100Pro), PC and managed switch. I should mention the fact that I was able to ...
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Cisco sg100-08 connections
I have multiple computers, some have a 10/100 ethernet adapter while others have a 10/100/1000 ones. If I connect them together with the Cisco sg100-08 switch, do I keep the 1Gbit speed where possible ...
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Why cant I transfer files from my desktop to my server at full speed?
I have a desktop computer with two SSD's in RAID 0 with a read/write speed of 950 MB/sec (7.6 Gbps) and I have a server with 6 HDD's in RAID 5 (read/write speeds of 200 MB/sec or 1.6 Gbps) acting as a ...
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Do Gigabit ethernet single-mode fiber network adapters exist?
I am attempting to set up a server with a total of four single-mode fiber ports - two need to be at least 1Gb and two must be 10Gb. I have found a variety of 10Gb single-mode fiber network adapters (...
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Long Gigabit Ethernet Run
I am trying to get an Gig-E network between two buildings that are approximately 260 ft. away. While some TRENDnet switches failed to be able to connect to each other over Cat 6 at that distance, two ...
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Gigabit Ethernet on 200 mbit/s speed - why?
Today I tried to connect two laptop computers, both having Gigabit Ethernet NICs, both with Windows 7, with straight cable cat 5e. The cable is ca 50 cm long so the category 5e should be enough.
I've ...
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What am I misunderstanding about calculating MTU?
Okay, I just finished resolving a jumbo frames issue between a few Xserves, a Netgear GSM7224, and a Drobo B800i. It turned out that the Xserves (Mac OS X 10.6.8 Server) and the Drobo B800i accept the ...
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Is 1000 Base SX fiber multimode (850nm) backwards compatible with 100 Base Sx fiber multimode (850nm)?
Is 1000 Base SX fiber multimode (850nm) interface backwards compatible with 100 Base Sx fiber multimode (850nm) interface?
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Max distance for cat5e in 1000Mbps / 1 Gigabit
What is the max distance for cat5e cables in 1000Mbps (1 Gigabit) Full Duplex mode?
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'Gigabit' Ethernet Port Tester? [closed]
A quick google search shows there seems to only exist handheld testers for 10/100 Ethernet ports. Any ideas why that is and where we could find one that works with a Gigabit LAN? Perhaps the 10/100 ...
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Performance issues with self-built NAS
I set up a little NAS system for my personal use. It's an Ubuntu system running on a fan-less Atom-powered mini ATX mainboard which I extended with a usb3 pci card to get best possible performance for ...
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What could cause two devices to refuse to link?
This is a curious case where all the devices at hand will link with one another, except for two that just won't detect one another. One device is a single board computer (SBC) with a gigabit nic, the ...
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Is it possible/likely for a faulty network card (gigabit ethernet) to crash your consumer-grade router?
After much messing around with what appeared to be 4 faulty routers in a row I realized that I can reproduce causing my DLINK DIR-655 router to freeze up and require a hard reboot (to factory ...
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PCI Extender and 1GB Ethernet Performance
One of my server has 2 PCI slots which has already plugged with 1GB Ethernet cards. I want to add two more 1GB NIC to this server. I've found on ebay this pci extender.
I want to ask, because I didn'...
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1000 Mbit/s fiber switch to 100 Mbit/s fiber switch - no communication
This morning, I troubleshooted a fiber connection between two switches in the same building. It was a single-mode fiber. I knew this fiber was fine, because I had installed it myself and tested (with ...
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Can't set up NIC to establish Gigabit link on Linux
I have Ubuntu 11.10 64 bits with one (actually two, but only one is connected) Intel 82578 Gigabit Network Card which is working on 100 Mbps and I want it to work on 1000 Mbps, but I can't. How can I ...
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2 NIC's are not loading by the Ubuntu Server
I have a Server with 5 NIC's.
And I have just installed Ubuntu Server 11.10 64 bit fully dist-upgraded by now (31 Jan)
3 NIC's are identical PCI-Express x4 adapters.
1 is integrated TG3
and the last ...
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Having an issue trying to get Gigabit speed across my network (Ubuntu Server)
I've just started looking into the network speeds at my office, the entire network is setup to be "Gigabit". This includes Gb switches, Gb Network cards and Cat 5e cabling.
I'm not expecting the full ...
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ZFS and FreeNAS Performance
I have just set up an HP Micro Server N40L as a FreeNAS with 4 2tb drives in a RAIDZ. I am getting around 30-40MB/sec, with occasional bursts of 50MB/sec., reads and writes that are similar to the low ...
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Cascading gigabit switch (10/100/1000) with fast ethernet switch (10/100)
I'm a newbie in networking. I have this question in mind lately. I bought a gigabit switch and tried to cascade it with my existing fast ethernet router and switch. I have 1 server which is connected ...
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Recommend a nice managed Top Of Rack switch for Linux Computer Cluster (but it has to be cheap!) [closed]
I work at an industrial research lab, and we have a research group that's building up a Linux-based compute cluster. The have about 46 nodes so far, with more to come. They came to us a few months ago ...
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Disable gigabit ethernet throttling?
I've got two windows PCs connected by gigabit ethernet.
When I use iperf to measure throughput it maxes out at a good 100MBit/s.
When I run iperf using two or three parallel connections, each will ...
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Web server to DB server connection speed [closed]
we are designing a cluster of 2xnginx, 2xapache, 2xmemcache, 2xmysql servers for a high traffic web site.
Current web site runs on 1 dedicated web server and 1 dedicated db server.
the current web ...
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iSCSI Transfer Rate Using Standard Gigabit Networking
We just purchased a dell storage server with (12) 7200 RPM SATA drives running RAID 10 and (4) gigabit network interface cards. Additionally it has a PERC H700 controller card with 512MB of on-board ...
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Cisco 3750 Gigabit ports
I'm looking for Cisco switches that provide 48 Gigabit ports.
I've been through this list : CISCO PRODUCT REFERENCE and this one: DETAIL 3750 SWITCHES
But there's something I don't understand:
...
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Best practice to trunk two GB switches?
I already read some similar questions but I still have no clue on how to do it the right way. I have a D-Link DGS-1248T 48 port GB-switch with 4 mini GBIC ports and I want to connect it to another ...
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Link Aggregation And Jumbo Frames configured but not working
I have a netgear GS110TP smart POE switch which is connected to a dual port INTEL PRO/1000PT with static link aggregation configured on the switch and PC side.
The network card and switch recognize ...
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What is theoretical maximum of TCP traffic over GigaEthernet?
What is theoretical maximum of TCP traffic over GigaEthernet ?
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Slow network transfer on gigabit between Win7 and Ubuntu Samba (26 MB/s)
I have slow network transfer speed (26 MB/s). The beginning of the transfer started at 120 MB/s and dropped down every second.
I am transferring a 350 GB file from an E-Sata (7200rpm) drive mounted ...
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Managed switch, what is the purpose of the two gigabit ports?
We have a managed switch that has been installed by phone engineers as part of our new IP phone system.
The switch in question is a Nortel 2550T-PWR
Ethernet Routing Switch 2550T-PWR with 24 10/...
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