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Questions tagged [gigabit]

30 questions
18
votes
15 answers

Unexplained slow gigabit network speeds

Update Ok, I've tried the answers below and nothing has changed. I've identified the chipset in the laptop as the NVIDIA nForce 520. I downloaded the latest Vista x64 drivers for the nForce 520 (NVIDIA doesn't have any drivers for that chipset for…
Joshua
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9
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3 answers

Lower TCP throughput from 1Gbps server than 100Mbps server over large RTT

We've got infrastructure distributed in a few major locations around the world - Singapore, London and Los Angeles. The RTT between any two locations is over >150ms. We've recently upgraded all of the servers to use 1Gbps links (from 100Mbps). We've…
Sam
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8
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2 answers

What type of hardware is required for a Gigabit connection?

Just in case the question I am asking is unclear or hard to understand, I am basically asking whether or not the type of hardware in a machine (such as a router or server) matters when using a gigabit connection. It is already known that you will…
joeldesante
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8
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2 answers

Can I have 2Gbit over 1Gbit Nics

So this really baffles me. Apparently because 1Gbit can transmit data in both directions simultaneously it should be possible to get 2Gbit of data transfer on a single NIC (1Gbit flow seend and 1Gbit receive). People claim that because 1Gbit is…
ivenhov
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7
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3 answers

Can gigabit media converters affect performance?

We are looking to upgrade our network infrastructure. We have fiber between our IDFs and our MDF but have found fiber core switches to be significantly more expensive than copper. If we were to have a copper core switch and use media converters to…
obsidian
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6
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2 answers

Gigabit network with a 100 megabit firewall

We have set up all the equipment necessary to have a gigabit network. All servers + workstations are running gigabit cards, just bought a 16 port switch that can handle gigabit as well. My concern is now that our firewall is not up to scratch. Our…
MikeMurko
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6
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4 answers

Gigabit Network - Test

I have a very basic and newbie question. I was told that we have a "Gigabit Network". So, I ran a quick scp test by copying a file to another machine and the transfer rate is only 35MB/sec. Shouldn't the transfer rate be near the 1GB/sec? Also, is…
Carmen
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4
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6 answers

Router limits network performance but its CPU load isn't 100%

I'm using a PC Engines APU device running FreeBSD as a NAT router. The setup is very usual: one WAN connection and one LAN connection. Theoretically, WAN connection is 800/40 Mbit/s and the LAN one is 1/1 Gbit/s. In practice, the router is connected…
Ecco
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4
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5 answers

Stacking two Netgear GS748TS switches via HDMI - only 1Gbps trunk bandwidth?

I have two Netgear GS748TS 48 port gigabit stackable switches, which when stacked via two HDMI cables allow hosts on one of the switches to talk to hosts on the other. Netgear claim that the HDMI trunk allows for 10Gbps of bandwidth, but when I test…
ilumos
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3
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3 answers

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/files/1Gb.dat --2013-07-25 12:32:08-- …
cnst
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3
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3 answers

replacing an ethernet backbone with fibre optic

I live and work in a building that is nearly 20 years old. My Internet connection is in the cellar along with my servers and has a nominal rating of 100 MBit. I have a gigabit switch in the cellar connecting everything up. That gigabit switch has a…
Stephen Winnall
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3
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7 answers

Heavy bandwidth intranet

We are an animation studio and we have an intranet that constantly needs to move large files (2 GB+) around the network. We have the following config: Three Netgear 24 port unmanaged switches. Switch 1 connected to Switch 2 connected to Switch 3 and…
Andy
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3
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2 answers

How to get gigabit network speeds on Windows XP?

We've just installed gigabit switches at work, and things on the Linux side are going well. Our linux boxes, which use a Intel Corporation 82566DM-2 Gigabit nic (according to lspci), consistently get over 900 mbits/sec: iperf -c…
JB.
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2
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6 answers

information about ethernet cards

I have few question and I don't find right answers. What's the maximum speed of an Ethernet cable (not a phone cable! the one that has 8 threads) About the Gigabit Ethernet Network Card: Is it just a technology name or can reach 1 GigaBit /…
Omar Abid
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2
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5 answers

homemade open source gigabit firewall with enterprise grade

Has anyone DIYed a *BSD/Linux based firewall that can handle gigabit traffic, running reliably for years? There are quite some software solutions but is there a hardware baseline to achieve reliable gigabit firewalling? Some one at Open source…
John
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