Ubuntu Networking :: Recommend A Gigabit NIC Which Supports Jumbo Frames (>=9000 MTU)?
Oct 18, 2010
I am looking for a PCI Ethernet adapter which supports jumbo frames. The card I have now - Trendnet TEG_PCITXR - says it supports jumbo frames but it turns out the MTU is 7200 bytes. Yeah this is more than 1500, but it seems like a bit of a scam to me. Since it is nearly impossible to find these specs on product info pages, I was hoping someone could recommend a network card that is proven to support 9000 (or greater) MTU. Some more info, I am running Ubuntu 9.04, kernel 2.6.28-19
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Sep 8, 2010
With Mellanox 10G NICs and the MTUs set from 1600 to 9000 we have tcp sessions hanging. Executing ls during an sftp session just hangs. The same thing happens for an ssh session, if execute ls I might get few item in the directory but then the session hangs. Like wise for FTP. The Fujitsu switch is configured by default to handle jumbo frames. At 1500 MTU everything works fine. We are running the 2.6.25.14 kernel with CentOS 5.2 and the Mellanox driver.
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Mar 28, 2010
finding out if jumbo frames are supported by linux or not?
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Sep 27, 2010
I was able to build a NFS server and a NFS client using OpenSuse 11.3 and connect them together using gigabit ethernet through a switch. These are the only 2 devices on this net (192.168.1.xx). I tried to set the MTU to 9000 and 9014 but learned that the Realtek 8169/8111 only support up to about 7200 MTU. So I inserted Intel NIC cards on both and set both to 9000. The system accepts this and I can ssh from one machine to the other. Both NFS client and server start w/o issue and the client mounts the device just fine. But when I try to copy a file on the NFS client from the local disk to the server, the client just hangs and I have to physically turn the machine off in order to get it to work. Both systems are using the stock software from the DVD (I didn't update either).
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Jun 8, 2010
With what command i can check whether my Ethernet card supports gigabit speed Ethernet or not?
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May 13, 2011
How do you set the MTU on the network card for Jumbo Frames? The MTU drop drown only goes to 1500 which is far from the Jumbo frame rate of 9000. If I type 9000 in will it blow anything up?
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Oct 16, 2010
I'd like to edit a few frames from some videos, and then return them to the video stream for playback. What are the best tools to do this with?
I tried exporting a frame with Kino, editing with GIMP, and then re-inserting it into Kino, but Kino rejected the attempt.
Will Kino do this, or do I need to be using something else?
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Oct 11, 2010
i want to connect two videos into one. let's take two videos from videos as an example. i want my final video to have the height = height of first video + height of second video and width = max(width of first video, width of second video). in the upper part the first video is played whereas in the lower part the second video is played.
do you know how to do it under linux, the best possibility while using mencoder, ffmpeg or any other command line command?
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Aug 19, 2010
I wrote an application that receives packets on one interface and sends them to another interface after it added a vlan header. Both the sending and the receiving is done using raw sockets. Everything seems to work fine until I get TCP packets that are of size 1514 (MTU). Once I add a vlan header to the packet, its size becomes 1518 and when I try to send it I get the returned value -1 and errno=90 (message too long). I tried to change the MTU of the NIC to a value that is bigger than 1500 but that fails. If I create a bridge using brctl and vconfig between the NICs I can see that my NIC does sends packets of size 1518. What do I need to in order to make my NIC to send packets of size 1518?
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Aug 24, 2010
I'm running a wired gigabit card using the atl1c driver. It works fine, but I don't get gigabit, only 100 Mbps. I have a gigabit switch and other Ubuntu machines on my network are gigabit. Is there any way this could be a software/configuration issue, or is the only likely explanation that my wires are of sub-par quality somewhere?
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May 11, 2010
I recently did a clean install of Ubuntu 10.04 on my machine. It previously had windows 7 on it and everything worked flawlessly. Now the gigabit LAN connection only connects at 10Mb/s under Ubuntu. I installed a virtual machine with windows 7 and there it connects at 1Gb/s.
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Sep 8, 2010
Im looking for a pci wifi card for my media pc, I would prefer wired, but we are moving soon , so i dont want to take the time to run a wire through the house. Im looking for one that will work out of the box with Ubuntu.
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Jan 13, 2010
I recently upgraded a server's networking card to a Gigabit NIC, and got a hold of a Gigabit switch (Here's a link) in the hopes of increasing my network performance - however, I'm getting around 10 MB/s throughput now, which is exactly what I used to get with the old 10/100 switch & NIC. The new switch recognizes both computers as Gigabit (the other machine has always had a Gigabit NIC), and both computers say they're gigabit - I've found various sites around the interwebz recommending tweaking some TCP/IP buffer settings, which I have tried to no avail. I also saw that hard drive speed is usually the limiting factor. According to "hdmarp -t", the server HDD (definitely the slower of the two) is:
Code:
Timing buffered disk reads: 226 MB in 3.00 seconds = 75.26 MB/sec
So that's obviously not my issue. The cabling is CAT6 - I ran it myself, but if I'd mis-wired the end connections, wouldn't it just not work at all? I admit, I bought cheap NIC's (I'm not going for like 124.9 MB/s throughput here..), and I didn't expect them to be stellar, but I certainly expected the speeds to improve. I'm moving files from a server running Ubuntu 9.04 to a Windows machine - I've tried both my Samba shares on the server and an SFTP transfer: they both have about the same throughput.
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Feb 26, 2010
I have a HP DC-7600 with the built-in nic [3f:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5752 Gigabit Ethe
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This was the best optimisation I could get, I did follow the NFS HOWTO. Copying from my PC does not exceed 120Mbits/s (System Monitor). My PC nic does not support jumbo frames. I'm looking for any assistance to improve my network speed. My PC has 4GB RAM. I copied 74GB of average sized files between 4MB to 12MB (uh ... compressed audio) and it took 155 mins using tar:
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Apr 14, 2010
I have bought two Asus NX1101 gigabit cards for my kubuntu box and ubuntu server box. The cards are automatically detected as eth1. However the speed is set to 100mbit instead of 1gbit.
ifconfig eth1 .....
capabilities: pm bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=Sundance Technology IPG Triple-Speed Ethernet duplex=full ip=130.89.169.33 latency=64 maxlatency=10 mingnt=80 multicast=yes port=MII speed=100MB/s
resources: irq:17 ioport:ec00(size=256) memory:f7d00000-f7d000ff memory:f7c00000-f7c0ffff(prefetchable)
I noticed that both lshw and ethtool claim that the card does not support 1000mbit. So changing the speed manually with ethtool doesn't work. In windows XP the card works as it should.
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Apr 19, 2009
I'm building a new system with a Gigabyte E7AUM-DS2H micro-ATX motherboard. The onboard lan is a gigabit RTL 8211CL chip. The led on the port is orange when it is in gigabit mode and green if it's 100Mbps.When I power the machine on, the led is orange. After ubuntu loads, it goes to green. Oh, and it -is- connected to a gigabit switch. I don't know where in ubuntu to set it to stay in gigabit.Here's part of lspci:
Code:
00:0a.0 Ethernet controller: nVidia Corporation MCP79 Ethernet (rev b1)
Subsystem: Giga-byte Technology Device e000
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Mar 3, 2009
Using the onboard gigabit ethernet interface on an Asus M2N-CM DVI motherboard (nVidia chipset) with CentOS 5.2 the ethtool utility recognises that the NIC is capable of gigabit:
# ethtool eth0
Settings for eth0:
Supported ports: [ MII ]
Supported link modes: 10baseT/Half 10baseT/Full
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Feb 12, 2010
I am running CentOS 5.3.The NIC on my motherboard does not support gigabit, so I bought a gigabit network card. I installed the network card and configured it via system-config-network. Everything seems to work fine as long as I keep a cable plugged into the original NIC. The original NIC works just fine if it is the only one with a network connection, but as soon as I uplug the original NIC I can no longer ping nor connect to the server via the gigabit NIC.
The original NIC is eth0, the new NIC is eth1. Is there something I need to do to tell the system that eth0 is not required or something? I've never encountered an issue like this before...
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Sep 26, 2010
I have 2 10.04 machines connected through a switch, both with gigabit on board ethernet. Both machines show 1000 Mb/s connections.When I transfer large files (gig plus up to multi-gig) the maximum I get according to ftp 11472 kB/s.I did rough computer school math in my head and that seems low but I'll admit I know very little about network transfer rates.My question is what transfer rates should I expect to get between the 2?
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Apr 18, 2011
I'm using Ubuntu Server 10.10 64 bit and am trying to get my Atheros AR81xx gigabit ethernet controller to use 1 gbps.I have 2 ethernet controllers, one's a linksys 100 mbps (which is connected to the router which goes to the internet) and the other is the Atheros gigabit controller that is connected to a Windows desktop that has an NVIDIA gigabit ethernet controller (for faster file transfers with a gigabit connection) I've ruled out that the problem is with the desktop as I plugged the windows PC into my macbook (which has a gigabit controller), and both the macbook and desktop report a gigabit connection.
I plug the windows desktop into the server and I only get 100 mbps. I am using a Cat 6 patch cable. I've tried several methods with ethtool to force it into 1 gbps mode, but none work. I've tried using a different cable. no change. I've tried making windows force a 1 gbps connection, didn't have the option to in the driver configuration. Only 10/100 configs. the commands I've tried in ethtool
Code:
ethtool -s eth0 speed 1000
Reports no error, but no effect. I've tried forcing off auto negotiation (I had a hunch it was causing the problem)
Code:
ethtool -s eth0 speed 1000 duplex full autoneg off
I get this
Code:
Cannot set new settings: Invalid argument
not setting speed
not setting duplex
not setting autoneg
I tried each setting individually, and autoneg won't set, the others will (but not do anything)
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Jul 27, 2011
I just bought a new router with gigabit ethernet.
However, my HTPC running Ubuntu 10.04 (32 bit) with a Zotac ION mainboard can't obtain gigabit speed. I have tested the cables by connecting my laptop and it gets gigabit speed. I also have a desktop computer that obtains gigabit speed in my network, this one with another Nvidia chipset and Linux Mint 11.
I have tried to boot the HTPC with Linux Mint 11 LiveCD, but it fails to get gigabit as well. I have also tried
Code:
sudo ethtool -s eth0 speed 1000
but it does not succeed in chaingin the speed.
Is there anything I can do to get gigabit speed? I have all my files on the HTPC, so network speed is important!
Here's some info that might be useful:
Code:
christian@htpc:~$ dmesg | grep eth
[ 1.243230] forcedeth: Reverse Engineered nForce ethernet driver. Version 0.64.
[ 1.244597] forcedeth 0000:00:0a.0: PCI INT A -> Link[LMAC] -> GSI 21 (level, low) -> IRQ 21
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Mar 3, 2011
From what I can see in mii-tool I should be getting 1000Mbit link but when I transfer files I only get 100mpbs?
Code:
morrow:~# mii-tool
eth0: no link
eth1: no link
eth2: negotiated 1000baseT-HD flow-control, link ok
eth3: negotiated 1000baseT-HD flow-control, link ok
morrow:~# lshw -C Network
*-network:0 .....
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Apr 3, 2010
My kernal version is 2.6.32.10-90.fc12.i686.PAE
I'm running Fedora 12.
It auto-detected the card, but it's only operating at 100mb/s. It's connected to a gigabit switch. The driver auto-installed for the card is r8169. How do i get it up to the speed is should be at? Its kinda why i bought it...
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Apr 1, 2010
We have a Linux box which acts a a file server. Currently, files and directories are exported using NFS.At the moment, we are a bit concern on its data transfer performance. FYI, we are using a embedded Gigabit Ethernet port on the file server. We ran a few simple write tests between NFS client (also utilizes GigE port) and the NFS server. In these tests, both NFS server and client are both connected directly to each other with a Cat5E cable. Unfortunately, the write/transfer speed results are not as per our expectation. It scores roughly about 11-12MByte/s, where as theoretically Gigabit Ethernet transfer rate is able to reach up to approximately 120MByte/s.I wouldn't expect to reach the theoretical max transfer rate (it would be great if we can , but I would appreciate if you guys can share with us in terms of the following :
1) What's the practical max data transfer rate which you guys managed to observe in a normal Gigabit based connection? What about jumbo frames configuration?
2) Is there any additional tuning/configuration we need to do within the OS to reach those practical max data transfer rate figure?
3) Does PCI-e / system bus plays a role in achieving this speed? For example, we are using the embedded GigE port and we heard some people says embedded ports are actually sharing the system bus and resources with other devices, which might adds into performance issue. Correct me if I'm wrong.
4) Does converting to Cat6 cabling will guarantee an increase in the data transfer performance?
5) In the future (once we are clear on how much single GigE transfer rate we can go) , we are looking into doing bonding since that the NFS server's shared directory/volume read-write speed is way much higher (i.e 400-600MByte/s). Will bonding allow us to achieve higher NFS read/write speed? What are the bonding modes best used for this purposes? Appreciate if anybody who has experience in doing bonding for NFS can share their experience.
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Mar 3, 2010
I have been using Pound and it does exactly what I need for a simple easy dedicated load balancer machine.
Are there any other popular load balancing programs like this people can recommend? HAProxy I looked at also, not sure how good that is...
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Apr 20, 2010
I am using fedora core 2. I used the oldest version of fedora just because im running only 1 system, my specification is: HP compaq PC,pentuim4, 512mb memory, 40gig hdd, Intel board. I have two units same spec..windows xp and the other one is fedora 2. The windows xp normally detect the lan card, but when I try to fedora2, I try to active it and seems no lan card detecting,. How to detect broadcom nextreme gigabit ethernet to my fedora 2 OS???
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Feb 11, 2010
I am looking for a gigabit network card for my centos 5.4 server. I am looking for something known to work well with linux. I have been on the bestbuy site and I found a DLink (DGE-530T) card with support for linux from the vendor but after reading feedback from users with that card I am not so sure it is linux friendly. I am now thinking of buying online.
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Dec 30, 2010
We have an old Zonet 10/100 switch in our home network that locks up whenever there's a power glitch longer than about a microsecond. (OK. It's not that bad but if the lights flicker, I usually end up going down to the basement to see if the switch is hung.) None of the computers or peripherals are affected by the glitches, BTW. Power-cycle the switch and everything starts working again. After putting up with this for months I finally picked up a Netgear 8-port 10/100/1000 switch to replace the Zonet. Unfortunately, when the Netgear switch is in the network, everything slows to a crawl before completely freezing up. Pinging other systems barely worksname would not work.Pinging another system by its IP address worked a little but packet losses of 70%-80% were the best I saw. At first. Then it gets to where the loss is 100%.
All systems were rebooted after the Netgear switch was inserted into the network. The systems that were capable of gigabit connections autosensed the new switch and set their port speed accordingly. And that's about all that works when the Netgear switch is present. (The Zonet is back in the network now.)One thing I have not tried is forcing the port speed on the gigabit-capable systems to 100Mb and re-inserting the Netgear switch into the network to see if the problem if due to running some of the ports at 1000Mb.The systems on the network are running various versions of Linux (with different kernel versions, of course). Most are due for upgrades to get them current but I was planning on hitting the systems that had gigabit-capable ethernet interfaces thinking that a.) 100Mb speeds have been around forever and no problems have been seen when everything was running at 100Mb in the past and b.) the gigabit support for the older kernels should be better (one system only supports an MTA of 1500 max at 1000Mb).
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Mar 30, 2011
how to install intel 82573E gigabit on centos 5
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Dec 28, 2010
I have a following configuration: 4 PCs (say, A, B, C and D), running Ubuntu or Debian, interconnected using a gigabit switch, which is connected to the Internet. Two machines (say, A and B) also have a direct private connection between them (provided by another pair of NICs).
Now, when I test the connection performance with iperf, the results vary. The private connection between A and B performs well - about 930Mbps using iperf's UDP test. Between C and D it is about 800Mbps which I find tolerable. Packet loss when running these tests is negligible.
However, when I run iperf between any of {A,B} and {C,D}, the performance significantly drops as there is a huge number of lost packets.
For example, here is the result of testing between A and C:
Why is there such a large number of packets which are generated, but lost somewhere?
A<->B private link works fine, so system level parameters on both A and B are correct. Furthermore, C<->D works ok, so I guess I shouldn't blame the switch.
Is there a per-NIC configuration that I should check or it smells like a hw problem? Problematic NICs on both A and B are of the same type - Allied Telesyn AT2916T.
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