Ubuntu Networking :: Ethernet Not Reaching Expected Speed?
Sep 13, 2010
I have been doing a variety of speed tests on my ethernet connection in preparation for upgrading my service and found that the connection on my dell d630 is not getting expected download speeds. In fact, it is getting about a third of the expected speed. This machine is running Lucid. It also dual boots Windows Vista. Checking Vista a moment ago, the speed is fine. What could be the problem that is preventing the ethernet from working at 100%?
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?
I have a server in a colocation environment where I'm allotted 25Mbps. I'd like to avoid exceeding that for obvious reasons. Is there a way I can set the link speed or at least throttle the bandwidth for all services?
I have a CentOS 5.5 machine (hosted at a remote hosting company) where "ethtool" reports that the eth0 device is currently in 10 Mbps mode, but the output indicates that it supports 100 Mbps. But if I try using ethtool to switch the device into 100 Mbps mode, it doesn't work; after running the command to switch it to 100 Mbps, ethtool reports the speed is still 10 Mbps:
[root@sls-eb5p17 network-scripts]# ethtool eth0 Settings for eth0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full
[Code]...
The man page at [URL]..ethtool seems to suggest that this should have worked. Any reason why the reported speed of the device didn't change? Changing other settings doesn't appear to work either, e.g. if I specify "duplex half" instead of "speed 100", eth0 still reports "Duplex: Full".
I am running RHEL 5.3 on a blade server w/ 2 NICs that are bonded. I have 2 VLANs that I am trying to configure. I have created the network-scripts ifcfg-bond0.<vlan#>. I can ping the device but the gateway won't ping. I am in console mode so cutting and pasting output doesn't work.
I currently have debian installed dual booting with windows 7. Whenever I go to speedtest.net I ger over 20mbs with windows 7 and .098mbs with debian and ubuntu can wnyone tell me what is going on. I called AT&T Uverse and they said that I had over 900 file sharing sessions still open and that is what was causing the problem so they reset my network gateway for me ad we tried again, same thing debian low ethernet speed windows 7 very high ethernet speed can anyone help me out with this
My laptop was working fine on wireless till the userinterface changed and it defaulted to ethernet and now it won't let me go back on wireless How do i disable ethernet?
On the computer on which I have to login, Shoreline is installed.I know I can add rule to /etc/shoreline/rules but I decided to manually enter an iptable rule by typing:
New to CentOS5.5 I'm experiencing some trouble in order to continue my configuration. I've just installed my vmware tools and configured my network card with system-config-network
Edit eth0 (eth0) - vmxnet3 -> with a static IP I rebooted my server and since then I lost my eth0. I still see it in system-config-network, but I can't active it anymore.:
/etc/init.d/network start Bringing up interface eth0: Device eth0 has different MAC address than expected, ignoring. [FAILED]
I haven't done a great deal of networking with Linux so bear with me if the solution seems obvious.I've got four machines with two Ethernet cards each; one on-board and one PCI. I'm trying to get it set up so that the PCI card is eth0, then the on-board eth1. This.. isn't going as easily as I would have thought. I expected I could just go to network configuration, switch to the "Hardware" tab... change the on-board card to be device eth1, change the PCI to be device eth0... then go to the "Devices" tab and change the nickname to match the device.
This has decidedly not worked at all. Additionally, on some of the machines that I haven't messed with, the device name for the PCI card isn't ethn, it's something like "Intelnnnnn" (some string of numbers that I don't have in front of me). Something more specific to the card I'm sure, but while I can assign that device a nickname, I can't use it.. I can ping -I Intelnnnn ip.add.re.ss, but I can't ping -I eth3 ip.add.re.ess.
Where am I going wrong here? I've looked at a few tutorials online but they look extremely more complicated (read_device_bus_id? qeth device?) than should be necessary for just what I'm trying to do
I use evolution 2.26.1 on my jaunty machine. I have a couple of gmail accounts, and use pop3 to have that mail sent to evolution on my computer. All was fine until a few days ago. Then I noticed that I was no longer getting mail from my freecycle account sent to my machine. I went to the gmail web interface and saw that freecycle mail is still being sent to me. But gmail isn't passing it along to my evolution. The odd thing is, other mail from that gmail account *is* reaching evolution okay.
I've just about reached the end of my limits wrt Skype running in a Windows 7 Guest OS on my laptop. I'm still running pure Slackware64 and avoiding multi-lib on it. I've actually never installed Wine before, I guess just because it was so buggy and didn't work very well back in 1994 or so, and I've never looked back or bothered to give it a consideration since. But I also have to fire up VirtualBox if I want to run QuickBooks or the Adobe Suite. So, my choices at this point are:
1.) continue on the same course w/no Skype under Linux
2.) install Wine and hopefully run Dreamweaver, QuickBooks, and Skype
3.) go multi-lib Slackware and then I'll have Skype (Plus a few other things).
So before I embark on setting up Wine.... Would anyone like to weigh in on what you think some of the pros and cons are for me choosing #'s 2 & 3 at this point?
I have installed OpenSuse 11.4 as a Xen guest on a host system running SLES11 and it gets stuck just as it reaches run level 3. I can ping it and various network ports are open but the virtual text console is unresponsive and I cannot ssh to the machine. Port 10080 (Amanda backup) is also open but not functioning properly. The odd thing is that this problem happened when I first installed the guest and then went away only to reappear when I rebooted after installing the latest kernel via Online Update.
Here are the last few messages on the console: Starting NFS client services: sm-notify idmapd..done Mounting network file systems ...Starting rpc.statd .....done ..done Starting sound driver..done ..done Starting irqbalance ..done Starting java.binfmt_misc ..done Setting up (remotefs) network interfaces: .....
Here are the last few messages from ssh: debug1: Authentications that can continue: publickey,keyboard-interactive,hostbased debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/bobv/.ssh/id_rsa debug1: Server accepts key: pkalg ssh-rsa blen 277 debug1: Authentication succeeded (publickey). Authenticated to stafflinux ([134.219.205.140]:22) debug1: channel 0: new [client-session] debug1: Requesting no-more-sessions@openssh.com debug1: Entering interactive session.
Note that I have set RUN_PARALLEL="no" in /etc/sysconfig/boot I have console=xvc0 as a kernel startup parameter. How I might debug this?
We have an internal application which takes below 10% cpu usage normally. However sometimes it hit above 85% or more (and stays there) causing the server to become very slow. Currently we have to monitor this manually, kill the process and manually start it.
command / script that will kill the process (using pid will be the best option as i think) when it reaches 85% or higher
(I saw another question that suggested to use monit but I have to get this done using the standard commands available in the current installation - RHEL5)
I'm noodling around with Ubuntu 10.4.1, latest updates and kernel (2.6.32.24?).Anyway, I run ClamAv as root and it goes fine through almost all of my system (huge amount of it), including several virtual devices, where it hangs on pan0, which has some association with my network (eth0 would be for wired connection, and wlan0 for wireless, and pan0 is listed also, but I'm not at that machine right now, so I can't tell why it shows up. wlan0 is what I use to connect to the internet).Is there an issue for clamAV with virtual devices? Any workaround? I had to terminate the scan after it stayed hung for over 5 minutes on pan0.
I successfully Installed nvidia graphics driver version 173.14.12 for Geforce FX5200 on Mandriva 2008 (It couldn't find a precompiled header, so built the driver against devel) .
It worked OK, everything became faster(than not having a driver) and OpenGL games were acceptable too.
Then I enabled 3D desktop effects (to it's medium level), it said it should log off, it did and restarted X server and then (autologin) Gnome didn't come. It's the screen in loading desktop, and cursor shows "working in background"(busy but shows the cursor itself too).
I'm not very interested in 3D effects, I just wanted to see how it is, now I want to know how to get it back.
I tried to go through Alt+Ctrl+F1 and close the program supposed to do 3D effects, or restart to runlevel 3 and change XF86Config but nothing seemed relative to 3D effects.
I have two Lenovo laptops: One is a T410 now running on openSUSE 11.4 with KDE 4. I got my wireless, keyboard languages/layouts, upgraded firefox... The other, a V570, is currently running Ubuntu 11.4 and I'd like to install openSUSE 11.4 on it.
Here is what I did. Downloaded openSUSE-11.4-DVD-x86_64.iso from software.opensuse.org: Download openSUSE 11.4 (Direct link). md5 checksum is good (compared to checksum posted by caf4926). Burned to DVD using Brasero. Installed openSUSE on the T410 (did the media check first from the installation menu - it was ok). Install went well and system is running fine. I'm happy with it
This is the problem I'm having; tried it about 10 times now and every time it's the same. Using the same DVD, trying to install openSUSE 11.4 on the V570 machine; after turning on, it boots from the DVD and I get the following 3 lines and then the cursor just sits at the fourth and does not continue
I had been using Xubuntu 9.10 successfully for some time. Recently, however, I tried to boot Xubuntu, and instead of reaching the login screen, a "GRUB" interface appeared. The title was "GNU GRUB VERSION 1.97~beta4"
Below that, there were a few instructions describing the use of the Tab key and a blank command line interface beginning with "sh:grub7". Before this started occurring, my computer would turn on and then display a menu to choose the OS. If I selected Xubuntu, a few lines would flash by, and the login screen would appear. My computer is a Dell XPS M1530 laptop. The operating systems installed are Windows Vista Ultimate and Xubuntu 9.10. The Xubuntu was installed using a Wubi installation.
As far as I remember, I did not make any changes that may have caused this. The only significant event that did occur was a power outage, but my computer was not plugged in nor on at this time.
If everything works normally, how would I boot Wubi Xubuntu from the GRUB interface? Are there any other solutions to this problem?
when I call a windows application with wine I cannot type anything when the application asks for it. The typed keys are displayed in the terminal instead. I use a ubuntu-based distro.
Ubuntu 64bit. The sound system works and plays noises correctly when I test the speakers in sound preferances. The internet BBCi player(Radio) plays sound correctly. Banshee & Rhythmbox try to play music files at double, or more, speed with no sound output. Spotify Linux version also tries to playback at double speed with no sound output. Media Player attempts to play music files at high speed. Media player plays the Video and audio tracks at high speed. VLC Will play the video at normal speed but with no audio.
i both have the same problem, i'm trying to burn my images at 4 or 8 speed, but ubuntu 10.04 says that the hardware does not support that kind of speed and switch up to 16 speed and more. i know it can burn at low speeds, at least in windows, it is a bit strange that fast burning is okee, and slow not, what can i do to prevent this? i don't wanna burn to much errors on my discs
I have set up squid server. My cache directory has been set up as per following statements.cache_dir ufs /Cache1/squid 10000 16 256cache_dir ufs /Cache2/squid 10000 16 256Now the problem is that size of /Cache1 and /Cache2 has reached to about 8GB and in near future it will reach the maximum limit of 10GB. I just want to know that whether I need to delete the contents of these directories or otherwise.
Im trying to make an ubuntu server box my entrypoint to my networking. Meaning itll function as a server, a firewall, and a gateway. so i already installed dhcp3 and a dns server.
I have 2 ethernet cards in it. So now i wonder, should i the second card into a router's modem/wan port and make the router a switch? or should i plug it into one of the routers lan ports?
I have a server with two ethernet ports. I configured eth0 to be static, set at 10.1.10.148. I plugged in another router into the other ethernet port in order to configure that router. I configured eth1 to use dhcp. Using /etc/network/interfaces rather than gnome network manager. When I did this, I lost internet connectivity (internet routes through eth0 of course)
- Why did I lose internet connectivity?
In order to recover internet activity, I had to disconnect the new router on eth1 of course, and do sudo ifdown eth1. That wasn't enough however. After rebooting numerous times and pulling out my hair, I finally tried configuring eth0 as dhcp, rather than static, and this fixed the problem.
- Why didn't sudo ifdown eth1 solve the problem? What information was saved between reboots that somehow remembered that I plugged in the new router? Because my thinking was if /etc/network/interfaces was identical, and the network topology was identical, after a reboot everything should be restored, but it wasn't.
I am basically wanting to use my Ubuntu 10.10 computer as a router. Note: Before you say just get a router please note that I am poor/cheap. I have two ethernet connections and one wireless connection on my netbook. I want to share the internet connection that is going into one of the ethernet cards through the other ethernet card and the wireless card.
DSL-->1sr Eth --> 2nd Eth (currently works) DSL-->1sr Eth --> Wireless Card (Adhoc) <--(connects with limited connectivity AKA no internet)
The 2nd Ethernet card already has working internet, but when I connect to the Wireless card (through an Adhoc network), it cannot get an IP (I believe).
I have a 18Mg download speed internet connection and surfing the web is supper fast, streaming video is decent, etc. when I go to download a file 100 mg or so really anything my download speed will clime to about 1.3mg and then start dropping and level off at about 32 kb or lower. if I pause and restart the download it will jump back up again for a while and then come back down. if i constantly pause and restart the file will download in roughly the same amount of time as if the connection was working properly.
I have hesitated posting this because there are a number of threads on the Asus USB N-13.First let me point out that I am using this device.It worked out of the box in Ubuntu 10.10 after several reinstalls using the native Ubuntu driver.However my speed is stuck at 54Mb/s.When tested on a Win7 machine, the connection speed is much closer to 300Mb/s.In wading through the other threads, I am unable to find anyone who has this adaptor running at N speed in Ubuntu 10.10.I have downloaded the latest ASUS driver for LInux but have not installed it as my previous attempts at doing this failed miserably and each time necessitating an OS reinstall.I am an experienced Windows user but a rank newbie when it comes to Ubuntu. The following is the result of iwconfig:chad@linuxbox:~$ iwconfig lo no wireless extensions.
eth0 no wireless extensions.
wlan0 Ralink STA ESSID:"midgard" Nickname:"RT2870STA"[code]....
