Networking :: Sessions Locking Using Jumbo Frames?
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.
View 3 Replies
ADVERTISEMENT
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
View 1 Replies
View Related
Mar 28, 2010
finding out if jumbo frames are supported by linux or not?
View 1 Replies
View Related
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).
View 4 Replies
View Related
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?
View 5 Replies
View Related
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?
View 3 Replies
View Related
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?
View 1 Replies
View Related
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?
View 5 Replies
View Related
Jun 29, 2010
I want to lock down my server to allow only certain ip addresses and ports in. I was thinking of doing this through the iptables but someone sugguested I used the hosts.allow and deny files to allow who can access the system. What do people suggest? If I"m trying to ensure no ip's can access my system except the ones I want, how would I do this with just the allow and deny files?
View 4 Replies
View Related
May 17, 2011
Everyday i initiated a download on my ubuntu pc and lock the screen and leave, i notice that the internet connection gets cut within 10 to 15 mins after i leave. I am connecting to internet via reliance data card - usb modem. what are the odds of my ubuntu responsible for this ?
View 1 Replies
View Related
Feb 27, 2009
I am looking at ways in which I can restrict the SSH session requests come by specific SSH client (say Putty or NX Client). Is it possible to restrict SSH client login to a client application?
View 8 Replies
View Related
Jul 1, 2010
if i stop that session, and come back later, it will have me log on at the login screen, but start a new session, with multiple instances of things..now, with vino, i could just keep the same session running, and when i VNC in, it just resumes it.. This one starts a new one.. i even tried just locking the screen, and it still starts a new one...i know there is an easy fix.. lol.. i just cannot find one.. i REALLY like how it shows me the ubuntu login on my server.. that is slick, so id like to keep that, if possible.
View 2 Replies
View Related
Aug 12, 2010
I have a mate who runs the IT in his office. He has recently set up and secured the network but now has an issue logging in to the network from home. Here is the message I got from him regarding the set up and what he is having specific issues with.
I was really pleased with the results on my Pen Test; the office itself is a pure MS environment but the testers all use Ubuntu 9.10 to hack with. The main tools of choice are Nessus and Ophcrack with a bit of NMap. It's pretty scary what you can do with just these tools. I had a Wireshark trace running all the time and it's fascinating to watch how these guys crack open a system. The only really major change I've had to implement on my network is to force the use of SSL as a transport layer for our remote desktop sessions. This has forced me to start using MS RDP Client 5.2 because it can use certificates on the session. The problem I've got now is that the Terminal Client in Ubuntu can't do this so I can't remote in from home on my Ubuntu laptop.
View 1 Replies
View Related
May 27, 2010
So I have a usb wireless adapter that I set up on my Xubuntu system, and it has been working great since. The laptop that I have Xubuntu on is kind of a POS, so I wanted to try out LXDE to see how it would fare in terms of resource usage.When logged into an LXDE session, all of the ndiswrapper settings appear to be the same, but there are no networks listed and it doesn't connect.
View 2 Replies
View Related
Aug 15, 2010
I run pidgin instant messenger via fbpanel taskbar via fluxbox window manager via xvnc vnc server via xrdp remote desktop terminal via sesman session manager.
One problem I've found is that Pidgin does not detect when I stop mousing or typing. I also run gnotime time tracker and it too is not able to detect when I don't type on the keyboard or move the mouse in my X-Windows.
Some questions:Is there a common problem? Is there a workaround? Is there a way to diagnose the problem?perhaps a program which says which window got the input which resets the idle timeout
Is there a way to examine or record the idle periods?
View 1 Replies
View Related
Apr 7, 2010
My requirement is to route ssh sessions from a single head node to multiple slave nodes. So what i want is, for a client there is just one point of entry (master/head node) to ssh into, it evaluates the load on the slave nodes connected on to internal network and routes the ssh session, kind of a ssh load balancer. Do you have any idea what open source solution i can apply for my problem?
I have tried using LVS piranha, it works well for http and https load balancing but not for ssh load balancing.
View 4 Replies
View Related
Dec 12, 2010
Server - Ubuntu 10.04.1 lts
Client - Kubuntu 10.10
When I try to open any nfs-mounted file using OpenOffice, I get a pop-up window titled "Document in Use". The text of the message is:
"Document file 'abcde.odt' is locked for editing by:
Unknown User
Open document read-only or open a copy of the document for editing." I then have three options - <Open Read-Only>, <Open Copy>, & <Cancel> If I cp any of these files from the mounted directory to my home dir (not mounted), I can open them without problem.Also, my firefox & thunderbird date are in this mounted directory as well (sym links to ~dan/.mozilla & ~dan/.thunderbird). Both of these apps hang when trying to open, leaving two processes behind that need to be manually killed. Again, cp'ing the data out of the nfs-mounted dir onto a local dir resolves the issue, so I am 100% confident there is nothing missing or corrupted in the firefox &/or thunderbird data...
relevant entry in /etc/fstab:
server:/nfs/dan/Documents /home/dan/Documents nfs defaults 0 0
relevant entry in server's /etc/exports:
/nfs/dan/Documents client(rw)
View 8 Replies
View Related
Sep 1, 2011
I am experiencing a problem with viewing 1080p movies. The frames get stuck and don't refresh, so I am left with a single image while the sound plays on fine. I find that this only occurs with high resolution movies, but I am curious as to where the problem lies and if I can fix this at all. Here are my computer's specs and configurations:
I am using Ubuntu 10.10 (didn't want to get 11.04) with 2GB or ram and 972.6MB of swap (I need to increase that to 4GB, I think? Correct me if I am wrong). I am using a Toshiba u400 Satellite which comes with a Intel X3100 Integrated Graphics chipset (don't really know the strength of this set up) and has two 1.73 GHz processors. The only thing that is within my power to change is the swap allocation. When I start the movie and bring up the System Monitor, VLC takes up almost the entire CPU usage.
View 1 Replies
View Related
Jun 19, 2010
Since I installed Ubuntu 9.10 recently and downloaded a new copy of MPlayer, a Shell execution of Mplayer of a video with the -fps switch, sees the -fps being ignored. The video in question plays the video too fast and goes out of synch with the audio. This has never been a problem as I play the video using the shell and include the -fps option to slow the video down. For instance, the command below would play the video at 30 fps:
mplayer -x 640 -y 480 -fps 30 "/media/USB2/williams.flv"
It has always worked before. What's changed in the latest mplayer, or is there something else I need to install in order to get -fps functionality? I can paste the (rather long) output mplayer gives upon execution of the above command.
View 2 Replies
View Related
Aug 10, 2010
Why would the frames and buttons disappear after a regular update. I rebooted which took back the buttons I was missing from the top=right corner of the windows but, the frames are still missing? I am using a combination of Compiz and Metacity and until now all has been working really well. I don't even have the awful window resize delay I was having.
View 3 Replies
View Related
Jun 12, 2011
Can anyone hint a program suitable for separating individual frames from a video stream?
View 2 Replies
View Related
Jul 6, 2011
window frames went awol one boot to the next.tried apt-get install -f and dpkg --configure -a as suggested elsewhere, but no joy.
View 9 Replies
View Related
Aug 7, 2011
Compiz was installed and working when I installed the 'new' ubuntu. (x86-64) What I did:installed my nvidia driver, enabled secondary screen (twinview) Installed some extra compiz plugins using aptitude. Tried to enable the desktop cube, and with that automatically disabling the desktop cube. And bang, no more window frames.. I tried with GTK window decorator and with emerald. It doesn't make any difference. Now I am running meta-city and emerald without any desktop effects.
View 2 Replies
View Related
Apr 26, 2010
I have UDP packets generated on Machine A that are addressed to Machine B (unicast) that I capture with PCAP. After transporting this raw data to Machine B (via RF modem) I'm trying to reinject the original UDP on Machine B through a tap0 interface. The capture and transport are all working fine. BUT once on the destination machine, the reinjected ethernet packets are NOT being received by a local UDP server. this is my socket creation :
Code:
outputSocket = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
struct ifreq s_ifr;
strcpy(s_ifr.ifr_name, "tap0");
"data" is an unsigned char array that contains the original packet data received from pcap, which includes the ethernet header, ip header, udp header, and payload data. after the call to write() completes, Wireshark on Machine B sees a correctly formatted (checksums and all) UDP packet when listening to tap0 - ie. no lines highlighted in red. *BUT* - a UDP server i have running on Machine B never receives the reinjected UDP datagram. (I have verified that this server works, by using a simple local udp generator app.) is there something wrong with how I'm creating the socket and/or writing the data back out to the tap0?
View 1 Replies
View Related
May 30, 2011
Since I prefer bigger than default size fonts, I am having a problem using iceweasel. Web-pages, especially frames, are not drawn properly with overlapping and hidden text. I am thinking about alternatives that may exist than can replace iceweasel.
View 14 Replies
View Related
Aug 9, 2010
I'm getting dropped frames from both Digital8 & MiniDV camcorders using Kino. MyCPU doesn't seem to be spiking. I've made sure compiz is disabled and no memory/cpu hungry apps are running. I'm using SATA drives so DMA shouldn't be the issue.
The video and audio that is captured seems to be fine.
Hardware info:
CPU - AMD 64 FX-55 Processor
Mobo - GA-K8NXP-SLI
01:07.0 FireWire (IEEE 1394): Texas Instruments TSB12LV23 IEEE-1394 Controller
01:0a.0 FireWire (IEEE 1394): Texas Instruments TSB82AA2 IEEE-1394b Link Layer Controller (rev 01)
View 1 Replies
View Related
May 3, 2011
I have Ubuntu 11.04 on a Dell Studio XPS 1640 with ATI graphics and the fglrx driver. It's a powerful machine and I've had no problem what so ever to watch full hd videos on windows 7 but all videos, no matter the resolution, has a very small stutter which is annoying but not making the videos unviewable. But I'd prefer not having it at all. I have tried setting the VLC video output to x11 but there is no difference. It's a screen tearing problem, that was fixed by setting the option "Tear Free" on in ATI Catalyst Control Center.
View 2 Replies
View Related
Jul 14, 2010
In my graduate professional writing program, I have had to make several documents that integrate graphics. In order to manage the graphics, I taught myself how to use frames. But I discovered that the Openoffice.org word processor has a problem saving the frames correctly. I save my document and close it. When I reopen it later, the graphics in some of the frames (not all) are distorted; they appear cut in half. Examining the frames, I determined that the anchors of the affected frames had changed since I saved and closed. Changing the anchors back to whatever they were restored the graphics to normal. Every time I saved and closed, this happened again. The first solution I came up with was to save with the frames set properly, and export the document as a PDF file; the frame anchor settings will not mess up for that.
Then, because I save my school documents as Word files (the university--that program, anyway--doesn't use Linux), I tried saving the document as an OpenOffice text document (.odt). That also avoided the frame anchor settings problem, meaning the problem occurs only when saving as a Word document. But since my professors probably don't use OpenOffice, I am submitting PDF documents in this situation.
View 1 Replies
View Related
Sep 19, 2010
I have downloaded a film from a commercial TV station for my own use and want to edit out all the advertising breaks. I have tried Cinelerra but I cannot find a means of deleting selected frames, I also looked at trying to use Kdenlive but cannot find a way of loading the complete film to work on so unable to tell whether it might be useful.
View 8 Replies
View Related
Jun 14, 2010
Way back from Windows 3.x days to the latest 64bit Windows 7 (classic/standard theme)there is a way to make the window edge border wider then 1 pixel.I often use 3 to 5 pixel to make it easy to grab on hi-resolutions displays and hi DPI monitors.There doesn't seem to be an easy or obvious way to do this with the Gnome X-Windowing system?
View 3 Replies
View Related
