Ubuntu Networking :: Change The Network Card Priority With Multiple Cards?
Sep 26, 2010
I've got two network card interfaces on my computer, one wireless and one wired. The wireless card is connected to the Internet and the wired is connected to the LAN. When only the wireless card is active, Internet works. As soon as i enable the second wired card, Internet stops working. And it seems like Ubuntu chooses the wired card for Internet as soon as it's enabled.
Are there any ways to solve this? So my Ubuntu box always chooses the wireless card for Internet traffic and let me use the wired device for LAN only?
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Apr 10, 2010
I've tried googling, but can't manage to figure out how to change the priority order of the sound cards in yast. From yast > hardware > sound, I can see the (default) internal audio from the motherboard, and I can see the usb headset that I would like to be using as the default. How should I go about changing the priority order on these devices?
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Jun 2, 2010
I have a strange problem regarding networking on the Alix 2d13 running Ubuntu 10.04. The Alix has 3 physical network interfaces, lspci says:
Code:
00:09.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6105M [Rhine-III] [1106:3053] (rev 96)
Kernel driver in use: via-rhine
Kernel modules: via-rhine
00:0a.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6105M [Rhine-III] [1106:3053] (rev 96)
Kernel driver in use: via-rhine
Kernel modules: via-rhine
[Code]...
It seems, if more than one cable is connected, a random hardware port is chosen as eth0-eth2. If only one cable is connected the port that is connected is chosen as eth0-eth2. Any idea what's going wrong here?
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Aug 2, 2009
I have an M-Audio Delta 44 sound card, and a USB MIDIinterface device, both are recognized, and work. My problem is as each are seen by alsa as sound cards, sometimes the alsa card numbers switch between boots. Is there a way to set these devices to always have the same card number for alsa
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Nov 22, 2010
I'm wondering a couple of things about my LAMP stacks:
1) How do I get a list of all the network cards installed in a linux box? I've run this command and it shows 2 network cards which is probably all of them:
Code:
mii-tool -v
2) How can I check the percent utilization of a given network card? I.e., at any given time, what linux command will tell me the how much of a network card's bandwidth is being consumed? I've checked both ethtool and mii-tool and I don't really see any helpful stats.
3) How can I make sure that a linux box will optimally use both network cards? I'm a bit fuzzy on how IP addresses and network cards and hostnames work together.
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Mar 14, 2010
I run an Ubuntu Server in a Virtualbox environment. Setup works fine. In virtualbox, I accidentally hit a button that generates and assigns a new mac address for the network adapter. Since then the machine does not bring eth0 up. I tried the following ifconfig eth0 down; ifconfig eth0 hw ether macaddress; ifconfig eth0 up. Then restarted networking.
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Apr 4, 2011
I would like to change wireless mode on my network card. When i type in iwconfig in terminal so i get abg I would like to have only a mode active. How do i do?
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Sep 2, 2010
I have a second network card in my ubuntu desktop that I have sharing my internet connection with a wireless router. I have set the router to a static ip address within the network cards range. But, every time I restart the computer, the network card uses a different ip address. One time it will be 10.42.43.1, the next time it will be 10.42.46.1, ect. This makes me have to hard reset my router every time it does this. How can I set the network card to use the same ip address all the time?
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May 25, 2010
I'm running ubuntu lucid and i was thinking in purchasing one or more extra wifi cards to try to configure my computer to manage different conections at the same time, with different isp's. The thing is that I'm not quite sure if what i want to do is actually possible.
The easiest way that crossed my mind was to try to configure a / multiple virtual machines that are redirected threw proxies to ubuntu and try to configure that each proxie port goes threw a different internet gateaway. This way i might be able to divide threw different sessions of JDownloader, installed on each virtual machine, the things i want to download. The negative aspect of this idea is having multiple jdownloader sessions will make my laptop work to almost 100% for sure...
Another thought i have was to make JDownloader manage its downloads in only one session redirecting them to my internet conections; the negative thing is that i think i will have to try to modify its source and learn java...
And well my last possible configuration i had in mind was to try to make ubuntu directly add up all my internet conections manage as if it was one. the negative thing here is that i might not be able to get multiple downloads from some sites
Well, all this where just thoughts, im struggling whether to buy another card or not to try to setup any of this configurations but im not really sure if any of them are actually possible. Is there an easy way to manage this?
I just want to take the most out of my internet conections... if i'm at college i have to options that are quite slow, adding them up with two cards would be great, i might also be able to add a third and a fourth conection. Also if i'm on a coffe and i need some bandwith i could try to make it go with an open network arround, etc.
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Nov 9, 2010
I'm having problems getting two wlan cards to work under Networkmanager with F12. I have an old server that I wanted to move, so thought I'd get a USB wlan device for it. before setting up the server, I thought I'd try the USB (an Edimax EW-7711USn - Ralink 2870) on my laptop first. My laptop has an inbuilt ipw2200 card that works fine under NM.
So I've down loaded the DPO_RT3370_LinuxSTA_V2.4.0.1_20100831.tgz file from Ralink, and built the driver (after changing the os/linux/config.mk file for the WPA supplicant settings). I also install the rt2870 firmware (from Ralink) in the /lib/firmware directory. I also blacklisted the rt2800usb driver to ensure that that didn't get loaded.
The problem I have is that I can now get both the ipw2200 device and the rt2870 devices 'working', but they both try to assume the same IP (I want fixed IP's and not DHCP for them) - what is the way to configure the 'devices' so that the rt2870 device is always given IP x and the ipw2200 given IP y?
I think my problem is really my lack of understanding where/how NM handles the files under the GUI config. I used to semi understand how the old network config tool set up it's files and where they were etc. But with NM I'm a bit lost as to how it equates the device with the network settings. Once I have the device working with the correct driver on my laptop, I'll look to apply the same settings on the server (which is then FC13 - but should be simpler as it doesn't have an existing wlan interface).
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Apr 3, 2011
I have two motherboards, MSI-6702 (64 bit single channel) and MSI-7511 (64 bit dual channel), I have two identical D-Link wireless cards and am running Kubuntu 10.10 on both systems. 7511 recognizes both wireless cards and connects to the Internet.The 6702 shows wireless grayed out on the connections page. The built-in Ethernet card has given out on both. I think I disabled it on the first system to have an Ethernet problem and wonder if I need to do it on the second. I would have tried it already but can' t remember how.
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Apr 12, 2010
So I am looking to modify my network cards MTU (for some testing purposes), and I only know how to do it it Windows (via command prompt ping command with special flags) and not in Ubuntu.
Any easy way to figure out proper MTU numbers in Ubuntu?
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Jul 8, 2010
I have a small pc running fedora 8 with iptables and 2 network cards for routing/firewall and secondary DNS.For some time I've been alerted by the network guys that this machine was generating some alerts. The real network IP address keeps being assigned to the other interface, intended for LAN only (10.0.0.1/24).I've already changed the PC, installed a more recent operating system, replaced the 2 network cards and the problem persists. I have another pc running the same services (except DNS) in a very simillar way and no alert logs from that one.onder if it is some configuration issue on my startup firewall script.I've also installed arpwatch and I could confirm this IP and physical address issue:
Arpwatch output:
hostname: my.host.name
ip address: my.ip.address
[code]....
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Apr 7, 2010
I have installed CentOs 5.4 for Snort sensor , on the location where i intend to place the Snort sensor to listen for internal firewall leg (LAN) the switch doesn't support port mirror so i would like to create with 2 nic's bridge and pass trough the firewall internal leg my question how do i set such configuration.
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Mar 29, 2011
I have installed slackware 13.1 64-bit version and can not recognize network cards.I'm with laptop acer aspire 7540g.Wireless card is atheros ar5b93.Ethernet card is Broadcom NetLink � Gigabit Ethernet.
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Nov 2, 2010
I've got two NICs connected to two different routers, and on different subnets of course. Each is set for static IP. But somehow I must have mixed up the connections at some point, so the NICs don't always have the IP addresses I expect. I think there may also be a mixup with different ways of setting the network addresses. When I click the Network Icon on the Desktop, I see that each NIC has both addresses as options. The /etc/network/interfaces file has some information about eth0, but all commented out, so there must be another place the addresses get set. And I just discovered that eth0 and eth1 aren't physical but virtual. I guess eth0 is the first one that is set.
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Nov 30, 2010
I'm new to Ubuntu - I've decided to give Ubuntu Studio a go as an alternative to Windows. However, after installing it, neither of my network cards work. I have a Intel Pro Wireless 3945ABG wireless card, and a Broadcom Netlink Gigabit Wired card. Neither work, And I'm not sure how to. I've tried searching, and have come up with the .tgz file here, but I have no idea what to do with it I'm concentrating on the wireless card for the moment, seeing as that will be the main one I use.
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Jan 14, 2011
I'm running xubuntu 10.04 LTS (upgraded from 8.04 LTS) on an old low power sempron machine as an always on 'internet machine' i.e. it does all my downloading email etc. and up until yesterday it has always performed flawlessly. Yesterday wasn't its fault, it was a BTI network problem that took out my internet service but while talking to tech support I realized that this machine has lost all ways to control the network cards. Network-manager and network-manager-gnome are installed according to synaptic but they have no menu or notification appearance. I've tried reinstalling them to no avail.
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Mar 27, 2011
I have installed Windows XP ,then Redhat but now when i am opening my system it automatically takes redhat . I want to change the priority to Windows XP . I want when I swich on the system it should open Windows Xp .. Is it possible to change this priority now .or I have to agin install redhat and change priority then during installation.
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Jul 5, 2010
Ok, so I've gotten tired of my router, and I've decided to make my own using IPFire as the OS. Right now I'm looking for ethernet cards that I can use for the green network, but I don't know if I can use 2 for the same network. I'm trying to get 4 ports at 1000 Mbs, and the only thing I've been able to find so far that's within my price range is a card from startech that has 2 ports, but would I be able to use 2 for the green network?
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Jan 12, 2010
I'm currently running on a really old computer with one proc and little memory. It's just enough to get skype running but it only works well enough if I change the nice level to -5 or lower. Now the person that uses skype in the house is really the wife, I don't want to teach her how to open htop in command line, fine the pid and then use the correct command to change the nice.What I am looking for is a script (sorry I don't know thing one about programming/scripting) that will change the nice priority periodically for all pid that are skype. This way call processes will get reniced as well. I know better then to run it as root/sudo, but I am at a loss (even searches came up with not much) on how to do this.
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Mar 4, 2010
Whenever I start my PC, the information of 'First Boot device' in BIOS changes from hard disk to CD-Rom. It happens with new start, I mean, if I restart my computer after resetting First boot device to hard disk, then priority does not change. Just as I switch on computer, a black screen appears with the message:
CMOS - checksum error - defaults loaded
press F1 to continue, DEL to enter setup
Recently it used to happen, that PC was not reading my hard disk containing GRUB. I have 2 hard disks. I switched the power cables of two hard disks. After that, both hard disks were shown by BIOS but the above mentioned error started appearing. Also grub takes too much time to load. It takes almost 20 seconds. Earlier I was using 'Puppy Linux'. In that, Grub was loading in fraction of second.
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Mar 1, 2009
I have a fedora 10 box with two network card on eth0 I have a pppoe connection to the internet, on second card eth1 I share my internet connection end I set up a samba server but I don't know if the settings are good. How to do this settings right to work fine, the ip are assigned by dhcp I don't use any static ip .When I try to browse the internet from the other computers some site's like {.com ; .org ; .info} are block, other site from {.ro} are working. Someone tell me something about turn off all my filters, but I don't know where to find this filter to turn it off. And when I use samba I can't have and internet access or vice versa. My network look like that:
Code:
eth0
|<--pppoe connection
|
MyComputer
(fedora 10)
|
eth1
|
switch
|
comp.1 comp.2
Win OS MacOS
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Feb 21, 2010
I have created an error logger thread in my application using pthread_create(), I want this thread to have a lower priority than my application's priority so that the application would run properly. Is there an easy way to do this? I know that we can change priority for thread created with policies FIFO or RR, since I don't set the policy for my application, I don't know what to set for my thread.
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Aug 8, 2010
I'm using two swap disks. Changing the order they are in in /etc/fstab and using "pri" in fstab doesn't have any effect. This is what it looks like /etc/fstab
#swap on other disk
UUID=90a1550c-84d6-4bde-8bc1-7c15292980f1 none swap sw,pri=-1 0 0
#swap on same disk
UUID=13b70e65-f1c3-4728-920f-9e92467d1df0 none swap sw,pri=-2 0 0
[Code]...
Its opposite of what it is in fstab, and changes to fstab have no effect.
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Jan 1, 2011
This is my lspci output.
Code:
01:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200 PRO] (rev 01)
01:00.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200 PRO] (Secondary) (rev 01)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
04:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD 3600 Series
Initially I had just teh HD 3600 in the PC, using the "AMDccle" drivers and configuration running two monitors.
I then added an old RV280 PCI card to allow a third monitor. When the PC powers on the bios output is on the RV280, once linux starts the RV280 monitor goes to the ubuntu desktop colour, the two monitors on the HD3600 get a signal (power up) and display the logon screen.
When I log on the two HD3600 screens become my desktop. If I ctrl alt f1 etc. the terminal screen comes up on the RV280 and the two HD3600 screens go blank. This suggests that all 3 monitors/ 2 graphics cards are all working ok, and ubuntu is happy with them. My problem now is to make the RV280 accessable via X/gnome at the same time as the HD3600. It would be nice to have it as a 3rd monitor on a very wide desktop, but I'd settle for it being its own little window running various tasks/programs such as mail/firefox.
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Dec 9, 2010
I have BT4 as an iso image and start it up by booting from cd, when i try the command root@bt~:startx it comes up with this fatal error. what can i do to get this work? and of course im new at this.
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Dec 14, 2010
I've been using linux for roughly 12 years now but I've always avoided linux on the desktop since touching X back in the day was quite a hassle. I recently decided that rather than keeping my windows desktop full of 15 PuTTY instances, I should rock the *nix desktop.
I started by installing Ubuntu 10.10 Desktop. It detected my two monitors handing off a pci express card just fine. I decided to install the ATI drivers when it prompted me - the proprietary drivers would let me select to use the monitors separately, but would always just default back to mirroring the screens. I was unable to get it to stop that, so I had to go back to the open source drivers. Which is fine, I don't really need the 3d accel. Roll forward a week, I ordered another video card to add another screen. I purchased another ATI card, since word on the street is that same-vendor chipsets play best together. This one had to be PCI, if this matters.
dmesg reports the new card is fine and happy, but the Monitors GUI thing doesn't detect any monitors off the new card, or report anything about it. So: what should I do to make the second video card get noticed?[URL]...
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Mar 29, 2010
I have 2 NVidia graphics cards, a GTX275 and a GT210. My system boots just fine in 32-bit Windows 7, so I know it isn't a hardware problem.Linux boots fine with either the GTX275 or the GT210 installed, but hangs after the file system check if both are installed. My motherboard has 3 pci-e slots, an x1, x4, and an x16. I've tried various configurations, all fail except 1 graphics card installed in either of these slots. I got my system to boot a couple of times with both cards installed in Xbuntu 9.10. Then this problem randomly happened.
System Specs:
Ubuntu 10.04 Beta, 2.6.32-16 Kernel
MSI N275GTX Twin-Frozr 896MB
MSI N210GT 512MB (got it for VDPAU on an HDTV )[code].....
I'm not inclined to believe the problem is here. I don't even get a bootsplash, let alone XServer to start. The system hangs after a flurry of HDD activity. Checked partition, and it's ok.
/var/log/boot.log
Code:
fsck from util-linux-ng 2.17.2
/sbin/fsck.xfs: XFS file system.
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Aug 16, 2011
I'm about to start a new build for my primary machine at home. The plan is to load up a server/workstation motherboard (ASUS KGPE-D16) with two 8-core chip, as much RAM as it will take (32GB) and to put two graphics cards in it. One to power my main 24" monitor (ideally via HDMI) and the other card to power two screens, one 24" on each left and right side via DVI (unless I can find a dual-HDMI card that meets my needs).
Does that make sense? Here's my question for this awesome group of intelligent individuals: What video card model should I choose? Obviously, I'd like them to match so I can SLI / CrossFire if I really want to, but what setup should I plan on to have a good experience managing multiple displays on multiple video cards?
Oh, and budget is probably up to about $300 per card, maybe a little more if it makes a lot of sense.I'm not alone in having tons of problems with trying to get multi monitor support in the last few versions of Ubuntu, and honestly it's the only reason why I'm still running Windows7: the multi monitor support is just SO DAMNED easy! I shouldn't have to spend this much energy thinking about video card model- it should just work, shouldn't it?
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