Ubuntu Networking :: Switched To Fibre Optics Killed Internet?
Jun 21, 2011
I just had the great pleasure of switching from standard DSL to BT infinity (fibre optics) which included switching my DSL Belkins router for a new cable BT home hub unfortunatly. My PS3 went online wirelessly fine, all our iPads/Pods/Phones went on ok wirelessly and 2 out of 3 wired Ubuntu 11.04 desktops went online ok. I also have a Macbook dual booting 11.04 but haven't tried it yet. The problem is my computer which is wired the same isn't working, I can get it to say connected sometimes and UbuntuOne did say it was updating a file but then cuts out, I just can't seem to get connected to the internet!
I didn't change anything from the previous day, just switched it on. The only significant difference I can think of between my computer and the other desktops is mine has the KDE desktop installed.
Things I've tried:
- Restart router
- Boot into different DE eg. normal, classic, KDE
- Unplug ethernet cable and plug it back in
- Restart computer
My computer is connected using the powerline system along with 1 of the other desktops so it can't be that, it must be something at my end.
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Jul 29, 2010
My PC is connected to an modem (DHCP) with IP 192.168.1.21 on eth0 Internet works perfectly I have installed an additional LAN card and configured it as eth1 with IP of 192.168.0.1 When I connect this LAN card to a LAN switch which in turn is connected to 6 other PCs, the internet stops working. As soon as I switch OFF the LAN switch, I am able to access internet. The IP addresses of the other PCs are configured as 192.168.0.2 etc. with gateway as 192.168.0.1 and DNS same as the DNS on the external interface. I can ping 192.168.0.1 from the LAN but neither LAN nor the main PC can access net. I was planning to Masquerade and NAT the other computers without using squid
My setup is as follows
ISP - Modem(192.168.1.1) - Ubuntu desktop 9.04(external interface eth0 192.168.1.21 & internal interface eth1 192.168.0.1) - switch - LAN (comprising of Ubtuntu 9.04, 9.10, 10.4 & XP machines with IP 192.168.0.2 - 8 and gateway of 192.168.0.1) I did NAT as per [URL]
This worked perfectly well 1 day Next day onwards whenever the LAN switch is "ON" the main Ubuntu wudnt get internet and the internet connection would work only when the LAN switch is turned "OFF". Even if all the PCs in LAN were to be switched off, the main Ubuntu would behave similarly i.e. internet would work only when switch isn't connected to it or switched off.
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Jul 28, 2010
My PC is connected to an ISP with IP 192.168.1.21 on eth0Internet works perfectlyI havenstalled an additional LAN card and configured it as eth1 with IP of 192.168.0.1When I connect this LAN card to a LAN switch which in turn is connected to 6 other PCs, the internet stops working.As soon as I switch OFF the LAN switch, I am able to access internet.The IP addresses of the other PCs are configured as 192.168.0.2 etc. with gateway as 192.168.0.1 and DNS as the ISP DNS.I can ping 192.168.0.1 from the LAN but neither LAN nor the main PC can access net.I was planning to Masquerade and NAT the other computers without using squidMy main PC runs on Ubuntu 9.04 and out of the 6PCs on LAN, 2 are on Windows XP, 1 on Ubuntu 10.4, 1 on
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Jan 30, 2010
I've been connecting to the Internet via Ubuntu 8.10 on my Toshiba laptop fine for ages now, but today it has stopped working. Yesterday an update came through relating to DHCP and, like all other updates, I installed it. And now my laptop can see the wireless router but it cannot connect to the Internet. (As I always install the recommended Ubuntu updates I didn't look closely at exactly what the update said, but I did see DHCP in the title, so this is why I suspect my connection is now broken.) Or can anyone tell me how to undo yesterday's update? I really wish now that Ubuntu had a utility similar to Windows System Restore.
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Jan 8, 2010
I have an HP mini 110. In order to get my wireless working I had to use a fix with broadcom, sadly I don't know exactly what I did to finally get it working. My problem is that in fixing my wireless, my mic died. I'm not the most advanced with Linux so I have no idea as to why this may have happened. I have seen that this is a reoccurring problem that continues to not be addressed.
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Jul 5, 2011
AMD 64 Upgrade to testing last night killed my internet connection. The lan works, I can ping the dns server from my IP, however no mail, browser possible. Is something in testing broken again?
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Nov 11, 2010
a few weeks back I got an Indian Reliance 3g dongle. I installed usb-modeswitch, plugged in and it seemed to work brilliantly in Ubuntu 10.04.The problem was it was dropping the connection every ten minutes. The logs had the error message "Terminating on signal 15".I had to unplug the dongle and then it would connect again.x the problem, I tried installing first Sakis3G and then Betawine, both of which were reported by some users to haved. Sakis said "the device did not report GSM capabilities"d no good.Installing Betawine was apparently a bad idea, as after that the dongle ceased to work with Network Manager and Betawine itself was useless. Uninstalling Betawine and re-installing usb-modeswitch did no good.Now, when I plug in the dongle, the logs say:Quote:
Nov 9 17:52:31 lauri-laptop kernel: [28563.368241] usb 5-2: new full speed USB device using uhci_hcd and address 3
Nov 9 17:52:31 lauri-laptop kernel: [28563.530547] usb 5-2: configuration #1 chosen from 1
[code]...
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Aug 13, 2011
i recently had to switch routers because my old one didnt work anymore. i have a dual boot machine with win7 for games and natty narwhal (64-bit) for everything else. i'm quite new to ubuntu, i know how to navigate the menu, change settings, install things, just the basic stuff. i dont know how to use the terminal yet except some basic commands for installing and updating software.
after my router swap, my connection for windows was back, although i had to pull out the network cable and plug it back in for this to happen. unfortunately my connection in ubuntu is still gone. i see the connection in network manager, but i cant access the internet through it. i tried setting up a new one with the same settings, to no avail. i connect to the internet directly through my router. i tried finding some documentation for it but havent had luck with that. is there some way to reset the connection? or let ubuntu set up a new one like when i'm doing a fresh install? i think that ubnuntu still thinks i'm using the old router and that this is the cause for the connection fail.
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Jul 20, 2010
A quick note for other frustrated Ubuntu users out there. I have a D-Link DWA-510 PCI wireless card (RT61) that just stopped working. After wasting hours searching posts and asking for help, I've determined that there's a problem in the latest Kernel to be rolled out.
I have now installed StartUp-Manager, and used it to boot into the old 2.6.31-22 kernel still on the machine and, hey presto, wireless is working again. It seems like the simplest fix by far.
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Feb 25, 2010
Some data:Attached because on posting I get an error even though there is not a singel image or smiley:You have included 11 images in your message. You are limited to using 8 images so please go back and correct the problem and then continue again. Images include use of smilies, the BB code [img] tag and HTML <img> tags. The use of these is all subject to them being enabled by the administrator.Couldn't upload either it gives invalid file so I resort to Google docs now [URL]
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Apr 10, 2011
My system is an Altix3000 running: (Linux sgialtix 2.4.21-sgi304r1 #1 SMP Sat Jan 29 22:43:29 PST 2005 ia64 ia64 ia64 GNU/Linux) (redhat-release=redhat-release-3AS-8.3). Which command do I use to list World Wide Name information of the QLA2300 HBA? I tried /proc/scsi and /proc/xscsi but I found nothing there.
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Feb 10, 2011
A single LUN is attached to my server with rhel5.3. The server has two Fibre channel adapters. I need to turn off one of the FC interface manuly. Which command should i use to turnoff(disable) the adapter. The settinga are the following:
#multipath -ll
test-lun (36005076801900139b800000000000150) dm-14 IBM,2145
[size=10G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=100][enabled]
\_ 2:0:11:3 sdc 8:32 [active][ready]
\_ 4:0:13:3 sdi 8:128 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 2:0:12:3 sde 8:64 [active][ready]
\_ 4:0:12:3 sdg 8:96 [active][ready]
[Code]......
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Jul 27, 2010
I'm new to this environment. I'm currently using OpenSuse 11.2 freshly installed. I'm attempting to install FCoE as a target on one box and an initiator on another. I've gone to the Open-FCoE.org site and got the tar file open-fcoe-2.6.34.tar.gz and attempted to install it, but there appear to be missing dependencies, such as libhbalinux. However, the more I seem to install, the more there are unresolved dependancies. I've followed the Open_FCoE Target and Iniator Quick Starts, but I'm running into many missing souce dependencies. What exactly I need in the way of packages, files, etc and how to install them? Is there any documentation of how to install FCoE from scratch?
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Apr 30, 2010
I am running fedora 8 on a Dell 2950 with a qlogic fibre channel card.is attached to a Dell/clarion AX100.I had a drive assigned to this server which had been working for approximately a year now.Recently during a power failure things turned ugly. Rebooting didn't fix things.I unassigned/reassigned the drive, rebooted, still no good.Funny thing when I unassigned the drive and reboot the system.still see /dev/sdb but no partitions and fdisk -l does not display /dev/sdb.I even did "echo 1 > /sys/block/sdb/device/delete"
and the device no longer showed in /dev, but after a reboot it is back.I pulled and reseated the fibre card, same
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Jul 31, 2010
SAN admin needs me to change the host port_type from an NLPort to an FPort,is[/sys /class /fc_host/host1/port_type] however i can not find anywhere to change this.the driver in question is Fusion MPT.
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Jun 8, 2011
I've been running Debian for a while, and now have the chance to do some enterprise-level experimentation. I stumbled across a very cheap EMC Clariion CX300 fibre RAID unit on eBay with 10 disks (£90!), so I snapped it up with a fibre HBA. It's not a SAN, technically a DAS in its current configuration. I'd like to know how hard it is to set up one of these as an actual disk device in Debian.I tried installing the HBA (an Agilent Tachyon XL2 PCI-X card, 32 and 64-bit modes) in my current 'live' server (a Celeron 1.2GHz-based machine), but while Debian detected it as a FC controller card, mapping the LUNs within Navisphere on the CX to the host caused nothing (obvious) to show up in the OS. From what I've read about setting up SANs (not DASs, there seems to be precious little info on setting up these), there's firmware involved with the card, and there are no references to getting a Tachyon running under Linux.
I also snagged a good deal on a PowerEdge 1850 server, but as it's the PCI-Express version, the Tachyon won't fit, so I'm considering buying a PCI-E HBA. I found a QLogic QLE2460 for a good price, but I'm hesitant to buy it, in case I still can't get Debian to see the disks. I'd most like to have the device connected to the PowerEdge instead of the Celeron machine. Have I missed a step in the configuration, or is there anything I can do to test if the system is working as it should be? The units we use at work are much simpler: set the RAIDs up, map the host LUNs and the disk shows up in Windows. I'm also sure I've set everything up correctly on the CX, as the same LUN is available to Windows. Just need to get Debian to see something on the end of the HBA!System Specs:Live Server: Celeron 1.2GHz, 512MB RAM, Intel D815EEA2 board, SATA soft-RAID hard drives, PCI Gb Ethernet and USB2.0, Agilent Tachyon XL2 PCI-X FC HBA, Debian 6.0.1PowerEdge 1850: 2x 3.2GHz Xeons, 6GB RAM, SCSI RAID disks, PCI-E riser, planned QLogic QLE2460 PCI-E HBARAID Unit: EMC Clariion CX300, 10x 146GB FC disks, 2Gbps Fibre-channel interfaceThe PowerEdge is the planned replacement for the Celeron machine, which started life as my experimentation box and became my personal live server. Storage is holding it back, so I'd love to add a further five disks to the CX and have nearly 2TB of RAID-protected storage.
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Oct 31, 2010
We have a SuSE/SLES 9 server that boots from a fibre channel card, using volumes from a NetApp filer.
We previously had the server booting from the LUNs on the filer, but after some tinkering around with the fibre channel BIOS, we have the situation where the LUNS seem to be mounted, the OS boots, starts to initialise everything but then stalls, saying:
We have tried loads of combinations of settings in the BIOS and fibre channel BIOS without any success or any idea what may have caused the error.
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Apr 4, 2011
I am running 10.10 on an older HP Pavilion. A couple of times I've noticed that this PC is switched off as if the machine was shut down. But I haven't done it.
With windows there is a known problem if automatic updates is turned on that machine will switch off after updates are applied. Does Ubuntu have such a problem too?
Also- is there some log file I might could look at to see what caused the shutdown?
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Jan 22, 2010
I find myself in unfamiliar territory. I am attempting to get a Dell M610 (in an M100e) running Ubuntu 9.1 64bit to talk to a Dell EMC Fibre Channel Array. The Dell has an Emulex card in it and it appears that the driver is loaded OK. What I am not sure on is what to do next! I have the SAN end configured but how do I get my LUN mounted on Ubuntu ?
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Jul 20, 2010
I just installed the XFCE4 desktop environment after installing 'menu'. I then logged out and logged back in after changing session to XFCE. My question is weather or not my installation and configuration of TOR and Polipo are going to work the same within this environment? Am I going to have to reconfigure? Or is this just a change in how the desktop environment is handled within Ubuntu?
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Sep 24, 2010
I installed the latest KDE desktop on my Ubuntu 10.04 system. When I switched to KDE the screen ends up black with no access to anything. I reboot but don't have access to the session manager on the ubuntu login screen so I can't get back into my Ubuntu desktop. What can I do?Embarrasingly, I had to log on via Windows 7 (its a dual boot setup) to gain access to the Ubuntu Forums
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Apr 28, 2011
i just installed ubuntu 11.04 (not beta) and switched to classic mode since it is really slow for some reason.i tried to go in update manager to see if it might fix it,but there arent any new updates.i also checked additional drivers which showed up nothing.when i had 10.10 it was quick and responsive,but 11.04 just makes me want to go back to the old version.can this be a video driver problem that its going slow?
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Mar 5, 2010
So I installed xubuntu-desktop and have been using XFCE as my desktop and everything's groovy except for one thing.
In Gnome, I created a certificate in order to allow me to login to my web host over SSH without requiring the SSH password (which is very long and complex, for good reason). It worked fine under Gnome but now in XFCE when I attempt to SSH to the server, my keyring password is not recognized.
Code:
andrew@guardian:~$ ssh <hostname of server>
Enter passphrase for key '/home/user/.ssh/id_dsa':
Enter passphrase for key '/home/user/.ssh/id_dsa':
Enter passphrase for key '/home/user/.ssh/id_dsa':
*****@*******.net's password:
(Note: I redacted the server name and username.)
A few weeks before switching to XFCE I changed my local username from user to andrew, which is why my home directory is called user, but it didn't break the keyring in Gnome.
How can I fix this? The certificate still works properly in PuTTY under Windows, so it's not the cert.
Edit: Using (X)Ubuntu Karmic.
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Jun 13, 2011
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Jun 11, 2011
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What's the best way to get this stuff back to normal?
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May 12, 2010
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[Code]...
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Aug 19, 2011
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Apr 21, 2011
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Jul 25, 2010
When I am installing texlive software suddenly power is switched off in the middle. Then onwards I am unable to update the system. And I tried to remove texlive but The error coming as texlive is not installed.
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