Networking :: Connectivity Stops On Fc12?
Jun 9, 2010
I am installing fc12 in a datacenter that does not yet support fc12. I have fc12 successfully running on several other machines in a different unmanaged datacenter. Here is my problem. After booting the machine I run a data transfer intensive operation. I use scp to transfer a 1GB file. After some percentage, 10 to 30, the network appears to go away. No ping, ssh, traceroute, etc are successful (in or out). At the KVM console I can check the status of the network service, it indicates its up. Restarting network, turning off iptables, ifdown/ifup do not have any effect. Only a system reboot will temporarily allow network connectionifconfig show LOTS of RX errors and dropped packets.
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Feb 20, 2010
It has come to my attention that if my laptop's screen (not the computer itself) is put to sleep, then connectivity stops until it is woken up again. This is very annoying! how to prevent this / how to work out
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Jun 25, 2011
Wife's laptop has AR5001 Wireless Adapter laptop model is Toshiba Satellite A215
Problem : Wireless networking randomly loses connectivity and can not regain connectivity, the only apparent solution is a full power down , this is not even certain to work. The card works under Windows, she hates Windows. (I love her for this) I know it's not faulty hardware , because it will work for days on end under Windows without problems.
Things I've tried : madwifi drivers (any and all versions available) : These increase stability of the signal and seem to delay the inevitable however it still happens. When using these drivers the only option is to unload them modprobe -r then reboot then remove them again and re add them. It makes no sense why this works, and if I don't remove them prior to rebooting it will not work.
ATH5K drivers : These are pretty much junk, results are unpredictable at best, sometimes it will work perfectly for a few hours, sometimes it will not work at all. Nothing is repeatable, I can't seem to force whatever condition is causing this. rfkill does not show the wifi being blocked (hard or soft), unblocking it anyway does nothing, only way to make this work and it's iffy is to fully power down wait 5-10 minutes turn it back on and it MAY decide to work.
Firmware update : Updated the Toshiba BIOS to the latest version of the firmware 2.0 no joy here either. Same issue both sets of drivers.
Tried different distros and kernels : I've tried Mint 9, 10 ,11 ; Ubuntu 10.10, 10.04 , 9.10 and 11.04 (which is currently installed) , Fedora and OpenSUSE. All are giving the same problems. I have also tried a slew of different kernels no joy from any of them (I'm not at the computer with the issue now I will post exactly what kernel versions I've used when I have access to the machine).
Another useful bit of information, the hard switch to disable/enable wifi WILL disable it but turning it back on does absolutely nothing. The hotkey does nothing at all. The bios does not have an option to disable or enable the wireless card.
I will also post the typical lsmod , lspci , iwconfig all that good stuff when I get back to the computer in question. I'm probably just going to buy a PC card for it and give up on that one, but this is driving me insane and I would really like to see it resolved even if I do replace the hardware.
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Nov 13, 2010
I'm running Ubuntu 10.10 Maverick Meerkat 64-bit on my desktop with a wired internet connection (with no firewall). For the past 2 days, I have observed that1. Firefox randomly throws up errors like "Problem loading page" whenever I click on a hyperlink. When I click on Reload, the page loads up just fine. This has been happening a lot recently..and I do not remember updating anything consciously. By the way, ipv6 is disabled in Firefox.2. The network stops working all of a sudden (usually indicated by the Firefox error). The Autho Eth0 indication is active, but I am unable to connect to any external machine.
3. Needless to say, this error is manifesting itself in apt-get as well. I get "something wicked happened" errors all the time, and am unable to download or install anything.That this is not a problem with the ISP is obvious because I also have Windows (from which I'm typing this, ironically), which is able to access the internet.Is this a bug in Ubuntu 10.10?
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Apr 18, 2011
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.
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Feb 10, 2010
Sometime after I upgraded to ubuntu 9.10 I've been having trouble with my wireless network connection.It will usually log on to the network, then disconnect a shortly after. Then try to connect again, usually successfully, then it cuts off again. Then connects again, then disconnects. FWIW, ubuntu 9.10 works on a different machine pretty consistently, so I don't think its a problem with the router.
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Dec 16, 2010
How can i check my FTP is working properly or not? or check out this connectivity?
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Apr 19, 2010
I use a laptop with a built-in WiFi card (Intel PRO/Wireless 3945ABG [Golan] using iwl3945 module). It's OK but sometimes is not very stable, occasionaly it simply dies and I have to reboot. It was even worse but I improved it by applying a new driver.I also have a very nice USB WiFi card (D-Link System DWA-140 802.11n Adapter [ralink rt2870]). It's much better and faster.
So the problem is that in Ubuntu 9.10 (2.6.31) I can use only the built-in one. The other one (D-Link) also works but I can't make it connect to my router. The built-in card connects to it but the D-Link even does not list it among possible connections (but it lists other possible connections which I do not want to use).The funny bit is that this problem disappears when I use an old Kernel (2.6.28-18 ) : both cards work fine and can connect to the router at the same time (obtaining different ip's). I then disable the built-in one and happily use the external card.
Unfortunately the old Kernel has issues with sound and video, so I would like to use the latest Kernel with the external card. I tried WICD but it didn't change anything.I can add that under the old Kernel the USB card is used as a ra0 device while the new Kernel lists it as wlan1.
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Apr 4, 2011
I have an issue with my Dlink DWA 547 802.11n PCI adapter, I'm under LUCID fully updated.I have no trouble connecting to any wireless but after a few minutes I'm loosing the connectivity strenght (getting ping reply from my router that vary from 2ms to 200ms). But as soon as I'm rescanning the network using the command (sudo iwlist wlan0 scan) everything is fine (constant 1-2ms ping). I'm using wicd as network manager. I have tried to schedule a job in crontab to launch every 10min a network scan command, but didn't succeed to have it working, morehover I don't think that's the good way.
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Jan 14, 2011
The goal: ipv6 connectivity using 6to4 The problem: no connectivity on some internal hosts (mixed win & debian) and no ipv6-web access on any host. Let's start with my external box. It is headless debian lenny dhcp/local-dns & cache/firewall. It has the following interfaces after a reboot:
[Code]...
My understanding is that ipv6 will auto-configure itself and that the radvd file is all that is needed by the external host to give all the ipv6 enabled internal hosts ipv6 web access. My question: How is my external host misconfigured? Or are the problems specific to the internal hosts? I am assuming that I have issues on both the external and internal hosts since some of the internals have golobal ipv6 address and some don't. I do however wish to address the external host first.
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Jan 13, 2010
Machine 1) I have a Server with RHEL5.
eth0 = 192.168.48.x (static class C ip connected to VLAN switch)
Internet available via HTTP proxy through vlan but from other main server but not from machine below.
Machine 2) I also have a Server with RHEL4.
eth0 = 124.30.XXX.xxx (public IP for availing internet)
eth1 = 192.168.60.xxx (class c ip to share internet via squid on the same LAB)
eth2 = 192.168.16.xxx (class c ip connected to VLAN switch)
Now what I want is ssh connectivity available to Machine 1, so as to enable remote machines on the internet connected. I know that it might be hard for Machine 1 to share ssh directly on the internet but if there is any kind of tool or tricks to setup pls tell. So the only chance is ssh via machine 2 then after connected to Machine 2 then again ssh to Machine 1. But how do I make ssh available online? IPtables are set correctly machine 2 can't be ping on the internet.
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Mar 28, 2010
I am working on a project to build an embedded board with WIFI connectivity. My present status:
- I have a embedded development board TS7200 .
- It has USB and Ethernet Port.
- I am able to get port Linux on it and run program to communicate between devices and a computer using socket programming and Ethernet.
I need help in deciding how to get WIFI connectivity to the board. I guess it would mostly be using WIFI dongle? Any suggestion for a WIFI dongle?How should I get it working? Where should I look for proper reading material? I am am planning to do some basic program practice using WIFI on my laptop. How can I do that ?
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Apr 18, 2010
I have a tricky problem which I could soIve with a c program. I wrote one and found I didnt have gcc so I tried to install it. I was told I needed to install packages. I acknowledged and an error was generated gcc-4.4.2-7.fc12.i686 requires libgomp = 4.4.2-7.fc12 I try to install libgomp and go round again.
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Oct 11, 2009
I have a Fedora Linux machine and a Windows XP machine and I want to enable TCP/IP connection between them using a cross-over cable. I have a type of middleware server running on the linux machine and I want to be able to run the client for the application on the windows machine and work that way. I have heard Samba as a solution but my understanding is SAMBA is mainly for file sharing.. and is not necessary for establishing TCP/IP connectivity. Is this a correct statement? How can I go about setting up TCP/IP connectivity between the two machines?
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Oct 11, 2010
May I please have some help configuring wireless connectivity?I just moved and went from connecting to a LAN infrastructure to connecting with a wireless cable modem. The modem is dual-purpose, it has two ports, one for an Ethernet cable, and an access point for a wireless connection. The ISP is CableOne. My laptop, which I use most often, is wireless capable, and I want to use the wireless feature. The laptop is running Fedora 13 KDE, with a VirtualBox virtual drive running WinXP.
I have used NetworkManager to create a wireless connection and name it. I have also used WPA encryption for this because I don't want anybody else using my bandwidth. Moreover, I have tried no encryption and WEP, all to no avail.
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Mar 13, 2010
I've been trying to use the wireless adapter that came shipped with my computer for a while now (it is NOT a USB adapter; it seems built into the computer). However, I can't seem to get it working.HP says that the driver is Lite-On USB Wireless 802.11 b/g Adaptor. I am currently connecting to the internet with my netgear USB adapter (I think the driver is something like prism_usb)
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Nov 21, 2010
I can see the network shares, but when I click on one of them, I get the message:Unable to mount location (header)Failed to retrieve share list from server (body)This worked fine for me in the previous versions, so I don't know what to try.On the windows machine, the share can also be seen but not permitted to connect.
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May 15, 2011
I am new to linux. I just installed linux on my PC and wanted to configure wireless network connections. I have entered SSID and mode is set to infrastructure. I don't know what is BSSID do I need to enter MAC address (of router?)?I need to connect to internet wireless can you please guide me ?
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Jul 2, 2011
I have a Air-CB21AG-A-k9 cisco Card and trying to run it with Ubuntu 11.04. But this card doesnt seems to be plug n play device with ubuntu 11.04. As soon I inserted the card both the leds are flickering but no wireless conectivity.
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Jul 22, 2011
I've tried to set up an easy PXE server to set up ubuntu on various PC's via network. When I was finished I tried to boot a virtual mashine and later a normal notebook, both had the same problems, they find the TFTP server start booting and installing but it always fail. Reason: they get no IP from the DHCP-Server (I'm using dhcp3-server), even if I enter an IP manually I only get to the mirrow step where it tells me bad mirrow and the dhcp log says: Abandoning IP address 192.168.1.46: declined. I also rebootet the router but nothing changed.
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Jun 15, 2010
I am using Suse 10 sp2. By running ifconfig I am changing the mac address. Everything is happening successfully, but this is adapter losing the network connection. Even when I give a static IP. I am not able to ping any other IP.
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Dec 16, 2010
How can i check my FTP is working properly or not? or check out this connectivity?
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Jan 23, 2011
I had my desktop running ubuntu 10.10 at my sisters house hooked up to a router sharing internet with her boyfriend never had a problem with it there. I moved into my own apartment this week plugged the cable modem directly into the broadcom ethernet card and couldn't get an ip or anything it wouldn't connect period so I ended up hooking it up usb which works but only at speeds of 5-7mbit when I have 15mbit connection. So I put another ethernet card in hoping it was just problem with the card and tried it that worked.
I got a connection but it was incredibly slow like getting maybe 5k a second so I open network tools in administration menu and start pinging google. While I'm waiting on a bandwidth test to complete and it takes off getting like 20mbit keeps that connection for a while then out of nowhere just drops to almost nothing. Again for a few minutes then falls off completely so I restart and it does the exact same thing starts off slow then something clicks and it works great for 5 min then nothing?
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Feb 12, 2009
I have 2 cisco sw 3500xl series working properly forwarding traffic. All operations are Layer 2. I have setup keep alive 10 on all the ports. They are connected to another sw together with a Linux router on Cent OS 5.2. I can't ping the switches from the Linux box. If I arping them, I get a response and after that they are accessible for telnet. Otherwise they are not. After 5min the macs are flushed from the arp table of the Linux box, and then again they are not accessible only if I arping them, or set a static mac.
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Oct 27, 2009
I'm having strange difficulties in setting a static ip for my CentOS 5.4 installation. If I use DHCP everything is fine, but with a static ip I have no network connectivity. I have done this many times with RedHat/Fedora/Ubuntu etc. with no problems and now I have no idea what I'm missing or doing wrong. I have tried to set ip as 192.168.1.20 (anything below .100 will do). GW is 192.168.1.1 and NM is 255.255.255.0. This is all I have had to use with other distros, but now when I set these I cannot even access my routers admin page or ping it (192.168.1.1). (I just did this with Vista on my other machine and all worked fine).
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Apr 23, 2009
I've just installed Fedora 10 to basically work as a NAS for another machine - but also serve a couple of web pages. After having alot of issues with network manager (with it changing the subnet so nothing would work), I'm now almost there:
I have two network cards connected in the server:
1) eth0 connects to a switch that ultimately connects it to the net (on a 10.0.0.* network)
2) eth1 connects directly into another server for backups (192.168.0.* network).
Now when I setup eth0, I get network access can ping/ update/ surf the net - absolutely no problems, but when I connect eth1 in - the net dies and nothing works, I can ping devices on both the 10.0.* and 192.168.* networks, just nothing past the gateway. I presume this is either a route or DNS issue, but am unsure about where its falling foul - both the resolv.conf file looks fine as do the ifcfg-ethx scripts.
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Dec 5, 2010
I just installed F14 on my thinkpad R61 notebook and I am not able to completely browse the web. By that I mean that I can connect and access and browse fedora.org (from firefox) and I can install software and updates but no general browsing. I can successfully ping [URL] in a terminal but I am blocked in a browser.
I tried both hardwired and wireless connections to my router, same issues with both and my desktop machine running F14 works just fine (hard line) on the same router.I also tried disabling the firewall and it does not change anything.
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Dec 10, 2010
The problem is I have a wireless Belkin router which I can connect to, but after being connected for a few minutes the net disappears (cuts from the router) and my laptop will have to reconnect again to the router for internet to work again. After a few minutes (or seconds in some cases) the connectivity loss will happen again over an over.
How to fix this problem or some things I can try, I've tried updating to two different firmwares, two different channels and resetting the router. The biggest problem I find is that this happens on both my laptop, another laptop in the house and also my tablet PC but doesn't happen on two other laptops in the house, I've also tested with windows 7 and Ubuntu with my laptop.
My laptop wireless card is Atheros AR9285 802.11b/g/n WiFi Adapter
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Jan 9, 2010
I'm running Lucid Alpha 1. Installed it about two weeks ago. Until a few days ago, the wireless networking was the best I've witnessed on any o.s. However, after last Wednesday's updates, connectivity now lags about 10-30 seconds whenever I open any web-page or access the repositories via aptitude. Granted after it gets going, it's fine. I noticed this same behavior in 9.10. I tested my XP connection and found no problems. .
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Jan 10, 2010
I recently formatted an old Dell D600 and installed 9.10 on a single partition. It connects to my Airport just fine hardwired, but I have had no success getting the IntelPro/Wireless 2200BG card to talk wireless. I've entered the SSID and WPA2 security ID with no success.
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