Red Hat / Fedora :: Xend Kills Network Connectivity On Boot
Oct 31, 2010
red hat 5 update 4 64bit. linux newby. on an interactive boot i can ping -t my vm linux server from my physical MS XP workstation and a vm W2000 64 bit server until xend is started, after that i get destination unreachable. if i choose not to start xend on the interactive boot i retain connectivity. i have read some blogs that imply this might be a bug - is this so? do I need xend on my vm red hat box that is a database server?
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Nov 1, 2010
red hat 5 update 4 64bit. on an interactive boot i can ping -t my vm linux server from my physical MS XP workstation and a vm W2000 64 bit server until xend is started, after that i get destination unreachable. if i choose not to start xend on the interactive boot i retain connectivity. i have read some blogs that imply this might be a bug - is this so? do I need xend on my vm red hat box that is a database server?
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Jul 13, 2009
I upgraded from Fedora 10 to Fedora 11 last night in response to a pop up window. When I rebooted after the upgrade my wife immediately complained about the internet not working. Actually the connection up was working but Fedora 11 upgrade had made it slow almost to a stop There are two XP machines the network behind a local D-Link wireless router with Comcast high speed internet. When I disable networking on the Fedora machine the internet connection immediately returns to normal on the other two machines. Also there is a second or two period after enabling networking for a quick upload or download before the connection clogs.I checked the system monitor network history and found that there is a constant networking send rate of just under 180 kb/s in the background.This occurs even when the browser, email client, and automatic backup are off and the only process showing significant CPU use in the system monitor is the monitor itself.
I tried netstat but there were so many /tmp/orbit entries that I could not scroll up to the top of the listing. Is this normal. If so, does anyone know the netstat command options to just see connections with sent packets. I also tried ifconfig -a. This shows no Rx packets at all, and no TX packets except on eth0, The total etho TX packets matches t,he reported by the system monitor, and in the monitor you can watch the total accumulate in approx 180 kb/sec increments. I don't understand why 180kb/sec TX would make a dramatic difference in internet network internet speed. Comcast reports upload speeds in megabytes. I need to be able to use the net in Federa, but I am also curious to learn what is the caused the problem.
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Jul 30, 2009
Tried to re-install Fedora 11 since I haven't been able to get my network connectivity up for some reason. But during the boot process it got into a comand prompt complaining about some boot record problem and the need to create a soft link to /etc/root.
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Jan 21, 2010
Installed Fedora 12 recently.
For some reason, my network connectivity drops out randomly. This has happened between 5 minutes to 1 hour of booting and logging into the machine.
When the internet does work, its great, and super fast !
When it drops out, Internet stops working, cannot ping to external site and I cannot ping my router 10.1.1.1
I have onboard realtek network ports on my motherboard.
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Apr 15, 2009
I just finished installing CentOS 5.2 x86_64 on a Dell Dimension 3100 (Pentium 4 with 64-bit support). On the first boot, after completing the final config steps (firewall, SELinux, time server, etc), the boot hangs on "Starting xend:". I have completed a successful installation on another Dell machine (different processor), with the same installation options (I recorded all of the steps and followed them for the second installation).
My boot commands in grub are:
root (hd0,0)
kernel /xen.gz-2.6.18-128.el5
module /vmlinuz-2.6.18-128.el5xen ro root=LABEL=/1 rhgb quiet
module /initrd-2.6.18-128.el5xen.img
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Mar 27, 2011
I am new to linux. Whenever I boot my system. I always have to click on system eth0 to enable internet connection in network settings. How can I make it permanent so that as system boots up, network connectivity is itself enabled.
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May 28, 2011
I just installed F15 on a laptop that previous had F12 working well. During install, it finds my wireless card and seems to set it up fine. The full install ran with the wireless active without any problem that I could see. Now, when I start up, I see Network Manager tells me that the wlan is active, but it doesn't show my specific network. If I click on the NM tray icon and open up the panel, my network is shown but it is not "active".
I can double click on it and it will become active - shows the little globe next to the antenna. This works fine for about 2 web pages worth and then FireFox 4 stops being able to find web pages. If I go back to the panel, double click on my wireless network (which looks like it is active already), and reactivate it, I can get the page I was looking for in FireFox, but within a couple of minutes it will stop.
Likewise with yum, while I'm installing software, I'll occasionally get errors like this:
[URL]: [Errno 14] curl#6 - "Couldn't resolve host"
If I reactivate my wireless network in the NM panel, it continues fine. Other computers/phones connected to this network seem to work fine. Is NM known to be problematic in F15?
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Nov 13, 2010
I got a new cable modem so I could get rid of the one I've been leasing from the cable company. It is a Motorola sb6120. Everything is fine with the ISP, it's approved for operation on their network, the only hitch was I had to use my Windows laptop to run their activation software.
At any rate, with the new modem installed, I hop on my Linux box and go to work. I'm seeing some terrible delays in looking up names. When I look with firebug, all the dns lookups for new names are taking 15+ seconds. First I just think maybe the names aren't cached or something is weird for a minute and it will get better, but no. After several restarts and then a couple days persevering with the new cable modem, all DNS queries are still terribly slow (including zypper, mail client, web client).
Suddenly I remember an issue I was having with, I believe version 11.1 when I first installed it. For just the computer on my network with a fixed IP address, DNS resolution was slow like this and if I disabled IPv6 then all was well. I believe there was even a patch issued back then for gethostbyname() that was supposed to fix the issue? So, when I disable IPv6, DNS lookup is back to normal. The two Linux computers on my network had been working fine with IPv6 and the old modem, though, and the Windows box is still working fine even with the new modem.
I can disable IPv6 and make it fast again, but really why should I have to?
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Feb 25, 2011
I'm on opensuse 11.4 (11.3 won't work with my monitor).
My computer gets internet through wireless and I want to share that internet through its ethernet port. So far I've tried using Knetworkmanager to create a network bridge between my wireless and wired connections. I created a new wired connection and shared it using the ip address settings. I was able to get both connections active, but the device hooked up via ethernet had no internet connectivity.
I also tried this command:
echo 1 > /proc/sys/net/ipv4/ip_forward
but another test resulted in the same fashion (no internet on wired). I believe anything I add to /proc should have an immediate effect, correct?
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Oct 16, 2010
I had Kubuntu 64-bit installed and decided to try OpenSUSE instead as I was having problems getting the audio to work on Skype. After installing OpenSUSE 11.3 (64-bit), I do not have network connectivity (Ethernet or Wireless)? Neither adapter can be detected? I thought the install would be fairly straightforward as Kubuntu 64-bit detected all the hardware.
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Jul 13, 2010
I'm having trouble working with Xen on debian, I have many centos servers running Xen and have no problems. Everytime I start or stop a XEN vm it kills networking on the host OS for about 30 seconds. It doesn't respond to pings or anything, then it returns and everything works. I have asked about this issue in #xen on freenode.
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Dec 19, 2010
The hardware, Printer HP Photosmart C309g-m Search HP Australia - Results - 'c309g-m' ADSL wireless router D-Link DSL-G604T/AU V.B3,D-Link Support Resources latest firmware installed.The problem,After setting up to print using wireless access, printing works fine, there is however no longer any internet access available, wired or wireless ( from PCLOS, Mandriva, openSUSE, win7, or whatever!) To restore internet access requires rebooting the router and turning off the printer (or disabling its networking) similar issues with wired network printing.
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Nov 29, 2009
I am booting centos 5.3 on x86-64 machine. The system hands at line "Starting xend:". Is there any way to skip starting xend service during boot or disable it during boot so the system finally reboots.
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Apr 30, 2011
Been away from linux for a few years thaught id come back and give it a try again. I have Win7 on sda and installed 11.4 Ubuntu on sdb. Grub2 Over wrote the boot sector for windows so windows wouldnt show in the boot menu. I repaired that after some research and then tried it again with 10.4 LTS version of Ubuntu. Same thing. Now I've fixed windows boot sector a second time and im ready for round 3. Any hints on how to get grub2 to boot both OS's? Ubuntu 10.4 is still on sdb I think I should just need to re-install grub2 But how to do it without Killing the windows boot sector?
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Jul 18, 2009
I just installed a linksys router for the computers in my house. All the MS windows computers work but the linux computer that I use does not work.
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Feb 21, 2010
I am experimenting with Xen with the standard kernel (kernel-xen package) and utilities. I already got bridged setup to work with a single domU, but found out that because of my wireless card I cannot expect bridging to work when connected wirelessly. Now I am trying a NAT setup but I cannot seem to get any network connection from the domU to the dom0 and viceversa. Comparing the network devices and routing tables of others, I cannot see any problem.
The domU runs with IP 10.0.0.1 and the dom0 has a vif with IP 10.0.0.128 with a default gateway of 10.0.0.254. Pinging from the domU to the dom0 and viceversa does not show any traffic at all when I use tcpdump to monitor eth0 in the domU or the vif interface in dom0. It seems that basic connectivity of the vif interface and eth0 in the domU does not work. Any tips on how to debug this problem?
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Jul 14, 2011
I've just installed Ubuntu Desktop and connected the ethernet cable, but I don't have network connectivity. Why?
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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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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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Aug 24, 2010
Trying to get the wired nic working so I can troubleshoot the wireless. I cannot get any kind of network activity. Been searching so I will post a little information that seems to be common with my situation.
lshw -C network
reveals:
WARNING: you should run this program as super-user.
*-network DISABLED
description: Ethernet interface
product: 82562EZ 10/100 Ethernet Controller
vendor: Intel Corporation
[code]....
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Oct 24, 2010
Anyone have success setting up either wireless or ethernet connectivity on a Macbook Pro 5,5 on the 10.10 Maverick install? Normally in the past with 10.04, etc... I just plug in my ethernet cable and update my wireless using "sudo apt-get install bcmwl-kernel-source", but I can't even get my ethernet to work. I tried to load it from the live CD once logged in but couldn't figure it out.
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Jul 14, 2011
I just installed Ubuntu Server, plugged in the ethernet cable, and there is no network connectivity.
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May 4, 2010
Basically, I wanted to use the Bootp (PXE) protocol to boot a machine (my laptop) from my network instead of using USB/DVD boot medias to reinstall if need be. My router being a piece of crap, I couldn't setup the DHCP server to allow PXE packets. Confirmed from the manufacturer that it is not possible. Well for a $140 router, you would expect the opposite. Anyways, here I am with a small machine setup with Slack, no desktop environment (only CLI) and connected to my router (which I deactivated the DHCP) so the machine can act as a DHCP server. It works very well. However, I would like to install a few other utilities into that machine and for them to work, I need to put the machine between my cable modem and my router. Basically, here's the topology from outside):
Internet (ISP) --> Modem --> DHCP machine --> Router (no DHCP - acting as a switch) --> computers & printers
The problem is that I cannot connect to the modem from the computers on the network. Also I cannot access the internet (go on the WAN side) from the computers. From the computers (namely my laptop), I can ping the router, but cannot ping the interface where DHCP broadcast. Also I cannot ping the modem. From the router (using the web config page), I can ping the DHCP broadcast. From the DHCP machine, I can ping the modem. In the DHCP server, I setup the eth0 (the interface where the modem connect to) as a DHCP assigned IP so it can obtain the IP from the modem. The eth1 (the interface where DHCP broadcast) is static. All my machines obtains a IP from the DHCP machine without a hiccup.
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Oct 14, 2010
I have a Dell D420 that I successfully upgraded to Ubuntu 10.10. Everything looks fine except there is no LAN or wireless working. I upgraded the BIOS to the latest version (A06) and there are no proprietary drivers listed under System/Administration/Additional drivers.
when I plug the LAN cable into the 420, the indicator cycles for a long time but eventually displays the red exclamation mark.
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Apr 8, 2011
I'm having making network/internet connection with my laptop. I have:Toshiba 1415 S173laptop
NetGear WG511T pcmcia card using madwifiNetGear WPNT511 pcmcia card using windows driver via ndiswrapperSlackware 12.2In both cases the card is recognized, and I can get a list of access points with iwlist.I can set the card to connect to the desired access point. I can use dhclient to get an ip address from the remote dhcp server. This works, the card is assigned a valid ip address on the desired network.Once I do this, however, I cannot access any network resources, no Internet, and no other devices on the network can see, ping, or access my laptop. It does this with with both cards, using madwifi or the windows driver via ndiswrapper.
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May 26, 2009
I am having a problem with when I bind a static IP to my NIC I loose all network connectivity but, if i leave it set to dhcp it works fine. I've gone over all my settings a thousand times and they are all correct. Has anyone else had this problem or give me a hint as to what the problem might be?
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Feb 22, 2010
I'm using 11.2 with KDE.
I can connect to the Internet on my WLAN just fine (using Opera) and can dload torrent files (using the same).
However, I have had trouble accessing some community repositories in the past, cannot synchronise with an NTP server (annoying since my battery is low and time and date are reset most reboots) and cannot use the lyrics function or Wikipedia function in Amarok. Nor can I connect to the net using Firefox (though conqueror works just fine...) I cannot download torrents on KTorrent either.
It seems that there is some sort of 'permission'/connectivity issue.
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Feb 28, 2010
I am running Fedora 12 32-bit on an Intel Core2 Duo system. I just installed some recent updated, and after starting the computer, I no longer have any network access, either to my local network or the Internet.
I'm not sure what information to provide at the moment that will be helpful in diagnosing this problem.
What do people know about how I can restore network connectivity to my computer?
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Aug 13, 2010
On my friend's fedora 13 install, firefox was working, it seems, until the recent kernel update (kernel is now 2.6.33.6-147.fc13.i686).
After the upgrade, opening firefox would crash the system shortly after starting, so firefox was re-installed (once using rpm, once using yum).
After a re-install of firefox (using yum: firefox version is now 3.6.7) and Until a reboot, the repeated error report went something like this:
After checking to see if the flash plugin was still around and then doing a hard re-boot, however, just opening firefox immediately freezes the system.
Konqueror will run (albeit rather lamely)
In that I don't know the schedule for f13 kernel updates, if indeed the new kernel is causing this problem, does f13 save old kernels? How do I get the older kernel to start (with fc9 the option could be set in grub, or I could startx from a terminal but I have not been keeping up and am not sure how to do this.
I see there are many firefox issues lately...
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