Ubuntu Networking :: NETDEV WATCHDOG: Eth0 (atl1c): Transmit Queue 0 Timed Out
Jul 31, 2011
When doing bit torrent downloads, I eventually lose the wired network connection in about 5-15 minutes. This only happens when Deluge is running. I can surf for hours, our connect up the the work WAN for hours and this does not seem to happen.Until these last two weeks, Deluge has been fast and solid. Here is the error from the log:
Code:
Jul 31 18:20:06 marcs-desktop kernel: [ 1539.020039] ------------[ cut here ]------------
Jul 31 18:20:06 marcs-desktop kernel: [ 1539.020060] WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 dev_watchdog+0x2a0/0x2b0()
[code]....
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Sep 17, 2010
I did a search on this error and everyone says to add your user to netdev group, I did that but wicd still complains that I'm not in netdev. I'm trying to use wicd now so I can switch between work and home easier.Is there a log file for the kde dbus so I can see if its failing on somehting else?
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Apr 18, 2011
I can share my phone's 3G data with my 10.10 running laptop using usb tether; the phone has no wireless or bluetooth capability. Is it possible to set up my tethered laptop to share the 3G data with another device via the laptop's wireless?NKS!
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Aug 19, 2009
5.10 Breezy configured as machine controller. Works great eth0 is a fixed IP to communicate with controller comms board. Not easy at all to alter - the comms board is hard coded to listen on eth0 for commands.
I can use eth1 as the default gateway and ping google.com, etc. But when I now attempt to communicate with the controller with netcat, e.g.
Code: echo !HH | nc 192.168.1.6 80
I obviously never get an answer since the request is passed via eth1. Using the -g option with netcat doesn't work either. I had a look at iptables but it doesn't seem to be able to do what I want. How I can still use eth0 as my communication port to the controller whilst eth1 is the default gateway?
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Jul 1, 2010
I have two servers on a vlan at my datacentre/colocation and previously both servers had public IPs on their eth0 interfaces. The servers are HP ProLiant DL360s - one is a G4 and one is a G5 The newer G5 is now the LAMP server and the G4 has been retired and I want to repurpose it as an iSCSI target using openfiler freenas or similar.
My G5 has public/static IPs lashed to the eth0 physical interface and the eth1 is not configured to do anything yet. The G4 will have both interfaces available - perhaps one for ssh access from one of my static public IPs and the other to be a private IP on the local vlan. Here is what I am trying to get my head around...
The G5
eth0 - Public IP - full LAMP services on two or three virtual interfaces
eth1 - Private IP 192.168.0.1
The G4
eth0 - Public IP for ssh
eth1 - Private IP 192.168.0.2
Because my traffic between eth1 on these boxes is via private IPs on the local private vlan it doesn't add to my quota for bandwidth. How do I go about configuring the routing and gateways and other aspects of this so that I can run a private IP space network between the eth1s and still serve the outside world from the eth0s...
I am afraid that if I assign the private IPs to the eth1 interfaces the routing may either not work or interfere with the access to the production internet facing interfaces (eth0s).
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Dec 18, 2010
I'm running a dual boot Ubuntu 10.04/Backtrack 4 (Ubuntu 8.10) system. I can get internet in the BT4 side but not in the Lucid side. In Lucid I can ping my router, and the network manager says I'm good to go, but I can't get to any web sites. It all started when I tried to put my laptop on another network by mimicking the settings of a computer I had just unplugged from the network. MAC address and all.
ifconfig eth0:
Code:
eth0 Link encap:Ethernet HWaddr 00:1f:16:ba:4c:8c
inet addr:10.136.9.147 Bcast:10.136.9.159 Mask:255.255.255.240
inet6 addr: fe80::21f:16ff:feba:4c8c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
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Mar 15, 2011
I recently completed a scratch install of Fedora Core 14 64-bit onto a system, and while everything appears to be running properly, I noticed there are almost 300 processes running at a given time on the server. The top command indicated there were ten-plus instances of the watchdog, migration, and ksoftirqd daemons running on the system. I am not familiar with these services, so I wanted to know what they are, and is there a need to have this many instances of each running on the system?
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Nov 3, 2010
is it possible to get the length or even the items of both queues, the run queue and the swap queue? I've googled a lot but had no luck. Maybe I havn't used the correct search words...
Is there any header and/or code example to use structures or any API to get these information from the kernel or the scheduler?
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Jun 21, 2010
I am using Ubuntu 10.04 64-bit and I purchased a new ALFA AWUS036H wireless card. I would like to know if this "1Watt" wireless card is configured for full power. iwlist wlan0 txpower results:
wlan0 unknown transmit-power information. Current Tx-Power=27 dBm (501 mW). It appears to me that I should be able to increase the power. "iwpriv wlan0 highpower 1" does not work. Do I need to patch the new default driver that comes with Ubuntu 10.04 64-bit with the aircrack one following these directions:[URL]...? Monitor mode and a injection tests seem to work fine with the driver I have installed.
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Apr 22, 2011
im trying to setup eth0 with subdevice eth0.0 and eth0.99 to come up at boot
eth0 is dhcp clint
eth0:0 is static ip
eth0.99 is 802.1q vlan interface
/etc/network/interfaces
Code:
auto lo
[Code]....
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Dec 26, 2010
i install kernel rpm after i boot that kernel network not working kernel name : kernel-rt-trace-2.6.24.7-132.el5.centos.i686 [URL] error "Bringing up interface eth0: Device eth0 has different MAC address than expected, ignoring."
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Sep 20, 2010
for weeks now I have the following problem: I am not able to connect to my wireless home network for most of the time. I am using Ubuntu 10.04; an Intel Wifi AGN4965 card and as driver "iwlagn". Maybe the solution lies within these messages (from daemon.log):
Sep 20 22:03:35 ubuntu NetworkManager: <info> starting...
Sep 20 22:03:35 ubuntu avahi-daemon[1130]: Found user 'avahi' (UID 104) and group 'avahi' (GID 111).
Sep 20 22:03:35 ubuntu avahi-daemon[1130]: Successfully dropped root privileges.
Sep 20 22:03:35 ubuntu avahi-daemon[1130]: avahi-daemon 0.6.25 starting up.
Sep 20 22:03:35 ubuntu avahi-daemon[1130]: Successfully called chroot().
[Code]....
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Jul 30, 2010
I try to generate a server client code. What i try to do is sending video streams from eth0 and eth1 to the other server programs' eth0 and eth1. In order to do that, i decided to use SO_BINDTODEVICE. But the code is not working. Am i misunderstood the usage of SO_BINDTODEVICE.
1-Defining two ports
2-Defining two sockets
3-Assigning host ips on them
[code]....
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Aug 16, 2010
The alternative and minimal installation images do not contain drivers for my EeePC 1101HA's network devices. The module required for the ethernet is atl1c (Atheron AR8132), but the discs contain only atl1 and atl1e. What can I do to install it?
I dug the .ko file out of the live CD (which works fine) and tried to modprobe it in the alternative installer's environment (minimal won't let me mount any storage devices), but modprobe wouldn't accept it as a module. So I gather there's a missing step somewhere.
Also, the alternative image is choking on an error, "Debootstrap error: Failed to determine the codename for the release." So I can't even install from a mounted ISO and figure out how to install the driver on the otherwise working system.
How do I make this work? I'd really like to build an Ubuntu system from the ground up instead of relying on the ready-made desktop live CD.
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Jul 13, 2010
I am relatively new to Ubuntu. Currently running Lucid Lynx, but I cannot connect to the internet. I can ping 127.0.0.1, and google.com. Software update works as well, but the connection times out when I try connecting to a web site e.g. bbc.uk.
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Feb 4, 2011
I am not so experienced with networking in Linux. I've successfully installed Red Hat Linux Enterprise 5.2 on a VMware host. When I issued nslookup command, it returns "connection timed out" error as follows:
Code:
[root@rac1 ~]# time nslookup rac1
;; connection timed out; no servers could be reached
real 0m15.038s
user 0m0.000s
sys 0m0.000s
My questions are:
(1) Is that error normal?
(2) Is there a way to decrease the 15.038s value? rac1 is the local hostname, so why it takes all that time to resolve it.
Following info may help:
Code:
[root@rac1 ~]# hostname
rac1.mydomain.com
[root@rac1 ~]# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
#eth0 - PUBLIC
192.0.2.100 rac1.mydomain.com rac1
[root@rac1 ~]# ping -c 4 rac1
PING rac1.mydomain.com (192.0.2.100) 56(84) bytes of data.
64 bytes from rac1.mydomain.com (192.0.2.100): icmp_seq=1 ttl=64 time=0.015 ms
64 bytes from rac1.mydomain.com (192.0.2.100): icmp_seq=2 ttl=64 time=0.029 ms
64 bytes from rac1.mydomain.com (192.0.2.100): icmp_seq=3 ttl=64 time=0.029 ms
64 bytes from rac1.mydomain.com (192.0.2.100): icmp_seq=4 ttl=64 time=0.029 ms
--- rac1.mydomain.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3000ms
rtt min/avg/max/mdev = 0.015/0.025/0.029/0.007 ms
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Jun 23, 2010
How do I use the drop-trace command in NS2 to create a trace file of all of the packets dropped over the course of a simulation? If drop-trace is the wrong command to use, which command should I use to monitor the number of packets dropped at a certain queue in a link?
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Jul 22, 2011
Anyone else having issues with the Atheros AR8132 and the atl1c module? I am on the 2.6.38.8-35.fc15.i686.PAE kernel, tried with a few others but it's flaky no matter which I choose.
Sometimes if I load/unload the atl1c module a few times the link will come up, but it seems the module is not even being loaded at boot and I have to modprobe it just to see the NIC.
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Mar 3, 2010
Running into this error while trying to install the attinsic atl1c ethernet ddriver
Error:
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Jan 23, 2010
I cannot connect my Sony Viao laptop to wireless. It just will not seem to connect. I am a bit of a n00b i am afraid so go easy on me
I have been through /sys/bus/pci/drivers/ipw2200 does exist. The Wireless has connected before but it has just seemed to have stopped. I have tried a few suggestions made in the forums and edited my interfaces config.
[code]...
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Dec 13, 2010
I did a clean install of the latest version of Ubuntu. For some reason, there are still internet-issues. When I tried out the following command
Code:
telnet
open ftp.microsoft.com 21
I got
Code:
telnet: Unable to connect to remote host: Connection timed out
Also, during install of the new ubuntu, it was unable to reach the repos for downloading. Odd thing is that I can go online, and that when I type 'ftp.microsoft.com' in my browser, it displays the file-hierarchy.
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Aug 3, 2010
I want to know the basic function of TCP Backlog queue.
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Dec 31, 2010
there is a program on the shoutcast website called sc_trans which can be configured fairly easily to transmit a playlist via shoutcast. However, it seems to require a set playlist, and there is no easy and reliable way to tell it one song after the other what it should play (say, to get it to play whatever I am playing in Rhythmbox if I were to write a program to do that).So the question I have is this: Is there an alternative (preferably open source) shoutcast transmission library that I can use instead?
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Feb 12, 2010
I am a windows programmer. There I wrote a firewall and VPN System. It was easy. Simply, I USED WINPKFilter by ntkernel.com.What I need is to GET, Edit, and Send the raw Layer 2 packet before reaching to IP Stack.My friends were saying that linux is Ideal for Networking purposes. But for now I say that Linux is very bad in this field and I should say that windows is much better (I beg your pardon)After tens of hours for searching I got nothing good. The hook system of IPtables is not GOOD for me because it has not Ethernet header and also the packets are defragmented when I caught them.
I tried ebtables but it has no user space queue like IPTABLES. What I exactly need is to be able to reach to the chain of raw Ethernet packets and be able to modify them and resend or inject some ethernet packet packet. I Dont Want to go inside the KERNEL. (As windows I want a userspcae library). Dear linux expert I beg your help. Do not let me turn back to windows.
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Jan 29, 2011
I have a laptop running Ubuntu 10.04 LTS which is connected to a wifi home network. In my bedroom I have a data server running Ubuntu 10.04 LTS which is also connected to the same network and connected to a stereo with speakers across the room. Is it possible to play music on my laptop but, instead of playing it through the speakers of my laptop, transmit the audio stream over the network to the data server which plays the music on the big stereo?
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Mar 24, 2010
Issue with the 'host' command that comes with bind-utils package.We don't have any browsing/name resolution issues except to the following two sites:
[code]....
command [URL] returned:
www.aeroplan.com is an alias for www.halb.aeroplan.com.
www.halb.aeroplan.com has address 207.34.195.17
;; connection timed out; no servers could be reached
;; connection timed out; no servers could be reached
[code].....
I have tried to run the "host" command against different DNS caching servers I have access to all produced the same timed out error. I called Aeroplan technical support to report the issue to them and from their perspective, they have no problem accessing the website.And we don't have any problem accessing any websites ourselves if "host" return A record lookup without the timed out error.
1. It's not our firewall filtering out packet. I tried it on external facing server without firewall and got the same result.
2. It's not our DNS caching server cause same errors are observed on our ISP caching server.
3. It works on an altogether network, from a Windows Vista desktop, through IE 8.
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Feb 4, 2010
Can the SFQ queue be used to divide bandwidth not only per connections but also per computer? E.g. if two computers download something each computer gets half of the bandwidth. I'm trying to do my own script based on wondershaper and would want to divide the bandwidth between all devices so that one device can't saturate the uplink.
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Jul 9, 2010
In my Solaris tcp client server program, In server side I am checking the size of recv buffer, based on different listen queue size.
I was expecting this size to be increased due to the increase in receive queue size. why the value is same ?
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Sep 27, 2010
I have a hardware device with two ethernet ports, eth0 and eth1 running Centos 5. Basically my goal is to forward packets from eth0->eth1 and eth1->eth0 as well as get a copy of these packets for analysis. If I set IP routing to do the forwarding then I won't get a copy of the packets for analysis.
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Sep 15, 2010
As is known, there is a queue lies between the kernel subsystem and the network driver for incoming data. And if data come when this queue has no space for it, the data got dropped by kernel. Is there some way to see how many packets are dropped due to this buff penury? I tried netstat -s but could not find something useful. On the other hand, I found this 12176 packets collapsed in receive queue due to low socket buffer from netstat -s. I think this is something related to the per-socket buffer, but not the incoming queue between the network driver and kernel. Is this right?
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