Networking :: Sudden Severe Packet Loss/ Unable To Connect DNS To AP
Aug 23, 2010
I am running Linux Mint Isadora 9 and recently installed a wireless USB adapter. After installing RT3070 drivers for my RT2070 card I got everything working and life was good. Now, all of the sudden I am having a world of problems connecting to the internet. I can connect to my AP fine, but I cannot access the internet. If I attempt to ping my AP by IP address I get severe packet loss. I cannot ping my AP by url [URL] at all so Im guessing there are some DNS issues as well.
Code:
poe jk # lsusb
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 003: ID 046d:c045 Logitech, Inc. Optical Mouse
Bus 003 Device 002: ID 413c:2005 Dell Computer Corp. RT7D50 Keyboard
[code].....
View 2 Replies
ADVERTISEMENT
Apr 29, 2010
I have linux workstation. All users home directories are NFS mounts.
Since I am facing packet loss issue users are unable to login to the workstation.
I found the packet loss using mtr from workstation to filer.
Matt's traceroute [v0.54]
Hostname
What are the things I have to check to resolve this packet loss.
Following is the ethtool out put of the workstation
Settings for eth0:
View 2 Replies
View Related
Mar 16, 2010
For most of today I had my internet connection dropping out on me intermittently. I assumed it was a provider issue, as it has been unreliable in the past. After it dropped out for good, and I could not print through network, I realised it was not a provider issue. All the other computers in the house were connected, including another ubuntu box. Only the MacBook Pro 5,5 was not able to connect. The network manager indicated I was connected to the network, throughout the whole time.
A number of restarts with the kernel I normally use (2.6.31-19) including one in recovery mode, yielded no change, but a restart with the 2.6.31-20 kernel resulted in connectivity. Finally, perhaps by chance, wireless started to work again on the 2.6.31-19 kernel, after I once booted into the Mac OS, and then back into Karmic. How I might go about diagnosing, obviously in hindsight, what happened? I suppose I should look in the log files, but I have no idea where exactly, and what to look for.
View 3 Replies
View Related
Feb 21, 2010
i made a video and i wanted to put it on my myspace(video upload) and it justs fade to grey and becomes unresponive. that it goes back to normal but no progress. so then i tried going to image shack and uploading a picture. can't do that either. tried mediafire, videos, vimeo, nothing.
so i tried on my desktop(desktop running 9.10 32 bit. laptop(the first one i tried) running 9.10 64 bit. it didn't work on that either. i know it's not my isp because it works on my ps3(no ubuntu). not my firewall and tried without without my router. didn't work either. i tried upgrading flash on both of them and on my desktop i can upload some pictures to imageshack now. nothing else though. i have tried using both firefox and opera.
i pinged yahoo and this is what i got:
6 packets transmitted, 6 received, 0% packet loss, time 5007ms
rtt min/avg/max/mdev = 72.732/73.437/75.024/0.761 ms
View 1 Replies
View Related
Jun 23, 2010
I am simulating a TCP/FTP to TCP/FTP network and trying to monitor the packet loss.
I am able to monitor and graph data regarding the TCPSinks' bytes received, but I can't monitor packet loss.
Why is it that the TCPSink Agent has a variable for bytes (bytes_) but not one for monitoring packet loss?
Do I have to monitor the packet loss from the queue? If so, how do I write code for this?
Below is part of the code for monitoring bytes received from sinks if anyone was interested.
View 4 Replies
View Related
May 29, 2010
I am just starting my adventure into Ubuntu. After installing and configuring Shrew Soft in Ubuntu 10.04 64Bit, I am having some serious packet loss issues. The LAN is wireless, however the only packet loss I experience is over the tunnels. I have tried different algorithms, and it seems as I fiddle with the MTU client side, it clears a bit, but the best I have managed is 23% loss average.
View 2 Replies
View Related
Jan 23, 2010
I try to setup a locale network between 10 (Web) Servers (openSuse 11.2), each Server is connected to the internet (eth0) which works fine on all servers.
A 2nd NIC eth1 (1GBit rtl-8169) on each Server is connect to a Switch and should function as a LAN. I installed/configured the 2nd NIC with yast, and than added a route for the local network (192.168.20.0) to use eth1. So far every thing works (ssh for example), but I have a packet loss of 10%-60% (ping) on the local network, and I cant find the reason for the packet loss. I already installed a Debian Lenny on 2 Servers (just to test) but I have the same problem on Debian.
No firewall or any other application is in the way. With tcpdump I could figure out that the packages are send but never show up on the destination server.
I put some more information about how I configured the LAN below. I have not done this my first time and from my experience if something is wrong with the network configuration (wrong routing, firewall in the way, etc.) this usually leads to a packet loss of 100% or the destination is simply not reachable.
The 2nd NIC is installed with either yast on suse , or by editing /etc/network/interfaces on debian. The Kernel module rtl8169 is loaded.
They are configured with the following values:
Route is added by:
Output example. of ifconfig :
Output of route (same on all servers):
Output of ping:
View 14 Replies
View Related
May 5, 2010
I got a new X201 which is running Ubuntu 10.04. While at home, everything is fine, at work, I encounter some issues with wireless. the signal cuts in and out repeatedly.Here's the output of ping. I set it to ping a server every 90 seconds, 10 times. So this is a snapshot of 15 minutes of network activity...
Code:
PING (REDACTED) bytes of data.
64 bytes from (REDACTED): icmp_seq=1 ttl=252 time=1.50 ms
64 bytes from (REDACTED): icmp_seq=2 ttl=252 time=2.13 ms
64 bytes from (REDACTED): icmp_seq=3 ttl=252 time=1.38 ms
[code]....
Also I tried this (from a 2 year old thread which was most relevant solution I could find):
Code:
Changing AVAHI_DAEMON_DETECT_LOCAL=1 to AVAHI_DAEMON_DETECT_LOCAL=0 in /etc/default/avahi-daemon has got rid of the irritating pop-up. Basically, every 5 minutes or so, for a solid 60 seconds or so I get no signal. I've tried updating the kernel, and doing apt-get remove avant-daemon, but still have problems.
View 1 Replies
View Related
Dec 28, 2010
I have a following configuration: 4 PCs (say, A, B, C and D), running Ubuntu or Debian, interconnected using a gigabit switch, which is connected to the Internet. Two machines (say, A and B) also have a direct private connection between them (provided by another pair of NICs).
Now, when I test the connection performance with iperf, the results vary. The private connection between A and B performs well - about 930Mbps using iperf's UDP test. Between C and D it is about 800Mbps which I find tolerable. Packet loss when running these tests is negligible.
However, when I run iperf between any of {A,B} and {C,D}, the performance significantly drops as there is a huge number of lost packets.
For example, here is the result of testing between A and C:
Why is there such a large number of packets which are generated, but lost somewhere?
A<->B private link works fine, so system level parameters on both A and B are correct. Furthermore, C<->D works ok, so I guess I shouldn't blame the switch.
Is there a per-NIC configuration that I should check or it smells like a hw problem? Problematic NICs on both A and B are of the same type - Allied Telesyn AT2916T.
View 6 Replies
View Related
Jun 26, 2010
I am running Slackware 13.0 on a old dell dimension 4500. The install went fine. sound worked, graphics where good. Everything was going perfect. until i worked on wireless.i have a realtek rtl8185 wireless chipset card. I got the wireless. Linux wireless driver. It worked on both Mint 5.0 and backtrack 4.0.so I untar the file. cd to the dir and type make then make install and reboot. like I have always done.
I was having to fight with wpa_gui and finally got it working but then it would go in and out on the connect and disconnect feature. so I tried using iwconfig. did not get muc luck with that either so i installed wicd and finally got a ip address after fighting with it would give me in a ping like 75% packet loss. so I read a lot of post and try to find stuff before I post. and while reading I learned that you guys normally ask for info on the hardware and software so here you go. but I will say first that I read about adjusting the mtu to fix packet loss, I showed some of the changes I made in it around the pings I know it is a mess I am sorry I tried to make it readable. if you need more information let me know. I cant get online using a web browser or if I can only for one or two pages. any help would be great. thank you.
Code:
bash-3.1# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
[Code]...
View 5 Replies
View Related
Apr 9, 2010
I have 3 Dell Precision M4400 machines. After getting updates yesterday or today, I get random network dropouts like crazy, on wired or wireless. On one machine I was able to turn off ipv6 in grub and reboot, and it works now. However on the other 2 machines, still have the same problems. All 3 are running 9.10 64 bit. Is there a way I can back out the updates so the network works again? Anyone else see this behavior after updates today?
View 2 Replies
View Related
Jan 6, 2010
I'm using kubuntu 9.10 desktop edition as a server and I set the IP statically, what happens is that when I ping it from another machine on the same network, I get intermittent packet loss (up to 80% and sometimes even higher). When I ping any other machine on the local network everything's fine with 0% packet loss. Packets go directly through switch, no router or anything in between.
I suspected wiring issues, but that doesn't seem to be the problem after I changed the wiring. I was connected to wireless and suspected that but no go either. Same thing when I turn wired. I just changed the ethernet card suspecting drivers but that's no good either. Iptables is a cleanslate installation, it's totally empty.
View 9 Replies
View Related
Feb 27, 2010
Just want to know if my connection will be good for voip like skype...
View 1 Replies
View Related
Aug 5, 2011
I have ubuntu lucid running on Dell 230 PC, linksys WPN600 N wireless PCI network card connecting to a Cisco E3000 dual channel router.
Kernel: 2.6.32-33-generic
Installed Ralink driver v2.4.0.0
iwconfig shows that the bit rate is 130Mb/s and link quality is 98/100. I'm using the wcid network manager instead of defaul gnome one. I'm getting lots of packet loss and performance is very bad. The connection is practically unusable. I've tried installing the compat wireless backport package but that did not work at all.
View 1 Replies
View Related
Apr 22, 2010
I have problems with my network speed when i ping my proxy server I end up getting a high packet loss generally more than 30%.I have tried to use various network monitoring softwares like etherape, wireshark, tcpdump but I am not able to get to the bottom of the problem.basically I am trying to find out where the lost packets are going.
View 7 Replies
View Related
Nov 2, 2010
I am recently trying to get a steady wireless connection running. I am currently using the default settings/driver Fedora 13 is stocked with. As my internet browsing is somewhat up and down in load times, I decided to check in a video game which is generally a good test for me. haha I am harshly spiking and cannot find the source of my problem so my guess is a driver issue.
lspci | grep Network:
Code:
Code:
It is is seemingly right, my Windows 7 harddrive works just fine, this is just one last of the few issues I'm having from fully formatting my winblows HD to use as Linux storage.
I cannot find any native AR5008 Linux Drivers for my card and it has been a frustrating day. I guess I'm not cut to be a network analyst just yet.
System specs:
ASUS P5Q SE/R
Intel Core 2 Quad Q9550
4GB DDR2 667
Gigabyte GTX465 1G
TP LINK TL-WN851N Wireless card
View 7 Replies
View Related
Dec 7, 2010
I have some boxes and laptops connected to the same lan. While messing around with xorg.conf and doing a couple of restarts, one of the boxes suddenly lost internet access.The other machines can ping each other and access the internet (the boxes through eth0 and the laptops through wlan0). That one box, however, cannot ping the others, nor the router. Both ends of the internet cable are plugged in, and there are the usual continuous green and orange lights on the box end, telling me that everything is fine with the hardware connection.ifconfig gives me:
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask: 255.0.0.0
inet6 addr: ::1/128 Scope:Host
[code]..
I have no idea what happened, since the lights indicate it is not a hardware problem. It must be a problem with that particular machine, since the others are fine. However, I have not changed any of the network config files.
View 2 Replies
View Related
Oct 25, 2010
I have a laptop running slackware-current. The disk is /dev/sda and the root 'sda1' is xfs formatted (there is also linux swap at sda2).
recently I was trying to setup openvpn and had to copy a folder with configuration files from /usr/doc/openvpn_<version>/easy-rsa to /etc/openvpn.
I am sure the copying completed cause I got a prompt, but a few seconds later the battery died on me. When I got mains and powered it up, I could see the directory I copied under /etc/openvpn, and the files where all there too. but they all contained nothing. i.e. they had a size of 0.
I read [URL] Fthat an external journal filesystem for root is not supported. I am not sure If it applies to my situation though. As in does it use an internal journal instead?
and the bottom line is: shouldn't the copying have completed successfully? shouldn't I be worried, that this copy failed?
View 7 Replies
View Related
Jul 27, 2011
[Code]...
I adjusted my routes to use my ppp1 (VPN) connection for almost all browsing. Have I misconfigured something.? Some more background information: My VPN is about halfway around the world from where I am / my PPPoE connection. I've already changed my DNS servers in /etc/resolv.conf to Google's 8.8.8.8.I get around 2 kBps on Ubuntu and 50 kBps on Windows using the same VPN. =/
View 9 Replies
View Related
Dec 18, 2010
I was connecting to the internet with no problems at all until two days ago. a while back I set my local IP to #.#.#.11, the internet failed.
Code:
I removed the added code from /etc/network/interfaces and the internet started up again, however the card retained the .11 IP address and has done through many installs... Don't know why or how, probably just a router DHCP setting not retiring the IP of machines.
That wasn't a problem as far as I know.
Ok, so I check a wired connected win7 pc and an ipconfig /all shows he's got the #.#.#.11 address. Checked a wireless win7 netbook and it got a #.#.#.24 address
Wireless key double checked and is correct.
I'm now on my WinXP partition (dual boot with the same ubuntu install that won't connect to the internet) it's getting the IP #.#.#.5 and is connecting with no trouble(albeit slow windows)
All machines are set to automatic configure, but obviously retain the same ip for a while.
I've tried
Code:
iwconfig show that the wireless card is indeed wlan0
Here's basic information
Code:
Wireless card on non-connecting machine: Belkin N+ wireless card, v2001, NDISWRAPPER
will this work?:
Code:
The problem is that if I try and connect to the router it does the "connecting rotating circle" and then just either has a message "disconnected from wireless" or asks me again and again for the WPA key, which is already correct.
LiveCD and fresh install both fail, used ndiswrapper and it's always worked fine before.
using Ubuntu 10.04
How I can get connected again? This is a desktop, a wired connection is just NOT possible.
View 8 Replies
View Related
Jan 3, 2011
At first I was connecting to the internet via WiFi on my home network, and all of the sudden I couldn't connect to my wireless network anymore. The strange part was that I couldn't see my wireless network connection. But when I go to hidden wireless network its there, yet I still cannot connect.Im using the Ethernet core for now and it works fine.
Code:
fasttiger@Beast:~$ iwconfig
lo no wireless extensions.
[code]....
View 9 Replies
View Related
Oct 13, 2010
I'm beginning to write a custom RTP implementation and want to test its resilience to UDP traffic. I've searched on the web and all the links I can find are for analysing actual traffic, not generating it or messing it up.
Does anyone know of any software (preferably free software) that will, for example, take actual UDP traffic and drop packets, duplicate some and make some arrive late/out of sequence?
View 1 Replies
View Related
May 10, 2010
I am running Redhat linux 8.0 with 2.4.22 kernel. I am using this server for traffic shaping my static ip clients using tc. There are about 250 clients and I am running mrtg to monitor traffic via cronjobs each 5 minutes. When mrtg run I see too much packets loss in my network. What could be the problem in my server?
RAM is 1gb and processor is Intel Pentium D 2.66GHz.
View 8 Replies
View Related
Feb 22, 2010
I',m executing ping, but it didn't work, in order to find the mistake in my network I would like to know how to see the errors:
Code:
18 packets transmitted, 0 received, +12 errors, 100% packet loss, time 17038ms, pipe 4 I want to see this +12 errors. Could I do that?
View 2 Replies
View Related
May 7, 2011
My linux machine is connected to the outside internet, and I have a minecraft server running on an internal machine (192.168.1.201). Right now, I am forwarding port 80 on the linux machine to 192.168.1.30, which is working.
iptables -t nat -I PREROUTING -i eth0 -d 192.168.1.30 -j DNAT --to-destination 192.168.1.201
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED,RELATED -j DNAT --to 192.168.1.201
______________________________
I want to filter out the GET/POST requests and forward them to port 8080. I can't seem to get that working.
I've tried this:
iptables -A INPUT -d 192.168.1.30 -p tcp --dport 80 -m string --algo bm --string 'GET' -j REDIRECT --to-ports 8080
View 1 Replies
View Related
Jul 12, 2010
I am the new user to ns-2. I would like to know is it possible to send the keys or some value as the packet data (content of the packet) in ns-2 (for wireless environment).
View 1 Replies
View Related
Jan 2, 2009
with the same router, same ISP, same connection basically, on Fedora I'm getting on a maximum of 60 mbps. I also get moments where no pages will load, but network manager will report that nothing is wrong and that the connection is 100%.
View 13 Replies
View Related
Nov 2, 2010
I am unable to connect to wireless network in ubuntu 10.10.i have noticed that the iwlagn driver isnt been used by anything.
View 9 Replies
View Related
Apr 6, 2011
I am trying to setup a dhcp server for my internal network. I have two NICs, a modem, and a wireless router. I have my server connected directly to my modem which is providing me with Internet access on eth1 and is working fine. I have dhcp and dns setup on eth0 which is connected to my router. The router shows that it is connected to the Internet but when the router gives a client computer an IP address, the client is unable to connect to the Internet but can connect to the router. I will post my configuration files below with my current configuration.
[Code]....
View 5 Replies
View Related
Jul 27, 2010
I just switched from Ubuntu to Fedora 13 because I was unable to get Ubuntu to connect to wireless networks. I tried everything suggested in help and forums, and kept getting "Bad Password" with WICD and Network Manager. Now, with Fedora...I still can't connect.
Problem #1: The guide says to "...make sure that the relevant wireless interface (usually eth0 or eth1) is controlled by NetworkManager," and that I do this via: System>Administration>Network
However, there is no Network option under System>Administration.
Problem #2: I open Network Manager, which displays a list of networks. I click on mine, configure it with WPA and the right password, and it fails to connect: "The network connection has been disconnected."
View 12 Replies
View Related
