Ubuntu Networking :: Wired Network - Can't Get The IP From Dhcp Server (TW-EA510) And Static Settings Doesn't Work
Feb 16, 2011
I'm having mysterious wired network problem with my Karmic/9.10 machine. It hasn't been in network a while, but now I finally got the cabling done. I can't get the IP from dhcp server (TW-EA510), and static settings doesn't work either. Fresh cabling showed OK 1Gb connection on tester, and win7 laptop works fine. I even tried with long cable though the rooms, but it doesn't help, so it definately isn't the new cabling.
Log from the router after issuing #"dhclient":
Feb 16 23:01:43 DHCP SERVER: DHCPDISCOVER from 00:01:29:fb:c5:d1 via br0
Feb 16 23:01:43 DHCP SERVER: DHCP offer to 00:01:29:fb:c5:d1
Feb 16 23:01:49 DHCP SERVER: DHCP request from 00:1b:ea:c8:a0:ba
Feb 16 23:01:49 DHCP SERVER: DHCP ack to 00:1b:ea:c8:a0:ba
Feb 16 23:01:54 DHCP SERVER: DHCPDISCOVER from 00:01:29:fb:c5:d1 via br0
Feb 16 23:01:54 DHCP SERVER: DHCP offer to 00:01:29:fb:c5:d1
Feb 16 23:02:03 DHCP SERVER: DHCPDISCOVER from 00:01:29:fb:c5:d1 via br0
[Code]....
Motherboard is some old Lanparty with two ethernet ports, NVidia CK804 and Marvell 88E800 rev 13 Gigabit netwok adapters, neither of them works. At least another of them has been worked earlier when I last got it wired. It's been a while, so I'm not sure which one of them and with different router if that matters.
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Jan 27, 2010
I've been using slackware for many years. I think I started with Slack 8. I know how to configure the network, I've had this same POS Dell computer for a few years now but the other day I tried to go to a different distro (first mistake) everything worked fine but it was not for me. Once you go slack you never go back! Anyway I had slack on here prior to the change and it all worked fine. I'm running slack 13 and all of a sudden my network is slow as balls! I set it up as I always have so I did some research and tried a few things, nothing worked. So i enabled DHCP and its fine now.. I have a dell xps 420. onboard intel nic. worked fine when i first installed slack 13. Anyone have any clue what to do? I would like my static IP on this machine.
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Oct 27, 2010
I want my netbook to connect automatically to both the office wired/static network and to the usual wired/DHCP networks.
wicd is wicked but netsearching hasn't revealed how to configure it for both wired/static and wired/DHCP except by manually switching profiles.
wicd's profiles can use pre/post(dis)connect scripts but I don't know how to integrate them into wicd when they are upping/downing connections on cable (un)plugging.
If it is not practical to solve this within wicd, I'll explore standalone scripts to configure eth0 on cable (un)plugging, as detected by ifplugd.
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May 4, 2010
I installed Ubuntu10.04, It cannot driver Wired network and wireless. Later I installed linuxMint9, wireless is ok, but wired network doesn't work. I am sure the lan cable is ok. It works in Windows.
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Feb 14, 2011
what is the command to restart the network services? ive forgotten i think it uses -hup switch though. about 1 in 20 boots on my desktop ubuntu system results in the system insisting its no longer on a network yet has a fully functioning network card. a reboot always fixes the issue but that doesnt seem like a long term solution to me. If I ping a neighbouring system I get nothing. (sent packet count increases in ifconfig) If I ping from a neighbouring system back to my desktop I get nothing (no change in packet count) I can bring down and back up the network interface with no results. A sniffer shows the system definitely isnt sending anything out Everything worked previous boot and will work again after a reboot.
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Dec 6, 2010
My desktop PC has 2 NICs. I have Ubuntu on it since several years, and I remember that both eth0 and eth1 used to work. However, I discovered recently that currently only eth0 works, and eth1 is dead, but I don't know why. It's been a while since I've tried eth1, so I have no idea when exactly it broke. I suspect the problem may be related to the fact that the MAC address is incorrect: it is set to 00:00:00:00:00:00, which seems wrong. But I have no idea how this happened...Any idea what might be wrong and how I can fix it? Here is some output which I think is useful:
Code:
peter@cheetah:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:18:f3:68:42:78
[code]....
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Mar 21, 2009
Yes, another newbie question. Just loaded and updated FC 10. Everything works great with dhcp. Tried to setup static ip to learn more about how to set it up and nothing seems to work. I'm connected to DSL via a router when I ifconfig I get:(basic stuff)inet addr: 192.168.1.7 Bcast: 192.168.1.255 Mask: 255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
I have also tried default gateway 192.168.1.255 and 192.168.1.254.Most of what I have tried above has come from linux websites and faq's.Keeping in mind I am worst than any new newbie you have ever worked with
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May 28, 2009
I can access internet when my eth0 is set toDHCP client. But when I set static I can ping goole.com... but my Firefox browser doesn't connect to Interent!
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May 26, 2010
I am having several boxex with centos on it. No pb. I have recently setup a new box with centos 5.4 and I am not able to get the network working on it when configuring a static ip.I've configured eth0 and dns using "setup": unsuccessfulI've used the network config GUI: unsuccessfulAnd it is working very well when I let the dhcp getting the setting.I need a static IP.Here is the getinfo output when static ip setup, and below it, the getinfo for dhcp setting
== BEGIN uname -rmi ==
2.6.18-194.3.1.el5 i686 i386
== END uname -rmi ==
[code]....
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Apr 19, 2010
I decided to take the plunge and change the existing static ip configuration for my home network to a dynamic (DHCP) configuration. The DHCP server in this new network config is my gt701-wg actiontec DSL modem.
[Code]....
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Jun 5, 2010
I have a Zotac Ionitx A-U. I can't get it to establish an internet connection with the wired ethernet within Ubuntu. The chip is detected, but trying to bring up the connection stalls out at trying to obtain a DHCP lease, like this:
DHCP DISCOVER ...
DHCP DISCOVER ...
No DHCPOFFERS received
Specs:
Ionitx A-U
Ubuntu 10.04 x64 kernel 2.6.32-22 (also didn't work in 9.10)
[Code]...
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May 10, 2010
I'm trying to install CentOS 5.4 from my local repo, booting the server from centos54-netinstall iso (vmware). I write "linux URL..." during boot. I eventually get prompted for network config, where I choose manual configuration. Hitting OK ignores my config and defaults back to dhcp, which won't work since I don't have any dhcp server available.Whats wrong? Is there a bug in anaconda?
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Aug 17, 2010
I have 2 Ethernet connections, one (eth0) for the internet which gets set with dhcp, and one (eth1) for my internal network on which I have dhcp3-server running. I set eth1 to use static IP in interfaces, but every time I reset the network, it is fine for a couple of minutes, and switches over do being served by my own dhcp server on the same machine. (the interfaces file clearly says "iface eth1 inet static")
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Dec 9, 2010
Fresh install of 10.04.1 server; installs seamlessly; finds network no problem.
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I have two files in /etc/network ... interfaces and interfaces~ (one static and the other dhcp). I can switch them in and out of play. The dhcp works and pings out like a champ. static is dead, just dead. Cannot ping router ... nothing.
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Sep 1, 2011
I assigned a static ip to my Ubuntu Server machine and it cannot access the web now. It can access anything on the LAN. The other two nodes on the network (one wifi one hardwired) can both access the web just fine.
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Nov 10, 2010
I have an Ubuntu Server 10.04.1 that I have given a static IP address. Every six hours or so I will lose connectivity to it and when I type ifconfig to look at the network information, it has been given an address via dhcp. If I run the /etc/init.d/networking restart command the IP address goes back to my static address and things are fine for another 6 hours or so. Here is what is in my interfaces file:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 10.60.82.15
netmask 255.255.0.0
broadcast 10.60.255.255
gateway 10.60.254.254
This machine is also a DHCP server and I checked to make sure there are no other DHCP servers on my network. Right now my fix is to have a Cron job running that runs the reset command every 5 hours, but I would like to find a more permanent solution.
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Jul 30, 2010
I have installed Lucid in a new laptop. Things are running OK except for the following problem:
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Just for clarity, I am using the following commands to re-configure my network everytime:
Also note that I have already tried editing the /etc/network/interfaces and the /etc/resolv.conf files. But it seems that these are not being picked or are being overridden.
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I recently tried out OpenDNS on my wired connection, however after it was slower than faster, I tried going back to the original settings that the connection had (so basically to Automatic DHCP).
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My wireless still works fine however.
I'd very grateful as i'm worried i've messed up the ethernet port and I need it for when I got University in a couple of weeks
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Jul 6, 2011
These days I wanted to connect to the internet on my laptop using a wired connection. When I inserted the ethernet cable, I was surprised to see that it doesn't work on Ubuntu 11.04. So I decided to boot into Windows and see if it works or not. And I found that it works without problems on Windows.
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Dec 16, 2010
Version 10.04 LTS. Installed desktop version and network worked but I needed a static IP address and the install configures for a DHCP configured address. I tried changing to static address using the System->Preferences->Network Connections application but was unable to get the system to come up with the network up.
So I manually modified the /etc/network/interfaces and the /etc/resolv.conf files. I restart the system but when I do an ifconfig, I don't see a configured IP address on eth0 (only the loopback address). If I run /sbin/ifup eth0 everything then works fine and ifconfig shows the correct address bound to eth0.
My files are as follows:
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Jul 25, 2011
I have installed Ubuntu 11.04 using Wubi through Windows 7. It seems to be working but it will not connect to my wired internet connection. It tells me there is no wired connection, when there is. I used sysinfo and its not showing any network adapter or controller. I have a board with nvidia nforce go 430, could it be a driver issue. It works fine in windows though. Tried using a wireless adapter and all is working. But why doesn't the wired ethernet connection work.
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Jan 9, 2011
I just finished installing Ubuntu 10.10 64bit. During installation Ubuntu was connected to the network and was downloading updates. After rebooting though, it cannot connect to the network.
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Mar 7, 2010
I got a problem about network proxy setting. With the graphics setting interface, I set auto proxy with the URL address but it is weird that the setting only work with eth1(wireless), doesn't work with etho(wired). however my wireless driver is always a problem for Linux. i also tried export http_proxy= XXXXX:8080 it still doesn't work at all.
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Mar 12, 2009
I cannot get static addresses to work on eth0 and eth1. eth0 seems to use DHCP while eth1 uses the static information. Sometimes the static info is used but the interfaces get the addresses reversed.
From /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=mosaic
[code]....
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May 30, 2010
My wired network is not working! This is the result of ifconfig -a:
Code:
eth0 Link encap:Ethernet HWaddr 00:1c:25:3e:fe:50
inet6 addr: fe80::21c:25ff:fe3e:fe50/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
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Oct 11, 2010
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Jul 17, 2009
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I'm maintaining a very modest network at home, with OpenSUSE as OS on the server. I got the DHCP and routing working by following the instructions in the wiki. However, every time I run dhclient on the server/router, it appears my own DHCP server assigns an address to the internal network card despite the fact I specifically assigned it to be static using Yast. The situation resolves itself when I restart the network services with the command /etc/init.d/network restart. Otherwise no problem, but it also seems the internal network card gets a "new" IP from my server every time the external card requests one from the ISP. This is more of an issue.
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