No DHCPOFFERS received. No working leases in persistent database - sleeping.

pthalo · 10-14-2009, 10:46 AM

I recently installed Ubuntu on my windows computer, so now I have a debian computer and an ubuntu computer and they're both set up to access the internet with a wired connection. The debian one works fine, but the ubuntu one either connects to the internet or it doesn't. Sometimes if I run sudo ifup -a, sudo ifdown -a, sudo ifup-a, sudo ifdown -a (etc) for a while, it will eventually connect, but never on the first try. I've tried sudo dhclient eth0 too.

/etc/network/interfaces looks like this on both computers:

Code:

auto lo
iface lo inet loopback
iface eth0 inet dhcp

auto eth0

sudo ifup -a gives me:

Code:

Listening on LPF/eth0/00:1a:a0:9f:73:ee
Sending on   LPF/eth0/00:1a:a0:9f:73:ee
DHCPDISCOVER  on  eth0  to 255.255.255.255  port 67  interval  7
DHCPDISCOVER  on  eth0  to 255.255.255.255  port 67  interval  9
DHCPDISCOVER  on  eth0  to 255.255.255.255  port 67  interval  17
DHCPDISCOVER  on  eth0  to 255.255.255.255  port 67  interval  12
DHCPDISCOVER  on  eth0  to 255.255.255.255  port 67  interval  8
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

and then sudo ifdown -a:

Code:

Listening on LPF/eth0/00:1a:a0:9f:73:ee
Sending on   LPF/eth0/00:1a:a0:9f:73:ee
Sending on   Socket/fallback
DHCPRELEASE on eth0 to 192.168.1.1 port 67

This is odd. Anyway, usually I have to do this a few times before it finally does communicate with the router, (and sometimes it'll connect without me having to do anything), but today it just won't, no matter what I do.

After ifup -a, even though it doesn't work,

ping 192.168.1.1 gives me:

Code:

PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
From 169.254.10.214 icmp_seq=1 Destination Host Unreachable

but after ifdown -a, pinging results in:

Code:

connect: Network is unreachable

sudo dhclient eth0 seems to do the same thing as ifup.

The ubuntu computer never had problems connecting to the internet when it was the windows computer, and when it does connect, the router gives it the same IP address it used to give it when it was the windows computer.

I think I'm on my fiftieth ifup ifdown dance, so it's time to try something else.

pthalo · 10-14-2009, 11:03 AM

Also, from dmesg:

Code:

[  3662.253282] e1000e 0000:00:19.0:  irq  25 for MSI/MSI-X
[  3662.308072] e1000e 0000:00:19.0:  irq  25 for MSI/MSI-X
[  3662.309158] ADDRCONF(NETDEV_UP): eth0: link is not ready

pthalo · 10-14-2009, 11:24 AM

well, after about an hour trying "ifup -a" and it not working so "ifdown -a" and then "ifup -a" again:

Code:

pthalo@pthalo-desktop:~$ sudo ifup -a
Internet Systems Consortium DHCP Client V3.1.2
Copyright 2004-2008 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/eth0/00:1a:a0:9f:7e:ee
Sending on   LPF/eth0/00:1a:a0:9f:7e:ee
Sending on   Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
DHCPOFFER of 192.168.1.11 from 192.168.1.1
DHCPREQUEST of 192.168.1.11 on eth0 to 255.255.255.255 port 67
DHCPACK of 192.168.1.11 from 192.168.1.1
bound to 192.168.1.11 -- renewal in 105160 seconds.

this is wonderful, it means my problem is solved for today. But my question is still open because I'm going to have to do this again tomorrow, when I turn my computer on next.

pthalo · 10-15-2009, 12:32 PM

I still need help with this. i'm still getting "ADDRCONF(NETDEV_UP): eth0: link is not ready" in dmesg, and can't connect to the internet.