network not working after reboot

[pernest]

Hi

Using 10.04 happily for some time, I shut the machine down today and when I started it back up there was no network.

I've tried to fix the problem myself, but probably made things much worse! I've tried to reinstall the network manager, manually bring up eth0 with a static ip address (it was happily using dynamic earlier today). I even followed some instructions for manually configuring a network interface added an entry to the routing table (which I suspect will turn out to be a huge mistake). No matter what I have done, I haven't even been able to ping my router.

I would really appriciate it if someone knowledgable would spend the time to help me sort this out.

I am not sure what if any of the following is useful:
my router is 192.168.1.1 and is set up as DHCP server
ifconfig

eth0      Link encap:Ethernet  HWaddr e0:cb:4e:32:2e:10
          inet addre:192.168.1.5 Bcaset:192.168.1.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:22 Base address:0x6000

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
          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:720 (720.0 B)  TX bytes:720 (720.0 B)

route gives:

Kernal IP routing table
Destination   Gateway  Genmask           Flags  Metric  Ref Use Iface
192.168.1.0  *              255.255.255.0   U        0         0    0     eht0
link-local        *              255.255.0.0       U       1000    0    0     eth0

mii-tool gives

eth0: no link
  product info: vendor 00:07:32, model 17 rev 2
  basic mode:   autonegotiation enabled
  basic status: no link
  capabilities: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  advertising:  100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
  link partner: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD

and dhclient gives

Internet Systems Consortium.
All rights reserved.
For info, please visit isc.org/software/dhcp/

Listening on LPF/eth0/e0:cb:4e:32:2e:10
Sending on LPF/eth0/e0:cb:4e:32:2e:10
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 20
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

If there is anything else that I need to post that would help diagnose the problem, then please tell me.

I've also posted on the ununtu forums but my question has sunk without an answer!

I'd really appreciate any help that anyone is able to offer me.

Thanks

Paul

[JosePF]

Hello,
i can see that your route output does not contain the default route:
could you run as root?
route add default gw 192.168.1.1 eth0

I hope this help you but i dont understand your "link-local" route
Regards

[pernest]

I've done what you suggested and route now looks like

Kernal IP routing table
Destination   Gateway  Genmask           Flags  Metric  Ref Use Iface
192.168.1.0  *              255.255.255.0   U        0         0    0     eht0
link-local        *              255.255.0.0       U       1000    0    0     eth0
default          *              192.168.1.1       UG     0          0    0     eth0
default          *              192.168.1.1       UG     100      0    0     eth0

I don't know about link-local either. I'm sure that it wasnt in the routing table before I started messing around, but now I don't know how to get rid of it. I've tried to use the command "route route del" but I don't know how to refer to the entry I want to delete.

Is there a way that I can just do a fresh instal of all networking components? just reset eveything?

Cheers

[JosePF]

Hi, with
route del default gw 192.168.1.1 you will remove it.

Sorry but my table shows:
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 wlan0
and i dont see your default (0.0.0.0) net and gateway.

Regards

[pernest]

I tried that command but my table remains the same. I wanted to know how to get rid of the link-local entry, as you said it shouldn't be there and I thought it wasn't there before I started messing around with the routing table

[pernest]

I tried the command again and it removed the entry
default 192.q68.1.1
from the table (which it looks like it was intended to do)

[JosePF]

Have you configure interfaces in /etc/network/interfaces?if so, could you send what changes?

Cheers

[JosePF]

Ooops,
sorry again, i think that you want to delete de default route:
To delete this "link-local" you should run:
route del link-local netmask 255.255.0.0
and i would try to add again default route

[pernest]

think you might be onto somthing there. It looks like

auto eth0 inet static
iface eth0 inet static
address 192.168.1.5
network 192.168.1.0te
netmask 255.255.255.0
broadcast 192.168.1.255
gateway 192.168.1.1

auto lo
iface lo inet loopback


Before I started playing around with it, it only had the last two lines. I forgot to delete them after that experiment.

[pernest]

I've done what you suggested (I put the also put the gateway back in) so now my routing table just has two entries:

192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
default 192.168.1.1 0.0.0.0 UG 0 0 0 eth0

I've done a network restart, but no signs of life.