Can't get IP by DHCP (Wired network)

[Bondarenko Dmitry]

Hi All!!!

I'm having a little trouble. I have ubuntu 7.04 on my laptop with an
ethernet modem (seen as a wired connection). I'm getting my IP by DHCP. On
my win XP it is done very quickly with no trouble. But on my Ubuntu it is
not .

I can see the modem, I can ping and access my gateway(my modem) in firefox
(so I can reset the modem from the laptop or do any settings). When I
connect to my modem, in it's settings it is said that my MAC is
'Proprietary', so all seems good.

Everything seems great, but after I try to connect, it says that 'You are
connected to wired network', but I get almost all ip adresses equal to '
0.0.0.0' in network manager. Seems like dhcp client does something wrong
maybe.... Because the gateway itself is 100% working and I get my IP
normally on winXP (just plug in the cable to my PC with XP and it's working.
Plug in into my laptop with ubuntu - doesn't work )...

The dhcp server sends the IP addresses by the MAC addresses. The MAC address
is registered by my ISP, so it must be known on the other side.

My modem (which is actually my gateway, which, I believe, should give me the
IP using DHCP) is Motorola Cable Modem SB5101

Here is some data, which is taken after I try to connect and get all IPs '
0.0.0.0' in network manager:



$ ifconfig -a
eth1 Link encap:Ethernet HWaddr 00:16:36:4D:CF:3A
inet6 addr: fe80::216:36ff:fe4d:cf3a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5267 errors:0 dropped:0 overruns:0 frame:0
TX packets:495 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:447752 (437.2 KiB) TX bytes:69316 (67.6 KiB)
Interrupt:17

eth1:avah Link encap:Ethernet HWaddr 00:16:36:4D:CF:3A
inet addr:169.254.5.200 Bcast:169.254.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:17

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:171 errors:0 dropped:0 overruns:0 frame:0
TX packets:171 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:15536 (15.1 KiB) TX bytes:15536 (15.1 KiB)
$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth1
iface eth1 inet dhcp

auto eth2
iface eth2 inet dhcp

auto ath0
iface ath0 inet dhcp

auto wlan0
iface wlan0 inet dhcp


iface eth0 inet dhcp
address 87.237.115.100
netmask 255.0.0.0
gateway 87.237.115.1







auto eth0
$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
link-local * 255.255.0.0 U 0 0 0 eth1
default * 0.0.0.0 U 1000 0 0 eth1
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