L.S.

After upgrading from kernel 2.4 to 2.6.5 with apt-get my internet connection is gone. I receive internet via a 'Sitecom' router. My ethernet card seems to work (it is detected and the driving modules are active). I did some searching, tutorials as well as fora, but I didn't find the information I need.

After doing "inconfig eth0 up" typing "ifconfig" gives

eth0 Link encap:Ethernet HWaddr 00:E0:4C:43:BD:A1
inet6 addr: fe80::2e0:4cff:fe43:bda1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:756 (756.0 b)
Interrupt:5 Base address:0x1400

When I ping to my router I get 'network unreachable'. With kernel 2.4 everything works. On typing ifconfig in 2.4, I get:

eth0 Link encap:Ethernet HWaddr 00:E0:4C:43:BD:A1
inet addr:192.168.0.2 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:1415 (1.3 KiB) TX bytes:996 (996.0 b)
Interrupt:5 Base address:0x1400

(192.168.0.1 is the router IP). I can see that some stuff changed, I don't know why and how to change it back.

Also, when I type 'ifdown -a' and then 'ifup eth0' I get 'unrecognised kernel version'. When I then again do 'ifup eth0' I get 'ifup: interface eth0 already configured'. My /etc/network/interfaces is the same as before migration:

# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)

# The loopback interface
auto lo
iface lo inet loopback

# The first network card - this entry was created during the Debian installation
auto eth0
iface eth0 inet dhcp

Thanks in advance for helping.

Kees de Meijere, linux novice

You have IPv6 support compiled into your kernel - perhaps you didn't add IPv4 support?

I think I just did the same thing. How embarrassment. Thing is, I installed 2.6.6-1 from a kernel-image from debian. Shouldn't that have been precompiled with IPV4? Guess the question needs to be asked over in the Debian forum. That'll teach me to blindly install an image

Thanks for the reply. Ok, so I should add IPv4 support. I just made a custom Kernel (2.6.6) but I didn't see an option 'IPv4 support' or 'IPv6 support'. How does it work?

Incidentally, I have no internet either on this custom Kernel.

Bye,

Kees

Under make xconfig - Device Drivers -> Networking Support -> Networking Options -> TCP/IP Networking
or CONFIG_INET in the .config file, I believe.

Or you might just need a newer version of the net-tools package or ifconfig...