Mandrake fails to bring up eth0

9re9 · 08-28-2004, 08:04 PM

I'm new to Mandrake. I have successfully installed v.10, but am unable to connect to the Internet.

On boot, M10 fails to bring up eth0. In MCC, my NIC is recognized (Realtek 8139), but I can't connect. I've done some research, but can't solve the problem. I can ping localhost, but when I try to execute ifconfig or route bash tells me the commands are not found.

My DHCP router (Dlink 713-P) is correctly configured as far as I can tell, though it doesn't see my Mandrake box's NIC. I've manually entered the MAC address, but that doesn't seem to help.

One last thing - when I enter the network settings manually, the computer is sending packets, but does not receive any. When I've done this, M10 manages to bring up eth0 on boot, but I'm still not able to receive packets after reboot.

Any help would be much appreciated. I've heard great things about Mandrake, but if I can't get this resolved soon, I'm going to give SuSE a try.

Thanks in advance.

michaelk · 08-28-2004, 08:24 PM

ifconfig and route is not in a users path environment. Use the full path /sbin/ifconfig. My first guess would be a firewall is blocking DHCP.

9re9 · 08-28-2004, 09:19 PM

Thanks for the reply.

I forgot I wasn't logged in as root. When I run ifconfig, I get

etho Link encap:Ethernet HWaddr 00:30:1B:3B:77:50
inet6 addr: fe80: : 230:1bff:fe3b:7750/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:4827 dropped:0 overruns:0 frame:0
TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:4140 (4.0 Kb)
Interrupt:11 Base address:0xd000

lo Link encap:Local Loopack
inet addr: 127.0.0.1 Mas:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP BROADCAST RUNNING MTU:16436 Metric:1
RX packets:98 errors:0 dropped:0 overruns:0 frame:0
TX packets:98 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:6420 (6.2 Kb) TX bytes:6420 (6.2 Kb)

I'm pretty sure it's not a firewall issue at this point because I'm not even getting assigned an IP through DHCP, and I have Mandrake's firewall turned off.

courtrrb · 08-28-2004, 10:38 PM

Turn off the hotplug in the network configuration in the MCC. . Evey System I have I have to turn it off to get network activity.

9re9 · 08-29-2004, 10:42 AM

It's off.

Any other suggestions?

9re9 · 08-29-2004, 04:02 PM

OK. I've done more research, and have turned off IPv6 in /etc/modprobe.conf , and have tweaked /etc/sysconfig/network-scripts/ifcfg-eth0.

When I run dmesg I am told, among other things

Code:

eth0: link up, 100Mbps, full-duplex, lpa 0x45E1

However, after restarting network services, and rebooting (at which point eth0 loads quickly) I am still unable to connect. I can't even ping my router - I'm told destination is unreachable. Any other suggestions?

Thanks.

Harnic · 08-29-2004, 07:41 PM

Thankyou CourtrrbI I am new to Linux & was having trouble getting eth0 to load at the startup too. Disabling hotplug did it for me!

9re9 · 08-30-2004, 07:31 AM

I'm still stuck... Some more info.

When I don't edit /etc/modprobe.conf - which seems to leave IPv6 enabled, and run route, M10 returns the following:

Code:

Kernel IP routing table
Destination          Gateway          Genmask          Flags         Metric         Ref         Use         Iface
192.168.0.0         *                      255.255.255.0  U               0                0             0            eth0
127.0.0.0             *                      255.0.0.0          U               0                0             0            lo
default                 192.168.0.1     0.0.0.0              UG             0                0             0            eth0

However, when I edit /etc/modprobe.conf - to turn off IPv6, I get the following:

Code:

Destination          Gateway          Genmask          Flags         Metric         Ref         Use         Iface
192.168.0.0         *                      255.255.255.0  U               0                0             0            eth0
127.0.0.0             *                      255.0.0.0          U               0                0             0            lo

My router is at 192.168.0.1

Hopefully someone can pull some useful info out of this. Thanks.

barrys · 08-30-2004, 07:48 AM

I am making a guess but your config says you are connected.

I suspect your dns is not setup yet. ping a number not a name.

The ping with an ip number does not do lookup in the dns and if the servers are not listed then you can not connect to a dns name.

It could also be a router problem if you have disabled the dhcp in your router.

Enter in your browser a ip address such as 62.3.99.219

If this works you haven't enabled dhcp in your MCC
go back to mcc and add a new connection this time adding dhcp you can get the connection but on man 10 you need to reboot for the DHCP to load the
dns server address's.

You could enter them manually if you have them, but shouldn't need to.

9re9 · 08-30-2004, 09:21 AM

Thanks for your feedback.

Unfortunately, I have manually configured all of the settings - IP, Gateway, Mask and DNS. Still no luck. In addition, I can't ping the router, the IP address you suggested - anything other than localhost.

Interestingly, my router doesn't even see my Linux box's NIC. I thought it might be that I have enabled Access Control on my router. (In other words, unless you enter the MAC address of a NIC, it can't associate or connect to the router.) I have manually entered the MAC address into this configuration, and I have turned the feature off, neither of which has resolved the problem. However, given the huge number of people who are having trouble connecting to the Internet with Mandrake, I suspect the problem lies elsewhere.

Any other suggestions?

Thanks again.

9re9 · 08-30-2004, 03:23 PM

One last comment, really this is a *bump*, but it might help.

If I try and ping my ISP's DNS servers, I get the following:

Code:

connect: Network is unreachable

Has anyone every seen this before, and know to what it is attributable?

Thanks.

zionz · 08-30-2004, 03:30 PM

I get that message when i enabled the firewall, it is called shorewall, i used "shorewall stop".

9re9 · 08-30-2004, 03:48 PM

Even after stopping shorewall I get the same error.

Also, after following the advise in another post, I have no checkboxes checked in the MCC firewall panel.

9re9 · 08-31-2004, 09:18 AM

Thanks to those who tried to help. This was obviously an obscure issue.

It turns out that I was able to access the Internet by turning off full duplex / autodect.

If you have a RealTek 8139 NIC, and also cannot connect to the internet, do the following:

1. Install ethtool from Disc 4
2. Launch your terminal
3. su to root
4. Type: ethtool -s eth0 speed 10 duplex half autoneg off
5. ping your router

You should be good to go.

Hope this helps prevent some other folks from tearing their hair out.

snt · 08-31-2004, 09:30 AM

MCC --> Boot --> Bootloader

Check 'Force no APIC'.

Reboot.