Operating Systems > Linux and UNIX
RH 8.0 & networking problems
voidmain:
Just make sure you do a "su -" and not an "su-" (there needs to be a space in there). Did you look at your system log? If there is a problem with the driver or other error messages you will find it there. You might also try and bring the interface up on the command line and see if there are any other messages there:
$ su -
# ifup eth0
[ November 25, 2002: Message edited by: void main ]
Ice-9:
Found some stuff but it really doesn't say much to me :confused:
Here is the result of # tail -f /var/log/messages
[root@localhost root]# tail -f /var/log/messages
Nov 26 01:11:53 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7
Nov 26 01:12:00 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7
Nov 26 01:12:07 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
Nov 26 01:12:15 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 16
Nov 26 01:12:31 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9
Nov 26 01:12:40 localhost dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
Nov 26 01:12:48 localhost dhclient: No DHCPOFFERS received.
Nov 26 01:13:05 localhost su(pam_unix)[1361]: session opened for user root by yc (uid=500)
Nov 26 01:13:13 localhost gconfd (root-1109): GConf server is not in use, shutti ng down.
Nov 26 01:13:13 localhost gconfd (root-1109): Exiting
And when I do ifup eth0 it says "configuration file for eth0 not found"
.....
Now I read that with Red Hat it was best not to configure Nic's at the install and do it afterwards.
It's a long shot but would that maybe help, if I wait until after the install completes and configure my firewall and Nic's then?
[ November 26, 2002: Message edited by: Ice9 ]
voidmain:
quote:Originally posted by Ice9:
Nov 26 01:12:48 localhost dhclient: No DHCPOFFERS received.
--- End quote ---
This says your machine is trying to obtain an IP address via DHCP but is not getting a response from any DHCP server. Usually means the network card is not working, you have a problem with a cable, or there is a problem with the DHCP server.
Do you get a green link light on the device your ethernet card is plugged in to?
It appears that this card is a 100Mbps card only, is the device you are connecting it to capable of 100Mbps? I'm sure it is since you had it working before. You only have one card right?
quote:
And when I do ifup eth0 it says "configuration file for eth0 not found"
--- End quote ---
This is not good at all. This would indicate to me that "/etc/sysconfig/network-scripts/ifcfg-eth0" is missing. That is where all of your settings go for eth0. It's what gets created when you configure your eth0 network interface. I find it hard to believe that it could be missing and yet it still knows that it's configured for DHCP.
quote:Now I read that with Red Hat it was best not to configure Nic's at the install and do it afterwards.
--- End quote ---
Not sure where you read that but I always set up the NIC at install time without trouble.
quote:
It's a long shot but would that maybe help, if I wait until after the install completes and configure my firewall and Nic's then?
--- End quote ---
I actually believe it may be a case of an unsupported NIC. I have searched for the last hour and this does not appear to be a very popular card. There are many many very popular Intel Cards but this thing doesn't seem to be one of them. I even found it on the Intel page.
The Intel support site has Linux drivers for many cards, this one is not listed. Does it show up in an "/sbin/lspci -v" command? I also looked through the kernel source and documentation and I don't see anything specific on it. I am guessing that it uses the eepro100 driver but like I said. No mention of this model. Here is a line from the eepro100.c:
MODULE_DESCRIPTION("Intel i82557/i82558/i82559 PCI EtherExpressPro driver");
Then you have the eepro driver for several 82595 chips and the EtherExpress Pro/10.
So then I searched all over RedHat HCL and this specific card was not listed anywhere. I also did a few Google searches. If you search for the model number only (8460c3) you get 2,400 hits. A bad sign compared to searching for something like 3c905 at 49,200 hits or 3c509 at 74,800 hits.
Believe it or not, this is a fairly reliable indicator as to how compatible your hardware is going to be. Sometimes it's not accurate but often times it is.
You don't have another card lying around do you?
[ November 26, 2002: Message edited by: void main ]
Ice-9:
quote: This says your machine is trying to obtain an IP address via DHCP but is not getting a response from any DHCP server. Usually means the network card is not working, you have a problem with a cable, or there is a problem with the DHCP server.
--- End quote ---
I don't think so, I rebooted WIndows several times and can connect to the net without any problem, in fact I've had the same Nic's for more than a year now, every distro I tried until now recognized the Nic's (Red Hat does too, they're listed properly when I try to configure them)
quote: This is not good at all. This would indicate to me that "/etc/sysconfig/network-scripts/ifcfg-eth0" is missing. That is where all of your settings go for eth0. It's what gets created when you configure your eth0 network interface. I find it hard to believe that it could be missing and yet it still knows that it's configured for DHCP.
--- End quote ---
In fact the second time I tried it it simply said "unable to obtain Ip address for eth0"
quote: I actually believe it may be a case of an unsupported NIC. I have searched for the last hour and this does not appear to be a very popular card. There are many many very popular Intel Cards but this thing doesn't seem to be one of them. I even found it on the Intel page.
--- End quote ---
Again, you might be right but I don't think so, I've had these Nic's (one 100Mbit and one 10/100Mbit) for more than a year and they worked with SuSE, Mandrake and Lycoris, immediately after install and without even having to enter DNS server addresses and stuff like that.
And I do have other Nic's lying around, but all of them are Intel Pila 8460 ....
[ November 26, 2002: Message edited by: Ice9 ]
Edit : typos
[ November 26, 2002: Message edited by: Ice9 ]
voidmain:
Well now I don't know what to say. I didn't see any problem reports on RedHat's bugzilla either. What is the device your machine is connected directly to, a cable or DSL modem? If so, have you tried turning that off for around 1-5 minutes and see if it has any effect? Seems to me we've had very similar problems recenty on this site. Have you tried configuring it with a static IP address and pinging the address of the closest router? Take down the IP settings from your Windows side (ipconfig /all) and use those settings for configuring the card with a static address in RedHat.
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