[olug] Ethernet connection

[T. J. Brumfield]

That is all very good advise except I'll throw in that I think
openSUSE ships with dhcpcd instead of dhclient. I could be mistaken
though.

Sent from my iPhone

On Apr 21, 2010, at 10:45 AM, Rob Townley <rob.townley at gmail.com> wrote:

> On Wed, Apr 21, 2010 at 9:16 AM, T. J. Brumfield <enderandrew at gmail.com
> > wrote:
>> Welcome to the list!
>>
>> What I've seen happen from time to time is that when you take a
>> computer
>> from one environment to the next, Networkmanager doesn't always
>> correctly
>> set /etc/resolv.conf which has the DNS settings.
>>
>> You can open up a console and try ifconfig to see your NIC
>> settings. You can
>> then try to ping the ip address of your router/cable modem/whatever
>> at home.
>> You can also try pinging a known ip address like 8.8.8.8 (Google's
>> public
>> DNS server).
>>
>> If you can reach that, your NIC is working, but DNS is not. You may
>> want to
>> look at /etc/resolv.conf
>>
>> There isn't any reason I can imagine that your NIC driver and such
>> works in
>> one environment and not the other.
>>
>> -- T. J. Brumfield
>>
>> On Wed, Apr 21, 2010 at 9:02 AM, <jonsteckelberg at cox.net> wrote:
>>
>>> Greetings,
>>>
>>> This is my first post on this mailing list. I have a problem with
>>> my wired
>>> ethernet connection.
>>> I have a Thinkpad X31 running openSUSE 11.2 KDE.  Actually I am
>>> having
>>> problems with both the wireless and the wired connection but I
>>> want to focus
>>> on the wired at the moment. The problem is that when I connect to
>>> the wired
>>> network at work everything is fine it connects automagically and I
>>> have
>>> internet access but when I plug into my home network it does not
>>> connect.
>>>  It seems like it can not find the network address.
>>> More info;
>>> Thinkpad x31
>>> open SUSE 11.2 KDE
>>> knetwork manager
>>> Home: Cox internet
>>> Router: Netgear WGR614
>>> other computers on home network that work just fine
>>> 2 PC's runnin Linux Mint
>>> 1 PC runin XP (sorry wifes computer)
>>>
>>> Can anyone provide me some assistance?
>>> If you need more info to help solve problem let me know.
>>>
>>> Thanks
>>> Jon Steckelberg
>>> _______________________________________________
>>> OLUG mailing list
>>> OLUG at olug.org
>>> https://lists.olug.org/mailman/listinfo/olug
>>>
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>>
>
> Worse would be when the dhclient part of NetworkManager misses
> something else besides DNS such as the default gateway.  Can you ping
> other hosts on your lan, but not get out of the lan.
>
> #cat /etc/resolv.conf
> #ifconfig -a
> #ip address
> #route
> #ip route show
>
> Compare IP subnet and default gateway to a working machine.
> If it is different, force the dhcp client to renew:
> #dhclient eth0
>
> Stop all networking and restart
> #/etc/init.d/NetworkManager stop
> #/etc/init.d/network stop   (i am assuming this is on suse)
> #/etc/init.d/netplug stop   (you may not have this running which is
> ok)
>
> Change stop to start above.
>
> If dhclient / NetworkManager still isn't giving you the right numbers,
> then it is worth to hunt down any old dhclient related *.lease files
> on your system.  Especially, if at one time, the dhcp server was set
> to hand out leases for a very long time.  On a Fedora 11 system, dhcp
> lease files are stored in /var/lib/dhclient/, so do a #find / -name
> dhc.  Normally, it does not hurt to erase all these files but you may
> want to mv them somewhere under /tmp/oldleases/ in case work does
> something like TLS 802.1x.   You might notice that your home network
> lease has old values for option routers, ns, domain-name, but it has
> not expired yet.
>
> cat /var/lib/dhclient/dhclient-long-ugly-GUID-wlan0.lease
> lease {
>  interface "wlan0";
>  fixed-address 192.168.168.230;
>  option subnet-mask 255.255.255.0;
>  option dhcp-lease-time 86400;
>  option routers 192.168.168.1;
>  option dhcp-message-type 5;
>  option dhcp-server-identifier 192.168.168.1;
>  option domain-name-servers 192.168.168.1;
>  option dhcp-renewal-time 43200;
>  option dhcp-rebinding-time 75600;
>  option domain-name "lan";
>  renew 5 2009/12/25 02:50:46;
>  rebind 5 2009/12/25 13:47:45;
>  expire 5 2009/12/25 16:47:45;
> }
>
> Once these are cleared out, you will probably never have a problem
> again.
>
> If your stuck at home, give me a call 402-522-6266.  i promise i don't
> usually talk as much as i write, but i had a compulsion to do a brain
> dump....just now.
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