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-   -   Intermittent LAN connection booting Fedora 13 (https://www.linuxquestions.org/questions/linux-newbie-8/intermittent-lan-connection-booting-fedora-13-a-835991/)

czl 10-03-2010 07:48 PM

Intermittent LAN connection booting Fedora 13
 
Hello
I am looking for help with a curious problem. From time to time I have no connection to the net after booting the machine. This is a wired connection that goes through a switch, then a router to a DSL modem.

When there is no automatic connection, I can't connect manually either However if I re-boot the connection works normally.

The Network Connection indicates eth0 and eth1 are both set at "Auto"
Strangely the "Last Used" column indicates "Never" for both even when I am actually connected, and on line.

Any clues you could give me would be greatly appreciated.

Tinkster 10-04-2010 11:59 PM

Not much to go by; your distro uses "Network Mangler, errh, Manager"?

Either way - what does the physical link light say when you can't connect?
And - instead of the gui tools - what do good old ifconfig & ethtool have
to say about the adapters and their status?

Which of eth0 and eth1 is actually connected to the router?



Cheers,
Tink

prayag_pjs 10-05-2010 12:13 AM

Try

Quote:

sudo system-config-network
select eth0

and check the option
Quote:

Activate device when computer starts
also disable the selinux and firewall

Hope there is no hardware problem (like LAN card,LAN cable or switch)

czl 10-05-2010 02:51 PM

[QUOTE=Tinkster;4117905]Not much to go by; your distro uses "Network Mangler, errh, Manager"?

Either way - what does the physical link light say when you can't connect?
And - instead of the gui tools - what do good old ifconfig & ethtool have
to say about the adapters and their status?

Which of eth0 and eth1 is actually connected to the router?

Thanks for your interest.

Unfortunately I don't have much to go on myself. Having minimal Linux experience doesn't help. Your "network mangler" descriptive seems apt, as it is lying to me. When the connection functions, as now, it is always connected to eth1'. Not withstanding, if I check the menu item System / Preferences / Network connection, the "Last Used" column shows that neither eth0 or eth1 have ever been used. Not a confidence builder. All the available menus from this point are either automatic, or blank.

Hardware is not an issue. Both the second computer, printer, and the IPTV box are live and on line while the Linux box is unable to connect. Just to be certain, I swapped all the ports around, but it does not resolve the problem.

Am I wrong in thinking that boot script may have a bearing on this?

Regards
Laz


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