[opensuse] SuSE cannot restart internet services after network blackout

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Maura Monville

18 Sep 2009 18 Sep '09

14:59

Today the network went down for the whole building. After about 1/2 hour people were able to use the internet again. So was I on my wireless laptop but I am still isolated on my wire (Ethernet) desktop. Both systems are running Linux/SuSE ..... Someone here suggested that Linux looses sone network infor which is written in a /etc system file whenever the network service is interrupted abruptly. Is that true ? I tried to reboot but nothing changed. Why the wireless system has not been affected ? How can I retrieve the lost piece of data ? Thank you so much, Maura -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

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Marco Calistri

18 Sep 18 Sep

15:21

...

Today the network went down for the whole building. After about 1/2 hour people were able to use the internet again. So was I on my wireless laptop but I am still isolated on my wire (Ethernet) desktop. Both systems are running Linux/SuSE ..... Someone here suggested that Linux looses sone network infor which is written in a /etc system file whenever the network service is interrupted abruptly. Is that true ? I tried to reboot but nothing changed. Why the wireless system has not been affected ? How can I retrieve the lost piece of data ?

Thank you so much, Maura

If one machine is working that's a good start point in order to begin investigations :-) Check the wireless network configuration, especially the IP and DNS ones and then replicate it logically, on the wired machine. Other checks must be oriented from the very basic standpoints as: Physical connection from pc to router, switch, outlets... What is the connection device from wired pc toward the outside connection? BR, -- Marco Calistri <amdturion> Hard work spotlights the character of people: some turn up their sleeves, some turn up their noses, and some don't turn up at all. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Maura Monville

20 Sep 20 Sep

13:37

--- Ven 18/9/09, Marco Calistri ha scritto:

...

...
Today the network went down for

Da: Marco Calistri Oggetto: Re: [opensuse] SuSE cannot restart internet services after network blackout A: "opensuse" Data: Venerdì 18 settembre 2009, 15:21 the whole building. After about 1/2 hour people were able to use the internet again. So was I on my wireless laptop but I am still isolated on my wire (Ethernet) desktop.

...
Both systems are running Linux/SuSE ..... Someone here suggested that Linux looses sone network infor which is written in a /etc system file whenever the network service is interrupted abruptly. Is that true ? I tried to reboot but nothing changed. Why the wireless system has not been affected ? How can I retrieve the lost piece of data ?

Thank you so much, Maura

If one machine is working that's a good start point in order to begin investigations :-)

Check the wireless network configuration, especially the IP and DNS ones and then replicate it logically, on the wired machine.

Other checks must be oriented from the very basic standpoints as:

Physical connection from pc to router, switch, outlets...

What is the connection device from wired pc toward the outside connection?

The wired PC is connected through an Ethernet cable to the University server. Thank you, Maura

...

BR,

-- Marco Calistri <amdturion> Hard work spotlights the character of people: some turn up their sleeves, some turn up their noses, and some don't turn up at all. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

-- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Marco Calistri

14:24

Il giorno dom, 20/09/2009 alle 13.37 +0000, Maura Monville ha scritto:

...

--- Ven 18/9/09, Marco Calistri ha scritto:

...
...
Today the network went down for

Da: Marco Calistri Oggetto: Re: [opensuse] SuSE cannot restart internet services after network blackout A: "opensuse" Data: Venerdì 18 settembre 2009, 15:21 the whole building. After about 1/2 hour people were able to use the internet again. So was I on my wireless laptop but I am still isolated on my wire (Ethernet) desktop.

...
Both systems are running Linux/SuSE ..... Someone here suggested that Linux looses sone network infor which is written in a /etc system file whenever the network service is interrupted abruptly. Is that true ? I tried to reboot but nothing changed. Why the wireless system has not been affected ? How can I retrieve the lost piece of data ?

Thank you so much, Maura

If one machine is working that's a good start point in order to begin investigations :-)

Check the wireless network configuration, especially the IP and DNS ones and then replicate it logically, on the wired machine.

Other checks must be oriented from the very basic standpoints as:

Physical connection from pc to router, switch, outlets...

What is the connection device from wired pc toward the outside connection?

The wired PC is connected through an Ethernet cable to the University server. Thank you, Maura

...
BR

It could be that University server is offering DHCP service to the wired PC and that something has changed on the configuration(?) But before to enter into this section, verify all from the very basic: 1 ping from wired.pc to U.server 2 ping from U.server to wired.pc 3 ping from U.server to a internet address (ping google.com) 4 cat /etc/resolv.conf on U.server 5 ping from wired.pc to one of the nameserver of U.server resolv.conf If (as I am thinking) you are working, or you are member/student of a University, ask to an IT "old man" which can guide you better than whomsoever to discover and solve the problem. Good Luck! -- opensuse 11.1 - Linux 2.6.27.29-0.1-default x86_64 AMD Turion(tm) 64 Mobile Technology MK-36 - GeForce Go 6150 Gnome 2.26.3

Carlos E. R.

18 Sep 18 Sep

18:27

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Friday, 2009-09-18 at 14:59 -0000, Maura Monville wrote:

...

Today the network went down for the whole building. After about 1/2 hour people were able to use the internet again. So was I on my wireless laptop but I am still isolated on my wire (Ethernet) desktop. Both systems are running Linux/SuSE ..... Someone here suggested that Linux looses sone network infor which is written in a /etc system file whenever the network service is interrupted abruptly. Is that true ? I tried to reboot but nothing changed. Why the wireless system has not been affected ? How can I retrieve the lost piece of data ?

Perhaps the building network configuration has changed. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) iEYEARECAAYFAkqz0QMACgkQtTMYHG2NR9WzOQCfQTZTHkHxeeDIIHK0j39z+BRW XwgAn0tluooMDj4LzlJ+X4kmEucJGf2F =T+Ch -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Maura Monville

20 Sep 20 Sep

13:42

--- Ven 18/9/09, Carlos E. R. ha scritto:

...

Da: Carlos E. R. Oggetto: Re: [opensuse] SuSE cannot restart internet services after network blackout A: "OS-en" Data: Venerdì 18 settembre 2009, 18:27 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

On Friday, 2009-09-18 at 14:59 -0000, Maura Monville wrote:

...
Today the network went down for the whole building. After about 1/2 hour people were able to use the internet again. So was I on my wireless laptop but I am still isolated on my wire (Ethernet) desktop. Both systems are running Linux/SuSE ..... Someone here suggested that Linux looses sone network infor which is written in a /etc system file whenever the network service is interrupted abruptly. Is that true ? I tried to reboot but nothing changed. Why the wireless system has not been affected ? How can I retrieve the lost piece of data ?

Perhaps the building network configuration has changed.

No change. I was told Linux (maybe most distributions) looses some network configuration data that is in a system file of the /etc directory. But no one knows the file name and what is lost on a sudden blackout Maura

...

- -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux)

iEYEARECAAYFAkqz0QMACgkQtTMYHG2NR9WzOQCfQTZTHkHxeeDIIHK0j39z+BRW XwgAn0tluooMDj4LzlJ+X4kmEucJGf2F =T+Ch -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

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Per Jessen

14:08

Maura Monville wrote:

...

I was told Linux (maybe most distributions) looses some network configuration data that is in a system file of the /etc directory. But no one knows the file name and what is lost on a sudden blackout Maura

I wouldn't listen much to whoever told you that. /Per -- Per Jessen, Zürich (20.3°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Carlos E. R.

15:08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sunday, 2009-09-20 at 13:42 -0000, Maura Monville wrote:

...

...
Perhaps the building network configuration has changed.

No change.

...

I was told Linux (maybe most distributions) looses some network configuration data that is in a system file of the /etc directory. But no one knows the file name and what is lost on a sudden blackout

I don't think so. /etc holds static configuration dta, nothing can be lost there. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) iEYEARECAAYFAkq2RV4ACgkQtTMYHG2NR9Xi8wCfYQEP+ESy5Z6KXJqGEzisS/3D 5lAAnA43QMSi542RiExzLoGnAkwCzWIP =QdoJ -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Basil Chupin

21 Sep 21 Sep

02:23

Carlos E. R. wrote:

...

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

On Sunday, 2009-09-20 at 13:42 -0000, Maura Monville wrote:

...
...
Perhaps the building network configuration has changed.

No change.

...
I was told Linux (maybe most distributions) looses some network configuration data that is in a system file of the /etc directory. But no one knows the file name and what is lost on a sudden blackout

I don't think so. /etc holds static configuration dta, nothing can be lost there.

There is something not going quite right here in regards to 11.1 (don't know about 11.2). My wife and I are each connected directly to the modem/router. She is running KDE4.2 while I am running KDE4.3.1. We are both running knemo to monitor our traffic. When we lose connection to the internet and then the line comes back up again she is unable to connect to another URL, not even our own ISP (error message: "Server not found") when she tries to refresh the page although she is already on our ISP's site. The KDE network monitor shows that there is no network connection (to the modem/router) (eth0 state: disconnected) and knemo shows that she has no IP address (she's usually 192.168.1.xx; the only info showing is the NIC address). She has to either reboot her computer or logout and login in before she is able to access any URL. On the other hand, I don't have this problem. BC -- Never run yourself down - let other people do it instead. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Patrick Shanahan

02:44

* Basil Chupin [09-20-09 22:27]:

...

She has to either reboot her computer or logout and login in before she is able to access any URL. On the other hand, I don't have this problem.

rcnetwork restart ?????????? -- Patrick Shanahan Plainfield, Indiana, USA HOG # US1244711 http://wahoo.no-ip.org Photo Album: http://wahoo.no-ip.org/gallery2 Registered Linux User #207535 @ http://counter.li.org -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Basil Chupin

03:17

Patrick Shanahan wrote:

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* Basil Chupin [09-20-09 22:27]:

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She has to either reboot her computer or logout and login in before she is able to access any URL. On the other hand, I don't have this problem.

rcnetwork restart ??????????

THAT'S what I was lookng for :-) . Thanks, Patrick. However, the question remains as to why 11.1 loses the connection and then cannot reconnect -- but could do so until quite recently. BC -- Never run yourself down - let other people do it instead. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

John Andersen

24 Sep 24 Sep

22:47

Basil Chupin wrote:

...

Carlos E. R. wrote:

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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

On Sunday, 2009-09-20 at 13:42 -0000, Maura Monville wrote:

...
...
Perhaps the building network configuration has changed.

No change. I was told Linux (maybe most distributions) looses some network configuration data that is in a system file of the /etc directory. But no one knows the file name and what is lost on a sudden blackout I don't think so. /etc holds static configuration dta, nothing can be lost there.

There is something not going quite right here in regards to 11.1 (don't know about 11.2).

My wife and I are each connected directly to the modem/router. She is running KDE4.2 while I am running KDE4.3.1. We are both running knemo to monitor our traffic.

When we lose connection to the internet and then the line comes back up again she is unable to connect to another URL, not even our own ISP (error message: "Server not found") when she tries to refresh the page although she is already on our ISP's site. The KDE network monitor shows that there is no network connection (to the modem/router) (eth0 state: disconnected) and knemo shows that she has no IP address (she's usually 192.168.1.xx; the only info showing is the NIC address). She has to either reboot her computer or logout and login in before she is able to access any URL. On the other hand, I don't have this problem.

BC

Reset your router. No need to mess with your computer. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

James Knott

20 Sep 20 Sep

15:47

Maura Monville wrote:

...

...
No change. I was told Linux (maybe most distributions) looses some network configuration data that is in a system file of the /etc directory. But no one knows the file name and what is lost on a sudden blackout

I have connected Linux on many networks and never had such an issue. However, one thing you could try is to use Wireshark to see what's happening on the network. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Constantinos Galilei

21 Sep 21 Sep

03:56

On Friday September 18 2009 9:59:28 am Maura Monville wrote:

...

Today the network went down for the whole building. After about 1/2 hour people were able to use the internet again. So was I on my wireless laptop but I am still isolated on my wire (Ethernet) desktop. Both systems are running Linux/SuSE ..... Someone here suggested that Linux looses sone network infor which is written in a /etc system file whenever the network service is interrupted abruptly. Is that true ? I tried to reboot but nothing changed. Why the wireless system has not been affected ? How can I retrieve the lost piece of data ?

Thank you so much, Maura

I just caught and read this thread. Other people have given good advice, but I'd like to add that sometimes flaky hardware will... well, flake out. The NIC may not be properly sending a wakeup or is failing when the system tries to restart services the first time (if, say, the card is slow to establish protocol). Maybe a small script that tests for a network connection and restarts services if found could set to run occasionally by cron. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

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participants (9)

Basil Chupin
Carlos E. R.
Constantinos Galilei
James Knott
John Andersen
Marco Calistri
Maura Monville
Patrick Shanahan
Per Jessen