Understanding my recurrent network connectivity problems
in [Debian]
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From: Merciadri Luca on 25 Jun 2010 10:10 green wrote: > Merciadri Luca wrote at 2010-06-25 04:57 -0500: > > > You've probably already checked this, but is the switch connected to a LAN port > on the router and the modem connected to the WAN port? If the modem were > connected to a LAN port, then that puts 2 DHCP servers on one network and > causes weirdness. > Nice idea to check this. I checked, and the physical configuration is okay. -- Merciadri Luca See http://www.student.montefiore.ulg.ac.be/~merciadri/ I use PGP. If there is an incompatibility problem with your mail client, please contact me.
From: Merciadri Luca on 25 Jun 2010 10:10 Anand Sivaram wrote: > Do you have lights (led light) for each of your rj45 ports? Have you > seen the output of them when you say that you can not access your > router/other computers? Yes. LEDs are still ok when this happens. > Try installing "ethtool" on your debian and see "ethtool eth0" (or > whatever interface) during that time to see link is up. What about > pinging your router/computer at that time? Thanks. I'll try to ping it when it fails. I'll also try ethtool. Thanks. -- Merciadri Luca See http://www.student.montefiore.ulg.ac.be/~merciadri/ I use PGP. If there is an incompatibility problem with your mail client, please contact me. Remember, no one can make you feel inferior, without your consent.
From: green on 25 Jun 2010 10:10 Merciadri Luca wrote at 2010-06-25 04:57 -0500: > For one week now, I sometimes `loose' any access to the LAN and the WAN. > Here is the way I am connected to the Internet: > > ISP (house's wall) -> ISP modem (RJ-45) -> D-Link DIR-635 router (RJ-45) > -> Switch (RJ-45) -> 192.168.0.101 (this computer). > > When trying to use my Internet connection, I sometimes encounter some > load page error from Firefox. Checking the modem's LEDs, I notice that > the RECEIVING and SENDING LEDs are then constantly lighted. Well, this > is not normal. I then try to go to my router's webpage, i.e. 192.168.0.1 > (this is my (LAN) DHCP server for 192.168.0.101 -> 192.168.0.111), and > it does not load. I then reset the router, and everything then works > right once the router has acquired the IP from my ISP's DHCP server. But > if I switch off the router, say, for 10 mins, for example, the modem > continues lightning its LEDs. But when the router is re-plugged, and an > IP address is acquired from my ISP's DHCP server, the modem turns off > the two respective LEDs, and everything is okay on the computers. You've probably already checked this, but is the switch connected to a LAN port on the router and the modem connected to the WAN port? If the modem were connected to a LAN port, then that puts 2 DHCP servers on one network and causes weirdness.
From: Camaleón on 25 Jun 2010 10:30 On Fri, 25 Jun 2010 16:00:26 +0200, Merciadri Luca wrote: > Camaleón wrote: >> I am not familiar with you setup as I use "all-in-one" devices (ADSL >> bundled modem-router) and in my case, yes, sometimes the modem-router >> gets "stuck" and I have to powercycle the device to get it operative >> again. >> >> > Okay. But then, how would you explain the modem LEDs to be constantly > lighted when nothing works? It can be receiving traffic from the ISP itself (assigning IP/DNS/gateway data to the device, validating a PPPoE login session, etc...). Greetings, -- Camaleón -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/pan.2010.06.25.14.24.02(a)gmail.com
From: H.S. on 25 Jun 2010 11:00
On 06/25/10 05:57, Merciadri Luca wrote: > Hi, > > For one week now, I sometimes `loose' any access to the LAN and the WAN. > Here is the way I am connected to the Internet: > > ISP (house's wall) -> ISP modem (RJ-45) -> D-Link DIR-635 router (RJ-45) > -> Switch (RJ-45) -> 192.168.0.101 (this computer). > <SNIP> > > I can't understand this problem. Any idea? I would try a few things to narrow down the cause. Make sure you are running one and only dhcp server on your lan. Try by giving your computer a fixed lan address. Check the computer's log (/var/log/syslog) to see if there are any messages regarding network problems around the time you face them. Use ifconfig command to see if your interface is having any errors. Finally, if everything seems to work okay yet the problem still occurs, very often it is just defective cable. Try replacing it and see if that helps. -- Please reply to this list only. I read this list on its corresponding newsgroup on gmane.org. Replies sent to my email address are just filtered to a folder in my mailbox and get periodically deleted without ever having been read. -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/i02fv4$76b$1(a)dough.gmane.org |