Trent Shipley wrote: > Eric Shubert wrote: >> Trent Shipley wrote: >>> Benjamin Francom wrote: >>>> On Tue, Dec 22, 2009 at 7:18 PM, Mark Phillips >>>> wrote: >>>>> Trent, >>>>> >>>>> I ran into a similar problem today - my network slowed waaaaaaaaaaaaaay down >>>>> on me. All I used was ping to methodically to check all the connections and >>>>> found that a switch was reseting itself and dropping packets. Basically, I >>>>> turn everything off, reset all the routers, cable modems, etc, and then turn >>>>> on one piece of equipment at a time and ping to the main router to see if I >>>>> can connect and if there is any packet loss. You can find a out a lot of >>>>> information by being methodical and knowing your network topology. >>>>> >>>>> Good Luck! >>>>> >>>>> Mark >>>>> >>>>> On Tue, Dec 22, 2009 at 5:52 PM, Trent Shipley wrote: >>>>>> Somewhere my connection to the Internet is borken. Load times take >>>>>> forever. It doesn't seem to effect the wireless client routers, but I >>>>>> have had trouble on both the wired machines under Ubuntu 9.10 and >>>>>> Windows Vista. Sometimes the Linux machine effectively looses >>>>>> connectivity with the Internet. It comes back if I log out of my X >>>>>> session and log back in ... most of the time. I have a firewall router, >>>>>> but effectively no household LAN since I've been too lazy to really >>>>>> figure out how to configure the Ubuntu desktop machine as a primary >>>>>> domain controller, then adjust it's firewall to suit. >>>>>> >>>>>> >>>>>> I'd like an idiot friendly tool to help track this problem down, >>>>>> preferably on the Linux machine which seems to experience the problem >>>>>> most consistently. >>>>>> >>>>>> Baring a GUI tool friendly to mortal users, I am not above using the >>>>>> @#$% command line and a text editor. >>>>>> >>>>>> >>>>>> I am not too network savvy. I have to look up the layers of the OSI >>>>>> stack every time. What is a reasonable diagnostic or fault tree for >>>>>> approaching my symptoms. >>>>>> >>>>>> It is also worth noting that this problem seems to date back to >>>>>> precisely when I upgraded from Ubuntu 9.04 to 9.10. >>>>>> >>>>>> --------------------------------------------------- >>>>>> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us >>>>>> To subscribe, unsubscribe, or to change your mail settings: >>>>>> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss >>>>> --------------------------------------------------- >>>>> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us >>>>> To subscribe, unsubscribe, or to change your mail settings: >>>>> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss >>>>> >>>> Unplug all devices for at least one min. Start with modem and work >>>> your way up to the PC >>>> The Vista and Ubuntu machines are separate machines, not a single dual >>>> boot, right? >>>> >>>> tracert=windows >>>> traceroute=linux >>>> --------------------------------------------------- >>>> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us >>>> To subscribe, unsubscribe, or to change your mail settings: >>>> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss >>> I have "rebuilt" the network a couple of times from the modem up. My >>> suspicion is focused on the Ubuntu desktop because of the coincidence >>> that the problem started with a major upgrade. >>> >>> Yes. We have the following on the network ... not all at the same time. >>> * Qwest modem, outside the firewall. >>> * Netgear wired/802.11g wireless router. No evident problems with >>> wireless connections. >>> * Ubuntu 9.10 on Dell hardware. Wired connection. (Main suspect) >>> Thinking about putting in a new Ethernet card since I have it "in stock" >>> anyway and it's doing me no good in the box. >>> * Apple notebook. Wired connection. >>> ** Windows Vista. Have seen some symptoms. >>> ** OS X. mild symptoms. >>> * Apple notebook. Wireless. No known symptoms. >>> * Apple iMac. Wireless No known symptoms. >>> * (Occasional) HP netbook running Ubuntu 9.10 netbook remix. Wireless. >>> No known symptoms. >> That's helpful. >> >> I really doubt the upgrade was a cause of any kind, given that your >> Apple notebook (other wired) connection also experiences problems. >> >> Have you tried alternate wired ports on the Netgear router? Sometimes a >> single port/plug can be defective. The whole wired side of the router >> might be failing as well. > > I have tried swapping wires and ports. It doesn't seem to help. > >> Do you have a switch you can put in place of the wireless router to see >> if the problem persists? > > I don't have a spare switch. Of course switches aren't too expensive. > I just don't have much use for it outside of testing unless I change my > network architecture to something like, > * Router > ** Wired switch > *** wired computers. I don't think that'll buy you anything, especially if the wired part of your router is hosed. I would try something more like this: * DSL modem ** Wired switch *** wired computers *** wireless router FWIW, this isn't really the best from a security standpoint, but I don't think it's any less secure than what you have now. >> Does your DSL modem do dhcp/nat? (most do these days) >> > > The DSL modem definitely does dhcp. I do not know if NAT is being done > by the modem or the router. Probably both. That's not necessarily a problem. You don't want both the DSL modem and the router providing dhcp on the same subnet though. -- -Eric 'shubes' --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss