Eric Shubert wrote:
> Trent Shipley wrote:
>> Benjamin Francom wrote:
>>> On Tue, Dec 22, 2009 at 7:18 PM, Mark Phillips
>>> <mark@phillipsmarketing.biz> 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 <tshipley@deru.com> 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.
>>>>>
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>>> 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
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>> 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.
> 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.
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