[Tfug] Slightly OT: Weird home networking issue

[Eric Vorrie]

Good Lord folks, we know it's the router.  He's getting it replaced.  Let's
not put on our "M.I.T. Hats" and dissect this further....


On Fri, Feb 22, 2013 at 4:11 PM, Bexley Hall <bexley401 at yahoo.com> wrote:

> Hi Christopher,
>
>
> On 2/22/2013 3:26 PM, Christopher Robbins wrote:
>
>> On Fri, Feb 22, 2013 at 2:02 PM, Bexley Hall<bexley401 at yahoo.com>  wrote:
>>
>>  I'd had problems with the *wireless* functionality in a Centurylink
>>> (Qwest) "router".  It would crash the router after some period of
>>> operation (I believe a thermal issue taking down the power supply
>>> periodically).  Disabling the radio "fixed" the problem.
>>>
>>> Have you assigned static IP's?  I.e., are you sure the router
>>> hasn't reset itself and its idea of what *your* IP should be, etc.?
>>> (i.e., can you bring *another* host online after the crash and
>>> access the router?  Or, has it lost *all* wired connectivity?)
>>>
>>
>> It COMPLETELY falls apart.   DHCP gives out 169.x.y.z addresses, static
>> addresses quit responding, etc.
>>
>
> So, the reason the ping fails is not because the interface is
> "dead" (down) but, rather, has "moved" to a different IP (?).
>
> Sounds like the router has reset itself (can you watch the
> power LED -- or any other visible indicators -- to see if it "winks"
> at about the time it bites the shed?
>
> Do you have another similar/equivalent wall wart that you could
> power it with, temporarily (i.e., these are easy to swap out
> so relatively painless test to try).
>
> [And I'm sure you've already verified you have the most current
> firmware?]
>
>
>  (I've also seen some devices have problems re-autonegotiating
>>> link speeds -- esp Gb-to-Gb)
>>>
>>
>> Might be related - the ports on the router are 100 Mbps, and the switch is
>> supposed to autonegotiate.  What's weird is how long everything stays up -
>> I can see the switch establish the connection to the router, and the ping
>> works for a few minutes...I'm not sure what happens, but the whole thing
>> resets and the ping dies.  :-/
>>
>
> The operative word seems to be "resets".
>
> Turn off the wireless and repeat the test.  (i.e., disable the
> radio, don't just stop using it).
>
>
>  I dug up an Airport Express I had laying around, and using that to connect
>> the clients behind the switch works...Definitely something wrong with the
>> router.  Looks like this now -
>>
>> Modem/router - (wireless) ->  Airport Express - (wired) ->  Switch
>>
>
> So, the wired interface is not working even though the wireless is
> staying up?  Are you sure the wireless I/F isn't also "glitching"
> but possibly recovering (without you noticing it)?
>
>
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