[Tfug] Slightly OT: Weird home networking issue

[Zack Breckenridge]

You mentioned DHCP "giving out" 169.x.y.z addresses, which to my knowledge
are so called "link local" addresses - usually indicative of the *absence*
of a DHCP server.

If you can connect a linux box, with a faster NIC than the router I think,
directly to the router, you may be able to test the link renegotiation
theory with:

# mii-tool -r eth0

Or "ethtool". See
http://kb.juniper.net/InfoCenter/index?page=content&id=KB11206&cat=NSMXPRESS&actp=LIST

Zack B.
On Feb 22, 2013 3:26 PM, "Christopher Robbins" <robbinsc at gmail.com> 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.
>
>
>
>> (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.  :-/
>
> 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
>
> --
> Christopher P Robbins
> P: 480.336.3043
> C: 928.257.6368
> Email: robbinsc at gmail.com
>
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