[lug] home network question

[John Hernandez]

Davide, this might have something to do with how the routers are
deployed.  How are they connected?

In this situation, I usually disable DHCP on the second device in the
chain and uplink it using a LAN port.  The WAN port goes unused (no
NAT/routing) on the downstream device. This avoids double NAT and
creates a single layer-2 domain across both devices.

On Fri, Dec 21, 2012 at 5:52 PM, Davide Del Vento
<davide.del.vento at gmail.com> wrote:
> Thanks to both!
>
> More data collected. The phone is Android 2.3.6
> A laptop cannot see the wireless network when the phone cannot, which
> I believe point strongly versus the problem.
>
> It did not look to have any grounding issue, in that connecting or
> disconnecting the desktop (grounded) did not change anything and the
> trick below (which did partially solve the problem) was performed on
> an ungrounded laptop, in the same grounding conditions in which it was
> failing.
>
> According to the router web interface the wireless was enabled. I
> played with many settings (including a few reboot of the box) without
> any success. The odd thing is that the web interface does not show the
> MAC address of the WLAN (let alone allowing me to change it). I then
> disabled (reboot) and reenabled (reboot) the WLAN et voila' -- it is
> now working. The odd thing still remains the same (can't see router
> MAC, I guess I can connect the laptop and find it), but the web
> interface does show the phone MAC address (?)
>
> I suspect the issue will reoccur, so if you have other ideas (even
> wild) please let me know.
>
> Happy Holidays,
> Davide
>
> On Tue, Dec 18, 2012 at 10:17 PM, F.L. Whiteley <techzone at greeleynet.com> wrote:
>> More data.
>>
>> I was troubleshooting an iPad wireless problem recently, perhaps if the
>> phone is iPhone it might apply also.  Apparently the iPads do not like
>> double-NAT WIFI connections, so setting up the router as an access point is
>> preferred.  Is that your setup?
>>
>> Slightly different, but also WIFI. I've done some local support on Skybeam
>> customers where they are on rural acreages with neighbors.  They call
>> Skybeam, no trouble found with their service or radios, but performance
>> remains terrible.  I show up, change the customer LAN addressing from the
>> default and it just flows.  Now, is it a WIFI radio/radio issue or slightly
>> upstream?  Some appear near enough, but others appear outside the range for
>> radio/radio trouble.  Though the former seems most likely, I have this
>> nagging feeling despite the MAC isolation that appears to be used on the
>> network.  I advised Skybeam support.  These customers typically buy only
>> from 2-3 brands of the popular WIFI routers from the big box stores, so the
>> default LAN addressing is common among 10-20 neighbors.  Plus they are
>> definitely sharing the same tower antenna.
>>
>> YMMV,
>>
>> Frank Whiteley
>>
>>
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: lug-bounces at lug.boulder.co.us [mailto:lug-bounces at lug.boulder.co.us]
>> On Behalf Of Davide Del Vento
>> Sent: Monday, December 17, 2012 8:06 AM
>> To: Boulder (Colorado) Linux Users Group -- General Mailing List
>> Subject: [lug] home network question
>>
>> Folks,
>> I have a TRENDnet TEW 432BRP with firmware v2.00.19 connected via ethernet
>> to another wireless+ethernet router. Then I have two PCs connected to the
>> TRENDnet via ethernet and my wife would like to use its wifi for her phone.
>>
>> The trouble is, if the PCs are off, the phone always says the wifi is out of
>> range, even when sitting in the same room where the router is.
>> When the PCs are on, it's 50-50 (sometimes the wifi is out of range,
>> sometimes is working). The PC always access the network fine.
>>
>> Do you have any idea of what's going on? I suspected something like power
>> save, but couldn't find anything. Neither did Google. Do I have a defective
>> unit, or is it anything else I could try? I'd be eager to try something
>> hacky, but e.g.
>> http://wiki.openwrt.org/toh/start#trendnet isn't supported.
>>
>> Even just suggestions about keywords to Google would be good.
>>
>> Thanks,
>> Davide
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