[115363] in North American Network Operators' Group
RE: Wireless bridge
daemon@ATHENA.MIT.EDU (Jason Gurtz)
Thu Jun 18 11:29:08 2009
Date: Thu, 18 Jun 2009 11:25:24 -0400
In-Reply-To: <005c01c9f015$852ae490$8f80adb0$@com>
From: "Jason Gurtz" <jasongurtz@npumail.com>
To: <nanog@nanog.org>
Reply-To: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
This is a multi-part message in MIME format.
------=_NextPart_000_009E_01C9F007.79403C60
Content-Type: text/plain;
charset="us-ascii"
Content-Transfer-Encoding: 7bit
> (for example, after a good thunderstorm, the wireless link will be down
> for at least 12 hours, but will fix itself eventually.
Are you sure there's not a moisture problem in the antennae cabling? Get
an SWR meter that can handle the 2.4 GHz range and make sure that SWR is
very low (approaching 1:1 but certainly less than 2:1). Hook up the meter
in-line at the AP. Test this after everything is wet and again when
there's been a dry spell. Minimize the number of exposed connections and
use dielectric grease. Any exposed connections should be well wrapped
with that rubberized electricians tape first, then with regular.
> Resetting either access point will keep the link down for at least 30
> minutes.
This seems to point to signal quality issues. This could be interference
as others have suggested. Few things to try (in order of less work, less
$$$):
1.) Try different 802.11 channels. Pick one of 1, 6, or 12 as they are
the only non-overlapping spectrum. Set this manually on both ends
2.) if yaggi type antennas, try changing the polarity. If it's vertical
now, try horizontal or vice versa (both ends should be the same for
maximum gain!)
3.) Try even higher gain "dish" style antennas (these have circular
polarity)
4.) Use APs that do 802.11a or n. These are much less susceptible to
interference. This probably also means changing/adding antennas.
*.) Bonus idea: Google roll your own dsl (assuming both locations have
the same CO). Basically: get a dry pair (no dialtone) from the telco
going from location A to Location B; buy two sdsl modems and install at
each end; hopefully enjoy a few-several Mb connection!
~JasonG
------=_NextPart_000_009E_01C9F007.79403C60
Content-Type: application/x-pkcs7-signature;
name="smime.p7s"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename="smime.p7s"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------=_NextPart_000_009E_01C9F007.79403C60--
