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Well, now that the radio is inoperative, I can't look at the
/interface wireless monitor output, but the graph comes from "The
Dude". You're probably correct in implying that the graph shows
effective speed.<br>
<br>
I'm trying "NetInstall", with no luck so far.<br>
<br>
<div class="moz-cite-prefix">On 2014-07-21 13:14, Bart Kus wrote:<br>
</div>
<blockquote cite="mid:53CD749C.9000308@bartk.us" type="cite">
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<div class="moz-cite-prefix">Are you sure that's graphing link
speed? How did it dip below 6Mbit? (MHz y-axis label?) The
modems cannot operate slower than that in only-n mode.<br>
<br>
--Bart<br>
<br>
<br>
On 07/21/2014 01:08 PM, Dean Gibson AE7Q wrote:<br>
</div>
<blockquote cite="mid:53CD7359.6090201@ae7q.com" type="cite">
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The displayed link speed was also dropping. See <a
moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.ae7q.com/misc/media/5.9GHz/2014-07-xx_Data.png">http://www.ae7q.com/misc/media/5.9GHz/2014-07-xx_Data.png</a><br>
<br>
<div class="moz-cite-prefix">On 2014-07-21 11:24, Bart Kus
wrote:<br>
</div>
<blockquote cite="mid:53CD5ACD.7030403@bartk.us" type="cite">
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<div class="moz-cite-prefix">Have you looked at the
possibility that your modem is negotiating a higher link
speed over time and that's the cause for the gradual signal
level loss? When you reboot these things and they aren't
pressed to move data, they opt for the slowest (and highest
power) modulation. As data comes in for them to move, if
they build up queues, they try higher order modulations,
which make use of amplitude modulation, and reduce the
average power level.<br>
<br>
It is possible to instruct the modem to only support a
subset of speeds. For example, the slowest speed only
(6Mbit):<br>
<br>
[eo@AE7SJ/Monroe-Paine] /interface wireless> set 0
supported-rates-a/g=<br>
12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps 6Mbps 9Mbps<br>
<br>
I don't think upgrading or downgrading firmware has anything
to do with RSSI readings as they're read directly from the
Atheros chip and not computed in firmware.<br>
<br>
The real test of the health of your connection would be if
it consistently supports the same ballpark speed range
(bits/sec actually moved) or if it is indeed dropping due to
this 8dB RSSI delta you're seeing. If the modem finds
itself having too many communication errors because it chose
a modulation that is too fast, it'll lower its negotiated
speed.<br>
<br>
--Bart<br>
<br>
<br>
On 7/21/2014 10:28 AM, Dean Gibson AE7Q wrote:<br>
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<blockquote cite="mid:53CD4DAF.6090309@ae7q.com" type="cite">
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OK, over the last three weeks both the TX and RX signal
levels have dropped 8dB; see:<br>
<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.ae7q.com/misc/media/5.9GHz/2014-07-xx_RX.png">http://www.ae7q.com/misc/media/5.9GHz/2014-07-xx_RX.png</a><br>
<br>
While this could be due to vegetation, the drop (somewhat
gradual this time) looks suspiciously like the previous two
drops of 8dB (see prior messages below). On Friday I
noticed that MicroTik had a new firmware release, v6.17, and
I upgraded to that. That fixed an NTP bug introduced in
v6.14 but made no difference in dBm levels, so Sunday
evening I downgraded to v6.13. That downgrade/reboot was
successful, but also made no difference. So, I did a second
reboot in preparation for upgrading back to v6.17 (using the
same scenario as below).<br>
<br>
This time, however, "presto!" (the results below) does not
quite apply. The 5SHPn shows a power-on LED, and when
connected to a switch, shows an electrical network LED.
However, <b>the 5SHPn is inaccessible via Ethernet</b>
(using Winbox to access via both by last IP address, and by
MAC address). PINGs fail; there is no corresponding entry
in the ARP table. I can hold in the reset button while
power-cycling the 5SHPn, and I get the flashing power LED
indicating a "reset configuration" is happening, but to no
avail: Winbox is unable to connect to the 5SHPn.<br>
<br>
<b>This is the third time I've had this 8dB drop</b>, and
the second time I've had to go to the roof to reset the
radio. So, I've removed the antenna from the roof. So,
unless someone has a bright idea, the 5SHPn and the 31dBi
dish antenna are available for $120 total. I'd like to sell
them as a unit, because I've got a really nice (but easily
removable) taped seal of the antenna/radio connection. If
you can't get the radio to work, you're only out $20.<br>
<br>
-- Dean<br>
425-338-4276 (home)<br>
425-359-4276 (cell)<br>
<br>
<div class="moz-cite-prefix">On 2014-06-13 18:29, Dean
Gibson AE7Q wrote:<br>
</div>
<blockquote cite="mid:539BA563.7040304@ae7q.com" type="cite">
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Going back to v6.13 didn't improve anything, but it did
seem to get rid of the occasional variations in voltage
(from 13.5v down to 12.8v) that SNMP was reporting to "The
Dude" software. So, after letting v6.13 run for couple
hours with no improvement, I reinstalled v6.15.<br>
<br>
Presto! Instant dBm improvement back to my normally
observed values. Here are links to SNMP graphs of the
drop @9:30am, and the rise at 17:48pm. Of course, you can
also see this in Nigel's Cacti reporting, albeit with less
horizontal (time) resolution.<br>
<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.ae7q.com/misc/media/5.9GHz/2014-06-13_0940.png">http://www.ae7q.com/misc/media/5.9GHz/2014-06-13_0940.png</a><br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.ae7q.com/misc/media/5.9GHz/2014-06-13_1740.png">http://www.ae7q.com/misc/media/5.9GHz/2014-06-13_1740.png</a><br>
<br>
Note that the reported sudden dBm "rise" to -60dBm (the
upper limit I've imposed to keep the graph scale
reasonable) on two occasions in the second graph, is when
I upgraded and then reconfigured the radio (from a
cut-&-paste script), and should be ignored.<br>
<br>
Note that a very similar scenario occurred several months
ago, when I upgraded from v6.10 to v6.12.<br>
<br>
Of course, today is Friday the 13th. Maybe Jason is
responsible.<br>
<br>
-- Dean<br>
<br>
<div class="moz-cite-prefix">On 2014-06-13 12:28, Dean
Gibson AE7Q wrote:<br>
</div>
<blockquote cite="mid:539B50D4.8030005@ae7q.com"
type="cite">
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<br>
<div class="moz-cite-prefix">On 2014-06-13 12:13, Cory
(NQ1E) wrote:<br>
</div>
<blockquote
cite="mid:CAGOhXwKUqn-hJ3BbybzLj4_cmaNiXkX7Co0sn_v5xf+HF5K42g@mail.gmail.com"
type="cite">
<div class="gmail_extra">Did it rain on those trees
you're pointing at around then? :)<br>
<br>
<div class="gmail_quote">On Fri, Jun 13, 2014 at
12:12 PM, Dean Gibson AE7Q <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:hamwan@ae7q.com" target="_blank">hamwan@ae7q.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0
0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">This morning (well after
the update to v6.15 last night) just after
9:30am, I saw a 8dB drop in both TX and RX
signal levels, which persist at this time. I
did a "reset configuration", which did not solve
the problem.<br>
<br>
Did anyone do a change at Paine sector 2 around
9:30am?<br>
</blockquote>
</div>
</div>
</blockquote>
<br>
It's been raining gently all morning. Last night it
rained a bit harder, and I saw no significant or unusual
variation. I'm going back to v6.13 to see if that
changes anything.<br>
<br>
The drop was very sudden. I have that antenna
connection very well sealed, I thought, and the Ethernet
cable runs uphill to get into the eaves. I did a
cursory visual check of that this morning.<br>
</blockquote>
<br>
</blockquote>
<br>
<div class="moz-cite-prefix">On 2014-05-04 13:00, Dean
Gibson AE7Q wrote:<br>
</div>
<blockquote cite="mid:53669C43.3060100@ae7q.com" type="cite">
<div dir="ltr">
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">OK,
everything is back working, and I have my dBm back!!<br>
<br>
Not a comedy of errors, but two factors intertwined to
create this problem:<br>
<br>
<ol>
<li>Since configuring the radio after a
configuration reset requires the use of WinBox
(until you get IP addresses set up), I moved the
network connection from the radio to its normal
router on the DMZ, and connected it to a router on
my LAN via an extension Ethernet cable and a
"dual-RJ-45-jack adapter". The port light on the
router associated with the radio connection was
off. This morning when I went to disconnect the
cables, I saw the port light on the router flash
momentarily. Junked the dual-RJ-45 adapter and
used another one (I had previously tried a
different cable), and I had WinBox access to the
radio! Everything worked except for the LEDs ...<br>
</li>
<li><b>After much more screwing around</b>, I found
out that for version 6.12,<b> the LEDs are not
configured by default</b> !!! Remember, I had
done a "reset-configuration" ...<br>
</li>
</ol>
<p><br>
So, for others that update to v6.12, here are the
relevant lines in the setup:<br>
</p>
<p><b><font color="#3333ff"><tt>/system leds add
type=interface-status interface=ether1-local
leds=user-led</tt><tt><br>
</tt><tt>/system leds add
type=wireless-signal-strength
interface=wlan1-gateway
leds=led1,led2,led3,led4,led5</tt></font></b><br>
</p>
</div>
</div>
<div class="gmail_extra">Now that I know I can configure
the LEDs with other options, I'll try some.<br>
<br>
I have no clue as to why my dBm dropped, and why I now
have my prior values back ...<br>
<br>
-- Dean<br>
<div class="gmail_quote"><br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
<div class="HOEnZb">
<div class="h5"> -----Original Message-----<br>
From: PSDR [mailto:<a moz-do-not-send="true"
href="mailto:psdr-bounces@hamwan.org">psdr-bounces@hamwan.org</a>]
On Behalf Of Dean Gibson AE7Q<br>
Sent: Sunday, May 4, 2014 1:44 AM<br>
To: Puget Sound Data Ring<br>
Subject: Re: [HamWAN PSDR] Metal 5SHPn firmware
6.12 is current (addendum)<br>
<br>
Well, this did not end well. ... I decided to
reset the configuration (using the command line)
... it appears to have "bricked" the radio.<br>
<br>
It draws about 160ma (about the value from a
week ago, when I first measured it). There is
no light on the side of the unit, and the
Ethernet port is dead.<br>
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