<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Not sure whether this is a bug or an (undocumented) feature, but when /interface wireless scan 0 is running, the device returns bogus values for some OIDs and completely omits other OIDs.<div class=""><br class=""></div><div class="">The solution: Do NOT run /interface wireless scan 0 if you intend to query the device using SNMP.</div><div class=""><br class=""></div><div class="">Herb<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Feb 23, 2020, at 3:46 PM, Herb Weiner <<a href="mailto:herbw@wiskit.com" class="">herbw@wiskit.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Thanks, Bart.<br class=""><br class="">I had already reviewed that document (last updated "201912100000Z"), and it unfortunately was not very helpful. I had also already used snmpwalk to explore all of the available OIDs in the Mikrotik MIB. That also wasn't very helpful. Note that I am using the most recent firmware, version 6.46.3. For example:<br class=""><br class=""><ul class=""><li class="">strength (.1.3.6.1.4.1.14988.1.1.1.1.1.4.1), the value that I am most interested in, is documented in the Mikrotik MIB (MIKROTIK-MIB::mtxrWlStatStrength.1) as a 32 bit integer. The only description provided is "dBm". Based upon the OID name and the description, the best assumption I could make was that this would be the received signal strength on the wireless interface. But this variable always returns the value 1, whether or not the wireless interface is receiving a signal at all.</li><li class="">The Mikrotik MIB documents an OID MIKROTIK-MIB::mtxrWlRtabRadioName, a Display String concisely described as "". (That's right. You have to guess what it is.) I was hoping that this would correspond to the RADIO-NAME shown by the /interface wireless scan 0 command. But neither snmpget nor snmpwalk can even find this OID. Although it is documented, it apparently does not exist on my LHG XL HP5.</li><li class="">Some of the information that I'm looking for may actually be available, but because the Mikrotik MIB is so poorly documented, I may not realize that any given OID may be exactly what I'm looking for.</li></ul><br class="">Since I have already spent many hours investigating this, I was hoping that someone with some practical experience could provide some suggestions.<br class=""><br class="">Herb<br class=""><div class=""><br class=""><blockquote type="cite" class=""><div class="">On Feb 22, 2020, at 9:44 PM, Bart Kus <<a href="mailto:me@bartk.us" class="">me@bartk.us</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252" class="">
<div class="">
RouterOS supports the following MIBs:<br class="">
<br class="">
<a href="https://wiki.mikrotik.com/wiki/Manual:SNMP#Management_information_base_.28MIB.29" class="">https://wiki.mikrotik.com/wiki/Manual:SNMP#Management_information_base_.28MIB.29</a><br class="">
<br class="">
--Bart<br class="">
<br class="">
<br class="">
<div class="moz-cite-prefix">On 2/22/2020 4:59 PM, Herb Weiner
wrote:<br class="">
</div>
<blockquote type="cite" cite="mid:D965E3C4-31C7-4BD7-A8A1-F16E48A73E1C@wiskit.com" class="">
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charset=windows-1252" class="">
<div class="">I would like to use SNMP to facilitate aiming a
Node. In order to work on this project, I have setup a Node (LHG
XL HP5) and Sector (5SHPn) for testing purposes.</div>
<div class=""><br class="">
</div>
<div class="">The following shows the status of my Node:</div>
<div class=""><br class="">
</div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">[herbw@AA7HW-01] >
/snmp print </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> enabled: yes</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> contact:
#HamWAN-Support on <a href="http://irc.freenode.org/" class="" moz-do-not-send="true">irc.freenode.org</a></span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> location:
45.489139,-122.631972</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> engine-id: </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> trap-target: </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> trap-community:
hamwan</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> trap-version: 1</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> trap-generators:
temp-exception</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">[herbw@AA7HW-01] >
/interface wireless print oid</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> 0
tx-rate=.1.3.6.1.4.1.14988.1.1.1.1.1.2.1 </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">
rx-rate=.1.3.6.1.4.1.14988.1.1.1.1.1.3.1 </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">
strength=.1.3.6.1.4.1.14988.1.1.1.1.1.4.1 </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">
ssid=.1.3.6.1.4.1.14988.1.1.1.1.1.5.1 </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">
bssid=.1.3.6.1.4.1.14988.1.1.1.1.1.6.1 </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">
frequency=.1.3.6.1.4.1.14988.1.1.1.1.1.7.1 </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">
band=.1.3.6.1.4.1.14988.1.1.1.1.1.8.1 </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">
auth-client-count=.1.3.6.1.4.1.14988.1.1.1.3.1.11.1 </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> [herbw@AA7HW-01] >
/interface wireless scan 0</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">Flags: A - active, P -
privacy, R - routeros-network, N - nstreme, T - tdma, W -
wds, B - bridge </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class=""> ADDRESS
SSID CHANNEL SIG NF SNR RADIO-NAME
ROUTEROS-VERSION </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">A RT B
4C:5E:0C:89:3F:57 HamWAN 5880/5/an -28 -124 96
K7ICY-Tolliver </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">-- [Q quit|D dump|C-z
pause]</span></font></div>
<div class=""><br class="">
</div>
<div class="">Based upon the above, I would assume that if I query
the signal strength (.1.3.6.1.4.1.14988.1.1.1.1.1.4.1) using
snmpget, I would obtain a value of approximately -28 (the signal
strength varies a bit from the instantaneous value of -28
reported above). However, although I am able to obtain the SSID
using snmpget, I am unable to obtain the signal strength,
frequency or band:</div>
<div class=""><br class="">
</div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">$ snmpget -c hamwan
192.168.88.1 .1.3.6.1.4.1.14988.1.1.1.1.1.4.1</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">SNMPv2-SMI::enterprises.14988.1.1.1.1.1.4.1
= INTEGER: 1</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">$ $ snmpget -c hamwan
192.168.88.1 .1.3.6.1.4.1.14988.1.1.1.1.1.5.1</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">SNMPv2-SMI::enterprises.14988.1.1.1.1.1.5.1
= STRING: "HamWAN"</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">$ snmpget -c hamwan
192.168.88.1 .1.3.6.1.4.1.14988.1.1.1.1.1.7.1</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">SNMPv2-SMI::enterprises.14988.1.1.1.1.1.7.1
= INTEGER: 0</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">$ snmpget -c hamwan
192.168.88.1 .1.3.6.1.4.1.14988.1.1.1.1.1.8.1 </span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">SNMPv2-SMI::enterprises.14988.1.1.1.1.1.8.1
= ""</span></font></div>
<div class=""><font class="" face="Courier"><span style="font-style: normal;" class="">$ </span></font></div>
<div class=""><br class="">
</div>
<div class="">Also, is it possible to obtain the Noise Floor (NF),
Signal to Noise Ratio (SNR), or Radio Name from my Node using
SNMP? These are all reported by the /interface wireless scan 0.</div>
<div class=""><br class="">
</div>
<div class="">Thanks for any assistance you can provide.</div>
<div class=""><br class="">
</div>
<div class="">Herb, AA7HW</div>
<div class=""><br class="">
</div>
<br class="">
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
PSDR mailing list
<a class="moz-txt-link-abbreviated" href="mailto:PSDR@hamwan.org">PSDR@hamwan.org</a>
<a class="moz-txt-link-freetext" href="http://mail.hamwan.net/mailman/listinfo/psdr">http://mail.hamwan.net/mailman/listinfo/psdr</a>
</pre>
</blockquote>
<br class="">
</div>
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