You can monitor TX/RX rates on both ends of all links now. That is a
direct correlation to what the link is capable of. The only caveat is
that when an 802.11 radio is telling you "X", that the actual throughput
it's capable of is more like 55% of "X". I monitor all of these on all
of our links, and when a link goes down to 80% of "X" then I know I have
trouble in River City (or Black Rock if you prefer).
bp
On 10/30/2014 1:05 PM, Shayne Lebrun via Af wrote:
This. Say my AP can do ten megs/second of downlink to clients. My
throughput chart is flatlined at 6 mb/s.
Why? Is it because some of the clients are in lower modulations, and
using more timeslots to move a given amount of data than they should?
Is it that the radio is doing lots of retransmitting? If so, who?
*From:*Af [mailto:[email protected]] *On Behalf Of *Mike Hammett via Af
*Sent:* Thursday, October 30, 2014 3:40 PM
*To:* [email protected]
*Subject:* Re: [AFMUG] Feature Request of all radio manufacturers:
Radio utilization or duty cycle meters
You're missing the point.
I want to know what the air interface is doing. It may be completely
stopped up by retransmissions or bad clients, yet that isn't easily
seen by other means (CPU usage, IRQ usage, throughput, etc.).
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
<https://www.facebook.com/ICSIL><https://plus.google.com/+IntelligentComputingSolutionsDeKalb><https://www.linkedin.com/company/intelligent-computing-solutions><https://twitter.com/ICSIL>
------------------------------------------------------------------------
*From: *"Stefan Englhardt via Af" <[email protected] <mailto:[email protected]>>
*To: *[email protected] <mailto:[email protected]>
*Sent: *Thursday, October 30, 2014 2:33:51 PM
*Subject: *Re: [AFMUG] Feature Request of all radio manufacturers:
Radio utilization or duty cycle meters
.a has only 54Mbit/s Phy rate. RB800 is quite powerful.
With N/AC you see a lot more cpu work.
With TDMA protocol the cpu has to work in fixed cycles with low latency.
So if it is busy while it has to send the next map for the cpes at an
exact timing
the whole sector suffers.
So the cpu should stay at a low level to keep the protocol running.
*Von:*Af [mailto:[email protected]] *Im Auftrag von *Mike Hammett
via Af
*Gesendet:* Donnerstag, 30. Oktober 2014 20:22
*An:* [email protected] <mailto:[email protected]>
*Betreff:* Re: [AFMUG] Feature Request of all radio manufacturers:
Radio utilization or duty cycle meters
The CPU usage doesn't tell you RF congestion, retransmits, etc. It
just tells you how busy the CPU is. If you're running NV2 on an A card
in an RB800, your CPU is going to be low, but your radio is going to
be very busy and yet not including that information.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
<https://www.facebook.com/ICSIL><https://plus.google.com/+IntelligentComputingSolutionsDeKalb><https://www.linkedin.com/company/intelligent-computing-solutions><https://twitter.com/ICSIL>
------------------------------------------------------------------------
*From: *"Stefan Englhardt via Af" <[email protected] <mailto:[email protected]>>
*To: *[email protected] <mailto:[email protected]>
*Sent: *Thursday, October 30, 2014 2:19:30 PM
*Subject: *Re: [AFMUG] Feature Request of all radio manufacturers:
Radio utilization or duty cycle meters
This is not quite right. TDMA Protocols like NV2 and Airmax are CPU
limited.
----- GENIAS INTERNET -- www.genias.net <http://www.genias.net>------
Stefan Englhardt Email: [email protected] <mailto:[email protected]>
Dr. Gesslerstr. 20 D-93051 Regensburg
Tel: +49 941 942798-0 Fax: +49 941 942798-9
*Von:*Af [mailto:[email protected]] *Im Auftrag von *Mike Hammett
via Af
*Gesendet:* Donnerstag, 30. Oktober 2014 20:09
*An:* [email protected] <mailto:[email protected]>
*Betreff:* Re: [AFMUG] Feature Request of all radio manufacturers:
Radio utilization or duty cycle meters
CPU is largely unrelated to what the radio is doing.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
<https://www.facebook.com/ICSIL><https://plus.google.com/+IntelligentComputingSolutionsDeKalb><https://www.linkedin.com/company/intelligent-computing-solutions><https://twitter.com/ICSIL>
------------------------------------------------------------------------
*From: *"Bill Prince via Af" <[email protected] <mailto:[email protected]>>
*To: *[email protected] <mailto:[email protected]>
*Sent: *Thursday, October 30, 2014 2:05:45 PM
*Subject: *Re: [AFMUG] Feature Request of all radio manufacturers:
Radio utilization or duty cycle meters
You can get a CPU load metric from UBNT radios (example below).
bp
On 10/30/2014 11:22 AM, Mike Hammett via Af wrote:
I want to see utilization or duty cycle meters. Tell me how busy
the AP is so I know how much more can fit... and break down into
different categories why it's busy. TX, Rx, retransmit, overhead,
MCS 15, MCS 0, which stations are using what percent, etc.
I'd say that knowing how busy the radio is is more important than
knowing how many bits are flowing through it.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
<https://www.facebook.com/ICSIL><https://plus.google.com/+IntelligentComputingSolutionsDeKalb><https://www.linkedin.com/company/intelligent-computing-solutions><https://twitter.com/ICSIL>
