Not saying its a bad model to QOS at the edges but if your using cambium
take advantage of the
built in qos features also there is a capacity planner tool located on
cambium site for helping
get your frame utilization under control
A few things I am doing is tayloring the burst a lot on smaller to med
packages and touching it on the larger one.
So far it has gave a little breathing room for subs to recover faster.
On 11/6/2015 3:20 PM, Eric Muehleisen wrote:
Your suggestion is interesting. Currently, all SM's are left at
default (wide open). We rate-limit at the core with our BRAS. I didn't
consider this being a limiting factor during times of contention.
On Fri, Nov 6, 2015 at 3:00 PM, Adam Moffett <dmmoff...@gmail.com> wrote:
Or....reduce the sustained data rate configured on the low modulation
subscribers.
I believe the Canopy scheduler distributes capacity proportional to the
configured sustained rate when there's contention. So if you configure the
weaker connection for less speed, he should be allocated less air time.
Sorry for so many separate posts.
On 11/6/2015 2:30 PM, Forrest Christian (List Account) wrote:
Ripping and replacing a FSK with a 450 is generally not going to go well
unless you are absolutely certain your customers are going to modulate at
the highest rate.
A better scenario if you can manage it is to hang the 450 alongside the FSK
and then only move the heavy customers with strong signals.
On Nov 6, 2015 12:21 PM, "Eric Muehleisen" <ericm...@gmail.com> wrote:
Tyson,
1. We are using Cambium stock 65* dualslant antennas.
2. Mix of routers. We have a BYOR (bring your own router) policy.
3. All AP's are sync'd with either CMM4 or CTM2.
Adam,
We will certainly focus more attention on those SM's that have poor
modulation. It wouldn't surprise me if the most active SM's are the
ones stuck at 1x or 2x.
George,
We have not considered downgrading. Our entire network has been
upgraded to 13.4. That over 500 SM's at this point. I'm a little
nervous about downgrading.
The reality here is that upgrading a FSK sector to 450 gets us only a
little over double the capacity. FSK aggregates around 13mb/s and
around 27mb/s aggregate for the 450. This is quite disappointing. It
appears that we must now be very selective over what SM's can
register. A nearly impossible task in our situation. Use caution if
you plan on ripping and replacing your old FSK. You will not yield the
kind of throughput you'd expect.
On Fri, Nov 6, 2015 at 12:28 PM, Tyson Burris @ Internet
Communications Inc <t...@franklinisp.net> wrote:
Eric,
Thanks for bringing this up. We recently started deploying about 30 450
AP's. Our testing in the field and with customers is producing the same
EXACT problem you just reported.
More importantly, we see this problem on AP's with low SM's to high SM
ranges (5-45). Same firmware.
Let's compare some notes:
1. What antennas are you using?
2. What routers / OS are you using?
3. What sync source are you using?
We see high frame uses even on the AP's with low SM's and great
modulation rates.
I can understand if a large number of SM's have low modulation it will
eat up frames, but the outcome is the same on low and high SM counts.
Tyson Burris, President
Internet Communications Inc.
739 Commerce Dr.
Franklin, IN 46131
317-738-0320 Daytime #
317-412-1540 Cell/Direct #
Online: www.surfici.net
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-----Original Message-----
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Eric Muehleisen
Sent: Friday, November 6, 2015 12:51 PM
To: af@afmug.com
Subject: [AFMUG] 450 frame utilization and performance issues
We have a few 450 AP's with 30-40 subscribers and have been getting
several slow speed complaints lately. I just chaulked it up to issues with
the SM since the AP rarely got over 20mb/s downlink. We upgraded to 13.4
recently so we could watch our frame utilization. We started graphing it
over night and as you can see, we are hitting 100% for sustained periods of
time. During that time the AP is only doing approx. 23mb/s. This particular
AP has 34 registered SM and the majority show 6x and 4x with 4 or 5 SM's at
2x and 1x. The performance is a major disappointment. Anyone else have
similar experiences?
AP configuration: 20mhz channels, 2.5ms frame, 10 miles, 75% downlink,
3 contention slots.
Attached is a screenshot of the utilization and sector throughput
calculator from the Capacity Planner R13.
--
