Have you tried disabling Pause Frames on the Netonix switch? We've had an 
issues with Airfibers and that feature on a few sites.

From: ubnt_users-boun...@wispa.org [mailto:ubnt_users-boun...@wispa.org] On 
Behalf Of Steve Barnes
Sent: Monday, February 19, 2018 10:56 AM
To: Ubiquiti Users Group <ubnt_users@wispa.org>
Subject: Re: [Ubnt_users] MTU

Yeah everything is on AIRcontrol.  Just can figure it out.

At peak times I can run TCP Btest from PC through CPE to Router on Local tower2 
and get 45-50 Meg.  (10Mhz channel)

Btest from Router Tower2 to Router tower1 and get 200Meg.  (AF5x link 250M 
capacity Only 50-100M used).

Tower 1 Connected to GB fiber and can get 700Meg to Dist router at Core due to 
traffic.

But from PC through all to Dist router I can only get 8 Mbps at night.  During 
the morning when traffic is low I can get 45Mbps.  So has to be buffer, retry, 
MTU, cpu, etc. but I cant pin point it.  Ping times stay pretty stable. AMQ and 
AMC really good on this AP, 90%+.

Giving some serious thought to Preseem.

Steve Barnes
Wireless Operations Manager
New Lisbon Broadband
NLBC.COM
PCSWIN.COM
765-584-2288 ext:1101

From: ubnt_users-boun...@wispa.org<mailto:ubnt_users-boun...@wispa.org> 
[mailto:ubnt_users-boun...@wispa.org] On Behalf Of Chris J. Ruschmann
Sent: Monday, February 19, 2018 1:34 PM
To: Ubiquiti Users Group <ubnt_users@wispa.org<mailto:ubnt_users@wispa.org>>
Subject: Re: [Ubnt_users] MTU

Are you running air control or anything else that can aggregate the performance 
of your site in some nice easy to read graphs?

From: ubnt_users-boun...@wispa.org<mailto:ubnt_users-boun...@wispa.org> 
[mailto:ubnt_users-boun...@wispa.org] On Behalf Of Steve Barnes
Sent: Monday, February 19, 2018 7:38 AM
To: Ubiquiti Users Group <ubnt_users@wispa.org<mailto:ubnt_users@wispa.org>>
Subject: [Ubnt_users] MTU

I am trying to get every last drop out of our internet.  Most towers have a 
MikroTik Routing, Netonix doing POE and Switching, Fed by AF5x, and Rockets or 
Prism for AP's.  Sometimes seeing some slow downs I cant account for.  
Wondering if MTU or Flow control needs adjusted.

The MTU settings are as follows:
MikroTik MTU: 1500  L2 MTU: 1598         Flow Disabled
Netonix MTU: 1528                                       Both
AF5x Up to 9600 Auto                                  Flow Disabled
Rocket MTU: 1500                                         Flow Disabled
Prism MTU: 1500                                           Flow Disabled

In your experience should any of these be adjusted?

Steve Barnes
Wireless Operations Manager
New Lisbon Broadband
NLBC.COM
PCSWIN.COM
765-584-2288 ext:1101

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