I think I know what is happening... I have had this problem with Ubiquiti
radios for a bit now. That looks like a flood of RX pause packets from flow
control. The MT will see the PPS but you will not find anything on torch
because it is at the switch layer.

If you have a smart switch there I would strongly recommend finding what
port it is originating from. I bet it is from a UBNT Radio. Then a simple
fix would be disable the flow control on that device.

On Wed, Aug 3, 2016 at 8:14 PM, James Wilson <[email protected]> wrote:

> Thanks Jesse!
>
> On Wed, Aug 3, 2016 at 10:13 PM, Jesse Dupont <
> [email protected]> wrote:
>
>> I'm guessing that if there have been no configuration changes recently,
>> you had nefarious traffic running across this link in the TX direction that
>> was a flood of small packets at a moderate bit rate. The bandwidth drop was
>> because of the 46K PPS, which a 2011 simply can't do. Scott is right,
>> Torching it will make it obvious.
>>
>> > On Aug 3, 2016, at 7:23 PM, James Wilson <[email protected]> wrote:
>> >
>> >   This is Port 3 on an RB2011UiAS at one of our relay sites.
>> Intermittently we are seeing a two minute drop in speed.
>> >
>> >   And the packets per second go up at the same time.
>> >
>> >   Port 3 is connected to an Ubiquiti AirFiber 5X at 1 Gbps.
>> >
>> >   Some of the other ports have Ubiquiti Rockets attached at 100 Mbps.
>> >
>> >   Any ideas?  Can I supply more information?
>> >
>> >
>> >
>> > <image.png>
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-- 
David Jones
NGL Connection
307-288-5491 ext 702
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