I've checked the light levels, auto negotiation is off, and I've also
enabled flow control - all with no change in the behavior.

On Thu, Aug 26, 2021 at 2:32 PM TJ Trout <[email protected]> wrote:

> turn auto neg off, try flow control on and off. Check your light levels on
> all 4 sfp's and make sure they are within spec, if not clean the fibers or
> add an attenuator(s)
>
> On Thu, Aug 26, 2021 at 12:20 PM Josh Baird <[email protected]> wrote:
>
>> FWIW - we have a WTM4200 with a CCR2004 on one end and don't have that
>> issue.
>>
>> On Thu, Aug 26, 2021 at 3:13 PM Joe Novak <[email protected]> wrote:
>>
>>> Test with anything other than a CCR2004. I'd be willing to bet on it
>>> being the problem.
>>>
>>> On Thu, Aug 26, 2021 at 2:05 PM Jason McKemie <
>>> [email protected]> wrote:
>>>
>>>> Are you familiar with the Aviat radios?  I cannot seem to find anywhere
>>>> to set flow control on the ethernet interfaces.
>>>>
>>>> On Thu, Aug 26, 2021 at 1:25 PM Colin Stanners <[email protected]>
>>>> wrote:
>>>>
>>>>> Have you tried Flow Control off/on, on both devices, at one end's
>>>>> Ethernet link? What model of MT router?
>>>>>
>>>>> On Thu, Aug 26, 2021, 1:20 PM Jason McKemie <
>>>>> [email protected]> wrote:
>>>>>
>>>>>> I'm having an issue where about 3-8% of packets going through a
>>>>>> WTM4200 link are seeing a 1-10ms spike in latency.  Aviat support is not
>>>>>> being particularly helpful, they just say they're seeing CRC errors at
>>>>>> one end and to replace the SFPs and cabling to see if that helps.  These
>>>>>> have a fiber connection and are powered through the DC port.  The radios 
>>>>>> /
>>>>>> SFPs / fiber at both ends are new.  I've already replaced the SFPs on the
>>>>>> attached Mikrotik routers with Aviat SFPs with no change in the issue.
>>>>>> Incidentally, I'm seeing the issue when I ping from the Mikrotik routers 
>>>>>> to
>>>>>> their respectively attached WTM - so the issue is both ends and not a
>>>>>> single one.  Has anyone seen anything like this?
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