From these symptoms, my mental dowser is bending towards "fastpath problem."

You can turn fastpath off for the bridge in Bridge / Settings — try that and 
see whether the problem goes away.

> On Oct 8, 2015, at 6:32 PM, Justin Marshall <just...@pdmnet.net> wrote:
> 
> I also should add,
> 
> If I run a /tool torch on that bridge, it clears the issue up also (no lost 
> pings to any of the devices on that bridge)
> 
> Also forgot to mention that the RB2011 is running 6.30.2
> 
> -----Original Message-----
> From: mikrotik-boun...@mail.butchevans.com 
> [mailto:mikrotik-boun...@mail.butchevans.com] On Behalf Of Josh Luthman
> Sent: Thursday, October 08, 2015 9:08 PM
> To: Mikrotik discussions
> Subject: Re: [Mikrotik] Mikrotik Bridge Issue (pings dropping to Devices)
> 
> Mikrotik uses the MAC of the first interface added to it, I believe.  It 
> knows that MAC won't exist anywhere else.
> 
> 
> Josh Luthman
> Office: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
> 
> On Thu, Oct 8, 2015 at 9:04 PM, Justin Marshall <just...@pdmnet.net> wrote:
> 
>> Hi,
>> 
>> I have an RB2011 with a bridge.  Today everything on the bridge 
>> decided to randomly start losing pings.
>> 
>> Someone had suggested a while back on a similar issue, that copying a 
>> mac address from an Ethernet port on the bridge, and pasting it into 
>> the "Admin MAC Address" section of the bridge would sometimes fix the 
>> issue (forgot the explanation I was given, but it made sense at the 
>> time, something about the way Mikrotik chooses the MAC address and 
>> that it's better to sometimes make it 'static')
>> 
>> In this situation; If I copy/paste one of the mac addresses from an 
>> Ethernet port on the bridge into the "Admin MAC Address" section on 
>> the bridge, it fixes the issue for about 20 minutes, then it re-appears....
>> 
>> Does anyone have a suggestion for such an issue?
>> 
>> Thanks
>> Justin
>> just...@pdmnet.net<mailto:just...@pdmnet.net>
>> 
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