After migration from RB750G v6.27 to CRS-125 v6.32.3 there was starting annoying log messages from OpenVPN server if any client is connected.
Frequency of this messages is diferent, sometime 1-2 per day, sometime 15 per minute. This message is going to memory, remote syslog and console too.
Especially when working through ssh is very annoying.
The message on console and remote syslog:
[code]jul/14/2016 09:23:25 ovpn,debug,error,,,,,,,,,l2tp,info,,debug,,,critical,,,,,,,,,,,,,warning duplicate packet, dropping[/code]
The same message in memory:
[code]09:23:25 ovpn,debug,error,10820,11808,33692,32664,25472,30620,32480,33688,l2tp,info,33692,debug,79,65535,critical,10176,47396,25488,29944,30696,26392,11808,30084,30080,30620,37808,30620,warning duplicate packet, dropping[/code]
Regarding "wide topics" of message, it looks like bug in OpenVPN implementation in RouterOS (and is not possible to workaround it by "!$topic").
Upgrade to 6.32.4 and 6.34.6 does not helped.
In original OpenVPN is possibility to mute it by "--mute-replay-warnings" option, but here is unfortunately not.