May 18, 2017
How to fix P2P matcher error in mangle rules
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You have upgraded to RouterOs 6.39.x and now your P2P mangle rules are no longer working. This issue is caused by MikroTik removing the P2P option/field from the mangle rules. There explanation is that this method of matching P2P traffic is obsolete. The image above shows what the error looks like. To fix this