I am doing some work on a small fixed wireless network, and they have 2 
connections, neither of which are fiber. They are attempting to push 
most of the streaming traffic out one provider while allowing everything 
else to go through the other. I implemented routing marks based off of 
an example in the Mikrotik wiki in order to accomplish that, marking 
based on layer7 regex for example:

Code: Select all
/ip firewall mangle print
add action=mark-routing chain=prerouting comment=Facebook disabled=no \
     in-interface=ether2-switch2 layer7-protocol=facebook new-routing-mark=\
     to_WAN2 passthrough=no


I then have a route that matches the routing mark:

Code: Select all
/ip route
comment=WAN2 distance=1 gateway=xxx.xxx.xx.x \
     routing-mark=to_WAN2


After activating these rules, things starting matching the regex Layer 7 
rules fine, CPU load was stable, but I noticed that the traffic on WAN2 
(where most of the marked connections were going) was showing perfectly 
equal TX and RX traffic on the interface. This maxed out the upload on 
the connection and caused massive packet loss. Anyone have any idea why 
the traffic would have been looping like that?

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