Notes
Instead of making two rules if you want to mark a packet, connection or routing-mark and finish
mangle table processing on that event (in other words, mark and simultaneously accept the packet),
you may disable the set by default passthrough property of the marking rule.
Usually routing-mark is not used for P2P, since P2P traffic always is routed over a default getaway.
General Information
Description
The following section discusses some examples of using the mangle facility.
Peer-to-Peer Traffic Marking
To ensure the quality of service for network connection, interactive traffic types such as VoIP and
HTTP should be prioritized over non-interactive, such as peer-to-peer network traffic. RouterOS
QOS implementation uses mangle to mark different types of traffic first, and then place them into
queues with different limits.
The following example enforces the P2P traffic will get no more than 1Mbps of the total link
capacity when the link is heavily used by other traffic otherwice expanding to the full link capacity:
[admin@MikroTik] > /ip firewall mangle add chain=forward \
\... p2p=all-p2p action=mark-connection new-connection-mark=p2p_conn
[admin@MikroTik] > /ip firewall mangle add chain=forward \
\... connection-mark=p2p_conn action=mark-packet new-packet-mark=p2p
[admin@MikroTik] > /ip firewall mangle add chain=forward \
\... connection-mark=!p2p_conn action=mark-packet new-packet-mark=other
[admin@MikroTik] > /ip firewall mangle print
Flags: X - disabled, I - invalid, D - dynamic
0 chain=forward p2p=all-p2p action=mark-connection new-connection-mark=p2p_conn
1 chain=forward connection-mark=p2p_conn action=mark-packet new-packet-mark=p2p
2 chain=forward packet-mark=!p2p_conn action=mark-packet new-packet-mark=other
[admin@MikroTik] >
[admin@MikroTik] > /queue tree add parent=Public packet-mark=p2p limit-at=1000000 \
\... max-limit=100000000 priority=8
[admin@MikroTik] > /queue tree add parent=Local packet-mark=p2p limit-at=1000000 \
\... max-limit=100000000 priority=8
[admin@MikroTik] > /queue tree add parent=Public packet-mark=other limit-at=1000000 \
\... max-limit=100000000 priority=1
[admin@MikroTik] > /queue tree add parent=Local packet-mark=other limit-at=1000000 \
\... max-limit=100000000 priority=1
Mark by MAC address
To mark traffic from a known MAC address which goes to the router or through it, do the
following:
[admin@MikroTik] > / ip firewall mangle add chain=prerouting \
\... src-mac-address=00:01:29:60:36:E7 action=mark-connection
new-connection-mark=known_mac_conn
[admin@MikroTik] > / ip firewall mangle add chain=prerouting \
\... connection-mark=known_mac_conn action=mark-packet new-packet-mark=known_mac
Page 455 of 695
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