Manual:Fast Path

Applies to RouterOS: v6.0rc2 +

List of RouterBoards with FastPath support

RouterBoard	Interfaces
RB3xx series	ether1,2
RB6xx series	ether1,2
RB7xx series	all ethernets
RB8xx series	ether1,2
RB9xx series	all ethernets
RB1000	all ethernets
RB1100 series	ether1-10,13
RB2011 series	all ethernets and sfp
CCR series routers	all ethernets and sfps

FastPath Handlers

Currently RouterOS has three fast path handlers

• ipv4 fast path
• traffic generator
• mpls fast path
• bridge handler

Note: Packet will be forwarded in fast path only if source and destination interfaces support fast path. See the list of supported interfaces.

IPv4 handler

IPv4 fast path is automatically used if following conditions are met:

• firewal rules are not configured,
• queues are not configured
• source interface is not bridge or bonding slave
• destination interface have configured only-hw-queue,
• no vrrp, mesh, metarouter interface configuration,
• sniffer, torch or traffic generator is not running
• connection tracking is not active

/ip firewall connection tracking set enabled parameter has new auto value Which means that connection tracking is disabled by default until firewall rules are added.

Traffic Generator handler

Traffic Generator fast path is automatically used for interfaces that support this feature.

Bridge handler

Bridge fast path is automatically used if following conditions are met:

• ) bridge filter rules are not configured,
• ) /interface bridge settings use-ip-firwall=no,
• ) destination interface has configured only-hw-queue,
• no vrrp, mesh, metarouter interface configuration,
• sniffer, torch or traffic generator is not running

Bridge fast path is approximately twice as fast.

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