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Interfaces that support FastPath:
| RouterBoard | Interfaces |
|---|---|
| RB6xx series | ether1,2 |
| RB7xx series | all ports |
| RB800 | ether1,2 |
| RB9xx series | all ports |
| RB1000 | all ports |
| RB1100 series | ether1-11 |
| RB2011 series | all ports |
| RB3011 series | all ports |
| CRS series routers | all ports |
| CCR series routers | all ports |
| All devices | wireless interfaces |
| bridge interfaces | |
| VLAN, VRRP interfaces | |
| bonding interfaces (RX only) | |
| PPPoE, L2TP interfaces | |
| EoIP, GRE, IPIP interfaces. |
EoIP, Gre, IPIP, and L2TP interfaces have per-interface setting allow-fast-path. Allowing fast path on these interfaces has a side effect of bypassing firewall, connection tracking, simple queues, queue tree with parent=global, IP accounting, IPsec, hotspot universal client, vrf assignment for encapsulated packets that go trough fast path. Also, packet fragments cannot be received in FastPath.
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