Vyatta NOS documentation

Learn how to install, configure, and operate Vyatta Network Operating System (Vyatta NOS), which helps to drive our virtual networking and physical platforms portfolio.

Packet forwarding path

When enabled, PBR processes incoming packets after packet validation and firewall action. Packets received by the data plane ingress interfaces for transmission to the egress interface follow the forwarding path listed below. PBR operates on the VRF of the interface that the policy is applied to.

  1. Packet validation and reassembly
  2. Firewall
  3. DNAT
  4. PBR classification, route table ID determination
  5. SNAT
  6. Firewall
  7. QoS
  8. Transmit out of an egress interface