Vyatta Network OS Documentation

Learn how to install, configure and operate the Vyatta NOS, which helps drive our virtual networking & 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