Tag :: CBF

Class Based Forwarding (CBF) is a means for steering IP traffic into specific tunnels based on either the ingress DSCP values or based on “classes”, which are derived from fields in the ingress packet headers and policies provisioned on the router. CBF may be used with SR-TE Policy or RSVP-TE colored tunnels. 4.35.1F adds support for CBF with flex-algo colored tunnels.

Class based forwarding (CBF) is a means for steering network traffic into colored tunnels based on one or more fields of the ingress traffic. Rephrased, CBF is forwarding of traffic based on “classes” which are derived from fields in the ingress packet headers and policies provisioned on the router.

Segment Routing Traffic Engineering Policy (SR-TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend to steer traffic along any path without maintaining per flow state in every node. A headend steers traffic into an “SR Policy”. Class Based Forwarding (CBF) for SR-TE is a means for steering IP traffic into an SR Policy based on the ingress DSCP values. This mechanism is described in the section on Per-Flow Steering in the Segment Routing Policy Architecture Internet draft.

Class Based Forwarding (CBF) is a means for steering IP traffic into colored tunnels based on the ingress DSCP values. CBF may be used with SR-TE Policy, RSVP-TE or Flex-Algo colored tunnels.