Legacy Frame Relay

Legacy FRTS has the following characteristics:

- Enabled with frame-relay traffic-shaping command at physical interface level
- Incompatible with GTS or MQC commands at subinterfaces or physical interface levels
- With FRTS you can enforce bitrate per-VC (VC-granular, unlike GTS), by applying a map-class to PVC
- When no map-class is explicitly applied to PVC, it’s CIR and Tc are set to 56K/125ms by default
- Shaping parameters are configured under map-class frame-relay configuration submode
- Allows to configure fancy-queueing (WFQ/PQ/CQ) or simple FIFO per-VC
- No option to configure fancy-queueing at interface level: interface queue is forced to FIFO (if no FRF.12 is configured)
- Allows for adaptive shaping (throttling down to minCIR) on BECN reception (just as GTS) and option to reflect incoming FECNs as BECNs
- Option to enable adaptive shaping which responds to interface congestion (non-empty interface queue)

Example


map-class frame-relay SHAPE_384K
 frame-relay cir 384000
 frame-relay bc 3840
 frame-relay be 0
 !
 ! Adaptive shaping: respond to BECNs and interface congestion
 !
 frame-relay adaptive-shaping becn
 frame-relay adaptive-shaping interface-congestion
 !
 ! Per-VC fancy-queueing
 !
 frame-relay fair-queue
!
interface Serial 0/0/0:0
 frame-relay traffic-shaping
!
interface Serial 0/0/0:0.1
 ip address 177.0.112.1 255.255.255.0
 frame-relay interface-dlci 112
  class SHAPE_384K


Reference
http://blog.ine.com/2008/01/22/legacy-frts/