11-07-2002 08:29 AM - edited 03-02-2019 02:43 AM
Hi,
We have a Frame Relay PVC , which is being used with Traffic Shaping to limit Traffic within our CIR Limit.
However still we receive some FECN, BECN notifications from the Provider's Frame Switch and dropped packets counter also increments occasionally.
Ideally i think that if we are within our CIR, we shouldn't be getting any BECN\FECN etc ?
However is there an acceptable percentage of BECN\FECN that i can compromise on ?
We actually use this PVC for Voice (however it is still considered a DATA PVC in provider's network) and that is why i have configured it to not to go above our CIR, so there are no packets eligible to be dropped.
11-07-2002 08:32 AM
Please paste your configs for Traffic shaping. Settings of Traffic Shaping parameters, while using Voice have to be set correctly to avoid drop of packets.
11-07-2002 08:46 AM
dial-peer voice 2000 vofr
destination-pattern 2...
dtmf-relay
no vad
session target Serial0/0 103
interface Serial0/0
bandwidth 256
ip unnumbered Ethernet0/0
encapsulation frame-relay
no ip mroute-cache
frame-relay traffic-shaping
interface Serial0/0.3 point-to-point
description VOICE LINK
bandwidth 48
ip address x.x.x.x x.x.x.x
no ip mroute-cache
frame-relay interface-dlci 103 IETF
class voice
vofr cisco
frame-relay ip rtp header-compression
map-class frame-relay voice
no frame-relay adaptive-shaping
frame-relay cir 32000
frame-relay bc 320
frame-relay be 0
frame-relay mincir 32000
frame-relay fair-queue
frame-relay voice bandwidth 30000
frame-relay fragment 320
11-07-2002 09:22 AM
Looking at the configs, they do look fine.
Be = 0, Bc = cir/100 for voice, cir = mincir.
Since you are using VOFR, there is no need for Frame-relay ip rtp header compression command, as Voice is sent as Framerelay frames, and not as IP packets.
RTP header compresion could have been used, if you were using VOIP over framrelay.
Check to see in your "show frame-relay pvc" and see if your Frame-relay traffic shaping is shown as ACTIVE or INACTIVE. Traffic shaping will be active, only when your router is subscribing over the CIR.
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