Frame Relay Traffic Shapping
CIR = Commited Information Rate
Tc = Timing Internal (1/8 sec)
Bc = Commited Burst
Be = Excess Burst
CIR/Tc = Bc 64000/8=8000bps Tc
Becn = backward explicit congestion notification
If router is congestion half way, it will send becn packet to the previous router ask to slowdown
Fecn = forwards explicit congetsion notification
if the router is congestion half way, it will send fecn packet to the router then router will send becn to previous router to ask it to slow down
switch(config)# map-class frame-relay SLOW
switch(config-map-if)#frame-relay adaptive-shapping becn
switch(config-map-if)#frame-relay mincir 24400
switch(config-map-if)#frame-relay cir 28800
switch(config-map-if)#frame-relay bc 28800/8 = 3600
switch(config-map-if)#frame-relay be 200
switch(config)#int s0/0
frame-relay traffic-shaping = enable interface to support map class
int s0/0.1
frame-relay class SLOW
frame-relay interface-dlci 102
show traffic-shape = to dislay the traffic and interface for traffic shaping
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ATM interface on cisco router
int ATM 0/1
ip address 172.16.1.1 255.255.255.0
atm pvc 56 (name) 0 (vpi) 115 (vci) aal5snap
