To enable Frame Relay traffic shaping,
perform the following steps.
- Specify a map
class. Specify a map class to be defined with the map-class
frame-relay command:
Router(config)#map-class
frame-relay map-class-name
- Define the map class.
When you define a map class for Frame Relay, you can do the
following:
- Define the average and peak
rates (in bits per second) that are allowed on VCs associated
with the map class.
- Specify that the router
dynamically fluctuates the rate at which it sends packets,
depending on the BECNs it receives.
- Specify either a custom queue
list or a priority queue group to use on VCs associated with
the map class.
Once in map class configuration mode, you can define the average and
peak rates, specify that the router dynamically fluctuate the rate
at which it sends packets-depending on the BECNs it receives-or
specify either a custom queue list or a priority queue group to use
on VCs associated with the map class. See the following section,
"Ways to Define a Map Class," for different ways to define
a map class for traffic shaping.
- Enable Frame Relay on an
interface. After you have defined a map class with queuing and
traffic shaping parameters, enter interface configuration mode and
enable Frame Relay encapsulation on an interface with the encapsulation
frame-relay command,
discussed earlier in this chapter in the "Configuring Frame
Relay" section.
Router(config-if)#encapsulation
frame-relay
- Enable Frame Relay traffic
shaping on an interface with the frame-relay
traffic-shaping command.
Enabling Frame Relay traffic shaping on an interface enables both
traffic shaping and per-VC queuing on all the PVCs and SVCs on the
interface. Traffic shaping enables the router to control the
circuit output rate and react to congestion notification
information.
- Add the map class to VCs on
the interface. Add a map class to all VCs on the interface
with the
frame-relay class map-class-name
command. The
map-class-name argument must match the map-class-name of the map
class you configured:
Router(config-if)#frame-relay
class map-class-name
Note: The map class can be mapped
to the interface or to a specific subinterface on the interface.
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