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| 8.7 |  | Traffic Shaping |
| 8.7.5 |  | Configuring GTS for Frame Relay networks |

The following commands are used to configure GTS in a Frame-Relay environment:

> Router(config-if)#traffic-shape rate bit-rate [burst-size [excess-burst-size]]

This is the standard GTS configuration command that can be applied to any interface to enable outbound traffic shaping:

> Router(config-if)#traffic-shape adaptive[bit-rate]

This command configures the minimum bit rate that traffic is shaped to when backward explicit congestion notification (BECNs) are received on an interface. It is common to set this to the CIR of the Frame-Relay link:

> Router(config-if)#traffic-shape fecn-adapt

This command configures reflection of BECN signals as forward explicit congestion notifications (FECNs) are received.

With adaptive GTS, the router uses BECNs to estimate the available bandwidth and adjust the transmission rate accordingly. The actual maximum transmission rate will be between the rate specified in the traffic-shape adaptive command and the rate specified in the traffic-shape rate command.