Frame-relay adaptive-shaping, Frame-relay bc – Enterasys Networks X-Pedition XSR CLI User Manual
Page 420
Frame Relay Map Class Commands
9-96 Configuring Frame Relay
Mode
Virtual Circuit configuration:
XSR(config-fr-dlci)#
Example
The first three commands in the following example set up Serial sub‐interface 1/0.1 with
associated DLCI 16. The last two commands define map class Hello.
XSR(config)#interface serial 1/0.1 point-to-point
XSR(config-if
XSR(config-subif)#frame-relay interface-dlci 16
XSR(config-fr-dlci)#class Hello
XSR(config)#map-class frame-relay Hello
XSR(config-map-class
frame-relay adaptive-shaping
This command enables and selects the mechanism to trigger adaptive shaping, the dynamic
imposition of traffic shaping parameters (CIR, Bc, Be) based on external feedback indicating
upstream congestion conditions.
Frame Relay switches use BECN (Back End Congestion Notification) to indicate congestion and
throttle the DTE traffic rate.
Syntax
frame-relay adaptive-shaping
Syntax of the “no” Form
The no command disables adaptive shaping:
no frame-relay adaptive-shaping
Mode
Map Class configuration:
XSR(config-map-class)#
Default
Disabled
Example
This example sets Frame Relay map‐class normlink with traffic shaping:
XSR(config)#map-class frame-relay normlink
XSR(config-map-class)#frame-relay adaptive-shaping
frame-relay bc
This command specifies the outgoing Committed burst size (Bc) for a Frame Relay map‐class.
Committed burst is specified in bits, but an implicit time factor is derived from the sampling
interval (Tc) on the switch, which is defined as the burst size divided by the Committed
Information Rate (CIR). This is expressed in the formula: Tc = Bc/CIR. For more information, refer
to
.