B-11AMI Configuration CommandsB.3 Switch Board Configuration CommandsThis submenu allows the user to configure default values for the switchboard. The user can display the list of available subcommands by typingboard ? at the configuration level.localhost::configuration> board ?clockscale show topologyB.3.1 Configuring the Clock Scaling Factor on a Switch BoardThis is an advanced command that allows the user to set the clock scaling fac-tor for traffic policing on a switch board. The switch board represents units oftime (i.e., burst tolerances) in internal units of clock ticks. Because of the 40MHz clock used on the switch fabric, the maximum unit of time that can beused by the traffic policing hardware is 0.838 seconds. However, the burst tol-erance of some VBR connections is larger than 0.838 seconds, so they can notbe correctly policed by the switch. To accommodate these cases, it is possibleto scale the clock to represent larger amounts of time with the same numberof ticks. The user must enter the following parameters:NOTE: This command is only useful when perform-ing traffic policing on VBR traffic with anextremely large burst tolerance that is des-tined for a very low speed link. If these condi-tions are not represented in your network, itis recommended that you leave this value atthe default setting.localhost::configuration board> clockscale board Indicates the number of the board being managed.factor Indicates the factor by which you want to scale theclock. The scaling factor multiplied by 0.838 secondsshould be greater than the burst tolerance of the con-nection. The default is 1.
