25output-mbs: Maximum burst size of ATM cell output, that is, the maximum cache size of ATM cell outputat the interface in cell number. The value ranges from 1 to 512.DescriptionUse the service vbr-rt command to set the service type of the current PVC to real-time variable bit rate(rt_VBR) and specify the related rate parameters.Use the undo service command to restore the default.The default service type of a PVC is UBR.You can configure the service type and related rate parameters for a PVC with this command, the serviceubr command, the service vbr-nrt command, or the service cbr command. The new configuration willreplace the old configuration.Setting of the arguments output-scr and output-mbs does not take effect on the router.Related commands: service vbr-nrt, service ubr, and service cbr.Examples# Create a PVC named aa with the VPI/VCI of 1/101. system-view[Sysname] interface Atm 3/1/1[Sysname-Atm3/1/1] pvc aa 1/101# Specify the service type of the PVC as rt_VBR, setting the PCR to 100000 kbps, the SCR to 50000 kbps,and the maximum burst size to 320 cells.[Sysname-atm-pvc-Atm3/1/1-1/101-aa] service vbr-rt 100000 50000 320shutdownSyntaxshutdownundo shutdownViewATM interface view, PVC viewDefault level2: System levelParametersNoneDescriptionUse the shutdown command to shut down an ATM main interface, ATM subinterface, or PVC.Use the undo shutdown command to bring up an ATM main interface, ATM subinterface, or PVC.By default, ATM main interfaces, subinterfaces, and PVCs are up.Examples# Shut down interface ATM 3/1/1. system-view[Sysname] interface Atm 3/1/1[Sysname-Atm3/1/1] shutdown