After you configure the advanced-feature-bandwidth-reservation boot flag and reboot with the new configuration, you can use the following procedure to verify that the switch reserved ports for configuring advanced features.
show sys-info
Switch#show sys-info General Info : SysDescr : Switch1 (w.x.y.z) BoxType: Switch1 SysName : Switch1 . . . Advanced Feature Bandwidth Reservation: -------------------------------------------------------------------------------- Reservation Mode : low Port Usage Info : 1/53 and 1/54 are not available to use