请问Juniper路由器中的服务端口:sp-0/0/0该怎么用,怎么定义,为什么要用这个端口,最好有例子

sp接口了完成某些功能而由系统创建虚拟端口般都需要Service PIC硬件支持所sp端口号取决于Service PIC槽位比service PIC插FPC2PIC1sp-2/1/0用show interfaces terse看sp端口具体位置比下面：lab@m10i-a-re0> show interfaces terseInterface Admin Link Proto Local Remotege-0/0/0 down downge-0/0/0.0 up down inet 10.0.60.33/28 multiservicege-0/0/0.32767 up down multiservicepc-0/0/0 up uppc-0/0/0.16383 up up inet pfh-0/0/0 up uppfh-0/0/0.16383 up up inet ge-0/0/1 up upge-0/0/1.0 up up inet 10.0.60.33/28 multiservicege-0/0/1.32767 up up multiservicege-0/0/2 up upge-0/0/3 up upso-0/1/0 up upso-0/1/1 up upso-0/1/2 up upso-0/1/3 up downge-0/2/0 up upgr-0/3/0 up upip-0/3/0 up upmt-0/3/0 up uppd-0/3/0 up uppe-0/3/0 up upsp-0/3/0 up up show chassis hardwareHardware inventory:Item Version Part number Serial number DescriptionChassis 32124 M10IMidplane REV 04 710-008920 CE7251 M10i MidplanePower Supply 0 Rev 05 740-008537 QF21996 AC Power SupplyPower Supply 1 Rev 05 740-008537 QF22019 AC Power SupplyHCM 0 REV 02 710-010580 CE6908 M10i HCMHCM 1 REV 02 710-010580 CE6905 M10i HCMRouting Engine 0 REV 09 740-009459 1000605088 RE-5.0Routing Engine 1 REV 01 740-021833 9005120947 RE-5.0CFEB 1 REV 14 750-023594 AABR6885 Enhanced CFEBFPC 0 E-FPC PIC 0 REV 14 750-012838 AAAN4169 4x 1GE(LAN), IQ2 Xcvr 0 REV 02 740-013111 9312722 SFP-T Xcvr 1 REV 02 740-013111 B381404 SFP-T Xcvr 2 REV 01 740-031851 PLG3346 SFP-SX Xcvr 3 REV 01 740-011782 P9C2758 SFP-SX PIC 1 REV 03 750-002971 HD2923 4x OC-3 SONET, MM PIC 2 REV 07 750-010238 CM3579 1x G/E SFP, 1000 BASE Xcvr 0 REV 01 740-007326 H5F0PCD SFP-SX PIC 3 REV 03 750-015590 JV2397 Adaptive Services-II