Physical Part of an Interface Name

The physical part of an interface name identifies the physical device, which corresponds to a single physical network connector. This part of the interface name has the following format:

type-fpc/pic/port 

type is the media type, which identifies the network device. It can be one of the following:

• ae—Aggregated Ethernet interface. This is actually a virtual aggregated link and has a different naming format; for more information, see Configure Aggregated Interfaces.
• as—Aggregated SONET/SDH interface. This is actually a virtual aggregated link and has a different naming format; for more information, see Configure Aggregated Interfaces.
• at—ATM 1 or ATM 2 interface.
• cau4—Channelized STM-1 QPP interface (configured on Channelized STM-1 PIC with QPP).
• coc1—Channelized OC-1 QPP interface (configured on Channelized OC-12 PIC with QPP).
• coc12—Channelized OC-12 QPP interface (configured on Channelized OC-12 PIC with QPP).
• cstm1—Channelized STM-1 QPP interface (configured on Channelized STM-1 PIC with QPP).
• ct1—Channelized T1 QPP interface (configured on Channelized DS-3 PIC with QPP or Channelized OC-12 PIC with QPP).
• ct3—Channelized T3 QPP interface (configured on Channelized DS-3 PIC with QPP or Channelized OC-12 PIC with QPP).
• ce1—Channelized E1 QPP interface (configured on Channelized E1 PIC with QPP or Channelized STM-1 PIC with QPP).
• ds—DS-0 interface (configured on Channelized DS-3 to DS-0 PIC, Channelized E1 PIC, Channelized OC-12 PIC with QPP, Channelized DS-3 PIC with QPP, Channelized E1 PIC with QPP, or Channelized STM-1 PIC with QPP).
• dsc—Discard interface.
• e1—E1 interface (configured on E1 PIC or Channelized STM-1 PIC with QPP)).
• e3—E3 interface (including E3 QPP interfaces).
• es—Encryption interface.
• fe—Fast Ethernet interface.
• fxp—Management and internal Ethernet interfaces.
• ge—Gigabit Ethernet interface (including Gigabit Ethernet QPP interfaces).
• gr—Generic Route Encapsulation tunnel interface.
• gre—This interface is internally generated and not configurable.
• ip—IP-over-IP encapsulation tunnel interface.
• ipip—This interface is internally generated and not configurable.
• lo—Loopback interface. This interface is internally generated.
• ls—Link services interface.
• lsi—This interface is internally generated and not configurable.
• ml—Multilink interface (including Multilink Frame Relay and Multilink PPP).
• mo—Monitoring services interface (including monitoring services and monitoring services II).
• mt—Multicast tunnel interface (internal router interface for VPNs).
• mtun—This interface is internally generated and not configurable.
• oc3—OC-3 QPP interface (configured on Channelized OC-12 PIC with QPP).
• pe—Encapsulates packets destined for the Rendezvous Point (RP) router. This interface is present on the first-hop router.
• pd—De-encapsulates packets at the RP. This interface is present on the RP.
• pimd—This interface is internally generated and not configurable.
• pime—This interface is internally generated and not configurable.
• se—Serial interface (including EIA-530, V.35, and X.21 interfaces).
• so—SONET/SDH interface.
• sp—Adaptive services interface.
• t1—T1 interface (including Channelized DS-3 to DS-1 interfaces).
• t3—T3 interface (including Channelized OC-12 to DS-3 interfaces).
• tap—This interface is internally generated and not configurable.
• vt—Virtual loopback tunnel interface.

fpc identifies the number of the FPC card on which the physical interface is located. Specifically, it is the number of the slot in which the FPC card is installed. M40, M40e, M160, T320, and T640 platforms each have eight FPC slots that are numbered 0 through 7, from left to right as you are facing the front of the chassis. The M20 router has four FPC slots that are numbered 0 through 3, from top to bottom as you are facing the front of the chassis. The slot number is printed adjacent to each slot. M5, M7i, M10, and M10i routers do not use FPCs; you install the PICs individually. The M5 and M7i routers have space for up to four PICs. The M7i router also comes with an integrated Tunnel PIC, or an optional integrated Adaptive Services PIC. The M10 and M10i routers have space for up to eight PICs.

pic identifies the number of the PIC card on which the physical interface is located. Specifically, it is the number of the PIC location on the FPC. The four PIC slots are numbered 0 through 3. The PIC location is printed on the FPC carrier board. For PICs that occupy more than one PIC location, use the lower location number.

port identifies a specific port on a PIC. The number of ports varies depending on the PIC. The port slot numbers are printed on the PIC.