Services Interface Naming Overview

Each interface has an interface name, which specifies the media type, the slot the FPC is located in, the location on the FPC that the PIC is installed in, and the PIC port. The interface name uniquely identifies an individual network connector in the system. You use the interface name when configuring interfaces and when enabling various functions and properties, such as routing protocols, on individual interfaces. The system uses the interface name when displaying information about the interface, for example, in the show interfaces command.

The interface name is represented by a physical part, a logical part, and a channel part in the following format:

The channel part of the name is optional for all interfaces except channelized DS3, E1, OC12, and STM1 interfaces.

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 is the media type, which identifies the network device. For service interfaces, it can be one of the following:

• cp—Flow collector interface.
• es—Encryption interface.
• gr—Generic routing 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.
• ls—Link services interface.
• lsq—Link services intelligent queuing (IQ) interface; also used for voice services.
• ml—Multilink interface.
• mo—Monitoring services interface. The logical interface mo-fpc/pic/port.16383 is an internally generated, nonconfigurable interface for router control traffic.
• mt—Multicast tunnel interface. This interface is automatically generated, but you can configure properties on it if needed.
• mtun—This interface is internally generated and not configurable.
• rlsq—Redundancy LSQ interface.
• rsp—Redundancy adaptive services interface.
• sp—Adaptive services interface. The logical interface sp-fpc/pic/port.16383 is an internally generated, nonconfigurable interface for router control traffic.
• tap—This interface is internally generated and not configurable.
• vp—Voice over IP (VoIP) interface, configured on J Series Services Routers only.
• vt—Virtual loopback tunnel interface.