Juniper Router Interface Naming:

Juniper router interface naming based on model:

• “media type-FPC number/PIC number/port number” It commonly knows as MM-F/P/T model for M series router.

• “media type-PIM slot number/virtual PIM number/port number, It commonly knows as MM-F/P/T for J series router. Fixed interface use PIM slot number 0.

FPC - Flexible PIC Concentrator which contain several PIC slots (on M series)

PIC – Physical Interface Card

PIM – Physical Interface Module (on J series) Each PIM contains a network processor that handles some of the packet processing functions.

• at: ADSL interface;

• dsc: Virtual interface that discards packets;

• fxp0: This is an Out of Band (OOB) management Ethernet interface. It is connected to the router's Routing Engine (RE) and can be used for Out of Band management access to the router. It can also be used to send management messages such as syslog or Simple Network Management Protocol (SNMP) traps. This interface is a nontransit interface, which means that traffic cannot enter this interface and exit via a LAN/WAN interface, nor can it enter a LAN/WAN interface and exit through the management interface.

• fxp1: This is an internal Fast Ethernet or Gigabit Ethernet (depending on the model of router) interface between the RE and the Packet Forwarding Engine (PFE). This interface is never configured but can be helpful when troubleshooting router issues. It is only in application-specific integrated circuit (ASIC) platforms (M/T-series) and not in the virtualized PFE J-series platforms.

• e1: E1 WAN interface;

• fe: Fast Ethernet(10/100) LAN interface;

• ge: Gigabit Ethernet (10/100/1000) LAN interface;

• gr,gre: Generic touting encapsulation (GRE) interface for tunnel services-this interface is internally generated and not configurable;

• ip, ipip: IP-over-IP interface-this interface is internally generated and not configurable;

• ls, lsi: link services interface- this interface is internally generated and not configurable;

• mt, mtun: Muticast GRE interface-this interface is internally generated and not configurable;

• pd, pimd: Protocol Independent Multicast(PIM) de-encapsulator interface-this interface is internally generated and not configurable;

• pe, pime: PIM encapsulator interface-this interface is internally generated and not configurable;

• pp: Point-to-point Protocol(PPP) interface-used for PPP over Ethernet (PPPoE);

• se: Serial interface(include EIA230, RS232, RS449, V.35 and X.21 interfaces);

• sp: Services interface;

• tap: The tap interface is internally generated and not configurable;

• t1: T1 (also called DS1) WAN interface;

• t3: T3 (also called DS3) WAN interface;