All Juniper Networks devices use network interfaces to make physical connections to other devices. A connection takes place along media-specific physical wires through a port on a Physical Interface Module (PIM) installed in the J Series Services Router or an Input/Output Card (IOC) in the SRX Series Services Gateway. Each device interface has a unique name that follows a naming convention.
This section contains the following topics:
Each type of interface on a J Series or SRX Series device uses a particular medium to transmit data. The physical wires and data link layer protocols used by a medium determine how traffic is sent. See the JUNOS Software Feature Support Reference for SRX Series and J Series Devices for a list of media supported on each type of device.
You must configure each network interface before it can operate on the device. Configuring an interface can define both the physical properties of the link and the logical properties of a logical interface on the link.
The interfaces on the J Series and SRX Series devices are used for networking and services. Most interfaces are configurable, but some internally generated interfaces are not configurable. If you are familiar with Juniper Networks M Series and T Series routing platforms, be aware that device interface names are similar to but not identical with the interface names on those routing platforms.
This section contains the following topics:
The unique name of each network interface identifies its type and location and indicates whether it is a physical interface or an optional logical unit created on a physical interface:
The parts of an interface name are summarized in Table 5.
Table 5: Network Interface Names
Name Part |
Meaning |
Possible Values |
|---|---|---|
type |
Type of network medium that can connect to this interface. |
at—ATM-over-ADSL or ATM-over-SHDSL WAN interface bc—Bearer channel on an ISDN interface br—Basic Rate Interface for establishing ISDN connections ce1—Channelized E1 interface ct1—Channelized T1 interface dc—Delta channel on an ISDN interface dl—Dialer interface for initiating ISDN and USB modem connections e1—E1 WAN interface e3—E3 WAN interface fe—Fast Ethernet interface ge—Gigabit Ethernet interface reth—For chassis cluster configurations only, redundant Ethernet interface se—Serial interface (either RS-232, RS-422/499, RS-530, V.35, or X.21) t1—T1 (also called DS1) WAN interface t3—T3 (also called DS3) WAN interface wx—WXC Integrated Services Module (ISM 200) interface for WAN acceleration xe—10-Gigabit Ethernet interface In addition to these network interfaces, devices can have the following special interfaces: dsc, gr and gre, ip and ipip, lo, ls and lsi, lt, pd and pimd, pc, pe and pime, pp0, st, tap, and umd0. For more information, see Special Interfaces. |
slot |
Number of the chassis slot in which a PIM or IOC is installed. |
J Series Services Router: The slot number begins at 1 and increases as follows from top to bottom, left to right:
The slot number 0 is reserved for the out-of-band management ports. (See Management Interface.) SRX5600 and SRX5800 devices: The slot number begins at 0 and increases as follows from left to right, bottom to top:
SRX3400 and SRX3600 devices: The Switch Fabric Board (SFB) is always 0. Slot numbers increase as follows from top to bottom, left to right:
|
pim-or-ioc |
Number of the PIM or IOC on which the physical interface is located. |
J Series devices: This number is always 0. Only one PIM can be installed in a slot. SRX5600 and SRX5800 devices: For 40-port Gigabit Ethernet IOCs or 4-port 10-Gigabit Ethernet IOCs, this number can be 0, 1, 2, or 3. SRX3400 and SRX3600 devices: This number is always 0. Only one IOC can be installed in a slot. |
port |
Number of the port on a PIM or IOC on which the physical interface is located. |
J Series Services Routers:
On SRX5400 and SRX5800 devices:
On SRX3400 and SRX3600 devices:
Port numbers appear on the PIM or IOC faceplate. |
channel |
Number of the channel (time slot) on a fractional or channelized T1 or E1 interface. |
|
unit |
Number of the logical interface created on a physical interface. |
A value from 0 through 16384. If no logical interface number is specified, unit 0 is the default, but must be explicitly configured. For more information about logical interfaces, see Interface Logical Properties. |
For example, the interface name e1-5/0/0:15.0 on a J Series Services Router represents the following information:
The JUNOS Software that operates on J Series Services Routers and SRX Series Services Gateways was originally developed for Juniper Networks routing platforms that support many ports, on interface cards called Physical Interface Cards (PICs). On these larger platforms, PICs are installed into slots on Flexible PIC Concentrators (FPCs), and FPCs are installed into slots in the router chassis.
For J Series and SRX Series devices, PIM and IOC slots are detected internally by the JUNOS Software as FPC slots, and the PIM or IOC in each slot is identified as a “PIC.” For example, in the following output, the three PIMs located in slots 0, 2, and 5 are reported as FPC 0, FPC 2, and FPC 5, and PIM 0 is reported as PIC 0:
user@host> show chassis hardwareHardware inventory: Item Version Part number Serial number Description Chassis JN000192AB J4350 Midplane REV 02.04 710-010001 CORE99563 System IO REV 02.03 710-010003 CORE100885 System IO board Routing Engine RevX2.6 750-010005 IWGS40735451 RE-J.2 FPC 0 FPC PIC 0 2x FE FPC 2 RevX2.1 750-010355 CORE100458 FPC PIC 0 2x T1 FPC 5 REV 04 750-010353 AF04451744 FPC PIC 0 2x FE
To understand the abbreviations for PICs that appear in JUNOS CLI output, see Table 6. For details, see the J Series Services Routers Hardware Guide.
Table 6: PIC Abbreviations and Full Names