Junos OS Interfaces Fundamentals ... - Juniper Networks

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OS 12.1 Interfaces Fundamentals Configuration Guide
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.
MX Series routers support DPCs, FPCs, and Modular Interface Cards (MICs). For
information about compatible DPCs, FPCs, PICs, and MICs, see the MX Series 3D Universal
Edge Routers Line Card Guide.
For M5, M7i, M10, and M10i routers, the FPCs are built into the chassis; you install the PICs
into the chassis.
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 AS PIC, or an optional integrated MS
PIC.
Logical Part of an Interface Name
Separators in an Interface Name
Channel Part of an Interface Name
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The M10 and M10i routers have space for up to eight PICs.
A routing matrix can have up to 32 FPCs (numbered 0 through 31).
For more information about interface naming for a routing matrix, see “Interface Naming
for a Routing Matrix Based on a TX Matrix Router” on page 63.
pic identifies the number of the PIC on which the physical interface is located. Specifically,
it is the number of the PIC location on the FPC. FPCs with four PIC slots are numbered 0
through 3. FPCs with three PIC slots are numbered 0 through 2. The PIC location is printed
on the FPC carrier board. For PICs that occupy more than one PIC slot, the lower PIC slot
number identifies the PIC location.
port identifies a specific port on a PIC or DPC. The number of ports varies depending on
the PIC. The port numbers are printed on the PIC.
The logical unit part of the interface name corresponds to the logical unit number, which
can be a number from 0 through 16,385 for all interface types except demux and PPPoE.
For these two interface types only, the range is 0 through 65,535.
There is a separator between each element of an interface name.
In the physical part of the name, a hyphen (-) separates the media type from the FPC
number, and a slash (/) separates the FPC, PIC, and port numbers.
In the virtual part of the name, a period (.) separates the channel and logical unit numbers.
A colon (:) separates the physical and virtual parts of the interface name.
The channel identifier part of the interface name is required only on channelized interfaces.
For channelized interfaces, channel 0 identifies the first channelized interface. For
channelized IQ and channelized IQE interfaces, channel 1 identifies the first channelized
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