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MX301 Ports and Interfaces

This topic describes the ports on the MX301 and their corresponding Junos OS interfaces.

Network Ports on the MX301

The MX301 router supports a maximum throughput of 1.6 Tbps through the WAN ports located in the front panel. A total of 26 WAN ports exist, divided into four groups. Each group is capable of a maximum of 400-Gbps throughput (see Figure 1). Depending on the optics and the ports used, the router can support speeds of 400 Gbps, 100 Gbps, 50 Gbps, 40 Gbps, 25 Gbps, 10 Gbps, and 1 Gbps.

Figure 1: WAN Port Group Arrangement WAN Port Group Arrangement

Table 1 summarizes the port speed capability of MX301.

Table 1: MX301 Network Ports
Form Factor Port Component Port Count Port Number Speeds Supported

QSFP

QSFP56-DD

2

0, 22

  • 400GbE

  • 4x100GbE

  • 8x50GbE

  • 3x100GbE

  • 2x100GbE

  • 100GbE

  • 1x25GbE

  • 1x10GbE

  • 1GbE

2

12, 13

  • 400GbE

  • 4x100GbE

  • 8x50GbE

  • 3x100GbE

  • 2x100GbE

  • 100GbE

  • 4x25GbE

  • 4x10GbE

  • 40GbE

  • 4x1GbE

QSFP28

4

1, 3, 23, 25

  • 100GbE

  • 4x25GbE

  • 40GbE

  • 4x10GbE

  • 1x25GbE

  • 1x10GbE

  • 4x1GbE

  • 1GbE

2

2, 24

  • 100GbE

  • 1x25GbE

  • 1x10GbE

  • 1GbE

SFP

SFP, SFP+, SFP28, SFP56

16

4–11, 14–21

  • 50GbE

  • 1x25GbE

  • 1x10GbE

  • 1GbE

See the Port Checker Tool for information on port combinations, port speeds, and channelizations supported on the MX301.

See the Hardware Compatibility Tool for a list of all supported optics for the MX301.

Interface Naming on the MX301

The ports on the MX301 have interfaces associated with them in Junos OS. These interfaces follow the naming convention described below:

type-fpc/pic/port:channel

  • type—Media type of the interface. For some interfaces, the media type depends on the transceiver plugged into the physical port.

    • ge—1 Gigabit Ethernet (GbE) interface

    • xe—10 GbE interface

    • et—25/40/50/100/200/400 GbE interfaces

  • fpc—Flexible PIC Concentrator. On the MX301, FPC number is 0.

  • pic—Physical Interface Card. On the MX301, PIC number is 0.

  • port—You can check the port number from the front panel of the MX301.

  • channel—Applicable only for channelized interfaces.

Interfaces on the MX301

Each network port on the MX301 has a unique interface on Junos OS associated with it.

You can use the show chassis hardware and show interfaces terse commands to view the hardware, installed transceivers, and corresponding interfaces.

The example below shows the actual hardware or transceivers plugged into a device and how Junos OS creates the corresponding interfaces. The output has been truncated to only show the relevant sections.