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SRX4300 Ports and Interfaces

Interface Naming on the SRX4300

The ports on the SRX4300 have interfaces associated with them in Junos OS. These interfaces follow the below naming convention:

type-fpc/pic/port:channel

  • type—This refers to the 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

    • mge—1/2.5/5/10 GbE Multirate Gigabit Ethernet interface

    • et—25/40/100 GbE interface

  • fpc—Flexible PIC Concentrator. On the SRX4300, FPC number is 0.

  • pic—Physical Interface Card. On the SRX4300:

    • PIC 0 consists of eight multirate RJ-45 ports.

    • PIC 1 consists of eight SFP+ ports.

    • PIC 2 consists of four SFP28 ports.

    • PIC 3 consists of six QSFP28 ports.

  • port—You can check the port number from the front panel of the SRX4300.

  • channel—This is only applicable to channelized interfaces. For all other interfaces, this option is absent.

Network Ports on the SRX4300

Table 1: SRX4300 Network Ports
Form Factor Port Component Port Count Speeds Supported FPC PIC Junos Interfaces

RJ-45

Multirate Gigabit Ethernet

8

1/2.5/5/10 G

0

0

mge-0/0/0 to mge-0/0/7

SFP+

SFP/SFP+

8

1/10 G

0

1

1G: ge-0/1/0 to ge-0/1/7

10G: xe-0/1/0 to xe-0/1/7

SFP28

SFP/SFP+/SFP28

4

1/10/25 G

0

2

1G: ge-0/2/0 to ge-0/2/3

10G: xe-0/2/0 to xe-0/2/3

25G: et-0/2/0 to et-0/2/3

QSFP28

QSFP/QSFP28

6

 4x10/4x25/2x50/40/100 G

0

3

et-0/3/0 to et-0/3/5
Note:

The BASE-T PIC 0 ports support autonegotiation. The SFP+ PIC 1 ports support 1 GbE SFP-T but do not support autonegotiation. The SFP28 PIC 2 ports and QSFP28 PIC 3 ports do not support SFP-T or autonegotiation.

See the Hardware Compatibility Tool for a list of all supported optics for the SRX4300.

Interfaces on the SRX4300

Each network port on the SRX4300 has a unique interface on Junos OS associated with it.

The interfaces for all PIC 0 ports are already created. The interfaces for PIC 1, PIC 2, and PIC 3 ports are created when you insert a transceiver into the respective port. PIC 1 and PIC 3 interfaces automatically determine the interface speed from the type of transceiver plugged into the port. PIC 2 interfaces are automatically created when using a 25G transceiver. When using a 10G/1G transceiver, you need to manually configure the interface speed using the CLI.

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.

In this example:

  • The interfaces for PIC 0 ports are automatically created (mge-0/0/0 to mge-0/0/7).

  • PIC 1 has three 10G transceivers plugged into ports 0 through 2. Junos OS creates corresponding 10G interfaces (xe-0/1-0 to xe-0/1/2).

  • PIC 2 has two 10G and two 1G transceivers plugged into it. Without explicit configuration, Junos OS does not identify these interface speeds and so does not create the PIC 2 interfaces.

  • There are no transceivers plugged into PIC 3.