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
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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.
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ge—1 Gigabit Ethernet (GbE) interface
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xe—10 GbE interface
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mge—1/2.5/5/10 GbE Multirate Gigabit Ethernet interface
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et—25/40/100 GbE interface
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fpc—Flexible PIC Concentrator. On the SRX4300, FPC number is 0.
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pic—Physical Interface Card. On the SRX4300:
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PIC 0 consists of eight multirate RJ-45 ports.
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PIC 1 consists of eight SFP+ ports.
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PIC 2 consists of four SFP28 ports.
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PIC 3 consists of six QSFP28 ports.
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port—You can check the port number from the front panel of the SRX4300.
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channel—This is only applicable to channelized interfaces. For all other interfaces, this option is absent.
Network Ports on the SRX4300
| 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 |
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.
host@srx4300> show chassis hardware
Hardware inventory:
Item Version Part number Serial number Description
Chassis FQ3523AN0014 SRX4300
Midplane REV 04 650-155787 FQ3523AN0014 SRX4300
Routing Engine 0 BUILTIN BUILTIN SRX Routing Engine
CB 0 BUILTIN BUILTIN Control Board
FPC 0 BUILTIN BUILTIN SRX4300 FPC
PIC 0 BUILTIN BUILTIN 8x10G-T
PIC 1 BUILTIN BUILTIN 8xSFP+
Xcvr 0 REV 01 740-021308 A3DABVC SFP+-10G-SR
Xcvr 1 REV 01 740-021308 A3DACK6 SFP+-10G-SR
Xcvr 2 REV 01 740-021308 A3DACU9 SFP+-10G-SR
PIC 2 BUILTIN BUILTIN 4xSFP28
Xcvr 0 REV 01 740-021308 N6AE85M SFP+-10G-SR
Xcvr 1 REV 01 740-031980 CG15KN0UW SFP+-10G-SR
Xcvr 2 REV 01 740-031851 PKS4PXX SFP-SX
Xcvr 3 REV 01 740-011782 P9M0V8F SFP-SX
PIC 3 BUILTIN BUILTIN 6xQSFP28 Fan Tray 5, Front to Back Airflow - AFO
host@srx4300> show interfaces terse Interface Admin Link Proto Local Remote mge-0/0/0 up up mge-0/0/1 up up mge-0/0/1.0 up up mge-0/0/2 up down mge-0/0/2.0 up down mge-0/0/3 up up mge-0/0/4 up up mge-0/0/5 up down mge-0/0/6 up down mge-0/0/7 up down xe-0/1/0 up up xe-0/1/1 up up xe-0/1/2 up up
In this example:
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The interfaces for PIC 0 ports are automatically created (mge-0/0/0 to mge-0/0/7).
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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).
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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.
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There are no transceivers plugged into PIC 3.