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Port Speed on QFX Series Switches

Learn supported port speeds, channelization, and interface naming conventions of QFX Series switches.

Port Speed on QFX5100-24Q Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5100-24Q, see Hardware Compatibility Tool (HCT).

For more information about QFX5100-24Q switches, see QFX5100 Switch Hardware Guide.

Table 1: Port Speed on QFX5100-24Q Switches

PIC 0

Port Number

Port Speeds Supported

PIC 0

0-23 (QSFP+ ports)

40 Gbps

QSFP+ supports channelization into 4x10 Gbps using breakout cables.

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Guidelines:

  • In standalone mode, any of the 24 ports 0 through 23 can be configured as either uplink or access ports.

  • You can use 40-Gigabit Ethernet QSFP+ transceivers and QSFP+ DAC cable in any downstream port.

  • You can configure up to 4 of the 40 Gbps ports as uplinks.

  • The QFX5100-24Q device has two module bays for the optional expansion modules, QFX-EM-4Q or EX4600-EM-8F. QFX-EM-4Q can add a total of 8 additional QSFP+ ports to the chassis and EX4600-EM-8F can provide 8 additional 10 Gbps Enhanced SFP+ ports. The QFX-EM-4Q ports can also be configured as either access ports or as uplink ports, but only ports 0 and 2 can be channelized using port mode.

  • When fully populated with two QFX-EM-4Q Expansion Modules, the QFX5100-24Q device has 128 physical ports. However, only 104 logical ports can be used for port channelization. Depending on the system mode you configure for channelization, different ports are restricted. If you attempt to channelize a restricted port, the configuration is ignored.

  • Virtual Chassis and VCF: The QFX5100-24Q device operates as a standalone switch, a member of a QFX Series Switches Virtual Chassis, or as a spine or leaf device in a QFX5100 VCF (VCF). QFX Series Switches Virtual Chassis support up to 10 members. QFX5100 VCF supports 20 QFX5100 and EX4300 devices, of which four QFX5100 devices can be configured as spines.

Port Speed on QFX5110-48S Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5110-48S, see Hardware Compatibility Tool (HCT).

For more information about QFX5110-48S switches, see QFX5110 Switch Hardware Guide.

Table 2: Port Speed on QFX5110-48S Switches

PIC

Port Number

Port Speeds Supported

PIC 0

0-47 (SFP+ ports)

100 Mbps

1 Gbps

10 Gbps

Starting in Junos OS release 20.1R1, in addition to 1 Gbps, 10 Gbps, 40 Gbps, 100 Gbps speeds, now you can also configure 100-Mbps speed using the set interfaces interface-name speed 100M command. With QFX-SFP-1GE-T connected, you can also configure 100 Mbps on QFX5110-48S switches.

48-51 (QSFP28 ports)

40 Gbps

100 Gbps

You can configure each port as an independent 100-GbE port or as an independent 40-GbE port.

QSFP28 ports support channelization of 40 Gbps into 4x10 Gbps interfaces using breakout cables.
Note:

QFX5110 Series Switches do not support autonegotiation on 1G SFP transceivers.

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Guidelines:

  • On QFX5110-48S standalone switches, the FPC value is always 0.

  • You cannot configure channelized interfaces to operate as VCPs.

Virtual Chassis and Virtual Chassis Fabric (VCF)

To connect QFX5110 switches as members in a QFX5110 Virtual Chassis, you need a pair of dedicated ports on each switch and cables that link each member in the Virtual Chassis into a ring topology. Each member in the ring has at least one direct VCP connection to an upstream and downstream member. QFX5110 switches are recommended in the primary, backup, or line card role. You might only mix QFX5100 members with QFX5110 members in a QFX5110 Virtual Chassis; no other QFX Series Switches or EX Series switches are supported.

Port Speed on QFX5120-32C Switches

For information about platform support, see Hardware Compatibility Tool (HCT).

For more information about QFX5120-32C switches, see QFX5120 Switch Hardware Guide.

Table 3: Port Speed on QFX5120-32C

PIC

Port Number

Port Speed Supported

PIC 0

0-31 (QSFP28 ports)

40 Gbps

100 Gbps

Supports channelization of 100 Gbps into 2x50 Gbps interfaces or 4x25 Gbps using breakout cables.

Supports channelization of 40 Gbps into 4x10 Gbps interfaces using breakout cables.

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Port Speed on QFX5120-48T Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5120-48T, see Hardware Compatibility Tool (HCT).

For more information about QFX5120-48T switches, see QFX5120 Switch Hardware Guide.

Table 4: Port Speed on QFX5120-48T Switches

PIC

Port Number

Port Speeds Supported

PIC 0

0-47 (RJ-45 ports)

1 Gbps

10 Gbps

RJ-45 ports does not support channelization
48-53 (QSFP28 ports)

40 Gbps

100 Gbps

Channelization support:

  • All the six QSFP28 ports support channelization of 100 Gbps into 2x50 Gbps or 4x25 Gbps interfaces.

  • Only ports 50 and 51 support 4x10 Gbps channelization in addition to 4x25 Gbps.

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Port Speed on QFX5120-48Y Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5120-48Y, see Hardware Compatibility Tool (HCT).

For more information about QFX5120-48Y switches, see QFX5120 Swich Hardware Guide.

Table 5: Port Speed on QFX5120-48Y Switches

PIC

Port Number

Port Speeds Supported

PIC 0

0-47 (SFP+ ports)

1 Gbps

10 Gbps

25 Gbps

SFP+ ports do not support channelization.

48-55 (QSFP28 ports)

40 Gbps

100 Gbps

Supports channelization of 100 Gbps into 4x25 and 40 Gbps into 4x10 interfaces.

QSFP28 ports are uplink ports and support auto channelization.

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Guidelines:

  • You cannot configure channelized interfaces to operate as VCPs.

  • QFX5120-48Y does not support autonegotiation when 1-Gbps fiber SFP transceiver is plugged in. In such cases, we recommend to disable autonegotiation on the remote end device. But, QFX5120-48Y switches with 1-Gbps copper SFP transceiver supports autonegotiation, as the physical layer within the transceiver handles autonegotiation.

Port Speed on QFX5120-48YM Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5120-48YM, see Hardware Compatibility Tool (HCT).

For more information about QFX5120-48YM switches, see QFX5120 Swich Hardware Guide.

Table 6: Port Speed on QFX5120-48YM Switches

PIC

Port Number

Port Speed Supported

PIC 0

0-47 (SFP28 ports)

1 Gbps

10 Gbps

25 Gbps

48-55 (QSFP28 ports)

40 Gbps

100 Gbps

Ports 50 and 52 support channelization.

QSFP28 ports are uplink ports and support auto channelization.

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Guidelines:

  • The SFP28 ports are grouped in quads (groups of four) and you can configure the speed of the ports only in quads; you cannot configure the speed for a single SFP28 port.

  • Auto-channelization does not support VCPs.

  • System reboot is not required after port channelization.

  • QFX5120-48YM does not support autonegotiation when 1-gigabit fiber SFP transceiver is plugged in. In such cases, we recommend to disable auto-negotiation on the remote end device.

Port Speed on QFX5130-32CD Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5130-32CD, see Hardware Compatibility Tool (HCT).

For more information about QFX5130-32CD switches, see QFX5130-32CD Swich Hardware Guide.

Table 7: Port Speed on QFX5130-32CD Switches

PIC

Port Number

Port Speeds Supported

PIC 0

0-31 (QSFP/QSFP28 ports)

40 Gbps

100 Gbps

200 Gbps

400 Gbps

Supports channelization of 400 Gbps into 4x100 Gbps, or 2x200 Gbps, or 8x50 interfaces.

Supports channelization of 200 Gbps into 2x100 Gbps interfaces.

Supports channelization of 100 Gbps into 2x50 Gbps or 4x25 Gbps interfaces.

Supports channelization of 40 Gbps into 4x10 Gbps interfaces.

32-32 (SFP+ ports)

10 Gbps

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Guidelines:

  • All the QSFP ports operate in 400 Gbps by default.

  • QFX5130-32CD supports up to 16x400G-ZR; but when you use 400G-ZR or high power optics, you must configure the adjacent ports Unused.

Port Speed on QFX5130-48C/QFX5130-48CM Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5130-48C/48CM, see Hardware Compatibility Tool (HCT).

QFX5130-48C/48CM supports the following port configurations:

  • 48x100GbE / 50GbE / 25GbE / 10GbE on SFP-DD ports

  • 8x400GbE / 200GbE / 100GbE / 40GbE on QSFP-DD ports

  • 2x10GbE on SFP+ ports

See Table 8 for details.

The QSFP-DD ports support the following channelizations:

  • 4x100GbE

  • 2x200GbE

  • 8x50GbE

  • 4x25GbE

  • 4x10GbE

The SFP-DD ports support 2x50G channelization.

Table 8: Port Speed for QFX5130-48C
PIC Ports Optic Device  Interface Speed
PIC 0 Port 0-47(channelized Mode)

By default, all the active ports operate in 100-Gigabit Ethernet mode.

SFP DD 100GbE

 1x100GbE

SFP DD 50GbE 

1x50GbE

SFP DD 25GbE 

1x25GbE

SFP DD 10GbE 

1x10GbE

Port 48 – 55

(Channelized mode)

By default, all the active ports operate in 400 GbE mode.

QSFP DD 400GbE 

1x400GbE

4x100GbE

2x200GbE

8x50GbE

QSFP+ 40GbE 

1x40GbE
4x10GbE

QSFP28 100GbE 

1x100GbE
4x25GbE
 

Ports 56 and 57 (Non-channelized mode)

By default, all active ports operate in 10 GbE mode.

Interface Naming Conventions

Table 9: Interface Naming Conventions
PIC Interface Type Interfaces

PIC 0

100GbE/50GbE/25GbE/10GbE SFP-DD ports (0-47)

 et-0/0/0 – et-0/0/47

400GbE/200GbE/100GbE/40GbE QSFP-DD ports (48-55)

 et-0/0/48 – et-/0/0/55
10GbE SFP+ ports (56-57) et-0/0/56 – et-0/0/57

Channelization

Follow the guidelines below to channelize port speeds:

QSFP-DD:

  • To channelize QSFP-DD port into 8x50G, mark five SFP-DD ports as unused.

    Example: To channelize et-0/0/48, mark et-0/0/0 to et-0/0/4 as unused.

  • To channelize QSFP-DD port into 4x100G, 4x25G, or 4x10G, mark one SFP-DD port as unused.

    Example:

    • To channelize et-0/0/49, mark et-0/0/5 as unused.

    • To channelize et-0/0/52, mark et-0/024 as unused.

  • To channelize QSFP-DD ports into 2x200G, do not mark any port as unused.

Table 10: Unused SFP Ports for 8x50G QSFP Port Channelization

Port to Be Channelized

Ports Unused

48

0

1

2

3

4

49

5

6

7

8

9

50

12

13

14

15

16

51

17

18

19

20

21

52

24

25

26

27

28

53

29

30

31

32

33

54

36

37

38

39

40

55

41

42

43

44

45
Table 11: Unused SFP Ports for 4x100G, 4x25G, and 4x10G QSFP Port Channelization

Port to Be Channelized

Ports Unused

48

0

49

5

50

12

51

17

52

24

53

29

54

36

55

41

See Table 8 for details.

Supported FEC Modes

See Table 12 for supported FEC modes on different transceivers.

Table 12: FEC Modes Supported on Transceivers
Optical Transceiver FEC Mode

SFP-DD-100GbE

FEC91-RS544

SFP-DD-50GbE

FEC91-RS544

SFP-DD-25GbE

FEC91

SFP-DD-10GbE

None

QSFP56-DD-400GbE

FEC 119

QSFP56-200GbE

FEC91-RS544

QSFP28-100GbE

FEC91

QSFP+-40GbE

None

SFP+-10GbE

None\

Port Speed on QFX5200-32C Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5200-32C, see Hardware Compatibility Tool (HCT).

For more information about QFX5200-32C switches, see QFX5200 Swich Hardware Guide.

Table 13: Port Speed on QFX5200-32C Switches

PIC

Port Number

Port Speed Supported

PIC 0

0-31

40 Gbps

100 Gbps

Supports channelization of 100 Gbps into 2x50 Gbps interfaces or 4x25 Gbps using breakout cables.

Supports channelization of 40 Gbps into 4x10 Gbps interfaces using breakout cables.

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Guidelines:

  • You cannot configure channelized interfaces to operate as Virtual Chassis ports.

  • You can use any port as either 100 Gbps Ethernet or 40 Gbps Ethernet interfaces.

  • On QFX5110-48S standalone switches, the FPC value is always 0.

Port Speed on QFX5210-64C Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5210-64C, see Hardware Compatibility Tool (HCT).

For more information about QFX5210-64C switches, see QFX5210 Switch Hardware Guide.

Table 14: Port Speed on QFX5210-64C Switches

PIC

Port Number

Port Speeds Supported

PIC 0

0-63 (QSFP28 ports)

40 Gbps

100 Gbps

Supports channelization of 100 Gbps into 2x50 Gbps interfaces or 4x25 Gbps using breakout cables.

Supports channelization of 40 Gbps into 4x10 Gbps interfaces using breakout cables.

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Guidelines:

  • QSFP28 ports are divided into two ranges; 0-31 as lower order ports, and 32-63 as higher order ports.

  • Channelization is supported only on lower order ports 0-31.

  • You can use any port as either 100 Gbps or 40 Gbps interfaces.

  • The port channelization on QFX5210 switches occurs automatically when the total number of ports does not exceed 128 BCM ports and when the number of port per pipe does not exceed 32 BCM ports.

Port Speed on QFX5230-64CD Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5230-64CD, see Hardware Compatibility Tool.

QFX5230-64CD has 64x400GbE/200GbE/100GbE/40GbE on QSFP56-DD ports and two SFP+ ports with 10 GbE. See Table 15 for details.

Table 15: Port Speed for QFX5230-64CD
PIC Ports Optic Device  Interface Speed
PIC 0 Port 0-63 (Channelized Mode)

By default, all the active ports operate in 400-Gigabit Ethernet mode.

QSFP-DD

1x400GbE

4x100GbE

2x200GbE

1x200GbE

2x100GbE

QSFP

2x100GbE

1x200GbE

1x100GbE

2x50GbE

1x50GbE

4x50GbE

4x25GbE

1x40GbE

4x10GbE

Ports 64 and 65 (Non-channelized mode)

By default, all active ports operate in 10 GbE mode.

SFP+ ports

1x10 GbE

Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Follow these guidelines when you configure the port speed:

  • Use only the bottom 16 ports for the 400G-ZR and 400G-ZR-M. You can use the ports 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, and 63. If you use 400G-ZR and 400G-ZR-M optics on ports other than the bottom 16, you get High power optics cannot be supported on the port alarm.

  • Optic ports that support 400G-ZR-M (33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, and 63) support 3x100 GbE channelization.

Interface Naming Conventions

Table 16 lists the interface naming conventions for QFX5230-64CD switches.
Table 16: Interface Naming Conventions
PIC Interface Type Interfaces

PIC 0

400GbE/200GbE/100GbE/40GbE QSFP-DD ports (0-63)

 et-0/0/0 – et-0/0/63
10 GbE SFP+ ports (64-65) et-0/0/64 – et-0/0/65

Channelization

QFX5230-64CD supports the following channelizations:

  • 1x400GbE

  • 4x100GbE

  • 1x200GbE

  • 2x200GbE

  • 4x100GbE

  • 2x100GbE

  • 2x50GbE

  • 1x100GbE

  • 1x50GbE

  • 4x25GbE

  • 4x10GbE

  • 1x40GbE

See Table 15 for details.

Supported FEC Modes

Table 17 lists the supported FEC modes

Table 17: FEC Modes Supported on Transceivers
Optical Transceiver FEC Mode

QSFP56-DD-400GbE

FEC119

QSFP56-DD-200GbE

FEC91-RS544

QSFP28-DD-100GbE

FEC91

QSP+-40GbE

None

SFP+-10GbE

None

Port Speed on QFX5240 Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5240-64OD, see Hardware Compatibilty Tool.

QFX5240-64OD supports the following speeds:

  • 800 Gbps on octal small form factor pluggable (OSFP) ports

  • 10 Gbps on SFP ports

Table 18: Port Speed Details and Description for QFX5240-64OD

PIC

Number and Type of Ports

Port Speed Supported

Default Speed

PIC 0

0-64 (OSFP ports).

800 Gbps

2x400 Gbps

4x200 Gbps

8x100 Gbps

800 Gbps

64-65 (SFP ports).

10 Gbps

10 Gbps
Table 19: Port Speed Details and Description for QFX5240-64QD

PIC

Number and Type of Ports

Port Speed Supported

Default Speed

PIC 0

0-64 (QSFP-DD ports).

800 Gbps

2x400 Gbps

4x200 Gbps

8x100 Gbps

800 Gbps

64-65 (SFP ports).

10 Gbps

10 Gbps

Channelization

See Channelize Block of Ports or Individual Port.

You can channelize OSFP ports into:

  • 1x800 Gbps

  • 2x400 Gbps

  • 4x200 Gbps

  • 8x100 Gbps

Table 20: Interface Naming Conventions for QFX5240-64OD

PIC

Interface Type

Interface Speed

Interfaces

PIC 0

OSFP

1x800 Gbps

et-0/0/0-et-0/0/63

2x400 Gbps

et-0/0/0:0

et-0/0/0:1

4x200 Gbps

et-0/0/0:0

et-0/0/0:1

et-0/0/0:2

et-0/0/0:3

8x100 Gbps

et-0/0/0:0

et-0/0/0:1

et-0/0/0:2

et-0/0/0:3

et-0/0/0:4

et-0/0/0:5

et-0/0/0:6

et-0/0/0:7

SFP

1x10 Gbps

et-0/0/0

You can channelize QSFP-DD ports into:

  • 1x800 Gbps

  • 2x400 Gbps

  • 4x200 Gbps

  • 8x100 Gbps

Table 21: Interface Naming Conventions for QFX5240-64QD

PIC

Interface Type

Interface Speed

Interfaces

PIC 0

QSFP-DD

1x800 Gbps

et-0/0/0-et-0/0/63

2x400 Gbps

et-0/0/0:0

et-0/0/0:1

4x200 Gbps

et-0/0/0:0

et-0/0/0:1

et-0/0/0:2

et-0/0/0:3

8x100 Gbps

et-0/0/0:0

et-0/0/0:1

et-0/0/0:2

et-0/0/0:3

et-0/0/0:4

et-0/0/0:5

et-0/0/0:6

et-0/0/0:7
   
   

SFP

1x10 Gbps

et-0/0/0
Use the speed command to set the speed on tri-rate copper SFP port. For information about how to configure the speed at the chassis level, see Table 1. For information about how to configure the speed at the interfaces level, see Table 2.

Guidelines:

  • You need not mark the corresponding pair port as "unused" to channelize one interface to 8x100 Gbps.

  • You can channelize only even numbered ports into 8x100 Gbps mode.

  • If you channelize any even port into 8x100 Gbps, then its paired port works only in 1x800 Gbps or 2x400 mode.

  • QFX5241-64QD and QFX-5240-64QD switches support the ZR optics only on half of the 64 ports. The the front panel ports in the middle rows, rows 2 and 3, support high power optics as shown below:

    - - - - - - - - - - - - - - - -
    1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61
    2 6 10 14 18 22 26 30 34 38 42 46 50 54 58 62
    - - - - - - - - - - - - - - - -

Port Speed on QFX5241-32 OD Switches

For information about platform support, see Hardware Compatibility Tool (HCT).

QFX5241-32OD has 32 OSFP ports that support 800 Gbps and two SFP28 ports that support 10 Gbps. You can channelize the OSFP ports but not the two SFP28 ports.

Table 22: Port Speed on QFX5241-32OD Switches
PIC Ports Supported Speeds
PIC 0 32 OSFP ports (0-31) 800 Gbps
1x800 Gbps
2x400 Gbps
4x200 Gbps
Two SFP28 ports (32-33) 10 Gbps
Table 23: Interface Naming Conventions for QFX5241-32OD Switches
PIC Interface Speed Interface Name Format
PIC 0 1x800 Gbps et-x/y/z
2x400 Gbps et-x/y/z:0
et-x/y/z:1
8x100 Gbps et-x/y/z:0
et-x/y/z:1
et-x/y/z:2
et-x/y/z:3
et-x/y/z:4
et-x/y/z:5
et-x/y/z:6
et-x/y/z:7
4x100 Gbps et-x/y/z:0
et-x/y/z:1
et-x/y/z:2
et-x/y/z:3
8x50 Gbps et-x/y/z:0
et-x/y/z:1
et-x/y/z:2
et-x/y/z:3
et-x/y/z:4
et-x/y/z:5
et-x/y/z:6
et-x/y/z:7

Port Speed on QFX5241-64OD/QD Switches

To view the supported transceivers, optical interfaces, and DAC cables on QFX5241-64OD and QFX5241-64QD switches, see Hardware Compatibility Tool (HCT).

For more information about QFX5241-64OD and QFX5241-64QD switches, see QFX5241-64OD and QFX5241-64QD Switches Hardware Guide.

On QFX5241-64OD switches:

  • Configure native 800 Gbps on OSFP ports

  • Configure 10 Gbps on SFP28 ports

  • Channelize OSFP ports to 2x400 Gbps or 8x100 Gbps

On QFX5241-64QD switches:

  • Configure native 800 Gbps, 400 Gbps, or 100 Gbps  on QSFP-DD ports

  • Configure 10 Gbps on SFP28 ports

  • Channelize QSFP-DD ports to 2x400 Gbps, 4x100 Gbps, 8x100 Gbps, or 8x50 Gbps

You can channelize only even ports for 8x100G and 8x50G channelization.

Table 24: Port Speed on QFX5241-64OD Switches
PIC Ports Type of Ports Supported Speeds
PIC 0 0-63 OSFP (channelized mode) 800 Gbps (Default speed)
2x400 Gbps
8x100 Gbps
64-65 SFP28 (non-channelized) 10 Gbps
Table 25: Interface Naming Conventions for QFX5241-64OD
PIC Interface Type Interface Speed Interfaces
PIC 0 OSFP 1x800 Gbps et-x/y/z
2x400 Gbps et-x/y/z:0
et-x/y/z:1
8x100 Gbps et-x/y/z:0
et-x/y/z:1
et-x/y/z:2
et-x/y/z:3
et-x/y/z:4
et-x/y/z:5
et-x/y/z:6
et-x/y/z:7
SFP28 1x10 Gbps et-x/y/z
Table 26: Port Speed on QFX5241-QD Switches
PIC Ports Type of Ports Supported Speeds
PIC 0 0-63 QSFP-DD (channelized) 800 Gbps
2x400 Gbps
8x100 Gbps
4x100 Gbps
8x50 Gbps
64-65 SFP28 (non-channelized) 10 Gbps
Table 27: Interface Naming Conventions for QFX5241-64QD
PIC Interface Type Interface Speed Interfaces
PIC 0 QSFP-DD 1x800 Gbps et-x/y/z
2x400 Gbps et-x/y/z:0
et-x/y/z:1
8x100 Gbps et-x/y/z:0
et-x/y/z:1
et-x/y/z:2
et-x/y/z:3
et-x/y/z:4
et-x/y/z:5
et-x/y/z:6
et-x/y/z:7
8x50 Gbps et-x/y/z:0
et-x/y/z:1
et-x/y/z:2
et-x/y/z:3
et-x/y/z:4
et-x/y/z:5
et-x/y/z:6
et-x/y/z:7
SFP28 1x10 Gbps et-x/y/z

Port Speed on QFX5700 Switches

The QFX5700 switches have QFX5K-FPC-20Y line card (20x10G/25G FPC), QFX5K-FPC-16C line card (16x100GE FPC) and QFX5K-FPC-4CD line card (4x400G FPC) with support of 20x25GE SFP28 ports, 16x100GE QSFP28 and 4x400GE QSFP56-DD ports.

Port Speed on QFX5K-FPC-20Y Line Card

The QFX5K-FPC-20Y line card contains a total of 20 (SFP+, SFP28, and SFP56) ports.

You can configure QFX5K-FPC-20Y line card with 1-Gbps, 10-Gbps, 25-Gbps, or 50-Gbps speeds.

Starting in Junos OS Evolved Release 22.2R1, we support 50-Gbps speed on QFX5K-FPC-20Y line card.

You can use all 20 ports when you insert the line card in 0, 2, 4, or 6 slots and interfaces for all 20 ports are created. When you insert the line card in slots 1, 3, 5, or 7, only first 16 interfaces are created. For example, if you insert the line card in slot 1, you can only use the first 16 ports. If you want to use all the 20 ports in the line card, you must insert the line card in 0, 2, 4, or 6 slots.

ZTP with speeds of 10-Gbps, 25-Gbps, and 50-Gbps only for IPv4 is supported on JNP-FPC-20Y line card. Default speed is 25-Gbps.

Example for speed configuration

Use the following command to configure speed:

Example:

Table 28: Port Speed for QFX5K-FPC-20Y Line Card
Slot Number Port Speed Supported Non-Channelized Interfaces Naming Formats Default Speed

0

50-Gigabit Ethernet

25-Gigabit Ethernet

10-Gigabit Ethernet

1-Gigabit Ethernet

et-0/0/0 - et-0/0/19

All active ports operate in 25GbE mode.

1

et-1/0/0 - et-1/0/15

2

et-2/0/0 - et-2/0/19
3

et-3/0/0 - et-3/0/15
4

et-4/0/0 - et-4/0/19
5 et-5/0/0 - et-5/0/15
6

et-6/0/0 - et-6/0/19

7

et-7/0/0 - et-7/0/15

Port Speed on QFX5K-FPC-16C Line Card

The QFX5K-FPC-16C line card contains a total of 16 QSFP28 ports.

You can configure QFX5K-FPC-16C line card with 100-Gbps or 40-Gbps speeds.

You can channelize the QSP28 ports to four 25-Gigabit Ethernet or four 10-Gigabit Ethernet ports. By default, the line card comes up in 100-Gbps speed.

Follow these guidelines when you configure the channelization:

  • You can channelize ports (0,4,8,12) as four 10-Gigabit Ethernet interfaces, or four 25-Gigabit Ethernet interfaces. For example, et-5/0/0, et-5/0/4, et-5/0/8, and et-5/0/12 can be channelized into four 10-Gigabit Ethernet interfaces, or four 25-Gigabit Ethernet mode.
  • If you channelize a port, then the next three consecutive ports (1,2,3,5,6,7,9,10,11,13,14,15) cannot be used for any purpose. For example, if et-5/0/4 is channelized into four 25-Gigabit Ethernet mode, then et-5/0/5, et-5/0/6 and et-5/0/7 cannot be used for any purpose.

For example: If you want to channelize port 0 to 40-Gbps or 100-Gbps speed to four 25-Gigabit Ethernet or four 10-Gigabit Ethernet speed, then port 1, 2, and 3 must be set to unused.

Table 29 summarizes how the speed can be set on other ports while channelizing speeds in port 0 or 4 or 8 or 12.

Table 29: QFX5K-FPC-16C Line Card valid 100 or 40 or 10 or 25-Gbps configuration

Ports

Ports Configurable as 100 or 40 Gbps

Ports Configurable as Channelized 4x10 Gbps

Ports Configurable as Channelized 4 x 25 Gbps

0

✓

✓

✓

1

✓

Configure as unused

Configure as unused

2

✓

Configure as unused

Configure as unused

3

✓

Configure as unused

Configure as unused

4

✓

✓

✓

5

✓

Configure as unused

Configure as unused

6

✓

Configure as unused

Configure as unused

7

✓

Configure as unused

Configure as unused

8

✓

✓

✓

9

✓

Configure as unused

Configure as unused

10

✓

Configure as unused

Configure as unused

11

✓

Configure as unused

Configure as unused

12

✓

✓

✓

13

✓

Configure as unused

Configure as unused

14

✓

Configure as unused

Configure as unused

15

✓

Configure as unused

Configure as unused

In QFX5K-FPC-16C line card, you can commit the configurations in the following two ways:

  • You can configure the unused ports first and commit that configuration separately. After committing the unused port, you can configure the number-of-sub ports and commit the configuration again.
  • Or, you can configure both unused ports and number-of-sub ports together and commit the configuration once.

Example for channelization configuration

  1. Block the port following the next three consecutive ports 100-Gbps or 40-Gbps port as unused and commit the configuration.

  2. Configure the speed on the desired port (et-0/0/y) as 25-Gbps or 10-Gbps and commit the configuration.

Example to delete channelization configuration

To remove the channelization configuration from a set of QFX5K-FPC-16C line card ports, delete the configuration from the channelized port and commit the configuration. For example:

To enable port level speed configuration, use set interfaces <interface-name> speed <speed> number-of-sub-ports <sub-ports> statement.

To channelize individual ports on QFX5K-FPC-16C line card, see Table 1.

Table 30 summarizes the supported port speeds on QFX5K-FPC-16C Line Card.

Table 30: Port Speed for QFX5K-FPC-16C Line Card

Port Number

Port Speed Supported

 Default Speed

Channelized ports at Port 0, Port 4, Port 8, and Port 12

100-Gigabit Ethernet

40-GbE

4x10-GbE

4x25-GbE

All active ports operate in 100 Gigabit Ethernet mode.

When channelization is done in ports (0, 4, 8, and 12) then the next three consecutive non-channelized ports (1, 2, 3, 5, 6, 7, 9, 10, 11, 13, 14, and 15) need to be configured as unused ports. To do the same refer to Example for channelization configuration to configure a port as unused.

100-GbE

40-GbE

See Interface Naming Conventions for channelized and non-channelized interface naming formats.

Table 31 describes the naming formats for the QSFP28 ports (0, 4, 8, and 12) in channelized mode.

Table 31: Channelized Naming Formats for QSFP28 ports

Interfaces

Channelized Interfaces Naming Formats

4x10-GbE Interfaces

For port 0, interface naming is et-5/0/0:[0-3]

For port 4, interface naming is et-5/0/4:[0-3]

4x25-GbE Interfaces

For port 8, interface naming is et-5/0/8:[0-3]

For port 12, interface naming is et-5/0/12:[0-3]

Table 32 describes the naming formats for the QSFP28 ports in non-channelized mode.

Table 32: Non-channelized Naming Formats for QSFP ports

Interfaces

Non-Channelized Interfaces Naming Formats

100-Gigabit Ethernet Interfaces

et-5/0/1

et-5/0/2

et-5/0/3

et-5/0/5

et-5/0/6

et-5/0/7

40-Gigabit Ethernet Interfaces

et-5/0/9

et-5/0/10

et-5/0/11

et-5/0/12

et-5/0/13

Port Speed on QFX5K-FPC-4CD Line Card

The QFX5K-FPC-4CD line card contains a total of 4 (QSFP56-DD) ports.

You can configure 400 G, 100 G, or 40 G speeds in QFX5K-FPC-4CD line card.

You can channelize the QSFP56-DD ports to four 100-Gigabit Ethernet interfaces, four 25-Gigabit Ethernet interfaces, or four 10-Gigabit Ethernet interfaces speeds. Default speed is 400 G. All the 4 ports can work in any speed or mode.

Table 33 summarizes the supported port speeds on QFX5K-FPC-4CD Line Card.

Table 33: Port Speed for QFX5K-FPC-4CD Line Card

Port Number

Default Speed

Ports (0, 1, 2, and 3)

400-Gigabit Ethernet

4x100-GbE

100-Gigabit Ethernet

40-Gigabit Ethernet

4x10-GbE

4x25-GbE

400 Gbps mode.

In QFX5K-FPC-4CD line card, you can commit the configurations and unused port configuration is not required to channelize the ports.

Example for channelization configuration

  1. Configure the speed on the desired port (et-0/0/y) as 400-Gbps or 4x100-Gbps or 100-Gbps or 40-Gbps and commit the configuration.

Alarm and FEC Configuration on QFX5K-FPC-20Y, QFX5K-FPC-16C, and QFX5K-FPC-4CD Line Cards

An alarm is raised in the following cases:

  • Optics does not support configured speed: When there is a mismatch between the transceiver inserted into a port and the speed configured on the port.
  • Invalid port speed configuration: when you attempt to configure an invalid or unsupported speed for any port in the switch. In this case, the port falls back to the default speed.

Enabling FEC (Forward Error Correction) for an interface depends on the port speed, SERDES lane speed, and the optics type. By default, the Junos OS and Junos OS Evolved software enables the FEC for an interface based on these factors.

Table 34 summarizes the default FEC configuration for the various port speeds of QFX5K-FPC-20Y, QFX5K-FPC-16C, QFX5K-FPC-4CD line cards.

Table 34: Default FEC Configuration for the Various Port Speeds of QFX5K-FPC-20Y, QFX5K-FPC-16C and QFX5K-FPC-4CD Line Cards
Port Speed SERDES Lanes Default FEC Configuration FEC Enable or Disable

10-Gigabit Ethernet

10-Gbps

None

FEC is usually not required for 10-Gbps SERDES lanes.

25-Gigabit Ethernet

25-Gbps

KR FEC74 for DAC

IEEE 802.3bj Clause 91, RS(528, 514)

FEC is enabled by default based on the optics type.

RS-FEC91 for optics

40-Gigabit Ethernet

4x10-Gigabit Ethernet

None

FEC is usually not required for 10-Gbps SERDES lanes.

100-Gigabit Ethernet

4x25-Gigabit Ethernet

RS-FEC91 KR

IEEE 802.3bj Clause 91, RS(528, 514)

FEC is enabled by default based on the optics type.

The default FEC configuration can be overridden using set interfaces <interface-name> ether-options fec <fec74| fec91 | none> statement.