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Port Panel of a QFX5100-24Q Device

The port panel of the QFX5100-24Q device consists of 24 quad small-form factor pluggable plus (QSFP+) ports. Each QSFP+ socket can be configured to support 40 GbE or as a set of 4 independent 10 GbE ports using breakout cables (channelization mode). In standalone mode, any of the 24 ports 0 through 23 can be configured as either uplink or access ports. The QFX5100-24Q device has two module bays for the optional expansion modules, QFX-EM-4Q or EX4600-EM-8F. The QFX-EM-4Q, can add a total of 8 additional QSFP+ ports to the chassis and the EX4600-EM-8F can provide 8 additional 10-Gigabit Ethernet Enhanced Small Form-Factor Pluggable (SFP+) ports. The QFX-EM-4Q ports can also be configured as either access ports or as uplinks, but only ports 0 and 2 can be channelized using port mode. Figure 1 shows the port panel of the QFX5100-24Q device.

Figure 1: QFX5100-24Q Device Port PanelQFX5100-24Q Device Port Panel
  1

Electrostatic Discharge (ESD) terminal

  3

Expansion module bays with cover panels (2)

  2

QSFP+ access interface or uplink ports (24)

 

Switch Ports

The QFX5100-24Q device ports, (0 through 23) support:

  • 40 Gbps QSFP+ transceivers

  • QSFP+ to QSFP+ direct attach copper (DAC) cables

  • QSFP+ to SFP+ direct attach copper break out (DACBO) cables

  • QSFP+ to QSFP+ active optical cables (AOC)

  • QSFP+ to SFP+ active optical breakout cable (AOCBO)

  • Access ports

    You can use 40-Gigabit Ethernet QSFP+ transceivers and QSFP+ direct attach copper cables in any downstream port. See Determining Interface Support for the QFX5100 Device.

  • Uplink ports

    You can configure up to 4 of the 40 GbE ports as uplinks. Each additional QFX-EM-4Q, Expansion Module adds the switch uplink capacity by 2 for a total of 8 uplinks.

    To connect a QFX5100-24Q switch as a Node device in a QFabric system, you need:

    • Four QSFP+ uplink ports on each QFX5100-24Q Node device to connect to the data plane network through the QFX3008-I or QFX5100-24Q Interconnect devices.

    • Two additional QSFP+ uplink ports on each QFX5100-24Q Node device connect to the data plane network through the QFX3008-I or QFX5100-24Q Interconnect devices. .

QFabric Systems

The QFX5100-24Q operates as a Node device in both the QFX3000-G and QFX3000-M QFabric systems. Additionally, the QFX5100-24Q can be configured as an Interconnect Device in QFX3000-M QFabric systems allowing a maximum of 16 Node devices. The QFX5100-24Q may not be mixed with QFX3600-I Interconnect devices in the same QFabric system.

When operating as a Node device, ports 0 through 7 are default FTE ports; ports 8 through 15 can be configured as either uplink (FTE) or access ports (XLE). In the port range 8 through 23, only 12 ports can be channelized when the 2 QFX-EM-4Q are installed.

Note:

The EX4600-EM-8S expansion module is not supported on the QFX5100-24Q device in a QFabric system.

Channelizing Interfaces (Non-QFabric)

When fully populated with 2 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. The following system modes are available on the QFX5100-24Q device:

  • Default mode

    All 24 QSFP+ ports on the switch (PIC 0) are channelized by default (96 ports). With QFX-EM-4Q Expansion Modules (PIC 1) and (PIC 2), the QSFP+ ports are supported for access or uplink ports, but cannot be channelized. Ports are over-subscribed In this mode and could be subject to packet-loss. You can have one of two port combinations: 32 40-Gbps QSFP+ ports, or 96 10-Gigabit Ethernet ports plus 8 40-Gbps QSFP+ ports.

  • 104 port mode

    All 24 QSFP+ ports on the switch (PIC 0) are channelized (96 ports). Two ports on QFX-EM-4Q Expansion Module (PIC 1) are also channelized (8 additional). In this mode, ports 0 and 2 are channelized by default and ports 1 and 3 are disabled. If additional QSFP+ ports are detected in an expansion module (PIC 2), those ports are ignored.

  • Flexi-pic mode

    Ports 0 through 3 of the switch cannot be channelized; ports 4 through 24 are channelized by default (80 ports). With QFX-EM-4Q Expansion Modules (PIC 1) and (PIC 2), the QSFP+ ports are supported for access or uplink ports, but cannot be channelized. With EX4600-EM-8F Expansion Modules installed (PIC 1) and (PIC 2), the 16 SFP+ ports of SFP are recognized for a total of 96 logical ports.

  • Non-oversubscribed mode

    All 24 QSFP+ ports on the switch (PIC 0) are channelized (96 ports). Expansion modules on PIC 1 and PIC 2 are not supported and cannot be channelized. There is no packet loss for packets of any size in this mode.

Virtual Chassis and Virtual Chassis Fabric

The QFX5100-24Q device operates as a standalone switch, a member of a QFX Virtual Chassis, or as a spine or leaf device in a QFX5100 Virtual Chassis Fabric (VCF). QFX Virtual Chassis support up to 10 members. QFX5100 VCF supports 20 QFX5100 and EX4300 devices, of which 4 QFX5100 devices can be configured as spines.

To connect a QFX5100-24Q device as a member in a QFX Virtual Chassis, you need to cable a pair of ports to link each member in the Virtual Chassis into a ring topology. Each member in the ring has at least one direct Virtual Chassis port (VCP) connection to each directly connected member. QFX5100-24Q devices are recommended in the primary, backup, or line card role. When mixed with QFX3500 or QFX3600 devices, configure the QFX5100-24Q device in the primary and backup roles. See Connecting QFX Series and EX Series Switches in a QFX Virtual Chassis for cabling diagrams. The Virtual Chassis feature is not applicable to QFX devices in a QFabric.

To connect a QFX5100-24Q device as a spine or leaf device in a QFX5100 VCF, you need to cable a set of ports as VCP connections that link each spine device and leaf device. All spine devices have at least one direct VCP connection to each leaf device in the VCF. Non-channelized DAC cables can be configured as VCP connections. See Connecting a QFX5100 Device in a Virtual Chassis Fabric for a cabling diagram.

Best Practice:

Whenever possible use the QFX5100-24Q device as a spine device. By using the QFX5100-24Q device in a maximum configuration of 20 total devices, four QFX5100-24Q devices may be used as spine devices. All members can be connected to the spine using QSFP+ ports.

As of Junos OS release 17.3R1, you can also connect a QFX5100-24Q as a leaf device in a QFX5110 VCF or as a member in a QFX5110 Virtual Chassis.

Port LEDs

The bi-color LEDs labeled Link/Activity LED in Figure 2 indicate link activity or faults.

Figure 2: LEDs on the QSFP+ Uplink PortsLEDs on the QSFP+ Uplink Ports

Table 1 describes the SFP+ access port LEDs.

Table 1: Port LEDs on a QFX5100-24Q Switch

Color

State

Description

Unlit

Off

The port is administratively disabled, there is no power, or there is a fault.

Note:

When configured for channelized 10-Gigabit Ethernet, the LED remains unlit only if all four of the 10-Gigabit Ethernet SFP+ breakout links are down.

Green

On steadily

A link is established, but there is no link activity.

Note:

When configured for channelized 10-Gigabit Ethernet, the LED is lit green when at least one of the four 10-Gigabit Ethernet SFP+ breakout links is established.

Blinking

A link is established, and there is link activity.

Note:

When configured for channelized 10-Gigabit Ethernet, the LED is lit green when at least one of the four 10-Gigabit Ethernet SFP+ breakout links is established.

Amber

Blinking

All four LEDs blink to indicate the beacon function was enabled on the port.