Rear Panel of a QFX3500 Device
The rear panel of the QFX3500 device consists of the following components:
Access ports—The QFX3500 device has 48 access ports (0 through 47) that support small form-factor pluggable plus (SFP+) and small form-factor pluggable (SFP) transceivers, as well as SFP+ direct attach copper cables, also known as Twinax cables. See Determining Interface Support for the QFX3500 Device.
Up to 48 of the access ports can be used for SFP+ transceivers or SFP+ direct attach copper cables. You can use 10-Gigabit Ethernet SFP+ transceivers and SFP+ direct attach copper cables in any access port. You can use 2-Gbps, 4-Gbps, or 8-Gbps Fibre Channel SFP+ transceivers in ports 0 through 5 and ports 42 through 47.
Note:If you use Fibre Channel SFP+ transceivers in ports 0 through 5 or ports 42 through 47, you must configure the entire block of ports as Fibre Channel ports. For example, if you use a Fibre Channel SFP+ transceiver in any of the ports 0 through 5, then ports 0 through 5 must be configured as Fibre Channel ports. If you use a Fibre Channel SFP+ transceiver in any of the ports 42 through 47, then ports 42 through 47 must be configured as Fibre Channel ports. You then cannot use 10-Gigabit Ethernet SFP+ transceivers in these ports.
Up to 36 of the access ports can be used for SFP transceivers. Gigabit Ethernet SFP transceivers can be used in ports 6 through 41.
CAUTION:Do not place a copper transceiver in an access port directly above or below another copper transceiver. Internal damage to the access ports and device can occur. Because of this limitation, a maximum of 18 copper transceivers can be installed in ports 6 through 41. We recommend using only the top row of access ports for copper transceivers.
Uplink ports—The QFX3500 device has four uplink ports (Q0 through Q3) that support up to four QSFP+ DAC breakout cables. See Determining Interface Support for the QFX3500 Device. When the QFX3500 device is used as a Node device in a QFabric system, these uplink ports are used to connect the QFX3500 Node devices to Interconnect devices.
Note:The QSFP+ uplink ports are not supported in Junos OS Release 11.1. The QSFP+ uplink ports are supported in Junos OS Release 11.2 and later.
Access port and uplink port LEDs
Figure 1 shows the rear panel of a QFX3500 device.
