• Prevention of Electrostatic Discharge Damage on page 198
• Installing and Removing QFX3500 Device Hardware Components on page 121
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+ directattach copper cables, also known as Twinax cables.
See “Determining Interface Support for the QFX3500 Device” on page 59.
•
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 coppertransceiver. Internal damagetothe access
ports and device can occur. Because of this limitation, a maximum of 18
coppertransceiverscanbe installedin ports 6 through41. 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” on page 59. 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
Copyright © 2017, Juniper Networks, Inc.20
QFX3500 Device Hardware Documentation
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