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Figure 31: QFX3500 Device Rear
g050001
QSFP+
uplink
ports
SFP+
access
ports
SFP+
access
ports
The QFX3500 device has an LCD panel that displays the device hostname and the number
of active alarms. See
“Front Panel of a QFX3500 Device” on page 65
. The rear panel has
48 10-Gbps access ports and 4 40-Gbps uplink ports. See
.
SFP+ 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
Specifications for SFP+ Transceivers for QFX3500 Device Access Ports” on page 108
and
“Interface Specifications for SFP+ DAC Cables for QFX3500 Device Access Ports” on
page 117
.
•
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.
61
Copyright © 2012, Juniper Networks, Inc.
Chapter 4: QFX3500 Overview
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