Juniper QFX5100, Hardware Manual

Page: 35 / 256

“Interface Specifications for SFP, SFP+, and QSFP+ Transceivers for the QFX Series” on
page 61
and “Interface Specifications for SFP+ DAC Cables for the QFX Series” on page 73 .
All 48 of these ports can be used for SFP+ transceivers or SFP+ direct attach copper
(DAC) cables. You can use 1-Gigabit Ethernet SFP+, 10-Gigabit Ethernet SFP+ transceivers
and SFP+ direct attach copper cables in any access port.
The remaining 24 logical ports are available for six 40 GbE ports (
48
through
53
) that
support up to four quad small-form factor pluggable plus (QSFP+) transceivers or QSFP+.
Each QSFP+ socket can operate either as a single 40 Gbps port or as a set of 4
independent 10 Ggps ports using QSFP+ breakout cables. The 40 GbE ports can be
configured as either access ports or as uplinks. See
“Interface Specifications for QSFP+
DAC Breakout Cables for the QFX Series” on page 79 .
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 switch can occur. We recommend either using the top port row
exclusively, or bottom port row exclusively, for copper transceivers.
To connect a QFX5100-48S switch as a node device in a QFabric system, you need:
• Four QSFP+ uplink ports on each QFX5100-48S Node device to connect to the data
plane network through the QFX3008-I Interconnect devices.
•
The two remaining QSFP+ uplink ports on each QFX5100-48S Node device connect
to the data plane network through the QFX3008-I Interconnect devices. See
“Interface
Specifications for SFP, SFP+, and QSFP+ Transceivers for the QFX Series” on page 61 .
To connect a QFX5100-48S switch as a member in a QFX Virtual Chassis, you need a
pair of dedicated ports and cables that 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 a upstream and downstream member. QFX5100-48S switches are
recommended in the master, backup, or linecard role. When mixed with QFX3500 or
QFX3600 devices, configure the QFX5100-48S in the master and backup roles. See
Connecting QFX Series Switches in a Virtual Chassis for cabling diagrams.
To connect a QFX5100-48S switch as a spine or leaf device in a Virtual Chassis Fabric
(VCF), you need a pair of dedicated ports and cables that link each spine device and leaf
device in the VCF. All spine devices have at least one direct VCP connection to each leaf
device in the VCF. See
“Connecting a QFX5100 Switch in a Virtual Chassis Fabric” on
page 183 for a cabling diagram.
BEST PRACTICE: Use the QFX5100-48S switch as leaf devices and
QFX5100-24Q as spine devices. By using the QFX5100-24Q as spine devices
in a maximum configuration of twenty leaf devices and four spine devices,
all members can be connected to the spine using QSFP+ ports.
Figure 9 on page 18 shows the port panel of a QFX5100-48S switch.
17 Copyright © 2014, Juniper Networks, Inc.
Chapter 2: Chassis