Juniper QFX3000-G QFabric, Deployment Manual, Page: 295 / 652

CHAPTER 15
Cabling the Data Plane for the
QFX3000-G QFabric System
• Connecting a QFX3600 Node Device to a QFX3008-I Interconnect Device on page 269
• Connecting a QFX3500 Node Device to a QFX3008-I Interconnect Device on page 271
Connecting a QFX3600 Node Device to a QFX3008-I Interconnect Device
Supported Platforms
QFX3000-G
To form the data plane in a QFX3000-G QFabric system, you connect the QSFP+ uplink
ports (labeled
Q0
through
Q7
) on the QFX3600 Node device to the QSFP+ ports on the
16-port QSFP+ front cards in a QFX3008-I Interconnect device.
The number of uplink connections from your Node device to your Interconnect devices
determines the oversubscription ratio on the Node device (see
“Understanding Port
Oversubscription on Node Devices” on page 29 ).
NOTE: By default, four ports (labeled Q0 through Q3 ) are configured for
40-Gbps uplink connections between your QFX3600 Node device and your
Interconnect device. Optionally, you can choose to configure the first eight
ports (labeled
Q0
through
Q7
) for the uplink connections (see “Configuring
the Port Type on QFX3600 Node Devices” on page 392 ).
CAUTION: For redundancy, each QFX3600 Node device must be connected
to each QFX3008-I Interconnect device. For example, if you have two
QFX3008-I Interconnect devices, then at least one uplink port on each
QFX3600 Node device must be connected to each QFX3008-I Interconnect
device. If you are connecting four uplink ports to two QFX3008-I Interconnect
devices, we recommend connecting two uplink ports to each Interconnect
device, each to a different front card. If you are connecting eight uplink ports
to two QFX3008-I Interconnect devices, we recommend connecting four
uplink ports to each Interconnect device, each to a different front card.
Before you begin to cable the QFX3000-G QFabric system data plane:
269 Copyright © 2015, Juniper Networks, Inc.