Juniper QFX3000-G QFabric, Руководство по развертыванию, Страница: 297 / 652

Connecting a QFX3500 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 Q3 ) on the QFX3500 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 ).
CAUTION: For redundancy, each QFX3500 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
QFX3500 Node device must be connected to each QFX3008-I Interconnect
device. If you have four QFX3008-I Interconnect devices, then each uplink
port should be connected to a different QFX3008-I Interconnect device. If
you are connecting all 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.
Before you begin to cable the QFX3000-G QFabric system data plane:
• Review “Interface Specifications for SFP, SFP+, and QSFP+ Transceivers for the QFX
Series” on page 104 for information about the optical interface characteristics.
•
Ensure that you have taken the necessary precautions for safe handling of lasers (see
Laser and LED Safety Guidelines and Warnings for the QFX Series ).
• Ensure you have installed QSFP+ transceivers in each port you are using. See Installing
a Transceiver in a QFX Series Device .
•
Ensure that you have appropriate fiber-optic cables (see “Interface Specifications for
SFP, SFP+, and QSFP+ Transceivers for the QFX Series” on page 104 ).
To connect a QFX3500 Node device to a QFX3008-I Interconnect device:
WARNING: Do not look directly into a fiber-optic transceiver or into the ends
of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected
to transceivers emit laser light that can damage your eyes.
1.
If the fiber-optic cable connector is covered by a rubber safety cap, remove the cap.
Save the cap.
2.
Remove the rubber safety cap from the QSFP+ optical transceiver on the QFX3500
Node device. Save the cap.
3.
Insert the cable connector into the optical transceiver.
271 Copyright © 2015, Juniper Networks, Inc.
Chapter 15: Cabling the Data Plane for the QFX3000-G QFabric System