Connecting a QFX3500 Node Device to a QFX3008-I Interconnect Device
Before you begin to cable the QFX3000-G QFabric system data plane:
Review The Hardware Compatibility Tool 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 The Hardware Compatibility Tool).
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.
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.
To connect a QFX3500 Node device to a QFX3008-I Interconnect device:
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.