Qsfp28 Direct Attach Copper Cables For Qfx5120 Switches; Cable Specifications - Juniper QFX5120 Series Hardware Manual

QSFP28 Direct Attach Copper Cables for QFX5120 Switches

IN THIS SECTION

Cable Specifications | 76

Section | ?
Quad small form-factor pluggable (QSFP28) direct attach copper (DAC) cables are suitable for in-rack
connections between QSFP28 ports on QFX5120 switches. They are suitable for short distances, making
them ideal for highly cost-effective networking connectivity within a rack and between adjacent racks.
NOTE: We recommend that you use only QSFP28 DAC cables purchased from Juniper Networks
with your Juniper Networks device.
CAUTION: If you face a problem running a Juniper Networks device that uses a third-party
optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you
diagnose the source of the problem. Your JTAC engineer might recommend that you
check the third-party optic or cable and potentially replace it with an equivalent Juniper
Networks optic or cable that is qualified for the device.
Cable Specifications
QSFP28 passive DAC cables are hot-removable and hot-insertable. A cable consists of a cable assembly
that connects directly into two QSFP28 modules, one at each end of the cable. The cables use integrated
duplex serial data links for bidirectional communication and are designed for data rates up to 100 Gbps.
Passive DAC cables have no signal amplification built into the cable assembly. See
Figure 38: QSFP28 Direct Attach Copper Cables
Figure 38 on page 76.
76