Cable Specifications; Standards Supported By These Cables - Juniper QFX5120 Series Hardware Manual

CAUTION:
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

QFX5120 switches support SFP28 passive DAC cables. The passive Twinax cable is a straight cable with
no active electronic components. QFX5120 switches support 1 m, 3 m, and 5 m long SFP28 passive DAC
cables. See Figure 37 on page
Figure 37: SFP28 Direct Attach Copper Cables for QFX5120 Switches
The cables are hot-removable and hot-insertable: You can remove and replace them without powering
off the switch or disrupting switch functions. A cable comprises a low-voltage cable assembly that connects
directly into two 25-Gigabit Ethernet ports, one at each end of the cable. The cables use high-performance
integrated duplex serial data links for bidirectional communication and are designed for data rates of up
to 25 Gbps.

Standards Supported by These Cables

The cables comply with the following standards:
SFP mechanical standard SFF-8431— see ftp://ftp.seagate.com/sff/SFF-8431.PDF.
Electrical interface standard SFF-8432— see ftp://ftp.seagate.com/sff/SFF-8432.PDF.
SFP+ Multi-Source Alliance (MSA) standards
If you face a problem running a Juniper Networks device that uses a third-party
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