Installation Instructions

Figure 2: Passive copper BOC
DAC support
The following sections detail additional support information on DACs.
SFP+ DAC
The VSP switches operate in forgiving mode for direct attach cables (DAC) when using third party
direct attach cables. Extreme Networks does not provide support for operational issues related to
these DACs, but they will operate and the port link will come up.
Note:
Although VSP 8000 Series and VSP 7200 Series support 10 Gigabit and 40 Gigabit DAC cables
in forgiving mode, in releases earlier than VOSS 4.2.1, the command output for show
pluggable-optical-modules basic displays the corresponding vendor name rather than
leaving the vendor name field blank.
QSFP+ to QSFP+ 40 Gigabit DAC
The QSFP+ to QSFP+ 40 Gigabit direct attach cable (DAC) assembly directly connects two QSFP+
ports. For more information, see the IEEE 802.3ba 40GBASE-CR4 cable assembly specification
standard.
QSFP28 to QSFP28 100 Gigabit DAC
The QSFP28 to QSFP28 100 Gigabit direct attach cable (DAC) assembly directly connects two
QSFP28 ports. For more information, see IEEE 802.3–2012 cable assembly specification standard.
Supported transceiver, BOCs and DACs
May 2018 Installing Transceivers and Optical Components on VOSS 18