Network Ports; 100-Gbps Operation And Configuration - Juniper QFX10002 Hardware Manual

Copyright © 2019, Juniper Networks, Inc.
10-Gigabit Ethernet using DAC breakout cables (DACBO). When configured for
channelization, a breakout cable converts the 40-Gigabit Ethernet port into 4
independent 10-Gigabit Ethernet ports. The two adjacent QSFP+ ports in the port
group are also configured for channelization at the same time. You cannot configure
a single port for channelization.

Network Ports

Each of the 12 QSFP28 ports support:
100-Gigabit Ethernet QSFP28 transceivers
100-Gigabit Ethernet active optical cables (AOCs)
40-Gigabit Ethernet QSFP+ transceivers
40-Gigabit Ethernet QSFP+ DAC cables
40-Gigabit Ethernet QSFP+ to 10-Gigabit Ethernet SFP+ direct attach copper breakout
(DACBO) cables
The remaining ports support:
40-Gigabit Ethernet QSFP+ transceivers
40-Gigabit Ethernet QSFP+ DAC cables
40-Gigabit Ethernet QSFP+ to 10-Gigabit Ethernet SFP+ DACBO cables
10-Gigabit Ethernet SFP+ transceivers
10-Gigabit Ethernet DAC cables

100-Gbps Operation and Configuration

Every second and sixth port in a 6XQSFP cage on a QFX10002 supports 100-Gigabit
Ethernet using QSFP28 transceivers. These 100-Gigabit Ethernet ports work either as
100-Gigabit Ethernet or as 40-Gigabit Ethernet, but are recognized as 40-Gigabit Ethernet
by default. See Figure 7 on page 30
100-Gigabit Ethernet are designated by a fine black line underneath the port. See
Figure 8 on page 30. When a 40-Gigabit Ethernet transceiver is inserted into a 100-Gigabit
Ethernet port, the port recognizes the 40-Gigabit Ethernet port speed. However, when
an 100-Gigabit Ethernet transceiver is inserted into the port, the transceiver is not
automatically recognized and is not seen in the output of the
command. To enable 100-Gigabit Ethernet on the marked ports, use the
command. For example, to enable port 11 for 100 Gbps speeds:
[edit]
user@switch#
set chassis fpc 0 pic 0 port 11 speed 100g
The port then recognizes the 100-Gigabit Ethernet speed and disables two adjacent
40-Gigabit Ethernet ports. See
for a close up view of a 6XQSFP+ cage. The
Figure 9 on page 30.
Chapter 1: Overview
show chassis hardware
set chassis fpc
29