All 32 QSFP+ ports on the switch are configured for 40-Gigabit Ethernet only. All ports
are supported as access or uplink ports, but cannot be channelized.
When a 100-Gbps transceiver is inserted into QSFP28 ports 28 through 31, the port
forms a post group and disables two QSFP+ ports. See Table 5 on page 14.
Table 5: Default Behavior of 100 Gigabit Ethernet Ports
Disables 40 Gigabit Ethernet QSFP+ Ports100 Gigabit Ethernet QSFP28 Ports
Port 20 and 21Port 29
Port 22 and 23Port 28
Port 24 and 25Port 30
Port 26 and 27Port 31
Channelization is supported on ports 0 through 23.
CAUTION: As shown in Table 5 on page 14, ports 20 through 23 might not
be availablefor channelizationif youhavepopulated the 100 Gbps QSFP28
ports.
•
Flexi-pic mode
•
Ports 0 through 19 of the switch are configured for 40-Gigabit Ethernet and can be
channelized to 4 independent 10-Gigabit Ethernet ports.
•
Ports 20 though 27 are disabled.
•
Ports 28 through 31 are configured as 100-Gigabit Ethernet.
•
Non-oversubscribed mode (Junos OS Release 17.3R1 and later)
Ports 0 through 23 only can be channelized. The remaining ports are disabled. Use this
mode to achieve 960 Gbps speeds for either 24 ports of 40 Gigabit Ethernet or 96
ports of 10 Gigabit Ethernet.
CAUTION: In release Junos OS Release 17.2R1, changing the system mode
causes the FPC to reboot. Because there can be a slight loss of data while
the FPC reboots, we recommend that you only configure the changes during
a maintenance window for this release.
CAUTION: Take care when changing the channelization mode from Flexi-pic
to default. If you have existing ports that are channelized in Flexi-pic mode,
remove the channelization from the interface before changing the system
mode. Changing the Flexi-pic mode to the default mode with channelized
Copyright © 2017, Juniper Networks, Inc.14
QFX5110 Switch Hardware Guide
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