Juniper PTX10008 Hardware Manual page 138

Each QSFP28 port (60 and 64) controls a port group and can be configured to support:
100-Gigabit Ethernet using QSFP28 optical transceivers. The interface speeds are configured by port
group. When a QSFP28 transceiver is inserted into the one of the QSFP28 ports marked with a fine
black line above the port (60 or 64) and the port is configured for 100-Gigabit Ethernet, the two adjacent
ports are disabled and the QSFP28 port is enabled for 100-Gigabit Ethernet. When port 60 is configured
for 100-Gbps, ports 61 and 62 are disabled; when port 64 is configured for 100-Gbps, ports 63 and 65
are disabled.
40-Gigabit Ethernet using QSFP+ optical transceivers. The default speed is 10 Gbps.
10-Gigabit Ethernet using breakout cabling and attached optical transceivers. When configured for
channelization, the system converts the 40-Gigabit Ethernet port into 4 independent 10-Gigabit Ethernet
ports. Use the set chassis fpc fpc-slot-number pic pic-slot-number port port-number speed speed command
to change the port speed.
Each QSFP+ port (61, 62, 63, and 65 is part of a port group and is controlled either by the associated
QSFP28 port (60 or 64). A QSFP28 port operating at 40-Gpbs speeds, the QSFP+ ports can be configured
to support:
40-Gigabit Ethernet using QSFP+ optical transceivers. The default speed is 10 Gbps.
10-Gigabit Ethernet using breakout cables with attached optical transceivers. When configured for
channelization, the system converts the 40-Gigabit Ethernet port into 4 independent 10-Gigabit Ethernet
ports. Use the set chassis fpc fpc-slot-number pic pic-slot-number port port-number speed speed command
to change the port speed.
Each SFP+ port (0 through 59) can be configured to support 10-Gigabit Ethernet using SFP+ optical
transceivers. The default speed is 10 Gbps.
Copper SFP transceivers are only supported on the bottom two SFP+ rows. Because copper SFP transceivers
(1000BASE-T) are physically larger than optical SFP transceivers (1000BASE-X), stacking copper SFP
transceivers in all three rows causes internal damage to the line card. Optical SFP transceivers can be
stacked and used in all SFP+ ports 0 through 59.
Any of the 66 ports 0 through 65 can be configured as either uplink or access ports. The ports are enabled
by default, and the default configuration adds the ports to the default VLAN.
Port Groups
The six combination ports of QSFP28 and QSFP+ can operate either as six independent 40-Gigabit Ethernet
ports or as two port groups. The first port group is controlled by QSFP28 port 60 and administratively
bundled with QSFP+ ports 61 and 62. The second port group is controlled by QSFP28 port 63 and
administratively bundled with QSFP+ ports 64 and 65. To enable the port group, insert a 100-Gigabit
Ethernet transceiver into the QSFP28 port and configure a port for 100-Gbps. Junos OS enables the
QSFP28 port at 100-Gbps speed and disables the two QSFP+ ports bundled in the port group.
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