Juniper QFX5220, Hardware Manual

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Table 5: QFX5220-32CD Port Speed Autodectection
Sets Default Speed to Transceiver, DAC, AOC, DACBO, or AOCBO
400 Gbps, link up QSFP-DD
400 Gbps, link down QSFP28
400 Gbps, link down QSFP
10 Gbps, link up SFP+ (ports 32 and 33 only) and management port
NOTE: The QFX5220-32CD does not support autonegotiation between devices.
If a port already has a speed configured, you can manually configure the ports. To set the speed, use the
set chassis fpc FPC number pic pic number port port number speed 25|40|100|200|400 configuration mode
CLI command. For example, to set port 2 to 100 Gbps:
[edit chassis]
user@host#
set chassis fpc 0 pic 0 port 2 speed 100g
NOTE: On QFX5220-32CD devices, there is a single FPC and PIC, which is always 0.
After you set a port speed, you can channelize the port into 4 independent 25-Gigabit Ethernet interfaces
by configuring the number of subports and speed. You should use the set chassis fpc FPC number pic pic
number port port number number-of-sub-ports 1|2|3|4 command. For example, to configure 100-Gbps
port 4 to four independent 25-Gbps interfaces:
[edit chassis]
user@host#
set chassis fpc 0 pic 0 port 4 speed 25g number-of-sub-ports 4
Be sure to save and commit your changes.
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