Juniper QFX5220, Hardware Manual

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40 Gbps QSFP+ transceivers
•
40 Gbps QSFP+ to 10 Gbps SFP+ DACBO cables (40 Gbps breaks out to 10 Gbps ports)
NOTE: Ports qualified for channelization support 100-Gbps QSFP28 to 25-Gbps SFP28 direct
attach copper break out (DACBO) cables (100-Gbps breaks out to 4 independent 25-Gbps.
The 10-Gbps network ports 128 (et-0/0/128) and 129 (et-0/0/129) support SFP+ transceivers.
Port Configurations
The QFX5220-128C has 128 QSFP28 ports and 2 SFP+ ports. You can configure any of these ports in
these combinations:
•
Any of the QSFP28 ports can be configured as 100 Gbps.
•
Any even-numbered QSFP28 port can be configured as 40 Gbps. The system will configure the next
(odd) port as unused.
•
Every fourth port (0, 4, 8...124) can be configured as channelized 4 x 25 Gbps. However before configuring
a port as channelized, the next three ports must be configured as unused.
•
Any SFP+ port can be configured as 10 Gbps or 1 Gbps.
Table 8 on page 34 shows how each QSFP28 port can be configured. You can mix and match speeds as
long as you adhere to the port rules. For example, on the same device you can configure port 0 as 40 Gbps,
ports 2 and 3 as 100 Gbps, and port port as 4 x 25 Gbps. In this example, port 1 and port 5-7 must be
configured as unused.
Table 8: QFX5220-128C Valid 100-Gbps Configurations
Ports Configurable as channelized 4 x 25
Gbps
Ports Configurable as 40
Gbps
Ports
Configurable as
100 Gbps Port
✓ ✓ ✓ 0
Configure as unused Configure as unused
✓
1
Configure as unused ✓ ✓ 2
Configure as unused Configure as unused ✓ 3
✓ ✓ ✓ 4
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