Juniper QFabric QFX3000-G Hardware Documentation page 764

QFX3000-G QFabric System Hardware Documentation
Configuring the Port Type on QFX3600 Node Devices
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The QFX3600 Node device provides 16 40-Gbps QSFP+ ports. By default, four ports
(labeled through ) operate as 40-gigabit data plane (fte) uplink ports for uplink
Q0 Q3
connections between your Node device and your Interconnect devices. Twelve ports
(labeled through ) operate as 10-Gigabit Ethernet (xe) ports to support 48
Q4 Q15
10-Gigabit Ethernet interfaces for connections to either endpoint systems or external
networks. Optionally, you can choose to configure ports Q0 through Q7 to operate as
40-gigabit data plane uplink ports, and ports Q2 through Q15 to operate as 10-Gigabit
Ethernet or 40-Gigabit Ethernet (xle) ports.
NOTE: You can use QSFP+ to four SFP+ breakout cables or QSFP+
transceivers with fiber breakout cables to connect the 10-Gigabit Ethernet
ports to other devices.
NOTE: When you delete the port type configuration for an individual port or
a block of ports, the ports return to operating in their default port type. For
example, when you delete the 40-Gigabit Ethernet (xle) port configuration
for port Q4, the port returns to operating as a 10-Gigabit Ethernet (xe) port.
NOTE: When the 40-Gigabit Ethernet (xle) ports of a QFX3600 Node device
carry traffic at the full line rate, loss of untagged Layer 2 or Layer 3 traffic
going across the fabric might occur, as well as increased latency on the Node
device. Such effects result from the addition of a 4-byte header to packets
traversing the uplink ports on the Node device. The percentage of traffic loss
depends on the size of the packets: the greater the packet size, the lower the
traffic loss and vice versa. This problem does not affect tagged traffic.
This topic explains how to configure the port type on QFX3600 Node devices.
Before you configure the port type on QFX3600 Node devices:
Make sure your QFabric system is operational.
Issue the
show fabric administration inventory node-groups
existing Node groups and the Node devices in each Node group.
NOTE:
Only ports Q0 through Q7 can be configured to operate as 40-gigabit data
plane (fte) uplink ports.
Only ports Q2 through Q15 can be configured to operate as 10-Gigabit
Ethernet (xe) or 40-Gigabit Ethernet (xle) ports.
command to display the
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