Understanding Qsfp-Dd Interfaces And Configurations - Juniper PTX10003-80C Hardware Manual

Figure 6: PTX10003-80C Port Panel
FPC1
FPC0
1 40 optical interfaces with 40 port LEDs
—
As illustrated in Figure 6 on page
logical PICs, and physical optical ports as follows:
FPCs: The PTX10003-80C has two FPCs, numbered 0 and 1 from the bottom up in the chassis.
PICs: Each FPC has two logical PICs, numbered 0 and 1 from left to right.
Ports:: Each PIC controls 10 QSFP-DD optical interfaces, numbered 0 through 9 from left to right.
The 10 QSFP-DD optical interfaces are divided into two groups of five ports.
Each port group is controlled by two Packet Forwarding Engines (PFE).

Understanding QSFP-DD Interfaces and Configurations

Each Juniper Networks 1 Tbps ExpressPlus ASIC contains two logically independent PFEs which can
provide 400 Gbps throughput. Each QSFP-DD port group is controlled by two PFEs with the middle
QSFP-DD interface (port 2 and port 7) being shared by the PFEs.
Any port can be used as a 100-Gigabit Ethernet interface, 40-Gigabit Ethernet interface, or 10-Gigabit
Ethernet interface. You choose the speed by plugging in the appropriate optical transceiver. You can also
channelize the 100 Gbps and 200 Gbps ports to create multiple independent 25 Gbps interfaces. You can
channelize the 40 Gbps ports to create multiple independent 10 Gbps ports. See Channelizing Interfaces
on PTX10003 Routers for more details.
Given the design of the Juniper Networks ExpressPlus ASIC and chassis level thermal considerations, there
are certain limitations for some QSFP-DD interfaces and configurations. Each QSFP-DD port group can
be configured to achieve the maximum 1 Tbps throughput with the following limitations:
PIC 0
28, the interfaces for the PTX10003-80C are divided into logical FPCs,
0 1
B
2 3
PIC 1
28