
2 Line Unit (LU1)
2.3
Operation
The function of LU1 is to perform layer 2 and layer 3 packet switching, packet forwarding, packet
fi
ltering and traf
fi
c management functions. The CPU subsystem is used to control LU1 functionality.
The
fi
gure below presents the LU1 functional block diagram.
Fig. 4 LU1 Block Diagram
2.3.1
CPU Subsystem
The CPU subsystem uses a high performance 64-bit RISC processor with the following memories:
• DDR3 DRAM
• Application FLASH (SD-memory card)
• Boot FLASH
The application software is stored in FLASH memory. Thus, it is possible to update the software
on the
fi
eld when new software feature packs become available. Similarly, the card and interface
parameters are stored in FLASH, so those are restored after reset.
8600 Smart Routers
76.8670-40128B
8665 Smart Router FP7.0 Reference Manual
© 2015 Coriant.
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