Parameter
Value
Weight
0.7 kg
3.8 Switching Network
This chapter describes the features and functions of a switching network.
3.8.1 Introduction to the Switching Network System
This section describes the principle of the SFU.
The E8000E-X8 has three SFUs. Two SFUs are integrated on two SRUAs. Another SFU is
separate.
The switching network responsible for switching data between LPUs is a key component of the
E8000E-X8. The E8000E-X8 uses the switching chips developed by Huawei and Memory-
Crossbar-Memory (M-C-M) to provide a three-level switching mode. Level-1 and level-3
switching adopts the shared-memory model and is performed on LPUs; level-2 switching adopts
the Crossbar model and is performed on an SFU.
shows the switching network of
the E8000E-X8.
Figure 3-14
Switching network of the E8000E-X8
The level-1 switching chip on one LPU is fully connected to all the level-2 switching chips on
the SFUs. The level-2 switching chips on the SFUs are also fully connected to the level-3
switching chip on another LPU. In addition, the level-2 crossbar switching chips work in load
balancing mode across multiple switching planes. The entire switching network is unblocked.
The following describes how data packets are transmitted across the switching network.
1.
Data packets enter an LPU through physical interfaces and are fragmented into cells of a
fixed length. These cells are then sent to the level-1 switching chips. After being buffered
and scheduled, the cells enter the crossbar switching chips on the SFU. The level-1
HUAWEI Eudemon8000E Firewall
Hardware Description
3 E8000E-X8 Chassis Overview
Issue 01 (2012-11-07)
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