3.4 Data Plane
3.4.1 Introduction to the Data Plane
NPUs are key parts on the CX600-X2-M16 and are responsible for network processing and data
exchange between PICs and NPUs.
The procedure for data processing is as follows:
1.
The IP packets sent from PICs and NPU converge at a convergence module.
2.
The NP processes the IP packets.
3.
The TM module performs traffic management on the IP packets.
Figure 3-11
Data plane architecture of the CX600-X2-M16
B
ac
kp
la
ne
P
H
Y
SFP
RJ45
INTERFACE
CONVERSION
MODULE
P
H
Y
SFP
RJ45
INTERFACE
CONVERSION
MODULE
OVER
SUBSCRI
BED
NP
TM
NPU
OVER
SUBSCRI
BED
NP
TM
NPU
3.4.2 Introduction to the NPU-50
NOTE
NPU-50 must not be installed in an outdoor cabinet.
The NPU-50 has a 50-Gbit/s forwarding capability in each direction, and all subcards exchange
data through the NPU-50.
You can install two NPUs on the chassis of the CX600-X2-M16. The two NPUs can work in 1
+1 or 1:1 mode. In 1+1 mode, the NPU-50 is connected to the eight PICs. In 1:1 mode, the
NPU-120-E is connected to the sixteen PICs.
The NPU-50 consists of the following planes:
l
Control and management plane
HUAWEI CX600-X1-M/CX600-X2-M Series Metro
Services Platform
Hardware Description
3 CX600-X2-M16 Hardware Description
Issue 03 (2014-04-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
75