Chapter 1 Overview
Confidential and Proprietary Information of ZTE CORPORATION 9
The Ethernet service transparent transmission function
supported in the ZXA10 S300 means that any data frame
from an Ethernet interface need no Layer 2 switching and is
mapped to SDH Virtual Containers (VCs) immediately after
protocol encapsulation and rate adaptation. Then, these
frames are transmitted point-to-point via SDH nodes. The
functional block model is shown in
Figure 3.
FIGURE 3 − ETHERNET SERVICE TRANSPARENT TRANSMISSION FUNCTION
MODEL OF THE ZXA10 S300
Ethernet interface
GFP/
LAPS/
HDLC
Assembly
STM-N
VC Mapping
Multiplex section
processing
Regenerator section
processing
interface
The ZXA10 S300 has the following Ethernet service
transparent transmission functions:
f Configurable transmission link bandwidth.
f Ensured transparence of Ethernet services, including the
transparent transmission of Ethernet MAC frames and
VLAN tags.
Ethernet Layer 2 switching service
The Layer 2 switching function supported in the ZXA10 S300
refers to data packet switching based on Ethernet link layer
between multiple Ethernet user interfaces and one or more
standalone point-to-point links based on SDH virtual
containers. The functional block model is shown in
Figure 4.
FIGURE 4 − ETHERNET LAYER 2 SWITCHING FUNCTION MODEL OF THE
ZXA10 S300
Ethernet interface
GFP/
LAPS/
HDLC
Assembly
VC Mapping
STM-N
interface
Layer-2 switching
Multiplex section
processing
Regenerator section
processing
The ZXA10 S300 has the following Ethernet Layer 2
switching functions:
f Configurable transmission link bandwidth.
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