Zte ZXR10 GER - Data Packet Forwarding; Packet Discarding

Chapter 3 Structure and Principles
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 Interface module de-capsulate packets on physical layer and
then encapsulates on data link layer. Data link layer sends
them together with the receiving interface information to the
network processor module.
 Network processor module performs route search and
receive packets for policy processing. This module sends
data link layer packet and receiving interface information to
protocol processor module through local channel over the
CPU.
 Protocol processor module performs protocol processing on
the received packets.
Data Packet Forwarding
Packet forwarding process is as follows
 Interface module de-capsulate the received packets on
physical layer to form packets encapsulated on data link
layer, and then sends them together with the receiving
interface information to the network processor module.
 Network processor module performs route search and
receive packets for policy processing. As a result the packets
are forwarded from local router multiple interfaces.
 It encapsulates layer-3 packets through switching header,
and then sends the switching packets to the switching
network via fast switching channel.
 Switching network switches the packets that are inserted to
one or more switching channels according to the switching
header information, and outputs them to target network
processor module.
 Target network processor module receives the encapsulated
packets that are sent by the switching network through fast
switching channel. Corresponding output interface sends
them in layer-2 encapsulation format towards one or more
interface modules for processing according to the switching
header information of the packets.
 Interface module outputs the received layer-2 encapsulated
packets through the corresponding physical interface.
Packet Discarding
Interface module de-capsulate the received packets on physical
layer to form data link layer packets, and then sends them
together with the receiving interface information to the network
processor module.
Process
Theory