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ME60
Hardware Description
1 Hardware Description
Issue 01 (2018-05-07)
28
Figure 1-4
Processing and forwarding of a signal flow on the data plane
The processing and forwarding of a signal flow on the different uplink board and downlink board may
differ. For more information, see "Overall QoS Process" in the
HUAWEI ME60
Multiservice Control
Gateway Feature Description -
QoS
.
The processing of an incoming signal flow is as follows:
1.
An uplink physical interface card (PIC) provides an inbound interface for a signal flow.
Optical and electrical signals transmitted along a physical link enter the uplink PIC. The
PIC obtains the physical layer clock frequency and performs data layer link protocol
negotiation. Then the PIC encapsulates packets into Ethernet frames and sends the
frames to the uplink NP.
A PIC can receive high-speed services, such as packet over synchronous digital hierarchy
(SDH)/synchronous optical network (SONET) (POS) and Ethernet packets and low-sped services, such
as asynchronous transfer mode (ATM), time division multiplexing (TDM), and Point-to-Point Protocol
(PPP) packets. Services before they are encapsulated are not described here.
2.
The uplink NP searches a forwarding table for an outbound interface for the signal flow.
The processing is as follows: