
Value
Description
No
The protocol frame does not contain the CRC field. Only the
GFP protocol supports this option.
FCS32
The CRC field of the protocol frame contains 32 bits.
Configuration Guidelines
If
Mapping Protocol
is set to
HDLC
or
LAPS
, the value of
Check Field Length
must be
consistent for the interconnected VCTRUNKs at the two ends.
Relationship with Other Parameters
If
Mapping Protocol
is set to
HDLC
or
LAPS
, select
FCS32
only.
7.24 FCS Calculated Bit Sequence
Description
The
FCS Calculated Bit Sequence
parameter specifies the sequence of storing the bits in the
CRC field of the mapping protocol.
Impact on the System
If the value of
FCS Calculated Bit Sequence
for the VCTRUNK of the local equipment is
different from that of
FCS Calculated Bit Sequence
for the VCTRUNK of the interconnected
equipment, the service is interrupted.
Values
shows the value range of each type of board.
Table 7-4
FCS calculated bit sequence supported by each type of boards
Board Name
Mapping
Protocol
Value Range
Default Value
EFS8
l
GFP
l
LAPS
l
HDLC
Big endian
Little endian
l
Mapping Protocol:
GFP
l
FCS Calculated Bit
Sequence: Big endian
EGT1
l
GFP
l
LAPS
l
HDLC
Big endian
l
Mapping Protocol:
GFP
l
FCS Calculated Bit
Sequence: Big endian
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
7 List of Parameters
Issue 02 (2011-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
7-25