
The following table lists the description of each value.
Value
Description
Yes
Sets an inverse value for the CRC field.
No
Does not set an inverse value for the CRC field.
Configuration Guidelines
The value of
Set Inverse Value for CRC
for VCTRUNK of the local equipment must be the
same as that of
Set Inverse Value for CRC
for the VCTRUNK of the interconnected equipment.
Relationship with Other Parameters
This parameter takes effect only when
Mapping Protocol
is set to
LAPS
or
HDLC
.
7.23 Check Field Length
Description
The
Check Field Length
parameter specifies the length of the CRC field of the mapping
protocol.
Impact on the System
If
Mapping Protocol
is set to
HDLC
or
LAPS
, and if the value of
Check Field Length
is
different from that for the interconnected VCTRUNKs at the two ends, the service is interrupted.
Values
shows the value range of each type of board.
Table 7-3
The length of the CRC field supported by each type of board
Board Name
Mapping
Protocol
Value Range
Default Value
EFS8, EGT1
GFP
l
FCS32
l
No
FCS32
LAPS
l
FCS32
HDLC
l
FCS32
The following table lists the description of each value.
7 List of Parameters
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
7-24
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2011-06-30)