Technical information

ADC Telecommunications, Inc.
134 CHAPTER 2: CUDA 12000 BASE SYSTEM COMMANDS
crc
Configures cyclic redundancy checking (CRC) on the current POS interface. CRC is an
error-checking mechanism that utilizes a calculated numeric value to detect errors in data
transmission. The sending device calculates a frame check sequence (FCS), then appends the
value to outgoing packets. The receiving device then recalculates the FCS and verifies that it
amounts to the same value calculated by the sender. If not, it assumes the packet transmission is
in error and requests that the sender retransmit the packet.
POS interfaces use 32-bit CRC by default. Note that both the sender and receiver must be
configured to use the same CRC — either 16-bit or 32-bit — error checking. Use the no crc
command to configure the interface to use the default 32-bit CRC.
Mode
interface:pos:csi(<c/s/i>)
Syntax
crc {16 | 32}
Arguments
Example
cli# interface 1/3/1
mode: interface:pos:csi(1/3/1)
cli# crc 16
cli#
Related Commands
■ interface on page 181
■ no crc on page 266
■ show interface pos on page 437
16 Configures the interface to use 16-bit CRC error checking.
32 Configures the interface to use 32-bit CRC error checking. (default)