Specifications

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Cisco SN 5428-2 Storage Router Software Configuration Guide
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Chapter 12 Command Line Interface Reference
scsirouter target crc
scsirouter target crc
To control the usage of iSCSI cyclical redundancy check (CRC) on the specified target or all targets, use
the scsirouter target crc command.
scsirouter name target {name | all} crc {always | any | never | prefer-off | prefer-on}
Syntax Description
Defaults iSCSI CRC is not the preferred mode of operation for the target.
Command Modes Administrator.
Command History
Usage Guidelines CRC codes are shortened cyclic codes used for error detection. A target configured for iSCSI CRC as
the preferred mode of operation (prefer-on) opts for data integrity over performance. A target configured
for non-CRC mode as the preferred mode of operation (prefer-off) opts for performance over data
integrity.
Depending on the initiator and target configurations, the usage of iSCSI CRC is negotiated. Table 12-19
lists the CRC negotiation outcomes for each possible pair of CRC configurations.
name The name of the SCSI routing instance to which this target belongs.
target name The name of the storage target.
target all Apply the specified iSCSI CRC usage to all targets associated with this
SCSI routing instance.
always Always force iSCSI CRC on the target.
any The target supports both CRC and non-CRC modes. The use of CRC is
negotiated to the initiator preference.
never The use of iSCSI CRC is disabled on this target.
prefer-off The use of iSCSI CRC is not the preferred mode of operation for this target,
but the target will negotiate the mode if CRC mode is the only mode
supported by the initiator. This is the default setting.
prefer-on The use of iSCSI CRC is the preferred mode of operation for this target, but
the target will function in non-CRC mode if it is the only mode supported
by the initiator.
Release Modification
3.2.1 This command was introduced.