System information

Table Of Contents

Configuring iSCSI Connections

5-11

Configuring iSCSI Ports

NOTE: Digest and large PDU cannot both be enabled at the same

time.

• Initial R2T - (request to transfer). This skips the requirement

for an initial R2T in unidirectional and the output part of

bidirectional commands.

• Store and Forward - Enables the SAN Router to wait until all the

data is received from a drive before delivering it to the

initiator.

• Target Read Padding - Some earlier iSCSI initiators could not

handle true data underrun cases, where the target returns less

data than what the initiator requests. To accommodate those

initiators a target read padding option is provided in the SAN

Router. When enabled, the SAN Router (iSCSI target) will pad

the data, if needed, to meet the iSCSI initiator's expected data

length. The SCSI response indicates the actual data underrun

details.

• Target Write Padding - Some earlier iSCSI initiators did not pad

write data to 32-bit boundaries, as required by the iSCSI

specification. To accommodate these initiators, the target write

padding option is provided.

NOTE: If target write padding is enabled on a port, all initiators that

• NOP packets - This sends NOPs on idle connections to keep the

iSCSI session active. The default setting is On.

• Immediate Data - Data sent along with an iSCSI command. The

initiator and target negotiate support for immediate data. The

default setting is On.

• Authentication method - This determines whether or not this

intelligent port authenticates iSCSI initiators to determine

access permission to iSCSI targets. Choices are None, CHAP

Preferred (initiators are authenticated via CHAP, if the initiator

supports CHAP, but other logins that do not support

authentication are also accepted), and CHAP Required

(initiators are always authenticated via CHAP).