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Figure 35-13 compares the messages exchanged by the iSCSI routing modes.
Table 35-1 compares the advantages and dissuasiveness of the different iSCSI routing modes.
Data1
Data2
iSCSI Data-
in PDU #1,
DSlen= 1KB
Data16
Status
iSCSI
Data-in
PDU #16
Command1
Command
Response1
Command2
Data1
Data16
Status
TCP part 16
Command1
Command
Response1
Command2
Data1
Data16
Status
TCP part 16
Command1
Command
Response1
Command2
TCP part 2
Pass -Thru
Store -Forward
Cut -Thru
iSCSIinitiator MDS FC Target iSCSIinitiator MDS FC Target iSCSIinitiator MDS FC Target
TCP part 1
contains iSCSI
Data-in PDU #1
DSlen = 16KB
Wait for all
Data to
arrive
TCP part 2
Data2
Data frame is
forwarded as
it is received
130687
iSCSI
Data-in
PDU #2
TCP part 1
contains iSCSI
Data-in PDU #1
DSlen = 16KB
Mode Advantages Disadvantages