Kevin,
We need to make a decision on this one because there is no
obvious
right answer. IETF uses separate SPIs (what T10 calls SAIs)
for
IKEv2 and ESP - 8 bytes SPIs are used for IKEv2, but ESP uses 4
byte
SPIs. SCSI is using the same SPI for both purposes, and hence
needs
to pick one length - I agree with your suggestion that 8 bytes
(as
used in IKEv2-SCSI) is preferable. >From an
implementation standpoint
this would reduce the impact on reuse of the more complex
IKEv2
implementations (more complex is by comparison to
ESP).
Thanks,
--David
----------------------------------------------------
David
L. Black, Distinguished Engineer
EMC Corporation, 176 South St., Hopkinton,
MA 01748
+1 (508)
293-7953
FAX: +1 (508)
293-7786
black_david@emc.com
Mobile: +1 (978)
394-7754
----------------------------------------------------
Ralph, David, and Matt,
All the DS_SAI values in the ESP-SCSI
(07-169r5) (e.g., Table x3 — ESP-SCSI data-out buffer parameter list
descriptor without initialization vector) are shown as 4-byte values as they
are in SPC-4 Table 44 — Minimum SA parameters. However 07-437r4 shows
them as 8-byte values. I think 07-437r4 is correct and SPC-4 and 07-169
need to be modified to match.
Thanks,
Kevin D.
Butt
SCSI & Fibre Channel Architect, Tape Firmware
MS 6TYA, 9000 S.
Rita Rd., Tucson, AZ 85744
Tel: 520-799-2869 / 520-799-5280
Fax:
520-799-2723 (T/L:321)
Email address:
kdbutt@us.ibm.com
http://www-03.ibm.com/servers/storage/