RE: iSCSI Naming: WWUIs, URNs, and namespaces

[Black_David@emc.com]

> No, I was not confused nor did I expect clients to turn a WWUI into an
> address as obviously you already have an address to do the reverse DNS.  I
> indicated the process as Name->IP->Reverse-Name and illustrated this
process
> by pointing to the technique that Microsoft used to obtain names from
> machines. 

I'm afraid Doug is still confused.  For connection to a specific target
identified
using a Reverse DNS name, the sequence is:

Reverse Name --> DNS name --> IP

where the first association is handled by some sort of nameservice (such as
the
LDAP server that Doug favors) and/or static configuration and the second is
the usual DNS lookup.  The first association has to be some sort of table,
directory or database lookup, as extracting the DNS component of the reverse
DNS name and trying to connect to it will not work in general.

The only way to get from IP to the reverse name is to connect to the
canonical iSCSI Target ("iscsi") and use the "Send Targets" command to
get a list of targets visible to the initiator.  Spoofing concerns
get handled at the stage where the Initiator connects to the Target
(there's a full iSCSI login that may be riding on a secure IPSec or TLS
connection, depending on how we decide to do this).  The Reverse
Name is NOT being extracted from DNS.  This mechanism
is analogous to the SCSI REPORT_LUNS command and the way
that a Fibre Channel initiator downloads a set of targets from the FC
nameserver as part of FC discovery -- both of these mechanisms
work fine in appropriate environments, and neither has anything to
do with NetBIOS.

As for LDAP - writing a draft on how to use it would be a far more
productive approach than complaining that the WG is ignoring LDAP.

--David

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David L. Black, Senior Technologist
EMC Corporation, 42 South St., Hopkinton, MA  01748
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black_david@emc.com       Mobile: +1 (978) 394-7754
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