Re: Multiple IP Addresses on a Physical Network Port

["John Hufferd" <hufferd@us.ibm.com>]

The draft states "...The separation of the iSCSI Name from the addresses
used by and for the iSCSI node allows multiple iSCSI nodes to use the same
addresses,...".  This is in section 1, under " - iSCSI Node:".

The point is, that the path to the Node, through a Portal Group, is defined
by the IP Address:Port of the Portal in which the Login arrives, and the
Target Node Name in that Login.  That is, more then one Node can use the
same IP Address:Port in one of its portals, and the Node Name in the Login
directs the connection.

This of course means that the same Network Portal, can be in different
Target Portal Groups, however, they can not be in more then one Target
Portal Group that is associated with the same Target Node.

If you look at what is returned from the SendTargets command you will
notice that the high level entity is the Node Name, and that the portal
address are subordinate to that.  This permits different Nodes to have the
same Portal address.  However, the same portal address can not be in more
than one portal group under the same Node Name.

.
.
.
John L. Hufferd
Senior Technical Staff Member (STSM)
IBM/SSG San Jose Ca
Main Office (408) 256-0403, Tie: 276-0403,  eFax: (408) 904-4688
Home Office (408) 997-6136, Cell: (408) 499-9702
Internet address: hufferd@us.ibm.com


Yaron Lederman <yaronl@siliquent.com> on 04/08/2002 12:07:33 PM

To:    John Hufferd/San Jose/IBM@IBMUS
cc:    "Ips (E-mail)" <ips@ece.cmu.edu>
Subject:    Multiple IP Addresses on a Physical Network Port



John,

In the below text it says that "a network portal can be a member of one,
and
only one, portal group"

However in your slides on slide 4 it seems that :
network portal: 10.1.40.22 port 3000 is shared between Target Portal A-1 &
B-1
network portal: 10.1.40.22 port 5000 is shared between Target Portal A-1 &
A-2

Could you please assist? I have not been able to resolve this from other
threads discussing this.

regards,
Yaron


-----Original Message-----
From: David Dillard [mailto:david.dillard@veritas.com]
Sent: Friday, March 29, 2002 5:59 PM
To: snia ip storage twg reflector (e-mail)
Subject: IPS TWG MPG: Multiple IP Addresses on a Physical Network Port


During the concall two weeks ago someone brought up the possibility of a
physical network port having more than one IP address.  This can certainly
happen.

Within the iSCSI realm this would mean that there would be one network
portal for each of the IP addresses.  Why would this be desirable?  Well, a
network portal can be a member of one, and only one, portal group.  So, if
a
user wanted to create two or more network portal groups, and that user
wanted a physical network port to be used by two or more of those portal
groups, then the user would need one network portal for each portal group
that needed to access the physical network port.  And to accomplish this
the
user would need the ability to create (and therefore destroy) network
portals.


Does everyone agree with this?