RE: iSCSI: Multiple IP Addresses on a Physical Network Port

[Yaron Lederman <yaronl@siliquent.com>]

Thanks for the clarifications - perhaps explicit statement of the
possibility to associate one Network Portal with multiple portal groups to
in 2.4.1 paragraph a) and/or e) would enhance clarity.

Yaron

> -----Original Message-----
> From: Mallikarjun C. [mailto:cbm@rose.hp.com]
> Sent: Tuesday, April 09, 2002 1:26 AM
> To: Yaron Lederman; John Hufferd
> Cc: Ips (E-mail)
> Subject: Re:iSCSI: Multiple IP Addresses on a Physical Network Port
> 
> 
> > 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.
> 
> Right.  The following sentence in 2.4.1 (11-91) summarizes 
> this disjoint nature -
> 
> "Each Network Portal, as utilized by a given iSCSI Node, 
> belongs to exactly one portal group within that
> node."
> --
> Mallikarjun
> 
> Mallikarjun Chadalapaka
> Networked Storage Architecture
> Network Storage Solutions Organization
> Hewlett-Packard MS 5668
> Roseville CA 95747
> cbm@rose.hp.com
> 
> ----- Original Message -----
> From: "John Hufferd" <hufferd@us.ibm.com>
> To: "Yaron Lederman" <yaronl@siliquent.com>
> Cc: "Ips (E-mail)" <ips@ece.cmu.edu>
> Sent: Monday, April 08, 2002 11:55 AM
> Subject: Re: Multiple IP Addresses on a Physical Network Port
> 
> 
> >
> > 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?
> >
> >
> >
> >
>