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

["Mallikarjun C." <cbm@rose.hp.com>]

> 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?
>
>
>
>