Return-Path: X-Sieve: cmu-sieve 2.0 Return-Path: Received: (from majordom@localhost) by ece.cmu.edu (8.11.0/8.10.2) id h321DXe20448 for ips-outgoing; Tue, 1 Apr 2003 20:13:33 -0500 (EST) X-Authentication-Warning: ece.cmu.edu: majordom set sender to owner-ips@ece.cmu.edu using -f Received: from mail.ivivity.com ([64.238.111.99]) by ece.cmu.edu (8.11.0/8.10.2) with ESMTP id h321DV320444 for ; Tue, 1 Apr 2003 20:13:31 -0500 (EST) Received: by ATLOPS with Internet Mail Service (5.5.2653.19) id <2CY0SAT4>; Tue, 1 Apr 2003 20:13:30 -0500 Message-ID: From: Eddy Quicksall To: Kevin Gibbons , ips@ece.cmu.edu Subject: RE: iSCSI: Portal Group clarification Date: Tue, 1 Apr 2003 20:13:29 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-ips@ece.cmu.edu Precedence: bulk Yes. Note however that a Network Portal can belong to more than one Target Portal Group but only one Target Portal Group within a single node (which is a target in this context). Eddy -----Original Message----- From: Kevin Gibbons [mailto:kgibbons@NishanSystems.com] Sent: Tuesday, April 01, 2003 6:39 PM To: ips@ece.cmu.edu Subject: iSCSI: Portal Group clarification Hi, I would like to make sure I understand the iSCSI model correctly. Can anyone confirm that a Portal, providing access to a target, is part of exactly one Portal Group at a time? My reading of the spec indicates this is true. That each Portal has a 16 bit Portal Group tag. But I would like to make sure. I believe that in iSCSI draft 20, it states that a Portal can be part of exactly one Portal Group. Please see page 15: - Portal Groups: iSCSI supports multiple connections within the same session; some implementations will have the ability to combine connections in a session across multiple Network Portals. A Portal Group defines a set of Network Portals within an iSCSI Network Entity that collectively supports the capability of coordinating a session with connections spanning these portals. Not all Network Portals within a Portal Group need participate in every session connected through that Portal Group. One or more Portal Groups may provide access to an iSCSI Node. Each Network Portal, as utilized by a given iSCSI Node, belongs to exactly one portal group within that node. Also, please see page 39 for similar wording. There is also a figure on page 40: ----------------------------IP Network--------------------- | | | +----|---------------|-----+ +----|---------+ | +---------+ +---------+ | | +---------+ | | | Network | | Network | | | | Network | | | | Portal | | Portal | | | | Portal | | | +--|------+ +---------+ | | +---------+ | | | | | | | | | | Portal | | | | Portal | | | Group 1 | | | | Group 2 | +--------------------------+ +--------------+ | | | +--------|---------------|--------------------|--------------------+ | | | | | | +----------------------------+ +-----------------------------+ | | | iSCSI Session (Target side)| | iSCSI Session (Target side) | | | | | | | | | | (TSIH = 56) | | (TSIH = 48) | | | +----------------------------+ +-----------------------------+ | | | | iSCSI Target Node | | (within Network Entity, not shown) | +------------------------------------------------------------------+ Please let me know if I am in error. Thanks very much! Kevin ------------------------------------------------- Kevin Gibbons Nishan Systems, Inc. kgibbons@NishanSystems.com (408) 519-3756 -------------------------------------------------