Internet Draft C. DeSanti H.K. Vivek K. McCloghrie Cisco Systems S. Gai 14 August 2006 Fibre Channel Registered State Change Notification (RSCN) MIB draft-ietf-imss-fc-rscn-mib-00.txt Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/1id-abstracts.html The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. Copyright notice Copyright(C) The Internet Society (2006). All Rights Reserved. Abstract This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes managed objects for information related to the management of Fibre Channel's Registered State Change Notifications (RSCNs). Expires February 2007 [Page 1] Internet Draft Fibre Channel RSCN MIB August 2006 Table of Contents 1 Introduction ................................................. 3 1.1 Change Log ................................................. 3 2 The Internet-Standard Management Framework ................... 5 3 Short Overview of Fibre Channel .............................. 5 4 Relationship to Other MIBs ................................... 7 5 MIB Overview ................................................. 7 5.1 Fibre Channel management instance .......................... 7 5.2 Switch Index ............................................... 8 5.3 Fabric Index ............................................... 8 5.4 The t11FcRscnRegistrationGroup group ....................... 8 5.5 The t11FcRscnNotifyGroup group ............................. 8 5.6 The t11FcRscnNotifyControlGroup group ...................... 9 5.7 The t11FcRscnStatsGroup group .............................. 9 6 Definitions .................................................. 10 6.1 The T11-FC-RSCN-MIB Module ................................. 10 7 Acknowledgements ............................................. 27 8 Normative References ......................................... 27 9 Informative References ....................................... 28 10 IANA Considerations ......................................... 28 11 Security Considerations ..................................... 29 12 Authors' Addresses .......................................... 30 Expires February 2007 [Page 2] Internet Draft Fibre Channel RSCN MIB August 2006 1. Introduction This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes managed objects for information related to Registered State Change Notifications (RSCNs) [FC-LS] in a Fibre Channel network, including which Nx_Ports are registered to receive which types of RSCNs, the control and generation of SNMP notifications on registration failures, and RSCN-related statistics. This memo was previously approved by T11.5 (http://www.t11.org); it is currently a work item of the IETF's IMSS working group. This memo includes boilerplate which uses only one of the following terms, but is nevertheless required to mention all of the keywords in the following statement: The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14, RFC 2119 [RFC2119]. 1.1. Change Log This section to be deleted before publication as an RFC. 1.1.1. Initial version The initial version was submitted to T11.5 as T11/05-787v0 on 18 November 2005. 1.1.2. 6 December 2005 version The following changes were made for the version was submitted to T11.5 as T11/05-787v1 and the IETF as: draft-kzm-imss-fc-rscn-mib-01.txt. - added many clarifications, fixed typos, and finished previously- incomplete sections. - fixed compile errors in the MIB module. Expires February 2007 [Page 3] Internet Draft Fibre Channel RSCN MIB August 2006 1.1.3. 17 December 2005 version The following changes were made for the version was submitted to T11.5 as T11/05-787v2 and the IETF as: draft-kzm-imss-fc-rscn-mib-02.txt. - Replaced the one (aggregated) object t11FcRscnRejectedReasonCode by the three separate objects for Reject Reason Code, Reason Code Explanation and Reason Vendor Specific Code. - Changed the reference for definitions of RSCN and SCR to be FC-LS (instead of FC-FS). - Added URLs for T11 specifications in the Reference section. 1.1.4. 5 March 2006 version The following changes were made for the version was submitted to T11.5 as T11/06-198v0 and the IETF as: draft-kzm-imss-fc-rscn-mib-03.txt. - Explained the term "SW_RSCN" on the first usage of the phrase "an SW_ILS with a SW_RSCN payload", and replaced all subsequent uses of the phrase by SW_RSCN. - Changed "Rx" to "In" and "Tx" to "Out" in the descriptors of Counter32's, e.g., changed t11FcRscnRxRscns to t11FcRscnInRscns. - Added ten counters for the number of sent/received RSCNs for the individual 'Event Qualifier' values defined in [FC-LS]. - Many editorial changes. 1.1.5. 14 August 2006 version The following changes were made for the version was submitted to the IETF as: draft-ietf-imss-fc-rscn-mib-00.txt. - Changes to indicate the adoption of this memo as a work item of the IMSS Working Group. - Added explicit statement to all Counter32's that they have no discontinuities other than those that all Counter32s have when sysUpTime=0. Expires February 2007 [Page 4] Internet Draft Fibre Channel RSCN MIB August 2006 - Updated references to FC-SW-4 to point at "ANSI INCITS 418-2006". 2. The Internet-Standard Management Framework For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of RFC 3410 [RFC3410]. Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in STD 58, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580 [RFC2580]. 3. Short Overview of Fibre Channel The Fibre Channel (FC) is logically a bidirectional point-to-point serial data channel, structured for high performance. Fibre Channel provides a general transport vehicle for higher level protocols such as Small Computer System Interface (SCSI) command sets, the High- Performance Parallel Interface (HIPPI) data framing, IP (Internet Protocol), IEEE 802.2, and others. Physically, Fibre Channel is an interconnection of multiple communication points, called N_Ports, interconnected either by a switching network, called a Fabric, or by a point-to-point link. A Fibre Channel "node" consists of one or more N_Ports. A Fabric may consist of multiple Interconnect Elements, some of which are switches. An N_Port connects to the Fabric via a port on a switch called an F_Port. When multiple FC nodes are connected to a single port on a switch via an "Arbitrated Loop" topology, the switch port is called an FL_Port, and the nodes' ports are called NL_Ports. The term Nx_Port is used to refer to either an N_Port or an NL_Port. The term Fx_Port is used to refer to either an F_Port or an FL_Port. A switch port, which is interconnected to another switch port via an Inter Element Link (IEL), is called an E_Port. A B_Port connects a bridge device with an E_Port on a switch; a B_Port provides a subset of E_Port functionality. Many Fibre Channel components, including the fabric, each node, and Expires February 2007 [Page 5] Internet Draft Fibre Channel RSCN MIB August 2006 most ports, have globally-unique names. These globally-unique names are typically formatted as World Wide Names (WWNs). More information on WWNs can be found in [FC-FS]. WWNs are expected to be persistent across agent and unit resets. Fibre Channel frames contain 24-bit address identifiers which identify the frame's source and destination ports. Each FC port has both an address identifier and a WWN. When a fabric is in use, the FC address identifiers are dynamically assigned by a switch. Each octet of a 24-bit address represents a level in an address hierarchy, with a Domain_ID being the highest level of the hierarchy. Registered State Change Notifications (RSCNs) are defined in [FC-LS] as a means to provide Nx_Ports which have registered to receive such notifications, with a timely indication of changes in the state of nodes attached to the fabric. Specifically, an Nx_Port may choose to register, using an State Change Registration (SCR) request [FC-LS] to receive RSCNs. A Nx_Port which has registered will receive an RSCN when an event occurs which may affect the registered port's state. For example, an Nx_Port can use RSCNs as the means by which it is informed of the failures of other nodes, of new devices coming online, or even of more network-accessible storage becoming available. The payload of the RSCN indicates the type of change and includes the address of the changed port. RSCNs are often generated by the fabric, but an Nx_Port can also generate (and send to the fabric) an RSCN if and when it detects an event not visible to the fabric. The sender of an RSCN may coalesce several events into a single RSCN message. Each RSCN is a "request" which is acknowledged by the receiver with an accept or reject. An RSCN is received by an Nx_Port from the Fabric as an Extended Link Service (ELS) request [FC-LS]. The Fabric distributes RSCNs between Switches using an SW_ILS frame with an Inter-Switch RSCN payload, also known as an SW_RSCN [FC-SW-4]. So, when a Switch has directly attached Nx_Ports which have registered to receive RSCNs, it converts received SW_RSCNs (i.e., SW_ILS frames containing SW_RSCN payloads) into ELS requests containing the corresponding RSCN which it sends to each such Nx_Port. The latest standard for an interconnecting Fabric containing multiple Fabric Switch elements is [FC-SW-4]. [FC-SW-4] carries forward the earlier specification for the operation of a single Fabric in a physical infrastructure, and augments it with the definition of Virtual Fabrics and with the specification of how multiple Virtual Fabrics can operate within one (or more) physical infrastructures. Expires February 2007 [Page 6] Internet Draft Fibre Channel RSCN MIB August 2006 The use of Virtual Fabrics provides for each frame to be tagged in its header to indicate which one of several Virtual Fabrics that frame is being transmitted on. All frames entering a particular "Core Switch" [FC-SW-4] (i.e., a physical switch) on the same Virtual Fabric are processed by the same "Virtual Switch" within that Core switch. 4. Relationship to Other MIBs The first standardized MIB for Fibre Channel [RFC2837] was focused on Fibre Channel switches. It was replaced by the more generic Fibre Channel Management MIB [RFC4044] which defines basic information for Fibre Channel hosts and switches, including extensions to the standard IF-MIB [IF-MIB] for Fibre Channel interfaces. [RFC4044] includes the specification of how the generic objects defined in [IF- MIB] apply to Fibre Channel interfaces. Note that an interface's ifIndex value must be unique within an SNMP context, irrespective of how many Fibre Channel management instances (see below) and how many Fibre Channel switches are instrumented within that SNMP context. This MIB imports some common Textual Conventions defined in the T11-TC-MIB [RFC4439] and in the T11-FC-NAME-SERVER-MIB [RFC4438]. 5. MIB Overview This section explains the use of a Fibre Channel management instance, a Switch Index, and a Fabric Index. It also describes the four MIB groups contained in the MIB. 5.1. Fibre Channel management instance A Fibre Channel management instance is defined in [RFC4044] as a separable managed instance of Fibre Channel functionality. Fibre Channel functionality may be grouped into Fibre Channel management instances in whatever way is most convenient for the implementation(s). For example, one such grouping accommodates a single SNMP agent having multiple AgentX [RFC2741] sub-agents, with each sub-agent implementing a different Fibre Channel management instance. The object, fcmInstanceIndex, is IMPORTed from the FC-MGMT-MIB Expires February 2007 [Page 7] Internet Draft Fibre Channel RSCN MIB August 2006 [RFC4044] as the index value to uniquely identify each Fibre Channel management instance, for example within the same SNMP context ([RFC3411] section 3.3.1). 5.2. Switch Index The FC-MGMT-MIB [RFC4044] defines the fcmSwitchTable as a table of information about Fibre Channel switches which are managed by Fibre Channel management instances. Each Fibre Channel management instance can manage one or more Fibre Channel switches. The Switch Index, fcmSwitchIndex, is IMPORTed from the FC-MGMT-MIB as the index value to uniquely identify a Fibre Channel switch amongst those (one or more) managed by the same Fibre Channel management instance. 5.3. Fabric Index Whether operating on a physical Fabric (i.e., without Virtual Fabrics) or within a Virtual Fabric, the manner of operation of RSCNs within a/each Fabric is identical. Therefore, this MIB defines all Fabric-related information in tables which are INDEX-ed by an arbitrary integer, named a "Fabric Index", the syntax of which is IMPORTed from the T11-TC-MIB [RFC4439]. When a device is connected to a single physical Fabric, without use of any virtual Fabrics, the value of this Fabric Index will always be 1. In an environment of multiple virtual and/or physical Fabrics, this index provides a means to distinguish one Fabric from another. It is quite possible, and may even be likely, that a Fibre Channel switch will have ports connected to multiple virtual and/or physical Fabrics. Thus, in order to simplify a management protocol query concerning all the Fabrics to which a single switch is connected, fcmSwitchIndex will be listed before t11FcRscnFabricIndex when they both appear in the same INDEX clause. 5.4. The t11FcRscnRegistrationGroup group This group contains information about the Nx_Ports which have registered to receive RSCNs. 5.5. The t11FcRscnNotifyGroup group This group contains two notifications: one generated by when a switch rejects a SCR or RSCN; the other when a switch rejects a SW_RSCN. Expires February 2007 [Page 8] Internet Draft Fibre Channel RSCN MIB August 2006 5.6. The t11FcRscnNotifyControlGroup group This group contains one object for each notification in the t11FcRscnNotifyGroup group to enable/disable that notification, as well as three objects which record information about the latest rejection of an SCR, RSCN or SW_RSCN, specifically, the content (if available) of the rejected request, the source of the rejected request, and the reason for the rejection. 5.7. The t11FcRscnStatsGroup group This group contains RSCN-related statistics. Two levels of statistics are included: 1) counters at the message-type level, for: - the number of SCRs received/rejected, - the number of RSCNs sent/received/rejected, - the number of SW_RSCNs sent/received/rejected. 2) counters for each different category of sent/received RSCNs, where different categories are indicated by different values of the 'Event Qualifier' contained in an RSCN message. Note that if and when several RSCN events are coalesced into a single RSCN message, then that message may be counted in more than one of these counters. No counters are defined in this MIB for the 'Event Qualifier' value of '0001'b (meaning "Changed Name Server Object") because these types of RSCNs are counted by the t11NsInRscns and t11NsOutRscns objects already defined in [RFC4438]. Expires February 2007 [Page 9] Internet Draft Fibre Channel RSCN MIB August 2006 6. Definitions 6.1. The T11-FC-RSCN-MIB Module T11-FC-RSCN-MIB DEFINITIONS ::= BEGIN -- The Fibre Channel RSCN MIB -- -- for the monitoring of registrations by Nx_Ports to receive -- Registered State Change Notifications (RSCNs), and the -- monitoring of RSCN usage. -- IMPORTS MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, Counter32, mib-2 FROM SNMPv2-SMI -- [RFC2578] MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP FROM SNMPv2-CONF -- [RFC2580] TruthValue FROM SNMPv2-TC -- [RFC2579] fcmInstanceIndex, fcmSwitchIndex, FcNameIdOrZero, FcAddressIdOrZero FROM FC-MGMT-MIB -- [RFC4044] T11NsGs4RejectReasonCode FROM T11-FC-NAME-SERVER-MIB -- [RFC4438] T11FabricIndex FROM T11-TC-MIB; -- [RFC4439] t11FcRscnMIB MODULE-IDENTITY LAST-UPDATED "200608140000Z" ORGANIZATION "T11 " CONTACT-INFO " Claudio DeSanti Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134 USA Phone: +1 408 853-9172 EMail: cds@cisco.com Keith McCloghrie Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA USA 95134 Phone: +1 408-526-5260 Email: kzm@cisco.com" DESCRIPTION "The MIB module for the management of registrations Expires February 2007 [Page 10] Internet Draft Fibre Channel RSCN MIB August 2006 by Nx_Ports to receive RSCNs (Registered State Change Notifications) on a Fibre Channel network, as defined in FC-LS, and for the monitoring of RSCNs sent/received or rejected in a Fibre Channel network. Copyright (C) The Internet Society (2006). This version of this MIB module is part of RFC yyyy; see the RFC itself for full legal notices." -- RFC Editor: replace yyyy with actual RFC number & remove this note REVISION "200608140000Z" DESCRIPTION "Initial version of this MIB module, published as RFCyyyy." -- RFC-Editor, replace yyyy with actual RFC number & remove this note ::= { mib-2 nnn } -- to be assigned by IANA -- RFC Editor: replace nnn with IANA-assigned number & remove this note t11FcRscnNotifications OBJECT IDENTIFIER ::= { t11FcRscnMIB 0 } t11FcRscnObjects OBJECT IDENTIFIER ::= { t11FcRscnMIB 1 } t11FcRscnConformance OBJECT IDENTIFIER ::= { t11FcRscnMIB 2 } t11FcRscnRegistrations OBJECT IDENTIFIER ::= { t11FcRscnObjects 1 } t11FcRscnStats OBJECT IDENTIFIER ::= { t11FcRscnObjects 2 } t11FcRscnInformation OBJECT IDENTIFIER ::= { t11FcRscnObjects 3 } -- State Change Registration Table t11FcRscnRegTable OBJECT-TYPE SYNTAX SEQUENCE OF T11FcRscnRegEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A table of Nx_Ports that have registered to receive RSCNs on all fabrics configured on one or more Fibre Channel switches." ::= { t11FcRscnRegistrations 1 } t11FcRscnRegEntry OBJECT-TYPE SYNTAX T11FcRscnRegEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry containing information about one Nx_Port which has registered with a particular switch (identified by values of fcmInstanceIndex and fcmSwitchIndex) for a Expires February 2007 [Page 11] Internet Draft Fibre Channel RSCN MIB August 2006 particular Fabric (identified by a t11FcRscnFabricIndex value)." INDEX { fcmInstanceIndex, fcmSwitchIndex, t11FcRscnFabricIndex, t11FcRscnRegFcId } ::= { t11FcRscnRegTable 1 } T11FcRscnRegEntry ::= SEQUENCE { t11FcRscnFabricIndex T11FabricIndex, t11FcRscnRegFcId FcAddressIdOrZero, t11FcRscnRegType BITS } t11FcRscnFabricIndex OBJECT-TYPE SYNTAX T11FabricIndex MAX-ACCESS not-accessible STATUS current DESCRIPTION "An index value which uniquely identifies a particular Fabric. In a Fabric conformant to FC-SW-4, multiple Virtual Fabrics can operate within one (or more) physical infrastructures. In such a case, this index value is used to uniquely identify a particular Fabric within a physical infrastructure. In a Fabric which has (can have) only a single Fabric operating within the physical infrastructure, the value of this Fabric Index will always be 1." REFERENCE "ANSI INCITS 418-2006, Fibre Channel - Switch Fabric - 4 (FC-SW-4), 2006." ::= { t11FcRscnRegEntry 1 } t11FcRscnRegFcId OBJECT-TYPE SYNTAX FcAddressIdOrZero (SIZE (3)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The Fibre Channel Address Identifier (FC_ID) of the registering Nx_Port." ::= { t11FcRscnRegEntry 2 } t11FcRscnRegType OBJECT-TYPE SYNTAX BITS { Expires February 2007 [Page 12] Internet Draft Fibre Channel RSCN MIB August 2006 fromFabricController(0), fromNxPort(1) } MAX-ACCESS read-only STATUS current DESCRIPTION "This object indicates the type of registration desired by the registering Nx_Port, one bit per type: 'fromFabricController' -- RSCNs generated for events detected by the Fabric Controller. 'fromNxPorts' -- RSCNs generated for events detected by the affected Nx_Port." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, table 44, June 2005." ::= { t11FcRscnRegEntry 3 } -- Statistics t11FcRscnStatsTable OBJECT-TYPE SYNTAX SEQUENCE OF T11FcRscnStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The RSCN-related statistics on all fabrics configured on one or more Fibre Channel switches. Two levels of statistics are included: 1) counters at the message-type level, for: - the number of SCRs received/rejected, - the number of RSCNs sent/received/rejected, - the number of SW_RSCNs sent/received/rejected. 2) counters of sent/received RSCNs per 'Event Qualifier' value. Note that if and when several RSCN events are coalesced into a single RSCN message, then that message may be counted in more than one of these counters." ::= { t11FcRscnStats 1 } t11FcRscnStatsEntry OBJECT-TYPE Expires February 2007 [Page 13] Internet Draft Fibre Channel RSCN MIB August 2006 SYNTAX T11FcRscnStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry containing statistics for a particular Fabric (identified by a t11FcRscnFabricIndex value) on a particular switch (identified by values of fcmInstanceIndex and fcmSwitchIndex)." INDEX { fcmInstanceIndex, fcmSwitchIndex, t11FcRscnFabricIndex } ::= { t11FcRscnStatsTable 1 } T11FcRscnStatsEntry ::= SEQUENCE { t11FcRscnInScrs Counter32, t11FcRscnInRscns Counter32, t11FcRscnOutRscns Counter32, t11FcRscnInSwRscns Counter32, t11FcRscnOutSwRscns Counter32, t11FcRscnScrRejects Counter32, t11FcRscnRscnRejects Counter32, t11FcRscnSwRscnRejects Counter32 t11FcRscnInUnspecifiedRscns Counter32, t11FcRscnOutUnspecifiedRscns Counter32, t11FcRscnInChangedAttribRscns Counter32, t11FcRscnOutChangedAttribRscns Counter32, t11FcRscnInChangedServiceRscns Counter32, t11FcRscnOutChangedServiceRscns Counter32, t11FcRscnInChangedSwitchRscns Counter32, t11FcRscnOutChangedSwitchRscns Counter32, t11FcRscnInRemovedRscns Counter32, t11FcRscnOutRemovedRscns Counter32 } t11FcRscnInScrs OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of SCRs received from Nx_Ports by this switch on this fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." ::= { t11FcRscnStatsEntry 1 } Expires February 2007 [Page 14] Internet Draft Fibre Channel RSCN MIB August 2006 t11FcRscnInRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RSCNs received from Nx_Ports by this switch on this fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." ::= { t11FcRscnStatsEntry 2 } t11FcRscnOutRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RSCNs transmitted to Nx_Ports by this switch on this fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." ::= { t11FcRscnStatsEntry 3 } t11FcRscnInSwRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of SW_RSCNs received by this switch from other switches on this fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." ::= { t11FcRscnStatsEntry 4 } t11FcRscnOutSwRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of SW_RSCNs transmitted by this switch from other switches on this fabric. Expires February 2007 [Page 15] Internet Draft Fibre Channel RSCN MIB August 2006 This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." ::= { t11FcRscnStatsEntry 5 } t11FcRscnScrRejects OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of SCRs rejected by this switch on this fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." ::= { t11FcRscnStatsEntry 6 } t11FcRscnRscnRejects OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of RSCNs rejected by this switch on this fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." ::= { t11FcRscnStatsEntry 7 } t11FcRscnSwRscnRejects OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of SW_RSCN rejected by this switch on this fabric. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." ::= { t11FcRscnStatsEntry 8 } t11FcRscnInUnspecifiedRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION Expires February 2007 [Page 16] Internet Draft Fibre Channel RSCN MIB August 2006 "The number of Registered State Change Notifications (RSCNs) received by this switch on this fabric which contained an RSCN Event Qualifier value of '0000'b meaning 'Event is not specified'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 9 } t11FcRscnOutUnspecifiedRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Registered State Change Notifications (RSCNs) sent by this switch on this fabric which contained an RSCN Event Qualifier value of '0000'b meaning 'Event is not specified'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 10 } t11FcRscnInChangedAttribRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Registered State Change Notifications (RSCNs) received by this switch on this fabric which contained an RSCN Event Qualifier value of '0002'b meaning 'Changed Port Attribute'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 11 } Expires February 2007 [Page 17] Internet Draft Fibre Channel RSCN MIB August 2006 t11FcRscnOutChangedAttribRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Registered State Change Notifications (RSCNs) sent by this switch on this fabric which contained an RSCN Event Qualifier value of '0002'b meaning 'Changed Port Attribute'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 12 } t11FcRscnInChangedServiceRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Registered State Change Notifications (RSCNs) received by this switch on this fabric which contained an RSCN Event Qualifier value of '0003'b meaning 'Changed Service Object'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 13 } t11FcRscnOutChangedServiceRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Registered State Change Notifications (RSCNs) sent by this switch on this fabric which contained an RSCN Event Qualifier value of '0003'b meaning 'Changed Service Object'. This counter has no discontinuities other than Expires February 2007 [Page 18] Internet Draft Fibre Channel RSCN MIB August 2006 those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 14 } t11FcRscnInChangedSwitchRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Registered State Change Notifications (RSCNs) received by this switch on this fabric which contained an RSCN Event Qualifier value of '0004'b meaning 'Changed Switch Configuration'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 15 } t11FcRscnOutChangedSwitchRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Registered State Change Notifications (RSCNs) sent by this switch on this fabric which contained an RSCN Event Qualifier value of '0004'b meaning 'Changed Switch Configuration'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 16 } t11FcRscnInRemovedRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION Expires February 2007 [Page 19] Internet Draft Fibre Channel RSCN MIB August 2006 "The number of Registered State Change Notifications (RSCNs) received by this switch on this fabric which contained an RSCN Event Qualifier value of '0005'b meaning 'Removed Object'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 17 } t11FcRscnOutRemovedRscns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Registered State Change Notifications (RSCNs) sent by this switch on this fabric which contained an RSCN Event Qualifier value of '0005'b meaning 'Removed Object'. This counter has no discontinuities other than those that all Counter32s have when sysUpTime=0." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 40." ::= { t11FcRscnStatsEntry 18 } -- -- Notification Control Table -- t11FcRscnNotifyControlTable OBJECT-TYPE SYNTAX SEQUENCE OF T11FcRscnNotifyControlEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A table of control information for notifications generated due to the rejection of an SCR or RSCN." ::= { t11FcRscnInformation 1 } t11FcRscnNotifyControlEntry OBJECT-TYPE SYNTAX T11FcRscnNotifyControlEntry MAX-ACCESS not-accessible Expires February 2007 [Page 20] Internet Draft Fibre Channel RSCN MIB August 2006 STATUS current DESCRIPTION "Each entry contains notification control information concerning the rejection of RSCN/SCRs for a particular fabric (identified by the value of t11FcRscnFabricIndex) by a particular switch (identified by values of fcmInstanceIndex and fcmSwitchIndex)." INDEX { fcmInstanceIndex, fcmSwitchIndex, t11FcRscnFabricIndex } ::= { t11FcRscnNotifyControlTable 1 } T11FcRscnNotifyControlEntry ::= SEQUENCE { t11FcRscnIlsRejectNotifyEnable TruthValue, t11FcRscnElsRejectNotifyEnable TruthValue, t11FcRscnRejectedRequestString OCTET STRING, t11FcRscnRejectedRequestSource FcNameIdOrZero, t11FcRscnRejectReasonCode T11NsGs4RejectReasonCode, t11FcRscnRejectReasonCodeExp OCTET STRING, t11FcRscnRejectReasonVendorCode OCTET STRING } t11FcRscnIlsRejectNotifyEnable OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-write STATUS current DESCRIPTION "This object specifies if a t11FcRscnIlsRejectReqNotify notification should be generated when this switch rejects an SW_RSCN on this fabric. Values written to this object should be retained over agent reboots." DEFVAL { false } ::= { t11FcRscnNotifyControlEntry 1 } t11FcRscnElsRejectNotifyEnable OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-write STATUS current DESCRIPTION "This object specifies if a t11FcRscnElsRejectReqNotify notification should be generated when this switch rejects an RSCN or SCR on this fabric. Values written to this object should be retained over agent reboots." Expires February 2007 [Page 21] Internet Draft Fibre Channel RSCN MIB August 2006 DEFVAL { false } ::= { t11FcRscnNotifyControlEntry 2 } t11FcRscnRejectedRequestString OBJECT-TYPE SYNTAX OCTET STRING (SIZE (0..255)) MAX-ACCESS read-only STATUS current DESCRIPTION "The binary content of the RSCN or SCR or SW_RSCN which was most recently rejected by this switch on this fabric. The value is formatted as an octet string (in network byte order) containing the payload of the rejected RSCN or SCR as described in FC-LS, or the rejected SW_RSCN as described in FC-SW-4. This object contains the zero-length string if and when the RSCN/SCR/SW_RSCN payload is unavailable. When the length of this object is 255 octets, it contains the first 255 octets of the payload (in network-byte order)." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, tables 38 & 43. ANSI INCITS 418-2006, Fibre Channel - Switch Fabric - 4 (FC-SW-4), 2006, table 45." ::= { t11FcRscnNotifyControlEntry 3 } t11FcRscnRejectedRequestSource OBJECT-TYPE SYNTAX FcNameIdOrZero MAX-ACCESS read-only STATUS current DESCRIPTION "The WWN which was the source of the RSCN, SCR or SW_RSCN which was most recently rejected by this switch on this fabric." ::= { t11FcRscnNotifyControlEntry 4 } t11FcRscnRejectReasonCode OBJECT-TYPE SYNTAX T11NsGs4RejectReasonCode MAX-ACCESS read-only STATUS current DESCRIPTION "This object contains the Reason Code of the most recent rejection by this switch of an RSCN, SCR or SW_RSCN on this fabric." Expires February 2007 [Page 22] Internet Draft Fibre Channel RSCN MIB August 2006 REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 148. ANSI INCITS 418-2006, Fibre Channel - Switch Fabric - 4 (FC-SW-4), 2006, table 5." ::= { t11FcRscnNotifyControlEntry 5 } t11FcRscnRejectReasonCodeExp OBJECT-TYPE SYNTAX OCTET STRING (SIZE(1)) MAX-ACCESS read-only STATUS current DESCRIPTION "This object contains the Reason Code Explanation of the most recent rejection by this switch of an RSCN, SCR or SW_RSCN on this fabric." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 149. ANSI INCITS 418-2006, Fibre Channel - Switch Fabric - 4 (FC-SW-4), 2006, table 6." ::= { t11FcRscnNotifyControlEntry 6 } t11FcRscnRejectReasonVendorCode OBJECT-TYPE SYNTAX OCTET STRING (SIZE(1)) MAX-ACCESS read-only STATUS current DESCRIPTION "This object contains the Reason Vendor Specific Code of the most recent rejection by this switch of an RSCN, SCR or SW_RSCN on this fabric." REFERENCE "ANSI INCITS xxx-200n, Fibre Channel - Link Services (FC-LS), Rev 1.2, June 2005, table 148. ANSI INCITS 418-2006, Fibre Channel - Switch Fabric - 4 (FC-SW-4), 2006, section 6.1.3." ::= { t11FcRscnNotifyControlEntry 7 } -- Notifications t11FcRscnElsRejectReqNotify NOTIFICATION-TYPE OBJECTS { t11FcRscnRejectedRequestString, Expires February 2007 [Page 23] Internet Draft Fibre Channel RSCN MIB August 2006 t11FcRscnRejectedRequestSource, t11FcRscnRejectReasonCode, t11FcRscnRejectReasonCodeExp, t11FcRscnRejectReasonVendorCode } STATUS current DESCRIPTION "This notification is generated when a switch rejects an SCR or RSCN. The value of t11FcRscnRejectedRequestString indicates the binary content of the rejected request if available, or the zero-length string otherwise. The source of the rejected request is given by t11FcRscnRejectedRequestSource, and the reason for rejection is given by the values of t11FcRscnRejectReasonCode, t11FcRscnRejectReasonCodeExp and t11FcRscnRejectReasonVendorCode." ::= { t11FcRscnNotifications 1 } t11FcRscnIlsRejectReqNotify NOTIFICATION-TYPE OBJECTS { t11FcRscnRejectedRequestString, t11FcRscnRejectedRequestSource, t11FcRscnRejectReasonCode, t11FcRscnRejectReasonCodeExp, t11FcRscnRejectReasonVendorCode } STATUS current DESCRIPTION "This notification is generated when a switch rejects an SW_RSCN. The value of t11FcRscnRejectedRequestString indicates the binary content of the rejected request if available, or the zero-length string otherwise. The source of the rejected request is given by t11FcRscnRejectedRequestSource, and the reason for rejection is given by the values of t11FcRscnRejectReasonCode, t11FcRscnRejectReasonCodeExp and t11FcRscnRejectReasonVendorCode." ::= { t11FcRscnNotifications 2 } -- Conformance t11FcRscnCompliances OBJECT IDENTIFIER ::= { t11FcRscnConformance 1 } t11FcRscnGroups OBJECT IDENTIFIER ::= { t11FcRscnConformance 2 } t11FcRscnCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION Expires February 2007 [Page 24] Internet Draft Fibre Channel RSCN MIB August 2006 "The compliance statement for entities which implement this MIB." MODULE MANDATORY-GROUPS { t11FcRscnRegistrationGroup, t11FcRscnNotifyControlGroup, t11FcRscnNotifyGroup } GROUP t11FcRscnStatsGroup DESCRIPTION "These counters, containing RSCN-related statistics, are mandatory only for those systems which count such events." OBJECT t11FcRscnIlsRejectNotifyEnable MIN-ACCESS read-only DESCRIPTION "Write access is not required." OBJECT t11FcRscnElsRejectNotifyEnable MIN-ACCESS read-only DESCRIPTION "Write access is not required." ::= { t11FcRscnCompliances 1 } -- Units of conformance t11FcRscnRegistrationGroup OBJECT-GROUP OBJECTS { t11FcRscnRegType } STATUS current DESCRIPTION "A collection of objects for monitoring RSCN registrations." ::= { t11FcRscnGroups 1 } t11FcRscnStatsGroup OBJECT-GROUP OBJECTS { t11FcRscnInScrs, t11FcRscnInRscns, t11FcRscnOutRscns, t11FcRscnInSwRscns, t11FcRscnOutSwRscns, t11FcRscnScrRejects, t11FcRscnRscnRejects, t11FcRscnSwRscnRejects, t11FcRscnInUnspecifiedRscns, Expires February 2007 [Page 25] Internet Draft Fibre Channel RSCN MIB August 2006 t11FcRscnOutUnspecifiedRscns, t11FcRscnInChangedAttribRscns, t11FcRscnOutChangedAttribRscns, t11FcRscnInChangedServiceRscns, t11FcRscnOutChangedServiceRscns, t11FcRscnInChangedSwitchRscns, t11FcRscnOutChangedSwitchRscns, t11FcRscnInRemovedRscns, t11FcRscnOutRemovedRscns } STATUS current DESCRIPTION "A collection of objects for collecting RSCN-related statistics." ::= { t11FcRscnGroups 2 } t11FcRscnNotifyControlGroup OBJECT-GROUP OBJECTS { t11FcRscnIlsRejectNotifyEnable, t11FcRscnElsRejectNotifyEnable, t11FcRscnRejectedRequestString, t11FcRscnRejectedRequestSource, t11FcRscnRejectReasonCode, t11FcRscnRejectReasonCodeExp, t11FcRscnRejectReasonVendorCode } STATUS current DESCRIPTION "A collection of notification control and notification information objects." ::= { t11FcRscnGroups 3 } t11FcRscnNotifyGroup NOTIFICATION-GROUP NOTIFICATIONS { t11FcRscnIlsRejectReqNotify, t11FcRscnElsRejectReqNotify } STATUS current DESCRIPTION "A collection of notifications for monitoring ILS and ELS rejections by the RSCN module." ::= { t11FcRscnGroups 4 } END Expires February 2007 [Page 26] Internet Draft Fibre Channel RSCN MIB August 2006 7. Acknowledgements This document began life as a work item of the INCITS Task Group T11.5, and was subsequently approved by T11. It later became a work item of the IETF's IMSS Working Group. We wish to acknowledge the contributions and comments from the INCITS Technical Committee T11 and the IMSS Working Group, including the following: T11 Chair: Robert Snively, Brocade T11 Vice Chair: Claudio DeSanti, Cisco Systems T11.5 Chair: Roger Cummings, Symantec T11.5 Vice Chair: Scott Kipp, McData and T11.5 members. IMSS WG chair: David Black, EMC 8. Normative References [RFC2578] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999. [RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999. [RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999. [RFC3411] Harrington, D., Presuhn, R., and B. Wijnen, "An Architecture for Describing Simple Network Management Protocol (SNMP) Management Frameworks", STD 58, RFC 3411, December 2002. [IF-MIB] McCloghrie, K., and F. Kastenholz, "The Interfaces Group MIB", RFC 2863, June 2000. [RFC4044] K. McCloghrie, "Fibre Channel Management MIB", RFC 4044, May 2005. Expires February 2007 [Page 27] Internet Draft Fibre Channel RSCN MIB August 2006 [RFC4438] DeSanti, C., Gaonkar, V., Vivek, H.K., McCloghrie, K., and S. Gai, "Fibre-Channel Name Server MIB", RFC 4438, March 2006. [RFC4439] DeSanti, C., Gaonkar, V., McCloghrie, K., and S. Gai, "Fibre- Channel Fabric Address Manager MIB", RFC 4439, March 2006. [FC-SW-4] "Fibre Channel - Switch Fabric - 4 (FC-SW-4)", ANSI INCITS 418-2006, http://www.t11.org/t11/stat.nsf/upnum/1674-d, 2006. [FC-FS] "Fibre Channel - Framing and Signaling (FC-FS)", ANSI INCITS 373-2003, http://www.t11.org/t11/stat.nsf/upnum/1331-d, April 2003. [FC-LS] "Fibre Channel - Link Services (FC-LS)", ANSI INCITS xxx-200n, Rev 1.2, http://www.t11.org/t11/stat.nsf/upnum/1620-d, June 2005. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. 9. Informative References [RFC2741] Daniele, M., Wijnen, B., Ellison, M., and D. Francisco, "Agent Extensibility (AgentX) Protocol Version 1", RFC 2741, January 2000. [RFC2837] Teow, K., "Definitions of Managed Objects for the Fabric Element in Fibre Channel Standard", RFC 2837, May 2000. [RFC3410] Case, J., Mundy, R., Partain, D. and B. Stewart, "Introduction and Applicability Statements for Internet-Standard Management Framework", RFC 3410, December 2002. 10. IANA Considerations IANA is requested to make a MIB OID assignment for the T11-FC-RSCN-MIB module, under the appropriate subtree. Expires February 2007 [Page 28] Internet Draft Fibre Channel RSCN MIB August 2006 11. Security Considerations There are a number of management objects defined in this MIB module with a MAX-ACCESS clause of read-write and/or read-create. Such objects may be considered sensitive or vulnerable in some network environments. The support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. These objects and their sensitivity/vulnerability are: t11FcRscnIlsRejectNotifyEnable t11FcRscnElsRejectNotifyEnable -- ability to enable/disable a notification. Some of the readable objects in this MIB module (i.e., objects with a MAX-ACCESS other than not-accessible) may also be considered sensitive or vulnerable in some network environments. It is thus important to control even GET and/or NOTIFY access to these objects and possibly to even encrypt the values of these objects when sending them over the network via SNMP. These are the tables and objects and their sensitivity/vulnerability: t11FcRscnRegTable -- contains a list of Nx_Ports which are currently registered to received RSCNs. t11FcRscnStatsTable -- contains RSCN-related statistics. t11FcRscnNotifyControlTable -- contains control and logging information for notifications which are concerned with the rejection of RSCN-related requests. SNMP versions prior to SNMPv3 did not include adequate security. Even if the network itself is secure (for example by using IPSec), even then, there is no control as to who on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB module. It is RECOMMENDED that implementors consider the security features as provided by the SNMPv3 framework (see [RFC3410], section 8), including full support for the SNMPv3 cryptographic mechanisms (for authentication and privacy). Further, deployment of SNMP versions prior to SNMPv3 is NOT RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to enable cryptographic security. It is then a customer/operator Expires February 2007 [Page 29] Internet Draft Fibre Channel RSCN MIB August 2006 responsibility to ensure that the SNMP entity giving access to an instance of this MIB module is properly configured to give access to the objects only to those principals (users) that have legitimate rights to indeed GET or SET (change/create/delete) them. 12. Authors' Addresses Claudio DeSanti Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134 USA Phone: +1 408 853-9172 EMail: cds@cisco.com H.K. Vivek Cisco Systems, Inc. 71 Millers Rd Bangalore, India Phone: +91 80 2289933x5117 EMail: hvivek@cisco.com Keith McCloghrie Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA USA 95134 Phone: +1 408-526-5260 Email: kzm@cisco.com Silvano Gai Retired Full Copyright Statement Copyright (C) The Internet Society (2006). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED Expires February 2007 [Page 30] Internet Draft Fibre Channel RSCN MIB August 2006 WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Disclaimer of validity The IETF takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; nor does it represent that it has made any independent effort to identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. Copies of IPR disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at ietf-ipr@ietf.org. Acknowledgment Funding for the RFC Editor function is currently provided by the Internet Society. Expires February 2007 [Page 31]