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authorThomas Voss <mail@thomasvoss.com> 2024-11-27 20:54:24 +0100
committerThomas Voss <mail@thomasvoss.com> 2024-11-27 20:54:24 +0100
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+
+Network Working Group K. Rehbehn
+Request for Comments: 2955 Megisto Systems
+Category: Standards Track O. Nicklass
+ RAD Data Communications, Ltd.
+ G. Mouradian
+ AT&T Labs
+ October 2000
+
+
+ Definitions of Managed Objects
+ for Monitoring and Controlling the
+ Frame Relay/ATM PVC Service Interworking Function
+
+Status of this Memo
+
+ This document specifies an Internet standards track protocol for the
+ Internet community, and requests discussion and suggestions for
+ improvements. Please refer to the current edition of the "Internet
+ Official Protocol Standards" (STD 1) for the standardization state
+ and status of this protocol. Distribution of this memo is unlimited.
+
+Copyright Notice
+
+ Copyright (C) The Internet Society (2000). All Rights Reserved.
+
+Abstract
+
+ This memo defines a Management Information Base (MIB) to configure,
+ monitor, and control a service interworking function (IWF) for
+ Permanent Virtual Connections (PVC) between Frame Relay and
+ Asynchronous Transfer Mode (ATM) technologies.
+
+Table of Contents
+
+ 1. The SNMP Management Framework ............................... 2
+ 2. Conventions ................................................. 3
+ 3. Overview .................................................... 3
+ 3.1 Frame Relay/ATM Service Interworking Background ............ 4
+ 3.2 Structure of the MIB ....................................... 4
+ 3.3 Relationship to Other MIBs ................................. 5
+ 3.3.1 Frame Relay Service MIB .................................. 6
+ 3.3.2 Frame Relay DTE MIB ...................................... 6
+ 3.3.3 ATM MIB .................................................. 6
+ 3.3.4 IF MIB ................................................... 7
+ 3.4 Point to Multipoint Considerations ......................... 7
+ 3.5 Theory of Operation ........................................ 7
+ 3.5.1 Creation Process ......................................... 7
+ 3.5.2 Destruction Process ...................................... 10
+
+
+
+Rehbehn, et al. Standards Track [Page 1]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ 3.5.3 Modification Process ..................................... 11
+ 4. Object Definitions .......................................... 11
+ 4.1 The FR/ATM PVC Service IWF Connection Group ................ 13
+ 4.2 The FR/ATM PVC Service IWF Connection Descriptor Group ..... 21
+ 5. Augmentation of ATM MIB VCL Endpoint Entry (atmVclEntry) .... 27
+ 6. Frame Relay/ATM PVC Service Interworking NOTIFICATION ....... 29
+ 7. Conformance Information ..................................... 29
+ 7.1 Compliance Statement For Equipment ......................... 29
+ 7.2 Compliance Statement For Service (CNM Interface) ........... 30
+ 7.3 Units of Conformance ....................................... 32
+ 7.3.1 Basic FR/ATM IWF PVC Connection Group .................... 32
+ 7.3.2 FR/ATM IWF PVC Connection Descriptor Group ............... 32
+ 7.3.3 ATM MIB VCL Endpoint Table Augmentation .................. 33
+ 7.3.4 Notification Group ....................................... 33
+ 8. Acknowledgments ............................................. 34
+ 9. References .................................................. 34
+ 10. Security Considerations .................................... 36
+ 11. Authors' Addresses ......................................... 37
+ 12. Intellectual Property Rights ............................... 38
+ 13. Full Copyright Statement ................................... 39
+
+1. The SNMP Management Framework
+
+ The SNMP Management Framework presently consists of five major
+ components:
+
+ o An overall architecture, described in RFC 2571 [1].
+
+ o Mechanisms for describing and naming objects and events for the
+ purpose of management. The first version of this Structure of
+ Management Information (SMI) is called SMIv1 and described in STD
+ 16, RFC 1155 [2], STD 16, RFC 1212 [3] and RFC 1215 [4]. The
+ second version, called SMIv2, is described in STD 58, RFC 2578
+ [5], STD 58, RFC 2579 [6] and STD 58, RFC 2580 [7].
+
+ o Message protocols for transferring management information. The
+ first version of the SNMP message protocol is called SNMPv1 and
+ described in STD 15, RFC 1157 [8]. A second version of the SNMP
+ message protocol, which is not an Internet standards track
+ protocol, is called SNMPv2c and described in RFC 1901 [9] and RFC
+ 1906 [10]. The third version of the message protocol is called
+ SNMPv3 and described in RFC 1906 [10], RFC 2572 [11] and RFC 2574
+ [12].
+
+
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 2]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ o Protocol operations for accessing management information. The
+ first set of protocol operations and associated PDU formats is
+ described in STD 15, RFC 1157 [8]. A second set of protocol
+ operations and associated PDU formats is described in RFC 1905
+ [13].
+
+ o A set of fundamental applications described in RFC 2573 [14] and
+ the view-based access control mechanism described in RFC 2575
+ [15].
+
+ A more detailed introduction to the current SNMP Management Framework
+ can be found in RFC 2570 [16].
+
+ Managed objects are accessed via a virtual information store, termed
+ the Management Information Base or MIB. Objects in the MIB are
+ defined using the mechanisms defined in the SMI.
+
+ This memo specifies a MIB module that is compliant to the SMIv2. A
+ MIB conforming to the SMIv1 can be produced through the appropriate
+ translations. The resulting translated MIB must be semantically
+ equivalent, except where objects or events are omitted because no
+ translation is possible (use of Counter64). Some machine readable
+ information in SMIv2 will be converted into textual descriptions in
+ SMIv1 during the translation process. However, this loss of machine
+ readable information is not considered to change the semantics of the
+ MIB.
+
+2. Conventions
+
+ The keywords MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD,
+ SHOULD NOT, RECOMMENDED, NOT RECOMMENDED, MAY, and OPTIONAL, when
+ they appear in this document, are to be interpreted as described in
+ RFC 2119 [23].
+
+3. Overview
+
+ This document defines a Management Information Base (MIB) for
+ monitoring and controlling a service interworking function (IWF) for
+ Permanent Virtual Connections (PVC) between Frame Relay and
+ Asynchronous Transfer Mode (ATM) technologies. The agreements on
+ which this MIB is based were reached jointly by the Frame Relay Forum
+ and the ATM Forum and are documented in the Frame Relay Forum
+ Document FRF.8 [17].
+
+
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 3]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+3.1. Frame Relay/ATM Service Interworking Background
+
+ Frame relay to ATM interworking is a function that exchanges Protocol
+ Data Units (PDU) between a frame relay service user and an ATM
+ service user. Two types of interworking functions are specified for
+ frame relay and ATM permanent virtual connection (PVC) service users:
+ network interworking and service interworking.
+
+ Network interworking provides PDU forwarding between frame relay
+ service users inter-connected by an ATM service. Both endpoints are
+ frame relay PVCs. Frame Relay to ATM PVC Network Interworking is
+ defined in [20].
+
+ Service interworking provides PDU forwarding so that the ATM service
+ user performs no frame relaying service-specific functions and the
+ frame relay service user performs no ATM service-specific functions.
+ Optionally, the service IWF translates particular higher layer
+ protocols to satisfy the requirements of end-systems. Frame Relay to
+ ATM PVC Service Interworking is defined in [17].
+
+ This MIB describes management objects used to provision, monitor, and
+ control a Frame Relay/ATM PVC Service IWF.
+
+ FRF.8 [17] does not address point-to-multipoint applications of the
+ IWF. Implementations MAY provide support for point-to-multipoint
+ capability using this MIB.
+
+ Consult FRF.8 [17] for more details on the operation of a Frame
+ Relay/ATM PVC Service IWF.
+
+3.2. Structure of the MIB
+
+ The Frame Relay/ATM PVC Service IWF managed objects are organized as
+ follows:
+
+ (1) FR/ATM PVC Service IWF cross-connect table,
+
+ (2) Connection description table, and
+
+ (3) Notification object
+
+ The IWF cross-connect table contains one or more rows for each
+ inter-worked connection. Each inter-worked connection is uniquely
+ identified by the frAtmIwfConnIndex object. In the case of point-to-
+ point, a single row is present. In the case of point-to-multipoint,
+ one row exists for each multipoint destination. Index objects for
+ the ATM port, VPI, VCI, frame relay port, and frame relay DLCI
+ distinguish the constituent rows used in a point-to-multipoint case.
+
+
+
+Rehbehn, et al. Standards Track [Page 4]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ Each inter-worked connection has attributes governing behavior of the
+ IWF. These attributes describe how the IWF should transform a PDU
+ during the forwarding process and provide rules for:
+
+ (1) Mapping the ATM CLP bit to frame relay DE bit
+
+ (2) Mapping the ATM congestion notification bit to frame relay
+ congestion bits
+
+ (3) Mapping higher protocol encapsulations between ATM and frame
+ relay
+
+ (4) Performing fragmentation and reassembly
+
+ (5) Performing ARP translation between ATM and frame relay
+
+ Typically, most connections share the same attributes. The
+ attributes are represented in this MIB by the connection description
+ table. Each row of the connection description table contains the
+ attribute settings common to one or more inter-worked connections.
+ One example would be full mapping and translation. All cross-connect
+ table entries that require full mapping and translation services set
+ the frAtmIwfConnectionDescriptor object to the index value for the
+ connection description table row that contains objects set to values
+ that provide full mapping and translation services.
+
+ A notification object provides cross-connect status change alerts.
+
+3.3. Relationship to Other MIBs
+
+ The Frame Relay/ATM PVC Service IWF MIB describes the cross-
+ connections between frame relay and ATM service users. Each PVC
+ endpoint is provisioned and managed with a technology-specific MIB as
+ described below.
+
+ Each technology-specific MIB has a table of PVC endpoints (indexed by
+ ifIndex and logical link address such as the DLCI or VPI/VCI). In
+ the absence of interworking, two endpoints are cross-connected via a
+ technology-specific cross connect table (e.g., the
+ atmVcCrossConnectTable in the ATM MIB). However, a connection
+ between a frame relay endpoint and an ATM endpoint requires a cross-
+ connect in the ATM IWF MIB.
+
+ The following sections describe the relationship between the
+ technology-specific MIBs and the FR/ATM PVC Service IWF MIB.
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 5]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+3.3.1. Frame Relay Service MIB
+
+ Frame relay PVC endpoints are provisioned as rows in the Frame Relay
+ Services MIB [19] endpoint table.
+
+ Each frame relay PVC endpoint is described in the frPVCEndptTable. A
+ connection between two frame relay endpoints is described by an entry
+ in the frame relay PVC cross-connect table frPVCConnectTable. The
+ frPVCEndptConnectIdentifier object of each endpoint points to the
+ frPVCConnectTable cross-connect table row for the connection.
+
+ In the case of an inter-worked connection, the
+ frPVCEndptConnectIdentifier object is set to zero. Instead, the
+ frPVCEndptAtmIwfConnIndex object is set to the index of the FR/ATM
+ IWF cross-connect table row.
+
+ The frame relay PVC cross-connect table (frPVCConnectTable) does not
+ contain an entry for the FR/ATM inter-worked connection.
+
+ Note that the frPVCEndptConnectIdentifier and
+ frPVCEndptAtmIwfConnIndex objects are set by the system as a side-
+ effect of cross-connect establishment. Consequently, these objects
+ are read-only.
+
+3.3.2. Frame Relay DTE MIB
+
+ The Frame Relay DTE MIB described in [24] has no relevance to the
+ FR/ATM PVC Service IWF MIB.
+
+3.3.3. ATM MIB
+
+ ATM PVC endpoints are provisioned as rows in the ATM MIB [21] virtual
+ connection link table.
+
+ Each ATM connection endpoint is described in the atmVclTable. A
+ connection between two ATM endpoints is described by an entry in the
+ ATM VCL cross-connect table atmVcCrossConnectTable. The
+ atmVclCrossConnectIdentifier object of each endpoint points to the
+ atmVcCrossConnectTable row for the connection.
+
+ In the case of an inter-worked connection, the
+ atmVclCrossConnectIdentifier object is set to zero. Instead, the
+ frAtmIwfVclCrossConnectIdentifier object in the frAtmIwfVclEntry is
+ set to the index of the applicable FR/ATM IWF cross-connect table
+ row.
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 6]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ Note that the frAtmIwfVclCrossConnectIdentifier object is defined not
+ in the ATM MIB but in Section 5 of this MIB. Specifically, the
+ object is defined as a column object in a table that AUGMENTs the ATM
+ MIB VCL table.
+
+ The ATM VCL cross-connect table (atmVcCrossConnectTable) does not
+ contain an entry for the inter-worked connection.
+
+ Note that the atmVclCrossConnectIdentifier and
+ frAtmIwfVclCrossConnectIdentifier objects are set by the system as a
+ side-effect of cross-connect establishment. Consequently, these
+ objects are read-only.
+
+3.3.4. IF MIB
+
+ The ifIndex defined in the IF MIB [22] identifies the specific frame
+ relay and ATM endpoint interfaces. The values frAtmIwfConnAtmPort
+ and frAtmIwfConnFrPort are used in this MIB as components in the
+ index list for the frAtmIwfConnectionTable rows.
+
+3.4. Point to Multipoint Considerations
+
+ This MIB supports IWF implementations providing point-to-multipoint
+ functionality. All rows of the cross-connect table indexed by the
+ same frAtmIwfConnIndex MUST utilize the same
+ frAtmIwfConnectionDescriptor value.
+
+ A group of cross-connect table entries indexed by the same
+ frAtmIwfConnIndex value MUST agree on which service the multipoint
+ operation is offered. Two cases are possible:
+
+ (1) Many frame relay PVCs cross-connected to one ATM PVC, or
+
+ (2) One frame relay PVC cross-connected to many ATM PVCs
+
+3.5. Theory of Operation
+
+3.5.1. Creation Process
+
+ Multiple steps are required to create a frame relay to ATM cross-
+ connection. First, rows must be created in the following tables:
+
+ (1) The Frame Relay Service MIB frPVCEndptTable
+
+ (2) The ATM MIB atmVclTable
+
+ (3) The FR/ATM Service IWF MIB frAtmIwfConnectionDescriptorTable
+
+
+
+
+Rehbehn, et al. Standards Track [Page 7]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ (4) The FR/ATM Service IWF MIB frAtmIwfConnectionTable
+
+ Second, the newly created rows are cross-linked.
+
+ Finally, the administrative and operational status objects are set to
+ 'up(1)'.
+
+ A step-by-step example is provided to illustrate the creation
+ process. In this example, the term "Manager" refers to a network
+ management system that issues SNMP protocol actions to an "Agent".
+ The agent is integrated with the system that implements the frame
+ relay to ATM service IWF. In this example, the following cross-
+ connection is created:
+
+ +-----------------------------------+
+ +---------+ | FR/ATM PVC Service IWF |
+ | Frame | | ------------------------------ | +-----------+
+ | Relay | +--------> frAtmIwfConnIndex K <--------+ | ATM |
+ |Endpoint | | | V | | | Endpoint |
+ | ------- | | | | | | | --------- |
+ | DLCI X | | | +------------+ | | |VPI.VCI Q.R|
+ | on |<-+ | | | +->| on |
+ |ifIndex Y| | V | | ifIndex S |
+ +---------+ |frAtmIwfConnectionDescriptorIndex L| +-----------+
+ +-----------------------------------+
+
+ Step 1 - Create the frame relay PVC endpoint
+
+ a) Manager requests creation of a new row in the frPVCEndptTable
+
+ b) Agent receives management request to create a row in
+ frPVCEndptTable for the frame relay side
+
+ c) A new row is created in frPVCEndptTable as follows:
+
+ - frPVCEndptConnectIdentifier initialized to zero
+
+ - frPVCEndptAtmIwfConnIndex initialized to zero
+
+ - remaining row objects initialized as needed for DLCI X on
+ ifIndex Y
+
+ Step 2 - Create the ATM PVC endpoint
+
+ a) Agent receives management request to create a row in atmVclTable
+ for the ATM side
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 8]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ b) A new row is created in atmVclTable and frAtmIwfVclTable (the
+ AUGMENT to the atmVclTable) as follows:
+
+ - atmVclCrossConnectIdentifier initialized to zero
+
+ - frAtmIwfVclCrossConnectIdentifier initialized to zero
+
+ - atmVclConnKind initialized to pvc(1)
+
+ - remaining row objects initialized as needed for VPI.VCI Q.R on
+ ifIndex S
+
+ Step 3 - Create the FR/ATM connection descriptor
+
+ a) If an existing connection descriptor is appropriate for the new
+ connection, go to Step 4 using the selected connection descriptor
+ index value L
+
+ b) Manager requests a new connection descriptor index value by
+ reading frAtmIwfConnectionDescriptorIndexNext from the agent
+
+ c) Agent receives GET request for
+ frAtmIwfConnectionDescriptorIndexNext and responds with the next
+ available value L
+
+ d) Manager requests a new connection descriptor row entry using the
+ value L as the index
+
+ e) Agent receives SET request to create the
+ frAtmIwfConnectionDescriptorTable row entry causes the system to
+ create a row in the table.
+
+ Step 4 - Create the FR/ATM cross-connect
+
+ a) Manager requests a new cross-connect index value by reading
+ frAtmIwfConnIndexNext from the agent
+
+ b) Agent receives GET request for frAtmIwfConnIndexNext and responds
+ with the next available value K
+
+ c) Manager requests a new cross-connect row entry using the value K
+ as the index
+
+ d) Agent receives SET request to create the frAtmIwfConnectionTable
+ row entry (note: the frame relay and ATM PVC endpoints MUST exist
+ and be specified as part of the index fields for the row
+ 'K.S.Q.R.Y.X')
+
+
+
+
+Rehbehn, et al. Standards Track [Page 9]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ e) System creates a row in frAtmIwfConnectionTable for the following
+ indices:
+
+ - frAtmIwfConnIndex of K
+
+ - frAtmIwfConnAtmPort of S
+
+ - frAtmIwfConnVpi of Q
+
+ - frAtmIwfConnVci of R
+
+ - frAtmIwfConnFrPort of Y
+
+ - frAtmIwfConnDlci of X
+
+ - frAtmIwfConnectionDescriptor of L
+
+ Step 5 - The system sets the frame relay PVC endpoint and ATM VCL
+ endpoint to point to the FR/ATM cross-connect row (as a side-effect
+ of Step 4).
+
+ a) System sets frPVCEndptAtmIwfConnIndex to K
+
+ b) System sets frAtmIwfVclCrossConnectIdentifier to K
+
+ Step 6 - Manager signals activation by issuing a SET for the
+ frAtmIwfConnAdminStatus object using the value of 'up(1)'
+
+ Step 7 - Agent receives SET request for frAtmIwfConnAdminStatus and
+ executes internal system mechanisms to activate each PVC segment and
+ the IWF cross-connect. The successful activation permits the agent to
+ respond with 'up(1)' when a GET request is received for the following
+ fields:
+
+ - frAtmIwfConnAtm2FrOperStatus
+
+ - frAtmIwfConnFr2AtmOperStatus
+
+ - atmVclOperStatus (Note: there is no comparable FRS MIB object)
+
+3.5.2. Destruction Process
+
+ Destruction of the frame relay to ATM cross-connection is initiated
+ by the network management system. The agent's processing of the
+ request stimulates implementation-specific system clean-up actions.
+ Following removal of the row in the cross-connection table, the
+ frAtmIwfVclCrossConnectIdentifier in the frAtmIwfVclTable (AUGMENT of
+
+
+
+
+Rehbehn, et al. Standards Track [Page 10]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ the ATM MIB endpoint table) and frPVCEndptAtmIwfConnIndex in the
+ Frame Relay Service MIB endpoint table are both re-initialized to
+ zero.
+
+ A step-by-step example is provided to illustrate the destruction
+ process.
+
+ Step 1 - Manager requests destruction of an existing row in the
+ frAtmIwfConnectionTable by setting frAtmIwfConnRowStatus to
+ destroy(6)
+
+ Step 2 - Agent receives the SET request and performs implementation-
+ specific system clean-up actions for the cross-connection row
+
+ Step 3 - System updates the relevant cross connect information for
+ the frame relay PVC endpoint by setting frPVCEndptAtmIwfConnIndex to
+ 0
+
+ Step 4 - System updates the relevant cross connect information for
+ the ATM PVC endpoint as follows:
+
+ a) System sets frAtmIwfVclCrossConnectIdentifier to 0
+
+ b) System sets atmVclOperStatus to 'down(2)' (Note: there is no
+ comparable FRS MIB object)
+
+ Following the destruction of the FR/ATM cross-connection entry, the
+ manager MAY set the frPVCConnectRowStatus and/or atmVclRowStatus to
+ destroy(6) the associated endpoint entries.
+
+3.5.3. Modification Process
+
+ At the discretion of the agent, a FR/ATM cross-connect may be
+ reconfigured by adding and/or deleting leafs to/from the IWF topology
+ as per the FR/ATM IWF cross-connect creation/destruction procedures.
+ Reconfiguration of traffic/service category parameter values requires
+ release of the FR/ATM IWF cross-connect before those parameter values
+ may be changed for individual frame relay or ATM endpoint segments.
+
+4. Object Definitions
+
+FR-ATM-PVC-SERVICE-IWF-MIB DEFINITIONS ::= BEGIN
+
+IMPORTS
+ MODULE-IDENTITY, OBJECT-TYPE,
+ NOTIFICATION-TYPE,
+ mib-2, Integer32, Counter32 FROM SNMPv2-SMI
+
+
+
+
+Rehbehn, et al. Standards Track [Page 11]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ RowStatus, TimeStamp FROM SNMPv2-TC
+
+ MODULE-COMPLIANCE, OBJECT-GROUP,
+ NOTIFICATION-GROUP FROM SNMPv2-CONF
+
+ AtmVpIdentifier, AtmVcIdentifier FROM ATM-TC-MIB
+
+ atmVclEntry FROM ATM-MIB
+
+ InterfaceIndex FROM IF-MIB;
+
+ frAtmIwfMIB MODULE-IDENTITY
+ LAST-UPDATED "200009280000Z" -- September 28, 2000
+ ORGANIZATION "IETF Frame Relay Service MIB Working Group"
+ CONTACT-INFO
+ "WG Charter:
+ http://www.ietf.org/html.charters/frnetmib-charter
+ WG-email:
+ frnetmib@sunroof.eng.sun.com
+ Subscribe:
+ frnetmib-request@sunroof.eng.sun.com
+ Email Archive:
+ ftp://ftp.ietf.org/ietf-mail-archive/frnetmib
+
+ Chair: Andy Malis
+ Vivace Networks, Inc.
+ Email: Andy.Malis@vivacenetworks.com
+
+ WG editor: Kenneth Rehbehn
+ Megisto Systems, Inc.
+ Email: krehbehn@megisto.com
+
+ Co-author: Orly Nicklass
+ RAD Data Communications Ltd.
+ EMail: orly_n@rad.co.il
+
+ Co-author: George Mouradian
+ AT&T Labs
+ EMail: gvm@att.com"
+
+ DESCRIPTION
+ "The MIB module for monitoring and controlling the
+ Frame Relay/ATM PVC Service Interworking
+ Function."
+
+ --
+ -- Revision History
+ --
+
+
+
+Rehbehn, et al. Standards Track [Page 12]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ REVISION "200009280000Z"
+ DESCRIPTION
+ "Published as RFC 2955"
+
+ ::= { mib-2 86 }
+
+ --
+ -- Object Identifiers
+ --
+ frAtmIwfMIBObjects OBJECT IDENTIFIER
+ ::= { frAtmIwfMIB 1 }
+
+ frAtmIwfTraps OBJECT IDENTIFIER
+ ::= { frAtmIwfMIB 2 }
+ frAtmIwfTrapsPrefix OBJECT IDENTIFIER
+ ::= { frAtmIwfTraps 0 }
+
+ frAtmIwfConformance OBJECT IDENTIFIER
+ ::= { frAtmIwfMIB 3 }
+ frAtmIwfGroups OBJECT IDENTIFIER
+ ::= { frAtmIwfConformance 1 }
+ frAtmIwfCompliances OBJECT IDENTIFIER
+ ::= { frAtmIwfConformance 2 }
+
+ --
+ -- The FR/ATM PVC Service IWF Group
+ --
+ -- The Frame Relay/ATM PVC Service Interworking Function
+ -- Connection Table contains all connections utilizing
+ -- the interworking function.
+ --
+
+ frAtmIwfConnIndexNext OBJECT-TYPE
+ SYNTAX Integer32 (0..2147483647)
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "This object contains an appropriate value to be
+ used for frAtmIwfConnIndex when creating entries
+ in the frAtmIwfConnectionTable. The value 0
+ indicates that no unassigned entries are
+ available. To obtain the frAtmIwfConnIndexNext
+ value for a new entry, the manager issues a
+ management protocol retrieval operation to obtain
+ the current value of this object. After each
+ retrieval, the agent should modify the value to
+ the next unassigned index."
+ ::= { frAtmIwfMIBObjects 1 }
+
+
+
+Rehbehn, et al. Standards Track [Page 13]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ frAtmIwfConnectionTable OBJECT-TYPE
+ SYNTAX SEQUENCE OF FrAtmIwfConnectionEntry
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "A table in which each row represents a Frame
+ Relay/ATM interworking connection."
+ ::= { frAtmIwfMIBObjects 2 }
+
+ frAtmIwfConnectionEntry OBJECT-TYPE
+ SYNTAX FrAtmIwfConnectionEntry
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "The FrAtmIwfConnectionEntry provides an entry for
+ an interworking connection between a frame relay
+ PVC and one or more ATM PVCs, or an ATM PVC and
+ one or more frame relay PVCs. A single frame
+ relay PVC connected to a single ATM PVC is
+ referred to as a `point-to-point' connection and
+ is represented by a single row in the FR/ATM IWF
+ Connection Table. The case of a single frame
+ relay PVC connected to multiple ATM PVCs (or
+ single ATM PVC connected to multiple frame relay
+ PVCs) is referred to as a `point-to-multipoint'
+ connection and is represented by multiple rows in
+ the FR/ATM IWF Connection Table.
+
+ The object frAtmIwfConnIndex uniquely identifies
+ each point-to-point or point-to-multipoint
+ connection. The manager obtains the
+ frAtmIwfConnIndex value by reading the
+ frAtmIwfConnIndexNext object.
+
+ After a frAtmIwfConnIndex is assigned for the
+ connection, the manager creates one or more rows
+ in the Cross Connect Table; one for each cross-
+ connection between the frame relay PVC and an ATM
+ PVC. In the case of `point-to-multipoint'
+ connections, all rows are indexed by the same
+ frAtmIwfConnIndex value and MUST refer to the same
+ frame relay PVC or ATM PVC respectively. An entry
+ can be created only when at least one pair of
+ frame relay and ATM PVCs exist.
+
+ A row can be established by one-step set-request
+ with all required parameter values and
+ frAtmIwfConnRowStatus set to createAndGo(4). The
+
+
+
+Rehbehn, et al. Standards Track [Page 14]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ Agent should perform all error checking as needed.
+ A pair of cross-connected PVCs, as identified by a
+ particular value of the indexes, is released by
+ setting frAtmIwfConnRowStatus to destroy(6). The
+ Agent may release all associated resources. The
+ manager may remove the related PVCs thereafter.
+ Indexes are persistent across reboots of the
+ system."
+ INDEX { frAtmIwfConnIndex,
+ frAtmIwfConnAtmPort,
+ frAtmIwfConnVpi,
+ frAtmIwfConnVci,
+ frAtmIwfConnFrPort,
+ frAtmIwfConnDlci
+ }
+ ::= { frAtmIwfConnectionTable 1 }
+
+ FrAtmIwfConnectionEntry ::=
+ SEQUENCE {
+ frAtmIwfConnIndex Integer32,
+ frAtmIwfConnAtmPort InterfaceIndex,
+ frAtmIwfConnVpi AtmVpIdentifier,
+ frAtmIwfConnVci AtmVcIdentifier,
+ frAtmIwfConnFrPort InterfaceIndex,
+ frAtmIwfConnDlci Integer32,
+ frAtmIwfConnRowStatus RowStatus,
+ frAtmIwfConnAdminStatus INTEGER,
+ frAtmIwfConnAtm2FrOperStatus INTEGER,
+ frAtmIwfConnAtm2FrLastChange TimeStamp,
+ frAtmIwfConnFr2AtmOperStatus INTEGER,
+ frAtmIwfConnFr2AtmLastChange TimeStamp,
+ frAtmIwfConnectionDescriptor Integer32,
+ frAtmIwfConnFailedFrameTranslate Counter32,
+ frAtmIwfConnOverSizedFrames Counter32,
+ frAtmIwfConnFailedAal5PduTranslate Counter32,
+ frAtmIwfConnOverSizedSDUs Counter32,
+ frAtmIwfConnCrcErrors Counter32,
+ frAtmIwfConnSarTimeOuts Counter32
+ }
+
+ frAtmIwfConnIndex OBJECT-TYPE
+ SYNTAX Integer32 (1..2147483647)
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "A unique value for each point-to-point or point-
+ to-multipoint connection. The manager obtains the
+ frAtmIwfConnIndex value by reading the
+
+
+
+Rehbehn, et al. Standards Track [Page 15]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ frAtmIwfConnIndexNext object. A point-to-
+ multipoint connection will be represented in the
+ frAtmIwfConnectionTable with multiple entries that
+ share the same frAtmIwfConnIndex value."
+ ::= { frAtmIwfConnectionEntry 1 }
+
+ frAtmIwfConnAtmPort OBJECT-TYPE
+ SYNTAX InterfaceIndex
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "The index in the ifTable that identifies the ATM
+ port for this interworking connection."
+ ::= { frAtmIwfConnectionEntry 2 }
+
+ frAtmIwfConnVpi OBJECT-TYPE
+ SYNTAX AtmVpIdentifier
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "The VPI of the ATM PVC end point for this
+ interworking connection."
+ ::= { frAtmIwfConnectionEntry 3 }
+
+ frAtmIwfConnVci OBJECT-TYPE
+ SYNTAX AtmVcIdentifier
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "The VCI of the ATM PVC end point for this
+ interworking
+ connection."
+ ::= { frAtmIwfConnectionEntry 4 }
+
+ frAtmIwfConnFrPort OBJECT-TYPE
+ SYNTAX InterfaceIndex
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "The index in the ifTable that identifies the
+ frame relay port for this interworking
+ connection."
+ ::= { frAtmIwfConnectionEntry 5 }
+
+ frAtmIwfConnDlci OBJECT-TYPE
+ SYNTAX Integer32 (16..4194303)
+ MAX-ACCESS not-accessible
+ STATUS current
+
+
+
+Rehbehn, et al. Standards Track [Page 16]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ DESCRIPTION
+ "The DLCI that identifies the frame relay PVC end
+ point for this interworking connection."
+ ::= { frAtmIwfConnectionEntry 6 }
+
+ frAtmIwfConnRowStatus OBJECT-TYPE
+ SYNTAX RowStatus
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "The table row may be created with
+ 'createAndWait(5)' or 'createAndGo(4)'.
+ To activate a connection entry, a valid connection
+ descriptor MUST be established in the
+ frAtmIwfConnectionDescriptor object.
+
+ This object is set to 'destroy(6)' to delete the
+ table row. Before the table row is destroyed, the
+ OperStatus/AdminStatus of the corresponding
+ endpoints MUST be 'down(2)'. The deactivation of
+ the ATM endpoint MAY occur as a side-effect of
+ deleting the FR/ATM IWF cross-connection table
+ row. Otherwise, 'destroy(6)' operation MUST fail
+ (error code 'inconsistentValue')."
+ ::= { frAtmIwfConnectionEntry 7 }
+
+ frAtmIwfConnAdminStatus OBJECT-TYPE
+ SYNTAX INTEGER { up(1), down(2) }
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "The desired operational state for this FR/ATM
+ interworked connection.
+
+ up(1) = Activate the connection. Before the
+ activation can be completed, the
+ OperStatus/AdminStatus of the
+ corresponding endpoints MUST be
+ 'up(1)'. The activation of the
+ corresponding endpoints MAY occur as
+ a side-effect of activating the
+ FR/ATM IWF cross-connection.
+
+ down(2) = Deactivate the connection. Before
+ the deactivation can be completed,
+ the atmVclAdminStatus of the
+ corresponding ATM endpoint MUST be
+ 'down(2)'. The deactivation of the
+
+
+
+Rehbehn, et al. Standards Track [Page 17]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ ATM endpoint MAY occur as a
+ side-effect of deactivating the
+ FR/ATM IWF cross-connection."
+ ::= { frAtmIwfConnectionEntry 8 }
+
+ frAtmIwfConnAtm2FrOperStatus OBJECT-TYPE
+ SYNTAX INTEGER { up(1), down(2) }
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "The current operational state of this
+ interworking connection in the ATM to frame
+ relay direction."
+ ::= { frAtmIwfConnectionEntry 9 }
+
+ frAtmIwfConnAtm2FrLastChange OBJECT-TYPE
+ SYNTAX TimeStamp
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "The value of sysUpTime at the time this
+ interworking connection entered its current
+ operational state in the ATM to FR direction. If
+ the current state was entered prior to the last
+ re-initialization of the local network management
+ subsystem, then this object contains a zero
+ value."
+ ::= { frAtmIwfConnectionEntry 10 }
+
+ frAtmIwfConnFr2AtmOperStatus OBJECT-TYPE
+ SYNTAX INTEGER { up(1), down(2) }
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "The current operational state of this
+ interworking connection in the frame relay
+ to ATM direction."
+ ::= { frAtmIwfConnectionEntry 11 }
+
+ frAtmIwfConnFr2AtmLastChange OBJECT-TYPE
+ SYNTAX TimeStamp
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "The value of sysUpTime at the time this
+ interworking connection entered its current
+ operational state in the FR to ATM direction. If
+ the current state was entered prior to the last
+
+
+
+Rehbehn, et al. Standards Track [Page 18]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ re-initialization of the local network management
+ subsystem, then this object contains a zero
+ value."
+ ::= { frAtmIwfConnectionEntry 12 }
+
+ frAtmIwfConnectionDescriptor OBJECT-TYPE
+ SYNTAX Integer32
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "The value represents a pointer to the relevant
+ descriptor in the IWF descriptor table. An
+ attempt to set this value to an inactive or non-
+ existent row in the Connection Descriptor Table
+ MUST fail (error code 'inconsistentValue')."
+ ::= { frAtmIwfConnectionEntry 13 }
+
+ frAtmIwfConnFailedFrameTranslate OBJECT-TYPE
+ SYNTAX Counter32
+ UNITS "Frames"
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "This object counts the number of frames discarded
+ by the IWF because, while operating in Translation
+ Mode, the IWF is unable to decode the incoming
+ frame payload header according to the mapping
+ rules. (i.e., payload header not recognized by the
+ IWF).
+
+ Frame relay frames are received in the frame relay
+ to ATM direction of the PVC.
+
+ When operating in Transparent Mode, the IWF MUST
+ return noSuchInstance."
+ REFERENCE
+ "FRF.8 [17], Section 5.3.1"
+ ::= { frAtmIwfConnectionEntry 14 }
+
+ frAtmIwfConnOverSizedFrames OBJECT-TYPE
+ SYNTAX Counter32
+ UNITS "Frames"
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "Count of frames discarded by the IWF because the
+ frame is too large to be processed by the AAL5
+ segmentation procedure. Specifically, the frame
+
+
+
+Rehbehn, et al. Standards Track [Page 19]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ does not conform to the size specified in the
+ atmVccAal5CpcsTransmitSduSize object associated
+ with the atmVclEntry at the ATM endpoint.
+ Frame relay frames are received in the frame relay
+ to ATM direction of the PVC."
+ REFERENCE
+ "ATM MIB [21], atmVclTable
+ FRF.8 [17], 5.3.1.4"
+ ::= { frAtmIwfConnectionEntry 15 }
+
+ frAtmIwfConnFailedAal5PduTranslate OBJECT-TYPE
+ SYNTAX Counter32
+ UNITS "PDUs"
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "This attribute counts the number of AAL5 PDUs
+ discarded by the IWF because, while operating in
+ Translation Mode, the IWF is unable to decode the
+ incoming AAL5 PDU payload header according to the
+ mapping rules. (i.e., payload header not
+ recognized by the IWF).
+
+ AAL5 PDUs are received in the ATM to frame relay
+ direction of the PVC.
+
+ When operating in Transparent Mode, the IWF MUST
+ return noSuchInstance."
+ REFERENCE
+ "FRF.8 [17], Section 5.3.1"
+ ::= { frAtmIwfConnectionEntry 16 }
+
+ frAtmIwfConnOverSizedSDUs OBJECT-TYPE
+ SYNTAX Counter32
+ UNITS "SDUs"
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "Count of AAL5 SDUs discarded by the IWF because
+ the SDU is too large to be forwarded on the frame
+ relay segment of the connection. Specifically,
+ the frame does not conform to the size specified
+ in the frLportFragSize object of the FRS MIB [19].
+
+ AAL5 PDUs are received in the ATM to frame relay
+ direction of the PVC."
+ REFERENCE
+ "FRS MIB [19], frLportTable
+
+
+
+Rehbehn, et al. Standards Track [Page 20]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ FRF.8 [17], 5.3.1.4"
+ ::= { frAtmIwfConnectionEntry 17 }
+
+ frAtmIwfConnCrcErrors OBJECT-TYPE
+ SYNTAX Counter32
+ UNITS "PDUs"
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "The number of AAL5 CPCS PDUs received with CRC-32
+ errors on this AAL5 VCC at the IWF.
+
+ AAL5 PDUs are received in the ATM to frame relay
+ direction of the PVC."
+ REFERENCE
+ "ATM MIB [21], atmVclTable"
+ ::= { frAtmIwfConnectionEntry 18 }
+
+ frAtmIwfConnSarTimeOuts OBJECT-TYPE
+ SYNTAX Counter32
+ UNITS "PDUs"
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "The number of partially re-assembled AAL5 CPCS
+ PDUs which were discarded on this AAL5 VCC at the
+ IWF because they were not fully re-assembled
+ within the required time period. If the re-
+ assembly timer is not supported, then this object
+ contains a zero value.
+
+ AAL5 PDUs are received in the ATM to frame relay
+ direction of the PVC."
+ REFERENCE
+ "ATM MIB [21], atmVclTable"
+ ::= { frAtmIwfConnectionEntry 19 }
+
+ --
+ -- The FR/ATM PVC Service IWF Connection Descriptor Group
+ --
+ -- The Frame Relay/ATM PVC Service Interworking Function
+ -- Connection Descriptor table. A descriptor provides the
+ -- attributes for a type of interworked connection.
+ --
+
+ frAtmIwfConnectionDescriptorIndexNext OBJECT-TYPE
+ SYNTAX Integer32 (0..2147483647)
+ MAX-ACCESS read-only
+
+
+
+Rehbehn, et al. Standards Track [Page 21]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ STATUS current
+ DESCRIPTION
+ "This object contains an appropriate value to be
+ used for frAtmIwfConnectionDescriptorIndex when
+ creating entries in the
+ frAtmIwfConnectionDescriptorTable. The value 0
+ indicates that no unassigned entries are
+ available. To obtain the
+ frAtmIwfConnectionDescriptorIndexNext value for a
+ new entry, the manager issues a management
+ protocol retrieval operation to obtain the current
+ value of this object. After each retrieval, the
+ agent should modify the value to the next
+ unassigned index."
+ ::= { frAtmIwfMIBObjects 3 }
+
+ frAtmIwfConnectionDescriptorTable OBJECT-TYPE
+ SYNTAX SEQUENCE OF FrAtmIwfConnectionDescriptorEntry
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "A table in which each row represents a descriptor
+ for one type of Frame Relay/ATM interworking
+ connection. A descriptor may be assigned to zero
+ or more FR/ATM PVC service IWF connections."
+ ::= { frAtmIwfMIBObjects 4 }
+
+ frAtmIwfConnectionDescriptorEntry OBJECT-TYPE
+ SYNTAX FrAtmIwfConnectionDescriptorEntry
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "An entry for a descriptor in an interworking
+ connection between a frame relay PVC and an ATM
+ PVC."
+ INDEX { frAtmIwfConnectionDescriptorIndex }
+ ::= { frAtmIwfConnectionDescriptorTable 1 }
+
+ FrAtmIwfConnectionDescriptorEntry ::=
+ SEQUENCE {
+ frAtmIwfConnectionDescriptorIndex Integer32,
+ frAtmIwfConnDescriptorRowStatus RowStatus,
+ frAtmIwfConnDeToClpMappingMode INTEGER,
+ frAtmIwfConnClpToDeMappingMode INTEGER,
+ frAtmIwfConnCongestionMappingMode INTEGER,
+ frAtmIwfConnEncapsulationMappingMode INTEGER,
+ frAtmIwfConnEncapsulationMappings BITS,
+ frAtmIwfConnFragAndReassEnabled INTEGER,
+
+
+
+Rehbehn, et al. Standards Track [Page 22]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ frAtmIwfConnArpTranslationEnabled INTEGER
+ }
+
+ frAtmIwfConnectionDescriptorIndex OBJECT-TYPE
+ SYNTAX Integer32 (1..2147483647)
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "A unique value to identify a descriptor in the
+ table "
+ ::= { frAtmIwfConnectionDescriptorEntry 1 }
+
+ frAtmIwfConnDescriptorRowStatus OBJECT-TYPE
+ SYNTAX RowStatus
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "The status of this table row. This object is
+ used to create or delete an entry in the
+ descriptor table.
+
+ Creation of the row requires a row index (see
+ frAtmIwfConnectionDescriptorIndexNext). If not
+ explicitly set or in existence, all other columns
+ of the row will be created and initialized to the
+ default value. During creation, this object MAY
+ be set to 'createAndGo(4)' or 'createAndWait(5)'.
+ The object MUST contain the value 'active(1)'
+ before any connection table entry references the
+ row.
+
+ To destroy a row in this table, this object is set
+ to the 'destroy(6)' action. Row destruction MUST
+ fail (error code 'inconsistentValue') if any
+ connection references the row."
+ ::= { frAtmIwfConnectionDescriptorEntry 2 }
+
+ frAtmIwfConnDeToClpMappingMode OBJECT-TYPE
+ SYNTAX INTEGER {
+ mode1(1),
+ mode2Const0(2),
+ mode2Const1(3)
+ }
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "This object describes which mode of translation
+ is in use for loss priority mapping in the frame
+
+
+
+Rehbehn, et al. Standards Track [Page 23]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ relay to ATM direction.
+
+ mode1(1) = the DE field in the Q.922 core
+ frame shall be mapped to the ATM
+ CLP field of every cell
+ generated by the segmentation
+ process of the AAL5 PDU
+ containing the information of
+ that frame.
+
+ mode2Contst0(2) = the ATM CLP field of every cell
+ generated by the segmentation
+ process of the AAL5 PDU
+ containing the information of
+ that frame shall be set to
+ constant 0.
+
+ mode2Contst1(3) = the ATM CLP field of every cell
+ generated by the segmentation
+ process of the AAL5 PDU
+ containing the information of
+ that frame shall be set to
+ constant 1."
+ REFERENCE
+ "FRF.8 [17], Section 4.2.1"
+ DEFVAL { mode1 }
+ ::= { frAtmIwfConnectionDescriptorEntry 3 }
+
+ frAtmIwfConnClpToDeMappingMode OBJECT-TYPE
+ SYNTAX INTEGER {
+ mode1(1),
+ mode2Const0(2),
+ mode2Const1(3)
+ }
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "This object describes which mode of translation
+ is in use for loss priority mapping in the ATM to
+ frame relay direction.
+
+ mode1(1) = if one or more cells in a frame
+ has its CLP field set, the DE
+ field of the Q.922 core frame
+ should be set.
+
+ mode2Const0(2) = the DE field of the Q.922 core
+ frame should be set to the
+
+
+
+Rehbehn, et al. Standards Track [Page 24]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ constant 0.
+
+ mode2Const1(3) = the DE field of the Q.922 core
+ frame should be set to the
+ constant 1."
+ REFERENCE
+ "FRF.8 [17], Section 4.2.2"
+ DEFVAL { mode1 }
+ ::= { frAtmIwfConnectionDescriptorEntry 4 }
+
+ frAtmIwfConnCongestionMappingMode OBJECT-TYPE
+ SYNTAX INTEGER {
+ mode1(1),
+ mode2(2)
+ }
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "This object describes which mode of translation
+ is in use for forward congestion indication
+ mapping in the frame relay to ATM direction.
+
+ mode1(1) = The FECN field in the Q.922 core frame
+ shall be mapped to the ATM EFCI field
+ of every cell generated by the
+ segmentation process of the AAL5 PDU
+ containing the information of that
+ frame.
+
+ mode2(2) = The FECN field in the Q.922 core frame
+ shall not be mapped to the ATM EFCI
+ field of cells generated by the
+ segmentation process of the AAL5 PDU
+ containing the information of that
+ frame. The EFCI field is always set to
+ 'congestion not experienced'.
+
+ In both of the modes above, if there is congestion
+ in the forward direction in the ATM layer within
+ the IWF, then the IWF can set the EFCI field to
+ 'congestion experienced'."
+ REFERENCE
+ "FRF.8 [17], Section 4.3.1.1"
+ DEFVAL { mode1 }
+ ::= { frAtmIwfConnectionDescriptorEntry 5 }
+
+ frAtmIwfConnEncapsulationMappingMode OBJECT-TYPE
+ SYNTAX INTEGER {
+
+
+
+Rehbehn, et al. Standards Track [Page 25]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ transparentMode(1),
+ translationMode(2),
+ translationModeAll(3)
+ }
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "This object indicates whether the mapping of
+ upper layer protocol encapsulation is enabled on
+ this interworking connection.
+
+ transparentMode(1) = Forward the encapsulations
+ unaltered.
+
+ translationMode(2) = Perform mapping between the
+ two encapsulations due to the
+ incompatibilities of the two
+ methods. Mapping is provided
+ for a subset of the potential
+ encapsulations as itemized in
+ frAtmIwfConnEncapsulationMapp
+ ings.
+
+ translationModeAll(3) = Perform mapping between
+ the two encapsulations due to
+ the incompatibilities of the
+ two methods. All
+ encapsulations are
+ translated."
+ REFERENCE
+ "FRF.8 [17], Section 5.3"
+ DEFVAL { transparentMode }
+ ::= { frAtmIwfConnectionDescriptorEntry 6 }
+
+ frAtmIwfConnEncapsulationMappings OBJECT-TYPE
+ SYNTAX BITS {
+ none (0),
+ bridgedPdus(1),
+ bridged802dot6(2),
+ bPdus(3),
+ routedIp(4),
+ routedOsi(5),
+ otherRouted(6),
+ x25Iso8202(7),
+ q933q2931(8) }
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+
+
+
+Rehbehn, et al. Standards Track [Page 26]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ "If upper layer protocol encapsulation mapping is
+ enabled on this interworking connection, then this
+ attribute enumerates which of the encapsulation
+ mappings are supported.
+
+ none(0) = Transparent mode operation
+ bridgedPdus(1) = PID: 0x00-01,-07,-02 or -08
+ bridged802dot6(2) = PID: 0x00-0B
+ bPdus(3) = PID: 0x00-0E or -0F
+ routedIp(4) = NLPID: OxCC
+ routedOsi(5) = NLPID: Ox81, 0x82 or 0x83
+ otherRouted(6) = Other routed protocols
+ x25Iso8202(7) = X25
+ q933q2931(8) = Q.933 and Q.2931"
+ REFERENCE
+ "FRF.8 [17], Section 5.3.1"
+ DEFVAL { { none } }
+ ::= { frAtmIwfConnectionDescriptorEntry 7 }
+
+ frAtmIwfConnFragAndReassEnabled OBJECT-TYPE
+ SYNTAX INTEGER { enabled(1), disabled(2)}
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "The attribute indicates whether fragmentation and
+ reassembly is enabled for this connection."
+ REFERENCE
+ "FRF.8 [17], Section 5.3.1.4"
+ DEFVAL { disabled }
+ ::= { frAtmIwfConnectionDescriptorEntry 8 }
+
+ frAtmIwfConnArpTranslationEnabled OBJECT-TYPE
+ SYNTAX INTEGER { enabled(1), disabled(2)}
+ MAX-ACCESS read-create
+ STATUS current
+ DESCRIPTION
+ "The attribute indicates whether ARP translation
+ is enabled for this connection."
+ REFERENCE
+ "FRF.8 [17], Section 5.4"
+ DEFVAL { disabled }
+ ::= { frAtmIwfConnectionDescriptorEntry 9 }
+
+ --
+ -- Augmentation of ATM MIB VCL Endpoint Table (atmVclTable)
+ --
+ frAtmIwfVclTable OBJECT-TYPE
+ SYNTAX SEQUENCE OF FrAtmIwfVclEntry
+
+
+
+Rehbehn, et al. Standards Track [Page 27]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "The FR/ATM IWF VCL Table augments the ATM MIB VCL
+ Endpoint table."
+ ::= { frAtmIwfMIBObjects 5 }
+
+ frAtmIwfVclEntry OBJECT-TYPE
+ SYNTAX FrAtmIwfVclEntry
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "Entries in this table are created only by the
+ agent. One entry exists for each ATM VCL managed
+ by the agent."
+ AUGMENTS { atmVclEntry }
+ ::= { frAtmIwfVclTable 1 }
+
+ FrAtmIwfVclEntry ::= SEQUENCE {
+ frAtmIwfVclCrossConnectIdentifier Integer32
+ }
+
+ frAtmIwfVclCrossConnectIdentifier OBJECT-TYPE
+ SYNTAX Integer32 (1..2147483647)
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "This object contains the index value of the
+ FR/ATM cross-connect table entry used to link the
+ ATM VCL with a frame relay PVC.
+
+ Each row of the atmVclTable that is not cross-
+ connected with a frame relay PVC MUST return the
+ value zero when this object is read.
+
+ In the case of (frame relay) point to (ATM)
+ multipoint, multiple ATM VCLs will have the same
+ value of this object, and all their cross-
+ connections are identified by entries that are
+ indexed by the same value of
+ frAtmIwfVclCrossConnectIdentifier in the
+ frAtmIwfConnectionTable of this MIB module.
+
+ The value of this object is initialized by the
+ agent after the associated entries in the
+ frAtmIwfConnectionTable have been created."
+ ::= { frAtmIwfVclEntry 1 }
+
+
+
+
+Rehbehn, et al. Standards Track [Page 28]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ --
+ -- Frame Relay/ATM PVC Service Interworking NOTIFICATION
+ --
+
+ frAtmIwfConnStatusChange NOTIFICATION-TYPE
+ OBJECTS { frAtmIwfConnAdminStatus,
+ frAtmIwfConnAtm2FrOperStatus,
+ frAtmIwfConnFr2AtmOperStatus
+ }
+ STATUS current
+ DESCRIPTION
+ "An indication that the status of this
+ interworking connection has changed."
+ ::= { frAtmIwfTrapsPrefix 1 }
+
+ --
+ -- Conformance Information
+ --
+
+ --
+ -- Compliance Statement For Equipment
+ --
+
+ frAtmIwfEquipmentCompliance MODULE-COMPLIANCE
+ STATUS current
+ DESCRIPTION
+ "The compliance statement for equipment that
+ implements the FR/ATM Interworking MIB."
+
+ MODULE -- this module
+ MANDATORY-GROUPS { frAtmIwfBasicGroup,
+ frAtmIwfConnectionDescriptorGroup,
+ frAtmIwfAtmVclTableAugmentGroup,
+ frAtmIwfNotificationsGroup }
+
+ OBJECT frAtmIwfConnDeToClpMappingMode
+ SYNTAX INTEGER { mode1(1) }
+ DESCRIPTION
+ "Only support for Mode 1 is REQUIRED."
+
+ OBJECT frAtmIwfConnClpToDeMappingMode
+ SYNTAX INTEGER { mode1(1) }
+ DESCRIPTION
+ "Only support for Mode 1 is REQUIRED."
+
+ OBJECT frAtmIwfConnCongestionMappingMode
+ SYNTAX INTEGER { mode1(1) }
+ DESCRIPTION
+
+
+
+Rehbehn, et al. Standards Track [Page 29]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ "Only support for Mode 1 is REQUIRED."
+
+ OBJECT frAtmIwfConnEncapsulationMappingMode
+ SYNTAX INTEGER { transparentMode(1) }
+ DESCRIPTION
+ "Support for Translation Mode is OPTIONAL."
+
+ OBJECT frAtmIwfConnEncapsulationMappings
+ SYNTAX BITS { none(0) }
+ DESCRIPTION
+ "The IWF may provide one, some or none of the
+ encapsulation translations defined in section
+ 5.3.1 of FRF.8 [17]."
+
+ OBJECT frAtmIwfConnFragAndReassEnabled
+ SYNTAX INTEGER { disabled(2) }
+ DESCRIPTION
+ "Only support for Mode 1 is REQUIRED."
+
+ OBJECT frAtmIwfConnArpTranslationEnabled
+ SYNTAX INTEGER { disabled(2) }
+ DESCRIPTION
+ "Support for ARP Translation is NOT REQUIRED."
+
+ ::= { frAtmIwfCompliances 1 }
+
+ --
+ -- Compliance Statement For Service (CNM Interface)
+ --
+
+ frAtmIwfServiceCompliance MODULE-COMPLIANCE
+ STATUS current
+ DESCRIPTION
+ "The compliance statement for a CNM interface that
+ implements the FR/ATM Interworking MIB."
+
+ MODULE -- this module
+ MANDATORY-GROUPS { frAtmIwfBasicGroup,
+ frAtmIwfConnectionDescriptorGroup,
+ frAtmIwfAtmVclTableAugmentGroup,
+ frAtmIwfNotificationsGroup }
+
+ --
+ -- Exceptions for each object type implemented for a
+ -- CNM view of the FR/ATM Interworking MIB
+ --
+ OBJECT frAtmIwfConnAdminStatus
+ MIN-ACCESS read-only
+
+
+
+Rehbehn, et al. Standards Track [Page 30]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ DESCRIPTION
+ "Write access is not REQUIRED."
+
+ OBJECT frAtmIwfConnDeToClpMappingMode
+ SYNTAX INTEGER { mode1(1) }
+ MIN-ACCESS read-only
+ DESCRIPTION
+ "Support for Mode 1 is REQUIRED. Other modes are
+ OPTIONAL. Write access is NOT REQUIRED."
+
+ OBJECT frAtmIwfConnClpToDeMappingMode
+ SYNTAX INTEGER { mode1(1) }
+ MIN-ACCESS read-only
+ DESCRIPTION
+ "Support for Mode 1 is REQUIRED. Other modes are
+ OPTIONAL. Write access is NOT REQUIRED."
+
+ OBJECT frAtmIwfConnCongestionMappingMode
+ SYNTAX INTEGER { mode1(1) }
+ MIN-ACCESS read-only
+ DESCRIPTION
+ "Support for Mode 1 is REQUIRED. Other modes are
+ OPTIONAL. Write access is NOT REQUIRED."
+
+ OBJECT frAtmIwfConnEncapsulationMappingMode
+ SYNTAX INTEGER { transparentMode(1) }
+ MIN-ACCESS read-only
+ DESCRIPTION
+ "Support for Transparent Mode is REQUIRED.
+ Translation Mode is OPTIONAL. Write access is not
+ required."
+
+ OBJECT frAtmIwfConnEncapsulationMappings
+ SYNTAX BITS { none(0) }
+ MIN-ACCESS read-only
+ DESCRIPTION
+ "The IWF may provide one, some or none of the
+ encapsulation translations defined in section
+ 5.3.1 of FRF.8 [17]. Write access is not
+ required."
+
+ OBJECT frAtmIwfConnFragAndReassEnabled
+ SYNTAX INTEGER { disabled(2) }
+ MIN-ACCESS read-only
+ DESCRIPTION
+ "Support for Fragmentation and Reassembly is NOT
+ REQUIRED. Write access is not required."
+
+
+
+
+Rehbehn, et al. Standards Track [Page 31]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ OBJECT frAtmIwfConnArpTranslationEnabled
+ SYNTAX INTEGER { disabled(2) }
+ MIN-ACCESS read-only
+ DESCRIPTION
+ "Support for ARP Translation is not required.
+ Write access is not required."
+
+ OBJECT frAtmIwfConnRowStatus
+ MIN-ACCESS read-only
+ DESCRIPTION
+ "Write access is not required."
+
+ ::= { frAtmIwfCompliances 2 }
+
+ --
+ -- Units of Conformance
+ --
+
+ --
+ -- Basic FR/ATM IWF PVC Connection Group
+ --
+ frAtmIwfBasicGroup OBJECT-GROUP
+ OBJECTS { frAtmIwfConnIndexNext,
+ frAtmIwfConnAdminStatus,
+ frAtmIwfConnAtm2FrOperStatus,
+ frAtmIwfConnAtm2FrLastChange,
+ frAtmIwfConnFr2AtmOperStatus,
+ frAtmIwfConnFr2AtmLastChange,
+ frAtmIwfConnectionDescriptor,
+ frAtmIwfConnFailedFrameTranslate,
+ frAtmIwfConnOverSizedFrames,
+ frAtmIwfConnFailedAal5PduTranslate,
+ frAtmIwfConnOverSizedSDUs,
+ frAtmIwfConnCrcErrors,
+ frAtmIwfConnSarTimeOuts,
+ frAtmIwfConnRowStatus }
+ STATUS current
+ DESCRIPTION
+ "The collection of basic objects for configuration
+ and control of FR/ATM interworking connections."
+ ::= { frAtmIwfGroups 1 }
+
+ --
+ -- FR/ATM IWF PVC Connection Descriptor Group
+ --
+
+ frAtmIwfConnectionDescriptorGroup OBJECT-GROUP
+ OBJECTS {
+
+
+
+Rehbehn, et al. Standards Track [Page 32]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ frAtmIwfConnectionDescriptorIndexNext,
+ frAtmIwfConnDeToClpMappingMode,
+ frAtmIwfConnClpToDeMappingMode,
+ frAtmIwfConnCongestionMappingMode,
+ frAtmIwfConnEncapsulationMappingMode,
+ frAtmIwfConnEncapsulationMappings,
+ frAtmIwfConnFragAndReassEnabled,
+ frAtmIwfConnArpTranslationEnabled,
+ frAtmIwfConnDescriptorRowStatus
+ }
+ STATUS current
+ DESCRIPTION
+ "The collection of basic objects for specification
+ of FR/ATM interworking connection descriptors."
+ ::= { frAtmIwfGroups 2 }
+
+ --
+ -- ATM MIB VCL Endpoint Table Augmentation Group
+ --
+
+ frAtmIwfAtmVclTableAugmentGroup OBJECT-GROUP
+ OBJECTS {
+ frAtmIwfVclCrossConnectIdentifier
+ }
+ STATUS current
+ DESCRIPTION
+ "The ATM MIB VCL Endpoint Table AUGMENT object
+ contained in the FR/ATM PVC Service Interworking
+ MIB."
+ ::= { frAtmIwfGroups 3 }
+
+ --
+ -- Notification Group
+ --
+
+ frAtmIwfNotificationsGroup NOTIFICATION-GROUP
+ NOTIFICATIONS { frAtmIwfConnStatusChange }
+ STATUS current
+ DESCRIPTION
+ "The notification for FR/ATM interworking status
+ change."
+ ::= { frAtmIwfGroups 4 }
+ END
+
+
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 33]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+8. Acknowledgments
+
+ This document was produced by the Frame Relay Service MIB Working
+ Group.
+
+ The Editors thank Bert Wijnen, Kaj Tesink, Keith McCloghrie, and
+ David Perkins for providing many helpful comments and suggestions.
+
+9. References
+
+ [1] Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture for
+ Describing SNMP Management Frameworks", RFC 2571, April 1999.
+
+ [2] Rose, M. and K. McCloghrie, "Structure and Identification of
+ Management Information for TCP/IP-based Internets", STD 16, RFC
+ 1155, May 1990.
+
+ [3] Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16,
+ RFC 1212, March 1991.
+
+ [4] Rose, M., "A Convention for Defining Traps for use with the
+ SNMP", RFC 1215, March 1991.
+
+ [5] 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.
+
+ [6] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose,
+ M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58,
+ RFC 2579, April 1999.
+
+ [7] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose,
+ M. and S. Waldbusser, "Conformance Statements for SMIv2", STD
+ 58, RFC 2580, April 1999.
+
+ [8] Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple
+ Network Management Protocol", STD 15, RFC 1157, May 1990.
+
+ [9] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
+ "Introduction to Community-based SNMPv2", RFC 1901, January
+ 1996.
+
+ [10] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Transport
+ Mappings for Version 2 of the Simple Network Management Protocol
+ (SNMPv2)", RFC 1906, January 1996.
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 34]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ [11] Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message
+ Processing and Dispatching for the Simple Network Management
+ Protocol (SNMP)", RFC 2572, April 1999.
+
+ [12] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM)
+ for version 3 of the Simple Network Management Protocol
+ (SNMPv3)", RFC 2574, April 1999.
+
+ [13] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Protocol
+ Operations for Version 2 of the Simple Network Management
+ Protocol (SNMPv2)", RFC 1905, January 1996.
+
+ [14] Levi, D., Meyer, P. and B. Stewart, "SNMPv3 Applications", RFC
+ 2573, April 1999.
+
+ [15] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access
+ Control Model (VACM) for the Simple Network Management Protocol
+ (SNMP)", RFC 2575, April 1999.
+
+ [16] Case, J., Mundy, R., Partain, D. and B. Stewart, "Introduction
+ to Version 3 of the Internet-standard Network Management
+ Framework", RFC 2570, April 1999.
+
+ [17] Frame Relay/ATM PVC Service Interworking Implementation
+ Agreement, Frame Relay Forum, Document Number FRF.8.1, March,
+ 2000.
+
+ [18] Noto, M., Spiegel, E. and K. Tesink, "Definitions of Textual
+ Conventions and OBJECT-IDENTITIES for ATM Management", RFC 2514,
+ February 1999.
+
+ [19] Rehbehn, K. and D. Fowler, "Definitions of Managed Objects for
+ Frame Relay Service", RFC 2954, October 2000.
+
+ [20] Frame Relay/ATM PVC Network Interworking Implementation
+ Agreement, Frame Relay Forum, Document Number FRF.5, December
+ 20, 1994.
+
+ [21] Tesink, K., "Definitions of Managed Objects for ATM Management",
+ RFC 2515, February 1999.
+
+ [22] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB",
+ RFC 2863, June 2000.
+
+ [23] Bradner, S., "Key words for use in RFCs to Indicate Requirement
+ Levels", BCP 14, RFC 2119, March 1997.
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 35]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+ [24] Brown, C. and F. Baker, "Management Information Base for Frame
+ Relay DTEs Using SMIv2", RFC 2115, September 1997.
+
+10. Security Considerations
+
+ There are a number of management objects defined in this MIB that
+ have 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.
+
+ No managed objects in this MIB contain sensitive information.
+
+ SNMPv1 by itself is not a secure environment. 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.
+
+ It is recommended that the implementers consider the security
+ features as provided by the SNMPv3 framework. Specifically, the use
+ of the User-based Security Model RFC 2574 [12] and the View-based
+ Access Control Model RFC 2575 [15] is recommended.
+
+ It is then a customer/user responsibility to ensure that the SNMP
+ entity giving access to an instance of this MIB, 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.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 36]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+11. Authors' Addresses
+
+ Kenneth Rehbehn
+ Megisto Systems, Inc.
+ 20251 Century Boulevard
+ Germantown, MD, USA 20874
+
+ Phone: +1 (301) 515-3672
+ EMail: krehbehn@megisto.com
+
+
+ Orly Nicklass
+ RAD Data Communications, Ltd.
+ 12 Hanechoshet St.
+ Tel Aviv 69710
+ Israel
+
+ Phone: +972 (3) 6459588
+ EMail: orly_n@rad.co.il
+
+
+ George Mouradian
+ AT&T Labs, Room 1G-325
+ 101 Crawfords Corner Road
+ Holmdel, NJ USA 07733
+
+ Phone: +1 908 949 7671
+ EMail: gvm@att.com
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 37]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+12. Intellectual Property Rights
+
+ The IETF takes no position regarding the validity or scope of any
+ intellectual property 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; neither does it represent that it
+ has made any effort to identify any such rights. Information on the
+ IETF's procedures with respect to rights in standards-track and
+ standards-related documentation can be found in BCP-11. Copies of
+ claims of rights made available for publication 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 implementors or users of this specification can
+ be obtained from the IETF Secretariat.
+
+ The IETF invites any interested party to bring to its attention any
+ copyrights, patents or patent applications, or other proprietary
+ rights which may cover technology that may be required to practice
+ this standard. Please address the information to the IETF Executive
+ Director.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 38]
+
+RFC 2955 FR to ATM Service Interworking MIB October 2000
+
+
+13. Full Copyright Statement
+
+ Copyright (C) The Internet Society (2000). All Rights Reserved.
+
+ This document and translations of it may be copied and furnished to
+ others, and derivative works that comment on or otherwise explain it
+ or assist in its implementation may be prepared, copied, published
+ and distributed, in whole or in part, without restriction of any
+ kind, provided that the above copyright notice and this paragraph are
+ included on all such copies and derivative works. However, this
+ document itself may not be modified in any way, such as by removing
+ the copyright notice or references to the Internet Society or other
+ Internet organizations, except as needed for the purpose of
+ developing Internet standards in which case the procedures for
+ copyrights defined in the Internet Standards process must be
+ followed, or as required to translate it into languages other than
+ English.
+
+ The limited permissions granted above are perpetual and will not be
+ revoked by the Internet Society or its successors or assigns.
+
+ This document and the information contained herein is provided on an
+ "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
+ TASK FORCE DISCLAIMS 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 WARRANTIES OF
+ MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+
+Acknowledgement
+
+ Funding for the RFC Editor function is currently provided by the
+ Internet Society.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Rehbehn, et al. Standards Track [Page 39]
+