RADIUS Accounting Client MIB for IPv6
draft-ietf-radext-rfc2620bis-04

Network Working Group                                          D. Nelson
Internet-Draft                                        Enterasys Networks
Obsoletes: RFC 2620 (if approved)                          June 26, 2006
Expires: December 28, 2006

                 RADIUS Accounting Client MIB for IPv6
                  draft-ietf-radext-rfc2620bis-04.txt

Status of this Memo

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   This Internet-Draft will expire on December 28, 2006.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This memo defines a set of extensions, which instrument RADIUS
   accounting client functions.  These extensions represent a portion of
   the Management Information Base (MIB) for use with network management
   protocols in the Internet community.  Using these extensions IP-based
   management stations can manage RADIUS accounting clients.

   This memo obsoletes RFC 2620 by deprecating the MIB table containing
   IPv4-only address formats and defining a new table to add support for

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   version neutral IP address formats.  The remaining MIB objects from
   RFC 2620 are carried forward into this document.  This memo also adds
   UNITS and REFERENCE clauses to selected objects.

Table of Contents

   1.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  The Internet-Standard Management Framework . . . . . . . . . .  3
   4.  Scope of Changes . . . . . . . . . . . . . . . . . . . . . . .  3
   5.  Structure of the MIB Module  . . . . . . . . . . . . . . . . .  4
   6.  Deprecated Objects . . . . . . . . . . . . . . . . . . . . . .  5
   7.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  5
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 19
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 19
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 20
     10.1.  Normative References  . . . . . . . . . . . . . . . . . . 20
     10.2.  Informative References  . . . . . . . . . . . . . . . . . 21
   Appendix A.  Acknowledgments . . . . . . . . . . . . . . . . . . . 21
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 22
   Intellectual Property and Copyright Statements . . . . . . . . . . 23

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1.  Terminology

   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 RFC 2119 [RFC2119].

   This document uses terminology from RFC 2866 [RFC2866].

   This document uses the word "malformed" with respect to RADIUS
   packets, particularly in the context of counters of "malformed
   packets".  While RFC 2866 does not provide an explicit definition of
   "malformed", malformed generally means that the implementation has
   determined the packet does not match the format defined in RFC 2866.
   Those implementations are used in deployments today, and thus set the
   de-facto definition of "malformed".

2.  Introduction

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   The objects defined within this memo relate to the Remote
   Authentication Dial-In User Service (RADIUS) Accounting Client as
   defined in RFC 2866 [RFC2866].

3.  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].

4.  Scope of Changes

   This document obsoletes RFC 2620 [RFC2620], RADIUS Authentication
   Client MIB, by deprecating the radiusAuthServerTable table and adding
   a new table, radiusAuthServerExtTable, containing
   radiusAuthServerInetAddressType, radiusAuthServerInetAddress, and

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   radiusAuthClientServerInetPortNumber.  The purpose of these added MIB
   objects is to support version neutral IP addressing formats.  The
   existing table containing radiusAuthServerAddress and
   radiusAuthClientServerPortNumber is deprecated.  The remaining MIB
   objects from RFC 2620 are carried forward into this document.

   RFC 4001 [RFC4001], which defines the SMI Textual Conventions for
   IPv6 addresses, contains the following recommendation.

   'In particular, when revising a MIB module that contains IPv4
   specific tables, it is suggested to define new tables using the
   textual conventions defined in this memo [RFC4001] that support all
   versions of IP.  The status of the new tables SHOULD be "current",
   whereas the status of the old IP version specific tables SHOULD be
   changed to "deprecated".  The other approach, of having multiple
   similar tables for different IP versions, is strongly discouraged.'

5.  Structure of the MIB Module

   The RADIUS accounting protocol, described in RFC 2866 [RFC2866],
   distinguishes between the client function and the server function.
   In RADIUS accounting, clients send Accounting-Requests, and servers
   reply with Accounting-Responses.  Typically Network Access Server
   (NAS) devices implement the client function, and thus would be
   expected to implement the RADIUS accounting client MIB, while RADIUS
   accounting servers implement the server function, and thus would be
   expected to implement the RADIUS accounting server MIB.

   However, it is possible for a RADIUS accounting entity to perform
   both client and server functions.  For example, a RADIUS proxy may
   act as a server to one or more RADIUS accounting clients, while
   simultaneously acting as an accounting client to one or more
   accounting servers.  In such situations, it is expected that RADIUS
   entities combining client and server functionality will support both
   the client and server MIBs.  The client MIB is defined in this
   document, and the server MIB is defined in [2621bis].

   RFC Editor: Replace the above I-D reference with the assigned RFC
   number at the time of publication and delete this note.

   This MIB module contains two scalars as well as a single table, the
   RADIUS Accounting Server Table, which contains one row for each
   RADIUS server with which the client shares a secret.  Each entry in
   the RADIUS Accounting Server Table includes fifteen columns
   presenting a view of the activity of the RADIUS client.

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6.  Deprecated Objects

   The deprecated table in this MIB is carried forward from RFC 2620
   [RFC2620].  There are two conditions under which it MAY be desirable
   for managed entities to continue to support the deprecated table:

   1.  The managed entity only supports IPv4 address formats.
   2.  The managed entity supports both IPv4 and IPv6 address formats,
       and the deprecated table is supported for backwards compatibility
       with older management stations.  This option SHOULD only be used
       when the IP addresses in the new table are in IPv4 format and can
       accurately be represented in both the new table and the
       deprecated table.

   Managed entities SHOULD NOT instantiate row entries in the deprecated
   table, containing IPv4-only address objects, when the RADIUS
   accounting server address represented in such a table row is not an
   IPv4 address.  Managed entities SHOULD NOT return inaccurate values
   of IP address or SNMP object access errors for IPv4-only address
   objects in otherwise populated tables.  When row entries exist in
   both the deprecated IPv4-only table and the new IP version neutral
   table that describe the same RADIUS accounting server, the row
   indexes SHOULD be the same for the corresponding rows in each table,
   to facilitate correlation of these related rows by management
   applications.

7.  Definitions

   RADIUS-ACC-CLIENT-MIB DEFINITIONS ::= BEGIN

   IMPORTS
          MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
          Counter32, Integer32, Gauge32,
          IpAddress, TimeTicks, mib-2      FROM SNMPv2-SMI
          SnmpAdminString                  FROM SNMP-FRAMEWORK-MIB
          InetAddressType, InetAddress,
          InetPortNumber                   FROM INET-ADDRESS-MIB
          MODULE-COMPLIANCE, OBJECT-GROUP  FROM SNMPv2-CONF;

   radiusAccClientMIB MODULE-IDENTITY
          LAST-UPDATED "200605100000Z" -- 10 May 2006
          ORGANIZATION "IETF RADIUS Extensions Working Group."
          CONTACT-INFO
                 " Bernard Aboba
                   Microsoft
                   One Microsoft Way

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                   Redmond, WA  98052
                   US
                   Phone: +1 425 936 6605
                   EMail: bernarda@microsoft.com"
          DESCRIPTION
                "The MIB module for entities implementing the client
                 side of the Remote Authentication Dial-In User Service
                 (RADIUS) accounting protocol.Copyright (C) The
                 Internet Society (2006).  This version of this MIB
                 module is part of RFC xxxx; see the RFC itself for
                 full legal notices."

   -- RFC Editor: replace xxxx with actual RFC number at the time of
   -- publication, and remove this note.

          REVISION "200605100000Z"  -- 10 May 2006
          DESCRIPTION
                "Revised version as published in RFC xxxx.
                 This version obsoletes that of RFC 2620 by
                 deprecating the MIB table containing IPv4-only
                 address formats and defining a new table to add support
                 for version neutral IP address formats. The remaining
                 MIB objects from RFC 2620 are carried forward into this
                 version."

   -- RFC Editor: replace xxxx with actual RFC number at the time of
   -- publication, and remove this note.

          REVISION "199906110000Z"  -- 11 Jun 1999
          DESCRIPTION "Initial version as published in RFC 2620."

         ::= { radiusAccounting 2 }

   radiusMIB OBJECT-IDENTITY
         STATUS  current
         DESCRIPTION
                "The OID assigned to RADIUS MIB work by the IANA."
         ::= { mib-2 67 }

   radiusAccounting  OBJECT IDENTIFIER ::= {radiusMIB 2}

   radiusAccClientMIBObjects     OBJECT IDENTIFIER
         ::= { radiusAccClientMIB 1 }

   radiusAccClient  OBJECT IDENTIFIER
         ::= { radiusAccClientMIBObjects 1 }

   radiusAccClientInvalidServerAddresses OBJECT-TYPE

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         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS Accounting-Response packets
                received from unknown addresses."
         ::= { radiusAccClient 1 }

   radiusAccClientIdentifier OBJECT-TYPE
         SYNTAX SnmpAdminString
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The NAS-Identifier of the RADIUS accounting client.
                This is not necessarily the same as sysName in MIB
                II."
         REFERENCE "RFC 2865 section 5.32"
         ::= { radiusAccClient 2 }

   radiusAccServerTable OBJECT-TYPE
         SYNTAX SEQUENCE OF RadiusAccServerEntry
         MAX-ACCESS not-accessible
         STATUS     deprecated
         DESCRIPTION
               "The (conceptual) table listing the RADIUS accounting
                servers with which the client shares a secret."
         ::= { radiusAccClient 3 }

   radiusAccServerEntry OBJECT-TYPE
         SYNTAX     RadiusAccServerEntry
         MAX-ACCESS not-accessible
         STATUS     deprecated
         DESCRIPTION
               "An entry (conceptual row) representing a RADIUS
                accounting server with which the client shares a
                secret."
         INDEX      { radiusAccServerIndex }
         ::= { radiusAccServerTable 1 }

   RadiusAccServerEntry ::= SEQUENCE {
         radiusAccServerIndex                           Integer32,
         radiusAccServerAddress                         IpAddress,
         radiusAccClientServerPortNumber                Integer32,
         radiusAccClientRoundTripTime                   TimeTicks,
         radiusAccClientRequests                        Counter32,
         radiusAccClientRetransmissions                 Counter32,
         radiusAccClientResponses                       Counter32,

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         radiusAccClientMalformedResponses              Counter32,
         radiusAccClientBadAuthenticators               Counter32,
         radiusAccClientPendingRequests                   Gauge32,
         radiusAccClientTimeouts                        Counter32,
         radiusAccClientUnknownTypes                    Counter32,
         radiusAccClientPacketsDropped                  Counter32
   }

   radiusAccServerIndex OBJECT-TYPE
         SYNTAX     Integer32 (1..2147483647)
         MAX-ACCESS not-accessible
         STATUS     deprecated
         DESCRIPTION
               "A number uniquely identifying each RADIUS
                Accounting server with which this client
                communicates."
         ::= { radiusAccServerEntry 1 }

   radiusAccServerAddress OBJECT-TYPE
         SYNTAX     IpAddress
         MAX-ACCESS read-only
         STATUS     deprecated
         DESCRIPTION
               "The IP address of the RADIUS accounting server
                referred to in this table entry."
         ::= { radiusAccServerEntry 2 }

   radiusAccClientServerPortNumber  OBJECT-TYPE
         SYNTAX Integer32 (0..65535)
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
               "The UDP port the client is using to send requests to
                this server."
         REFERENCE "RFC 2866 section 3"
         ::= { radiusAccServerEntry 3 }

   radiusAccClientRoundTripTime  OBJECT-TYPE
         SYNTAX TimeTicks
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
                "The time interval between the most recent
                Accounting-Response and the Accounting-Request that
                matched it from this RADIUS accounting server."
         REFERENCE "RFC 2866 section 2"
         ::= { radiusAccServerEntry 4 }

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   -- Request/Response statistics
   --
   -- Requests = Responses + PendingRequests + ClientTimeouts
   --
   -- Responses - MalformedResponses - BadAuthenticators -
   -- UnknownTypes - PacketsDropped = Successfully received

   radiusAccClientRequests OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
               "The number of RADIUS Accounting-Request packets
                sent. This does not include retransmissions."
         REFERENCE "RFC 2866 section 4.1"
         ::= { radiusAccServerEntry 5 }

   radiusAccClientRetransmissions OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
               "The number of RADIUS Accounting-Request packets
                retransmitted to this RADIUS accounting server.
                Retransmissions include retries where the
                Identifier and Acct-Delay have been updated, as
                well as those in which they remain the same."
         REFERENCE "RFC 2866 section 2"
         ::= { radiusAccServerEntry 6 }

   radiusAccClientResponses OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
               "The number of RADIUS packets received on the
                accounting port from this server."
         REFERENCE "RFC 2866 section 4.2"
         ::= { radiusAccServerEntry 7 }

   radiusAccClientMalformedResponses OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS deprecated

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         DESCRIPTION
                "The number of malformed RADIUS Accounting-Response
                 packets received from this server. Malformed packets
                include packets with an invalid length. Bad
                authenticators and unknown types are not included as
                malformed accounting responses."
         REFERENCE "RFC 2866 section 3"
         ::= { radiusAccServerEntry 8 }

   radiusAccClientBadAuthenticators OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
               "The number of RADIUS Accounting-Response
                packets which contained invalid authenticators
                received from this server."
         REFERENCE "RFC 2866 section 3"
         ::= { radiusAccServerEntry 9 }

   radiusAccClientPendingRequests OBJECT-TYPE
         SYNTAX Gauge32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
               "The number of RADIUS Accounting-Request packets
                sent to this server that have not yet timed out or
                received a response. This variable is incremented
                when an Accounting-Request is sent and decremented
                due to receipt of an Accounting-Response, a timeout
                or a retransmission."
         REFERENCE "RFC 2866 section 2"
         ::= { radiusAccServerEntry 10 }

   radiusAccClientTimeouts OBJECT-TYPE
        SYNTAX Counter32
        UNITS "timeouts"
        MAX-ACCESS read-only
        STATUS deprecated
        DESCRIPTION
             "The number of accounting timeouts to this server.
              After a timeout the client may retry to the same
              server, send to a different server, or give up.
              A retry to the same server is counted as a
              retransmit as well as a timeout. A send to a different
              server is counted as an Accounting-Request as well as

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              a timeout."
         REFERENCE "RFC 2866 section 2"
         ::= { radiusAccServerEntry  11 }

   radiusAccClientUnknownTypes OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
               "The number of RADIUS packets of unknown type which
                were received from this server on the accounting port."
         REFERENCE "RFC 2866 section 4"
         ::= { radiusAccServerEntry  12 }

   radiusAccClientPacketsDropped OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
               "The number of RADIUS packets which were received from
                this server on the accounting port and dropped for some
                other reason."
         ::= { radiusAccServerEntry  13 }

   -- New MIB objects added in this revision

   radiusAccServerExtTable OBJECT-TYPE
         SYNTAX SEQUENCE OF RadiusAccServerExtEntry
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
               "The (conceptual) table listing the RADIUS accounting
                servers with which the client shares a secret."
         ::= { radiusAccClient 4 }

   radiusAccServerExtEntry OBJECT-TYPE
         SYNTAX     RadiusAccServerExtEntry
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
               "An entry (conceptual row) representing a RADIUS
                accounting server with which the client shares a
                secret."
         INDEX      { radiusAccServerExtIndex }
         ::= { radiusAccServerExtTable 1 }

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   RadiusAccServerExtEntry ::= SEQUENCE {
         radiusAccServerExtIndex                    Integer32,
         radiusAccServerInetAddressType             InetAddressType,
         radiusAccServerInetAddress                 InetAddress,
         radiusAccClientServerInetPortNumber        InetPortNumber,
         radiusAccClientExtRoundTripTime            TimeTicks,
         radiusAccClientExtRequests                 Counter32,
         radiusAccClientExtRetransmissions          Counter32,
         radiusAccClientExtResponses                Counter32,
         radiusAccClientExtMalformedResponses       Counter32,
         radiusAccClientExtBadAuthenticators        Counter32,
         radiusAccClientExtPendingRequests          Gauge32,
         radiusAccClientExtTimeouts                 Counter32,
         radiusAccClientExtUnknownTypes             Counter32,
         radiusAccClientExtPacketsDropped           Counter32,
         radiusAccClientCounterDiscontinuity        TimeTicks
   }

   radiusAccServerExtIndex OBJECT-TYPE
         SYNTAX     Integer32 (1..2147483647)
         MAX-ACCESS not-accessible
         STATUS     current
         DESCRIPTION
               "A number uniquely identifying each RADIUS
                Accounting server with which this client
                communicates."
         ::= { radiusAccServerExtEntry 1 }

   radiusAccServerInetAddressType OBJECT-TYPE
            SYNTAX     InetAddressType
            MAX-ACCESS read-only
            STATUS     current
            DESCRIPTION
                  "The type of address format used for the
                   radiusAccServerInetAddress object."
            ::= { radiusAccServerExtEntry 2 }

      radiusAccServerInetAddress OBJECT-TYPE
            SYNTAX     InetAddress
            MAX-ACCESS read-only
            STATUS     current
            DESCRIPTION
                  "The IP address of the RADIUS accounting
                   server referred to in this table entry, using
                   the version neutral IP address format."
            ::= { radiusAccServerExtEntry 3 }

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      radiusAccClientServerInetPortNumber  OBJECT-TYPE
            SYNTAX InetPortNumber ( 1..65535 )
            MAX-ACCESS read-only
            STATUS current
            DESCRIPTION
                  "The UDP port the client is using to send requests
                   to this accounting server. The value zero (0) is
                   invalid."
            REFERENCE "RFC 2866 section 3"
            ::= { radiusAccServerExtEntry 4 }

   radiusAccClientExtRoundTripTime  OBJECT-TYPE
         SYNTAX TimeTicks
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
                "The time interval between the most recent
                Accounting-Response and the Accounting-Request that
                matched it from this RADIUS accounting server."
         REFERENCE "RFC 2866 section 2"
         ::= { radiusAccServerExtEntry 5 }

   -- Request/Response statistics
   --
   -- Requests = Responses + PendingRequests + ClientTimeouts
   --
   -- Responses - MalformedResponses - BadAuthenticators -
   -- UnknownTypes - PacketsDropped = Successfully received

   radiusAccClientExtRequests OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS Accounting-Request packets
                sent. This does not include retransmissions.
                This counter may experience a discontinuity when the
                RADIUS Accounting Client module within the managed
                entity is reinitialized, as indicated by the current
                value of radiusAccClientCounterDiscontinuity."
         REFERENCE "RFC 2866 section 4.1"
         ::= { radiusAccServerExtEntry 6 }

   radiusAccClientExtRetransmissions OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"

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         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS Accounting-Request packets
                retransmitted to this RADIUS accounting server.
                Retransmissions include retries where the
                Identifier and Acct-Delay have been updated, as
                well as those in which they remain the same.
                This counter may experience a discontinuity when the
                RADIUS Accounting Client module within the managed
                entity is reinitialized, as indicated by the current
                value of radiusAccClientCounterDiscontinuity."
         REFERENCE "RFC 2866 section 2"
         ::= { radiusAccServerExtEntry 7 }

   radiusAccClientExtResponses OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS packets received on the
                accounting port from this server.  This counter
                may experience a discontinuity when the RADIUS
                Accounting Client module within the managed entity is
                reinitialized, as indicated by the current value of
                radiusAccClientCounterDiscontinuity."
         REFERENCE "RFC 2866 section 4.2"
         ::= { radiusAccServerExtEntry 8 }

   radiusAccClientExtMalformedResponses OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of malformed RADIUS Accounting-Response
                packets received from this server. Malformed packets
                include packets with an invalid length. Bad
                authenticators and unknown types are not included as
                malformed accounting responses.  This counter may
                experience a discontinuity when the RADIUS Accounting
                Client module within the managed entity is
                reinitialized, as indicated by the current
                value of radiusAccClientCounterDiscontinuity."
         REFERENCE "RFC 2866 section 3"
         ::= { radiusAccServerExtEntry 9 }

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   radiusAccClientExtBadAuthenticators OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS Accounting-Response
                packets which contained invalid authenticators
                received from this server.  This counter may
                experience a discontinuity when the RADIUS
                Accounting Client module within the managed
                entity is reinitialized, as indicated by the
                current value of
                radiusAccClientCounterDiscontinuity."
         REFERENCE "RFC 2866 section 3"
         ::= { radiusAccServerExtEntry 10 }

   radiusAccClientExtPendingRequests OBJECT-TYPE
         SYNTAX Gauge32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS Accounting-Request packets
                sent to this server that have not yet timed out or
                received a response. This variable is incremented
                when an Accounting-Request is sent and decremented
                due to receipt of an Accounting-Response, a timeout
                or a retransmission.  This counter may experience a
                discontinuity when the RADIUS Accounting Client module
                within the managed entity is reinitialized, as
                indicated by the current value of
                radiusAccClientCounterDiscontinuity."
         REFERENCE "RFC 2866 section 2"
         ::= { radiusAccServerExtEntry 11 }

   radiusAccClientExtTimeouts OBJECT-TYPE
        SYNTAX Counter32
        UNITS "timeouts"
        MAX-ACCESS read-only
        STATUS current
        DESCRIPTION
             "The number of accounting timeouts to this server.
              After a timeout the client may retry to the same
              server, send to a different server, or give up.
              A retry to the same server is counted as a
              retransmit as well as a timeout. A send to a different
              server is counted as an Accounting-Request as well as

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              a timeout.  This counter may experience a discontinuity
              when the RADIUS Accounting Client module within the
              managed entity is reinitialized, as indicated by the
              current value of radiusAccClientCounterDiscontinuity."
         REFERENCE "RFC 2866 section 2"
         ::= { radiusAccServerExtEntry  12 }

   radiusAccClientExtUnknownTypes OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS packets of unknown type which
                were received from this server on the accounting port.
                This counter may experience a discontinuity when the
                RADIUS Accounting Client module within the managed
                entity is reinitialized, as indicated by the current
                value of radiusAccClientCounterDiscontinuity."
         REFERENCE "RFC 2866 section 4"
         ::= { radiusAccServerExtEntry  13 }

   radiusAccClientExtPacketsDropped OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS packets which were received from
                this server on the accounting port and dropped for some
                other reason.  This counter may experience a
                discontinuity when the RADIUS Accounting Client module
                within the managed entity is reinitialized, as indicated
                by the current value of
                radiusAccClientCounterDiscontinuity."
         ::= { radiusAccServerExtEntry  14 }

   radiusAccClientCounterDiscontinuity OBJECT-TYPE
            SYNTAX TimeTicks
            UNITS "centiseconds"
            MAX-ACCESS read-only
            STATUS current
            DESCRIPTION
                  "The number of centiseconds since the last
                   discontinuity in the RADIUS Accounting Client
                   counters.  A discontinuity may be the result of a
                   reinitialization of the RADIUS Accounting Client
                   module within the managed entity."

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            ::= { radiusAccServerExtEntry 15 }

   -- conformance information

   radiusAccClientMIBConformance  OBJECT IDENTIFIER
         ::= { radiusAccClientMIB 2 }

   radiusAccClientMIBCompliances  OBJECT IDENTIFIER
         ::= { radiusAccClientMIBConformance 1 }

   radiusAccClientMIBGroups  OBJECT IDENTIFIER
         ::= { radiusAccClientMIBConformance 2 }

   -- units of conformance

   radiusAccClientMIBCompliance MODULE-COMPLIANCE
        STATUS  deprecated
        DESCRIPTION
              "The compliance statement for accounting clients
               implementing the RADIUS Accounting Client MIB.
               Implementation of this module is for IPv4-only
               entities, or for backwards compatibility use with
               entities that support both IPv4 and IPv6."
        MODULE  -- this module
            MANDATORY-GROUPS { radiusAccClientMIBGroup }

        ::= { radiusAccClientMIBCompliances 1 }

   radiusAccClientExtMIBCompliance MODULE-COMPLIANCE
        STATUS  current
        DESCRIPTION
              "The compliance statement for accounting
               clients implementing the RADIUS Accounting
               Client IPv6 Extensions MIB.  Implementation of
               this module is for entities that support IPv6,
               or support IPv4 and IPv6."
        MODULE  -- this module
            MANDATORY-GROUPS { radiusAccClientExtMIBGroup }

        OBJECT radiusAccServerInetAddressType
        SYNTAX InetAddressType { ipv4(1), ipv6(2) }
        DESCRIPTION
              "An implementation is only required to support
               IPv4 and globally unique IPv6 addresses."

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        OBJECT radiusAccServerInetAddress
        SYNTAX InetAddress ( SIZE (4|16) )
        DESCRIPTION
              "An implementation is only required to support
               IPv4 and globally unique IPv6 addresses."

        ::= { radiusAccClientMIBCompliances 2 }

   -- units of conformance

   radiusAccClientMIBGroup OBJECT-GROUP
        OBJECTS { radiusAccClientIdentifier,
                  radiusAccClientInvalidServerAddresses,
                  radiusAccServerAddress,
                  radiusAccClientServerPortNumber,
                  radiusAccClientRoundTripTime,
                  radiusAccClientRequests,
                  radiusAccClientRetransmissions,
                  radiusAccClientResponses,
                  radiusAccClientMalformedResponses,
                  radiusAccClientBadAuthenticators,
                  radiusAccClientPendingRequests,
                  radiusAccClientTimeouts,
                  radiusAccClientUnknownTypes,
                  radiusAccClientPacketsDropped
            }
        STATUS  deprecated
        DESCRIPTION
              "The basic collection of objects providing management of
               RADIUS Accounting Clients."
        ::= { radiusAccClientMIBGroups 1 }

   radiusAccClientExtMIBGroup OBJECT-GROUP
        OBJECTS { radiusAccClientIdentifier,
                  radiusAccClientInvalidServerAddresses,
                  radiusAccServerInetAddressType,
                  radiusAccServerInetAddress,
                  radiusAccClientServerInetPortNumber,
                  radiusAccClientExtRoundTripTime,
                  radiusAccClientExtRequests,
                  radiusAccClientExtRetransmissions,
                  radiusAccClientExtResponses,
                  radiusAccClientExtMalformedResponses,
                  radiusAccClientExtBadAuthenticators,
                  radiusAccClientExtPendingRequests,
                  radiusAccClientExtTimeouts,

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                  radiusAccClientExtUnknownTypes,
                  radiusAccClientExtPacketsDropped,
                  radiusAccClientCounterDiscontinuity
            }
        STATUS  current
        DESCRIPTION
              "The basic collection of objects providing management of
               RADIUS Accounting Clients."
        ::= { radiusAccClientMIBGroups 2 }

   END

8.  IANA Considerations

   This document requires no new IANA assignments.

9.  Security Considerations

   There are no management objects defined in this MIB that have a MAX-
   ACCESS clause of read-write and/or read-create.  So, if this MIB is
   implemented correctly, then there is no risk that an intruder can
   alter or create any management objects of this MIB via direct SNMP
   SET operations.

   There are a number of managed objects in this MIB that may contain
   sensitive information.  These are:

   radiusAcctServerIPAddress This can be used to determine the address
      of the RADIUS accounting server with which the client is
      communicating.  This information could be useful in mounting an
      attack on the accounting server.

   radiusAcctServerInetAddress This can be used to determine the address
      of the RADIUS accounting server with which the client is
      communicating.  This information could be useful in mounting an
      attack on the accounting server.

   radiusAcctClientServerPortNumber This can be used to determine the
      port number on which the RADIUS accounting client is sending.
      This information could be useful in impersonating the client in
      order to send data to the accounting server.

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   radiusAcctClientServerInetPortNumber This can be used to determine
      the port number on which the RADIUS accounting client is sending.
      This information could be useful in impersonating the client in
      order to send data to the accounting server.

   It is thus important to control even GET access to these objects and
   possibly to even encrypt the values of these object when sending them
   over the network via SNMP.  Not all versions of SNMP provide features
   for such a secure environment.

   SNMP versions prior to SNMPv3 do not provide a secure environment.
   Even if the network itself is secure (for example by using IPsec),
   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 implementers 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
   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.

10.  References

10.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2578]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Structure of Management Information
              Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.

   [RFC2579]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Textual Conventions for SMIv2",
              STD 58, RFC 2579, April 1999.

   [RFC2580]  McCloghrie, K., Perkins, D., and J. Schoenwaelder,
              "Conformance Statements for SMIv2", STD 58, RFC 2580,

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              April 1999.

   [RFC2866]  Rigney, C., "RADIUS Accounting", RFC 2866, June 2000.

   [RFC4001]  Daniele, M., Haberman, B., Routhier, S., and J.
              Schoenwaelder, "Textual Conventions for Internet Network
              Addresses", RFC 4001, February 2005.

10.2.  Informative References

   [2621bis]  Nelson, D., "RADIUS Accounting Server MIB for IPv6",
              draft-ietf-radext-rfc2621bis-04.txt (work in progress),
              June 2006.

   [RFC2620]  Aboba, B. and G. Zorn, "RADIUS Accounting Client MIB",
              RFC 2620, June 1999.

   [RFC3410]  Case, J., Mundy, R., Partain, D., and B. Stewart,
              "Introduction and Applicability Statements for Internet-
              Standard Management Framework", RFC 3410, December 2002.

Appendix A.  Acknowledgments

   The authors of the original MIB are Bernard Aboba and Glen Zorn.

   Many thanks to all reviewers, especially to Dave Harrington, Dan
   Romascanu, C.M. Heard, Bruno Pape, Greg Weber and Bert Wijnen.

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Author's Address

   David B. Nelson
   Enterasys Networks
   50 Minuteman Road
   Andover, MA  01810
   USA

   Email: dnelson@enterasys.com

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