Network Working Group                                          G. Satz
Request for Comments: 1238                         cisco Systems, Inc.
Obsoletes: RFC 1162                                          June 1991


                               CLNS MIB
                             for use with
              Connectionless Network Protocol (ISO 8473)
                                 and
             End System to Intermediate System (ISO 9542)

Status of this Memo

  This memo defines an experimental portion of the Management
  Information Base (MIB) for use with network management protocols in
  TCP/IP-based internets.  This is an Experimental Protocol for the
  Internet community.  Discussion and suggestions for improvement are
  requested.  Please refer to the current edition of the "IAB Official
  Protocol Standards" for the standardization state and status of this
  protocol.  Distribution of this memo is unlimited.

Table of Contents

  1. The Network Management Framework.......................    1
  2. Objects ...............................................    2
  2.1 Format of Definitions ................................    2
  3. Overview ..............................................    2
  3.1 Textual Conventions ..................................    3
  3.2 Changes from RFC 1162 ................................    3
  4. Definitions ...........................................    4
  4.1 Textual Conventions ..................................    4
  4.2 Groups in the CLNS MIB ...............................    4
  4.3 The CLNP Group .......................................    4
  4.4 The CLNP Error Group .................................   21
  4.5 The ES-IS Group ......................................   30
  5. References ............................................   31
  6. Security Considerations ...............................   32
  7. Author's Address.......................................   32

1.  The Network Management Framework

  The Internet-standard Network Management Framework consists of three
  components.  They are:

     RFC 1155 which defines the SMI, the mechanisms used for describing
     and naming objects for the purpose of management.  RFC 1212
     defines a more concise description mechanism, which is wholly
     consistent with the SMI.



Satz                                                            [Page 1]

RFC 1238                        CLNS MIB                       June 1991


     RFC 1156 which defines MIB-I, the core set of managed objects for
     the Internet suite of protocols.  RFC 1213, defines MIB-II, an
     evolution of MIB-I based on implementation experience and new
     operational requirements.

     RFC 1157 which defines the SNMP, the protocol used for network
     access to managed objects.

  The Framework permits new objects to be defined for the purpose of
  experimentation and evaluation.

2.  Objects

  Managed objects are accessed via a virtual information store, termed
  the Management Information Base or MIB.  Objects in the MIB are
  defined using the subset of Abstract Syntax Notation One (ASN.1) [7]
  defined in the SMI.  In particular, each object has a name, a syntax,
  and an encoding.  The name is an object identifier, an
  administratively assigned name, which specifies an object type.  The
  object type together with an object instance serves to uniquely
  identify a specific instantiation of the object.  For human
  convenience, we often use a textual string, termed the OBJECT
  DESCRIPTOR, to also refer to the object type.

  The syntax of an object type defines the abstract data structure
  corresponding to that object type.  The ASN.1 language is used for
  this purpose.  However, the SMI [3] purposely restricts the ASN.1
  constructs which may be used.  These restrictions are explicitly made
  for simplicity.

  The encoding of an object type is simply how that object type is
  represented using the object type's syntax.  Implicitly tied to the
  notion of an object type's syntax and encoding is how the object type
  is represented when being transmitted on the network.

  The SMI specifies the use of the basic encoding rules of ASN.1 [8],
  subject to the additional requirements imposed by the SNMP.

2.1.  Format of Definitions

  Section 4 contains the specification of all object types contained in
  this MIB module.  The object types are defined using the conventions
  defined in the SMI, as amended by the extensions specified in [9].

3.  Overview

  The objects defined in this MIB module are be used when the ISO
  Connectionless-mode Network Protocol [10] and End System to



Satz                                                            [Page 2]

RFC 1238                        CLNS MIB                       June 1991


  Intermediate System [11] protocols are present.  No assumptions are
  made as to what underlying protocol is being used to carry the SNMP.

  This memo uses the string encoding of [12] to textually describe OSI
  addresses.

3.1.  Textual Conventions

  A new data type is introduced as a textual convention in this MIB
  document.  This textual conventions enhance the readability of the
  specification and can ease comparison with other specifications if
  appropriate.  It should be noted that the introduction of this
  textual convention has no effect on either the syntax nor the
  semantics of any managed objects.  The use of this is merely an
  artifact of the explanatory method used.  Objects defined in terms of
  this methods are always encoded by means of the rules that define the
  primitive type.  Hence, no changes to the SMI or the SNMP are
  necessary to accommodate this textual convention which are adopted
  merely for the convenience of readers and writers in pursuit of the
  elusive goal of clear, concise, and unambiguous MIB documents.

  The ASN.1 type ClnpAddress is used to denote an OSI address.  This
  consists of a string of octets.  The first octet of the string
  contains a binary value in the range of 0..20, and indicates the the
  length in octets of the NSAP.  Following the first octet, is the
  NSAP, expressed in concrete binary notation, starting with the most
  significant octet.  A zero- length NSAP is used as a "special"
  address meaning "the default NSAP" (analogous to the IP address of
  0.0.0.0).  Such an NSAP is encoded as a single octet, containing the
  value 0.  All other NSAPs are encoded in at least 4 octets.

3.2.  Changes from RFC 1162

  Features of this MIB include:

     (1)  The managed objects in this document have been defined
          using the conventions defined in the Internet-standard
          SMI, as amended by the extensions specified in [9].  It
          must be emphasized that definitions made using these
          extensions are semantically identically to those in RFC
          1162.

     (2)  The PhysAddress textual convention from MIB-II has been
          introduced to represent media addresses.

     (3)  The clnpRoutingDiscards, clnpRouteMetric5, and
          clnpRouteInfo objects have been defined.




Satz                                                            [Page 3]

RFC 1238                        CLNS MIB                       June 1991


     (4)  The ClnpAddress type was mistakenly given a tag in RFC
          1162.  This error has been corrected.

4.  Definitions

         CLNS-MIB DEFINITIONS ::= BEGIN

         IMPORTS
                 experimental, Counter
                         FROM RFC1155-SMI
                 PhysAddress
                         FROM RFC-1213
                 OBJECT-TYPE
                         FROM RFC-1212;

         --  This MIB module uses the extended OBJECT-TYPE macro as
         --  defined in [9]


         --  the CLNS MIB module

         clns    OBJECT IDENTIFIER ::= { experimental 1 }


         -- textual conventions

         ClnpAddress ::=
                 OCTET STRING (SIZE (1..21))
         -- This data type is used to model NSAP addresses.


         -- groups in the CLNS MIB

         clnp    OBJECT IDENTIFIER ::=   { clns 1 }

         error   OBJECT IDENTIFIER ::=   { clns 2 }

         echo    OBJECT IDENTIFIER ::=   { clns 3 }

         es-is   OBJECT IDENTIFIER ::=   { clns 4 }


         -- the CLNP group

         -- Implementation of this group is recommended for all
         -- systems which implement the CLNP.





Satz                                                            [Page 4]

RFC 1238                        CLNS MIB                       June 1991


         clnpForwarding OBJECT-TYPE
             SYNTAX  INTEGER {
                         is(1),   -- entity is an intermediate system

                                  -- entity is an end system and does
                         es(2)   -- not forward PDUs
                     }
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The indication of whether this entity is active
                     as an intermediate or end system.  Only
                     intermediate systems will forward PDUs onward that
                     are not addressed to them."
              ::= { clnp 1 }

         clnpDefaultLifeTime OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The default value inserted into the Lifetime
                     field of the CLNP PDU header of PDUs sourced by
                     this entity."
             ::= { clnp 2 }

         clnpInReceives OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The total number of input PDUs received from all
                     connected network interfaces running CLNP,
                     including errors."
             ::= { clnp 3 }

         clnpInHdrErrors OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of input PDUs discarded due to errors
                     in the CLNP header, including bad checksums,
                     version mismatch, lifetime exceeded, errors
                     discovered in processing options, etc."
             ::= { clnp 4 }





Satz                                                            [Page 5]

RFC 1238                        CLNS MIB                       June 1991


         clnpInAddrErrors OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of input PDUs discarded because the
                     NSAP address in the CLNP header's destination
                     field was not a valid NSAP to be received at this
                     entity.  This count includes addresses not
                     understood.  For end systems, this is a count of
                     PDUs which arrived with a destination NSAP which
                     was not local."
             ::= { clnp 5 }

         clnpForwPDUs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of input PDUs for which this entity
                     was not the final destination and which an attempt
                     was made to forward them onward."
             ::= { clnp 6 }

         clnpInUnknownNLPs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of locally-addressed PDUs successfully
                     received but discarded because the network layer
                     protocol was unknown or unsupported (e.g., not
                     CLNP or ES-IS)."
             ::= { clnp 7 }

         clnpInUnknownULPs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of locally-addressed PDUs successfully
                     received but discarded because the upper layer
                     protocol was unknown or unsupported (e.g., not
                     TP4)."
             ::= { clnp 8 }

         clnpInDiscards OBJECT-TYPE
             SYNTAX  Counter



Satz                                                            [Page 6]

RFC 1238                        CLNS MIB                       June 1991


             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of input CLNP PDUs for which no
                     problems were encountered to prevent their
                     continued processing, but were discarded (e.g.,
                     for lack of buffer space).  Note that this counter
                     does not include any PDUs discarded while awaiting
                     re-assembly."
             ::= { clnp 9 }

         clnpInDelivers OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The total number of input PDUs successfully
                     delivered to the CLNS transport user."
             ::= { clnp 10 }

         clnpOutRequests OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The total number of CLNP PDUs which local CLNS
                     user protocols supplied to CLNP for transmission
                     requests.  This counter does not include any PDUs
                     counted in clnpForwPDUs."
             ::= { clnp 11 }

         clnpOutDiscards OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of output CLNP PDUs for which no other
                     problem was encountered to prevent their
                     transmission but were discarded (e.g., for lack of
                     buffer space).  Note this counter includes PDUs
                     counted in clnpForwPDUs."
             ::= { clnp 12 }

         clnpOutNoRoutes OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION



Satz                                                            [Page 7]

RFC 1238                        CLNS MIB                       June 1991


                     "The number of CLNP PDUs discarded because no
                     route could be found to transmit them to their
                     destination.  This counter includes any PDUs
                     counted in clnpForwPDUs."
             ::= { clnp 13 }

         clnpReasmTimeout OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The maximum number of seconds which received
                     segments are held while they are awaiting
                     reassembly at this entity."
             ::= { clnp 14 }

         clnpReasmReqds OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of CLNP segments received which needed
                     to be reassembled at this entity."
             ::= { clnp 15 }

         clnpReasmOKs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of CLNP PDUs successfully re-assembled
                     at this entity."
             ::= { clnp 16 }

         clnpReasmFails OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of failures detected by the CLNP
                     reassembly algorithm (for any reason: timed out,
                     buffer size, etc)."
             ::= { clnp 17 }

         clnpSegOKs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory



Satz                                                            [Page 8]

RFC 1238                        CLNS MIB                       June 1991


             DESCRIPTION
                     "The number of CLNP PDUs that have been
                     successfully segmented at this entity."
             ::= { clnp 18 }

         clnpSegFails OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of CLNP PDUs that have been discarded
                     because they needed to be fragmented at this
                     entity but could not."
             ::= { clnp 19 }

         clnpSegCreates OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of CLNP PDU segments that have been
                     generated as a result of segmentation at this
                     entity."
             ::= { clnp 20 }

         clnpInOpts OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of CLNP PDU segments that have been
                     input with options at this entity."
             ::= { clnp 25 }

         clnpOutOpts OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of CLNP PDU segments that have been
                     generated with options by this entity."
             ::= { clnp 26 }

         clnpRoutingDiscards OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION



Satz                                                            [Page 9]

RFC 1238                        CLNS MIB                       June 1991


                     "The number of routing entries which were chosen
                     to be discarded even though they are valid.  One
                     possible reason for discarding such an entry could
                     be to free-up buffer space for other routing
                     entries."
             ::= { clnp 27 }


         -- the CLNP Interfaces table

         -- The CLNP interfaces table contains information on the
         -- entity's interfaces which are running the CLNP.

         clnpAddrTable OBJECT-TYPE
             SYNTAX  SEQUENCE OF ClnpAddrEntry
             ACCESS  not-accessible
             STATUS  mandatory
             DESCRIPTION
                     "The table of addressing information relevant to
                     this entity's CLNP addresses.  "
             ::= { clnp 21 }

         clnpAddrEntry OBJECT-TYPE
             SYNTAX  ClnpAddrEntry
             ACCESS  not-accessible
             STATUS  mandatory
             DESCRIPTION
                     "The addressing information for one of this
                     entity's CLNP addresses."
             INDEX   { clnpAdEntAddr }
             ::= { clnpAddrTable 1 }

         ClnpAddrEntry ::=
             SEQUENCE {
                 clnpAdEntAddr
                     ClnpAddress,
                 clnpAdEntIfIndex
                     INTEGER,
                 clnpAdEntReasmMaxSize
                     INTEGER (0..65535)
             }

         clnpAdEntAddr OBJECT-TYPE
             SYNTAX  ClnpAddress
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The CLNP address to which this entry's addressing



Satz                                                           [Page 10]

RFC 1238                        CLNS MIB                       June 1991


                     information pertains."
             ::= { clnpAddrEntry 1 }

         clnpAdEntIfIndex OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The index value which uniquely identifies the
                     interface to which this entry is applicable.  The
                     interface identified by a particular value of this
                     index is the same interface as identified by the
                     same value of ifIndex."
             ::= { clnpAddrEntry 2 }

         clnpAdEntReasmMaxSize OBJECT-TYPE
             SYNTAX  INTEGER (0..65535)
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The size of the largest CLNP PDU which this
                     entity can re-assemble from incoming CLNP
                     segmented PDUs received on this interface."
             ::= { clnpAddrEntry 3 }


         -- The CLNP Routing table

         -- The CLNP routing table contains an entry for each route
         -- known to the entity.

         clnpRoutingTable OBJECT-TYPE
             SYNTAX  SEQUENCE OF ClnpRouteEntry
             ACCESS  not-accessible
             STATUS  mandatory
             DESCRIPTION
                     "This entity's CLNP routing table."
             ::= { clnp 22 }

         clnpRouteEntry OBJECT-TYPE
             SYNTAX  ClnpRouteEntry
             ACCESS  not-accessible
             STATUS  mandatory
             DESCRIPTION
                     "A route to a particular destination."
             INDEX   { clnpRouteDest }
             ::= { clnpRoutingTable 1 }




Satz                                                           [Page 11]

RFC 1238                        CLNS MIB                       June 1991


         ClnpRouteEntry ::=
             SEQUENCE {
                 clnpRouteDest
                     ClnpAddress,
                 clnpRouteIfIndex
                     INTEGER,
                 clnpRouteMetric1
                     INTEGER,
                 clnpRouteMetric2
                     INTEGER,
                 clnpRouteMetric3
                     INTEGER,
                 clnpRouteMetric4
                     INTEGER,
                 clnpRouteNextHop
                     ClnpAddress,
                 clnpRouteType
                     INTEGER,
                 clnpRouteProto
                     INTEGER,
                 clnpRouteAge
                     INTEGER,
                 clnpRouteMetric5
                     INTEGER,
                 clnpRouteInfo
                     OBJECT IDENTIFIER
             }

         clnpRouteDest OBJECT-TYPE
             SYNTAX  ClnpAddress
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The destination CLNP address of this route."
             ::= { clnpRouteEntry 1 }

         clnpRouteIfIndex OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The index value which uniquely identifies the
                     local interface through which the next hop of this
                     route should be reached.  The interface identified
                     by a particular value of this index is the same as
                     identified by the same value of ifIndex."
             ::= { clnpRouteEntry 2 }




Satz                                                           [Page 12]

RFC 1238                        CLNS MIB                       June 1991


         clnpRouteMetric1 OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The primary routing metric for this route.  The
                     semantics of this metric are determined by the
                     routing-protocol specified in the route's
                     clnpRouteProto value.  If this metric is not used,
                     its value should be set to -1."
             ::= { clnpRouteEntry 3 }

         clnpRouteMetric2 OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "An alternate routing metric for this route.  The
                     semantics of this metric are determined by the
                     routing-protocol specified in the route's
                     clnpRouteProto value.  If this metric is not used,
                     its value should be set to -1."
             ::= { clnpRouteEntry 4 }

         clnpRouteMetric3 OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "An alternate routing metric for this route.  The
                     semantics of this metric are determined by the
                     routing-protocol specified in the route's
                     clnpRouteProto value.  If this metric is not used,
                     its value should be set to -1."
             ::= { clnpRouteEntry 5 }

         clnpRouteMetric4 OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "An alternate routing metric for this route.  The
                     semantics of this metric are determined by the
                     routing-protocol specified in the route's
                     clnpRouteProto value.  If this metric is not used,
                     its value should be set to -1."
             ::= { clnpRouteEntry 6 }




Satz                                                           [Page 13]

RFC 1238                        CLNS MIB                       June 1991


         clnpRouteNextHop OBJECT-TYPE
             SYNTAX  ClnpAddress
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The CLNP address of the next hop of this route."
             ::= { clnpRouteEntry 7 }

         clnpRouteType OBJECT-TYPE
             SYNTAX  INTEGER {
                         other(1),      -- none of the following

                         invalid(2),    -- an invalidated route

                                        -- route to directly
                         direct(3),     -- connected (sub-)network

                                        -- route to a non-local
                         remote(4)      -- host/network/sub-network
                     }
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The type of route.

                     Setting this object to the value invalid(2) has
                     the effect of invaliding the corresponding entry
                     in the clnpRoutingTable.  That is, it effectively
                     dissasociates the destination identified with said
                     entry from the route identified with said entry.
                     It is an implementation-specific matter as to
                     whether the agent removes an invalidated entry
                     from the table.  Accordingly, management stations
                     must be prepared to receive tabular information
                     from agents that corresponds to entries not
                     currently in use.  Proper interpretation of such
                     entries requires examination of the relevant
                     clnpRouteType object."
             ::= { clnpRouteEntry 8 }

         clnpRouteProto OBJECT-TYPE
             SYNTAX  INTEGER {
                         other(1),     -- none of the following

                                       -- non-protocol information
                                       --   e.g., manually
                         local(2),     --   configured entries




Satz                                                           [Page 14]

RFC 1238                        CLNS MIB                       June 1991


                                       -- set via a network
                         netmgmt(3),   --   management protocol

                                       -- similar to ipRouteProto but
                                       -- omits several IP-specific
                                       -- protocols

                         is-is(9),
                         ciscoIgrp(11),
                         bbnSpfIgp(12),
                         ospf(13),
                         bgp(14)
                     }
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The routing mechanism via which this route was
                     learned.  Inclusion of values for gateway routing
                     protocols is not intended to imply that hosts
                     should support those protocols."
             ::= { clnpRouteEntry 9 }

         clnpRouteAge OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The number of seconds since this route was last
                     updated or otherwise determined to be correct.
                     Note that no semantics of `too old' can be implied
                     except through knowledge of the routing protocol
                     by which the route was learned."
             ::= { clnpRouteEntry 10 }

         clnpRouteMetric5 OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "An alternate routing metric for this route.  The
                     semantics of this metric are determined by the
                     routing-protocol specified in the route's
                     clnpRouteProto value.  If this metric is not used,
                     its value should be set to -1."
             ::= { clnpRouteEntry 11 }

         clnpRouteInfo OBJECT-TYPE
             SYNTAX  OBJECT IDENTIFIER



Satz                                                           [Page 15]

RFC 1238                        CLNS MIB                       June 1991


             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "A reference to MIB definitions specific to the
                     particular routing protocol which is responsible
                     for this route, as determined by the value
                     specified in the route's clnpRouteProto value.  If
                     this information is not present, its value should
                     be set to the OBJECT IDENTIFIER { 0 0 }, which is
                     a syntatically valid object identifier, and any
                     conformant implementation of ASN.1 and BER must be
                     able to generate and recognize this value."
             ::= { clnpRouteEntry 12 }


         -- the CLNP Address Translation table

         -- The Address Translation tables contain the CLNP address
         -- to physical address equivalences.  Some interfaces do not
         -- use translation tables for determining address
         -- equivalences; if all interfaces are of this type, then the
         -- Address Translation table is empty, i.e., has zero
         -- entries.

         clnpNetToMediaTable OBJECT-TYPE
             SYNTAX  SEQUENCE OF ClnpNetToMediaEntry
             ACCESS  not-accessible
             STATUS  mandatory
             DESCRIPTION
                     "The CLNP Address Translation table used for
                     mapping from CLNP addresses to physical
                     addresses."
             ::= { clnp 23 }

         clnpNetToMediaEntry OBJECT-TYPE
             SYNTAX  ClnpNetToMediaEntry
             ACCESS  not-accessible
             STATUS  mandatory
             DESCRIPTION
                     "Each entry contains one CLNP address to
                     `physical' address equivalence."
             INDEX   { clnpNetToMediaIfIndex, clnpNetToMediaNetAddress }
             ::= { clnpNetToMediaTable 1 }

         ClnpNetToMediaEntry ::=
             SEQUENCE {
                 clnpNetToMediaIfIndex
                     INTEGER,



Satz                                                           [Page 16]

RFC 1238                        CLNS MIB                       June 1991


                 clnpNetToMediaPhysAddress
                     PhysAddress,
                 clnpNetToMediaNetAddress
                     ClnpAddress,
                 clnpNetToMediaType
                     INTEGER,
                 clnpNetToMediaAge
                     INTEGER,
                 clnpNetToMediaHoldTime
                     INTEGER
             }

         clnpNetToMediaIfIndex OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The interface on which this entry's equivalence
                     is effective.  The interface identified by a
                     particular value of this index is the same
                     interface as identified by the same value of
                     ifIndex."
             ::= { clnpNetToMediaEntry 1 }

         clnpNetToMediaPhysAddress OBJECT-TYPE
             SYNTAX  PhysAddress
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The media-dependent `physical' address."
             ::= { clnpNetToMediaEntry 2 }

         clnpNetToMediaNetAddress OBJECT-TYPE
             SYNTAX  ClnpAddress
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The CLNP address corresponding to the media-
                     dependent `physical' address."
             ::= { clnpNetToMediaEntry 3 }

         clnpNetToMediaType OBJECT-TYPE
             SYNTAX  INTEGER {
                         other(1),       -- none of the following
                         invalid(2),     -- an invalidated mapping
                         dynamic(3),
                         static(4)
                     }



Satz                                                           [Page 17]

RFC 1238                        CLNS MIB                       June 1991


             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The type of mapping.

                     Setting this object to the value invalid(2) has
                     the effect of invalidating the corresponding entry
                     in the clnpNetToMediaTable.  That is, it
                     effectively dissassociates the interface
                     identified with said entry from the mapping
                     identified with said entry.  It is an
                     implementation-specific matter as to whether the
                     agent removes an invalidated entry from the table.
                     Accordingly, management stations must be prepared
                     to receive tabular information from agents that
                     corresponds to entries not currently in use.
                     Proper interpretation of such entries requires
                     examination of the relevant clnpNetToMediaType
                     object."
             ::= { clnpNetToMediaEntry 4 }

         clnpNetToMediaAge OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The number of seconds since this entry was last
                     updated or otherwise determined to be correct.
                     Note that no semantics of `too old' can be implied
                     except through knowledge of the type of entry."
             ::= { clnpNetToMediaEntry 5 }

         clnpNetToMediaHoldTime OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The time in seconds this entry will be valid.
                     Static entries should always report this field as
                     -1."
             ::= { clnpNetToMediaEntry 6 }

         clnpMediaToNetTable OBJECT-TYPE
             SYNTAX  SEQUENCE OF ClnpMediaToNetEntry
             ACCESS  not-accessible
             STATUS  mandatory
             DESCRIPTION
                     "The CLNP Address Translation table used for



Satz                                                           [Page 18]

RFC 1238                        CLNS MIB                       June 1991


                     mapping from physical addresses to CLNP
                     addresses."
             ::= { clnp 24 }

         clnpMediaToNetEntry OBJECT-TYPE
             SYNTAX  ClnpMediaToNetEntry
             ACCESS  not-accessible
             STATUS  mandatory
             DESCRIPTION
                     "Each entry contains on ClnpAddress to `physical'
                     address equivalence."
             INDEX   { clnpMediaToNetIfIndex, clnpMediaToNetPhysAddress }
             ::= { clnpMediaToNetTable 1 }

         ClnpMediaToNetEntry ::=
             SEQUENCE {
                 clnpMediaToNetIfIndex
                     INTEGER,
                 clnpMediaToNetNetAddress
                     ClnpAddress,
                 clnpMediaToNetPhysAddress
                     PhysAddress,
                 clnpMediaToNetType
                     INTEGER,
                 clnpMediaToNetAge
                     INTEGER,
                 clnpMediaToNetHoldTime
                     INTEGER
             }

         clnpMediaToNetIfIndex OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The interface on which this entry's equivalence
                     is effective.  The interface identified by a
                     particular value of this index is the same
                     interface as identified by the same value of
                     ifIndex."
             ::= { clnpMediaToNetEntry 1 }

         clnpMediaToNetAddress OBJECT-TYPE
             SYNTAX  ClnpAddress
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The ClnpAddress corresponding to the media-



Satz                                                           [Page 19]

RFC 1238                        CLNS MIB                       June 1991


                     dependent `physical' address."
             ::= { clnpMediaToNetEntry 2 }

         clnpMediaToNetPhysAddress OBJECT-TYPE
             SYNTAX  PhysAddress
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The media-dependent `physical' address."
             ::= { clnpMediaToNetEntry 3 }

         clnpMediaToNetType OBJECT-TYPE
             SYNTAX  INTEGER {
                         other(1),       -- none of the following
                         invalid(2),     -- an invalidated mapping
                         dynamic(3),
                         static(4)
                     }
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The type of mapping.

                     Setting this object to the value invalid(2) has
                     the effect of invalidating the corresponding entry
                     in the clnpMediaToNetTable.  That is, it
                     effectively dissassociates the interface
                     identified with said entry from the mapping
                     identified with said entry.  It is an
                     implementation-specific matter as to whether the
                     agent removes an invalidated entry from the table.
                     Accordingly, management stations must be prepared
                     to receive tabular information from agents that
                     corresponds to entries not currently in use.
                     Proper interpretation of such entries requires
                     examination of the relevant clnpMediaToNetType
                     object."
             ::= { clnpMediaToNetEntry 4 }

         clnpMediaToNetAge OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The number of seconds since this entry was last
                     updated or otherwise determined to be correct.
                     Note that no semantics of `too old' can be implied
                     except through knowledge of the type of entry."



Satz                                                           [Page 20]

RFC 1238                        CLNS MIB                       June 1991


             ::= { clnpMediaToNetEntry 5 }

         clnpMediaToNetHoldTime OBJECT-TYPE
             SYNTAX  INTEGER
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                     "The time in seconds this entry will be valid.
                     Static entries should always report this field as
                     -1."
             ::= { clnpMediaToNetEntry 6 }


         -- the CLNP Error group

         -- Implementation of this group is recommended for all
         -- systems which implement the CLNP Error protocol.

         clnpInErrors OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of CLNP Error PDUs received by this
                     entity."
             ::= { error 1 }

         clnpOutErrors OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of CLNP Error PDUs sent by this
                     entity."
             ::= { error 2 }

         clnpInErrUnspecs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unspecified CLNP Error PDUs
                     received by this entity."
             ::= { error 3 }

         clnpInErrProcs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only



Satz                                                           [Page 21]

RFC 1238                        CLNS MIB                       June 1991


             STATUS  mandatory
             DESCRIPTION
                     "The number of protocol procedure CLNP Error PDUs
                     received by this entity."
             ::= { error 4 }

         clnpInErrCksums OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of checksum CLNP Error PDUs received
                     by this entity."
             ::= { error 5 }

         clnpInErrCongests OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of congestion drop CLNP Error PDUs
                     received by this entity."
             ::= { error 6 }

         clnpInErrHdrs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of header syntax CLNP Error PDUs
                     received by this entity."
             ::= { error 7 }

         clnpInErrSegs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of segmentation disallowed CLNP Error
                     PDUs received by this entity."
             ::= { error 8 }

         clnpInErrIncomps OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of incomplete PDU CLNP Error PDUs



Satz                                                           [Page 22]

RFC 1238                        CLNS MIB                       June 1991


                     received by this entity."
             ::= { error 9 }

         clnpInErrDups OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of duplicate option CLNP Error PDUs
                     received by this entity."
             ::= { error 10 }

         clnpInErrUnreachDsts OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unreachable destination CLNP Error
                     PDUs received by this entity."
             ::= { error 11 }

         clnpInErrUnknownDsts OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unknown destination CLNP Error PDUs
                     received by this entity."
             ::= { error 12 }

         clnpInErrSRUnspecs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unspecified source route CLNP Error
                     PDUs received by this entity."
             ::= { error 13 }

         clnpInErrSRSyntaxes OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of source route syntax CLNP Error PDUs
                     received by this entity."
             ::= { error 14 }




Satz                                                           [Page 23]

RFC 1238                        CLNS MIB                       June 1991


         clnpInErrSRUnkAddrs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of source route unknown address CLNP
                     Error PDUs received by this entity."
             ::= { error 15 }

         clnpInErrSRBadPaths OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of source route bad path CLNP Error
                     PDUs received by this entity."
             ::= { error 16 }

         clnpInErrHops OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of hop count exceeded CLNP Error PDUs
                     received by this entity."
             ::= { error 17 }

         clnpInErrHopReassms OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of hop count exceeded while
                     reassembling CLNP Error PDUs received by this
                     entity."
             ::= { error 18 }

         clnpInErrUnsOptions OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unsupported option CLNP Error PDUs
                     received by this entity."
             ::= { error 19 }

         clnpInErrUnsVersions OBJECT-TYPE
             SYNTAX  Counter



Satz                                                           [Page 24]

RFC 1238                        CLNS MIB                       June 1991


             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of version mismatch CLNP Error PDUs
                     received by this entity."
             ::= { error 20 }

         clnpInErrUnsSecurities OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unsupported security option CLNP
                     Error PDUs received by this entity."
             ::= { error 21 }

         clnpInErrUnsSRs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unsupported source route option
                     CLNP Error PDUs received by this entity."
             ::= { error 22 }

         clnpInErrUnsRRs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unsupported record route option
                     CLNP Error PDUs received by this entity."
             ::= { error 23 }

         clnpInErrInterferences OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of reassembly interference CLNP Error
                     PDUs received by this entity."
             ::= { error 24 }

         clnpOutErrUnspecs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION



Satz                                                           [Page 25]

RFC 1238                        CLNS MIB                       June 1991


                     "The number of unspecified CLNP Error PDUs sent by
                     this entity."
             ::= { error 25 }

         clnpOutErrProcs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of protocol procedure CLNP Error PDUs
                     sent by this entity."
             ::= { error 26 }

         clnpOutErrCksums OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of checksum CLNP Error PDUs sent by
                     this entity."
             ::= { error 27 }

         clnpOutErrCongests OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of congestion drop CLNP Error PDUs
                     sent by this entity."
             ::= { error 28 }

         clnpOutErrHdrs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of header syntax CLNP Error PDUs sent
                     by this entity."
             ::= { error 29 }

         clnpOutErrSegs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of segmentation disallowed CLNP Error
                     PDUs sent by this entity."
             ::= { error 30 }



Satz                                                           [Page 26]

RFC 1238                        CLNS MIB                       June 1991


         clnpOutErrIncomps OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of incomplete PDU CLNP Error PDUs sent
                     by this entity."
             ::= { error 31 }

         clnpOutErrDups OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of duplicate option CLNP Error PDUs
                     sent by this entity."
             ::= { error 32 }

         clnpOutErrUnreachDsts OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unreachable destination CLNP Error
                     PDUs sent by this entity."
             ::= { error 33 }

         clnpOutErrUnknownDsts OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unknown destination CLNP Error PDUs
                     sent by this entity."
             ::= { error 34 }

         clnpOutErrSRUnspecs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unspecified source route CLNP Error
                     PDUs sent by this entity."
             ::= { error 35 }

         clnpOutErrSRSyntaxes OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only



Satz                                                           [Page 27]

RFC 1238                        CLNS MIB                       June 1991


             STATUS  mandatory
             DESCRIPTION
                     "The number of source route syntax CLNP Error PDUs
                     sent by this entity."
             ::= { error 36 }

         clnpOutErrSRUnkAddrs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of source route unknown address CLNP
                     Error PDUs sent by this entity."
             ::= { error 37 }

         clnpOutErrSRBadPaths OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of source route bad path CLNP Error
                     PDUs sent by this entity."
             ::= { error 38 }

         clnpOutErrHops OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of hop count exceeded CLNP Error PDUs
                     sent by this entity."
             ::= { error 39 }

         clnpOutErrHopReassms OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of hop count exceeded while
                     reassembling CLNP Error PDUs sent by this entity."
             ::= { error 40 }

         clnpOutErrUnsOptions OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unsupported option CLNP Error PDUs



Satz                                                           [Page 28]

RFC 1238                        CLNS MIB                       June 1991


                     sent by this entity."
             ::= { error 41 }

         clnpOutErrUnsVersions OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of version mismatch CLNP Error PDUs
                     sent by this entity."
             ::= { error 42 }

         clnpOutErrUnsSecurities OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unsupported security option CLNP
                     Error PDUs sent by this entity."
             ::= { error 43 }

         clnpOutErrUnsSRs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unsupported source route option
                     CLNP Error PDUs sent by this entity."
             ::= { error 44 }

         clnpOutErrUnsRRs OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of unsupported record route option
                     CLNP Error PDUs sent by this entity."
             ::= { error 45 }

         clnpOutErrInterferences OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of reassembly interference CLNP Error
                     PDUs sent by this entity."
             ::= { error 46 }




Satz                                                           [Page 29]

RFC 1238                        CLNS MIB                       June 1991


         -- the ES-IS group

         -- Implementation of this group is recommended for all
         -- systems which implement the End-System to Intermediate
         -- System protocol.

         esisESHins OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of ESH PDUs received by this entity."
             ::= { es-is 1 }

         esisESHouts OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of ESH PDUs sent by this entity."
             ::= { es-is 2 }

         esisISHins OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of ISH PDUs received by this entity."
             ::= { es-is 3 }

         esisISHouts OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of ISH PDUs sent by this entity."
             ::= { es-is 4 }

         esisRDUins OBJECT-TYPE
             SYNTAX  Counter
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of RDU PDUs received by this entity."
             ::= { es-is 5 }

         esisRDUouts OBJECT-TYPE
             SYNTAX  Counter



Satz                                                           [Page 30]

RFC 1238                        CLNS MIB                       June 1991


             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                     "The number of RDU PDUs sent by this entity."
             ::= { es-is 6 }

         END

5.  References

 [1]  Cerf, V., "IAB Recommendations for the Development of Internet
      Network Management Standards", RFC 1052, IAB, April 1988.

 [2]  Cerf, V., "Report of the Second Ad Hoc Network Management Review
      Group", RFC 1109, NRI, August 1989.

 [3]  Rose, M., and K. McCloghrie, "Structure and Identification of
      Management Information for TCP/IP-based Internets", RFC 1155,
      Performance Systems International and Hughes LAN Systems, May
      1990.

 [4]  McCloghrie, K., and M. Rose, "Management Information Base for
      Network Management of TCP/IP-based Internets", RFC 1156, Hughes
      LAN Systems and Performance Systems International, May 1990.

 [5]  Case, J., M. Fedor, M. Schoffstall, and J. Davin, The Simple
      Network Management Protocol", RFC 1157, University of Tennessee
      at Knoxville, Performance Systems International, Performance
      Systems International, and the MIT Laboratory for Computer
      Science, May 1990.

 [6]  McCloghrie, K., and M. Rose, Editors, "Management Information
      Base for Network Management of TCP/IP-based internets", RFC 1213,
      Hughes LAN Systems, Inc., Performance Systems International,
      March 1991.

 [7]  Information processing systems - Open Systems Interconnection,
      "Specification of Abstract Syntax Notation One (ASN.1)",
      International Organization for Standardization, International
      Standard 8824, December 1987.

 [8]  Information processing systems - Open Systems Interconnection,
      "Specification of Basic Encoding Rules for Abstract Notation One
      (ASN.1)", International Organization for Standardization,
      International Standard 8825, December 1987.

 [9]  Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions,
      RFC 1212, Performance Systems International, Hughes LAN Systems,



Satz                                                           [Page 31]

RFC 1238                        CLNS MIB                       June 1991


      Inc., March 1991.

[10]  Information processing systems - Data Communications - Protocol
      for providing the Connectionless-mode Network Service and
      Provision of Underlying Service, International Organization for
      Standardization, International Standard 8473, May 1987.

[11]  End System to Intermediate System Routing Exchange Protocol for
      Use in Conjunction with the Protocol for the Provision of the
      Connectionless-mode Network Service (ISO 8473), International
      Draft Proposal 9542.

[12]  Kille, S., "A String Encoding of Presentation Address", Research
      Note RN/89/14, Department of Computer Science, University College
      London, February 1989.

6.  Security Considerations

  Security issues are not discussed in this memo.

7.  Author's Address:

  Greg Satz
  cisco Systems, Inc.
  1350 Willow Road
  Menlo Park, CA 94025

  Phone: (415) 326-1941

  Email: [email protected]





















Satz                                                           [Page 32]