One document matched: draft-ietf-pppext-ipcpmib-01.txt
Differences from draft-ietf-pppext-ipcpmib-00.txt
Internet Draft
The Definitions of Managed Objects for
the IP Network Control Protocol of
the Point-to-Point Protocol
27 July 1992
Frank Kastenholz
FTP Software, Inc
26 Princess Street
Wakefield, Mass 01880 USA
kasten@ftp.com
Status of this Memo
This document is an Internet Draft. Internet Drafts are
working documents of the Internet Engineering Task Force
(IETF), its Areas, and its Working Groups. Note that other
groups may also distribute working documents as Internet
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Draft.
Internet Draft PPP/IP MIB July 1992
This document will be submitted to the Internet Activities
Board as a Draft Standard. This document defines an
experimental extension to the SNMP MIB. Upon publication as a
Draft Standard, a new MIB number will be assigned. This is a
working document only, it should neither be cited nor quoted
in any formal document.
This document will expire before 1 Feb. 1993.
Distribution of this document is unlimited.
Please send comments to the author.
1. Abstract
This memo defines an experimental portion of the Management
Information Base (MIB) for use with network management
protocols in TCP/IP-based internets. In particular, it
describes managed objects used for managing the IP Network
Control Protocol on subnetwork interfaces using the family of
Point-to-Point Protocols[8, 9, 10, 11, & 12].
This memo does not specify a standard for the Internet
community.
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 2]
Internet Draft PPP/IP MIB July 1992
2. 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.
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.
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 3]
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3. 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) [3] 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 [1]
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
[4], subject to the additional requirements imposed by the
SNMP.
3.1. Format of Definitions
Section 5 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 [5,6].
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4. Overview
4.1. Object Selection Criteria
To be consistent with IAB directives and good engineering
practice, an explicit attempt was made to keep this MIB as
simple as possible. This was accomplished by applying the
following criteria to objects proposed for inclusion:
(1) Require objects be essential for either fault or
configuration management. In particular, objects for
which the sole purpose was to debug implementations were
explicitly excluded from the MIB.
(2) Consider evidence of current use and/or utility.
(3) Limit the total number of objects.
(4) Exclude objects which are simply derivable from others in
this or other MIBs.
4.2. Structure of the PPP
This section describes the basic model of PPP used in
developing the PPP MIB. This information should be useful to
the implementor in understanding some of the basic design
decisions of the MIB.
The PPP is not one single protocol but a large family of
protocols. Each of these is, in itself, a fairly complex
protocol. The PPP protocols may be divided into three rough
categories:
Control Protocols
The Control Protocols are used to control the operation
of the PPP. The Control Protocols include the Link
Control Protocol (LCP), the Password Authentication
Protocol (PAP), the Link Quality Report (LQR), and the
Challenge Handshake Authentication Protocol (CHAP).
Network Protocols
The Network Protocols are used to move the network
traffic over the PPP interface. A Network Protocol
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 5]
Internet Draft PPP/IP MIB July 1992
encapsulates the datagrams of a specific higher-layer
protocol that is using the PPP as a data link. Note that
within the context of PPP, the term "Network Protocol"
does not imply an OSI Layer-3 protocol; for instance,
there is a Bridging network protocol.
Network Control Protocols (NCPs)
The NCPs are used to control the operation of the Network
Protocols. Generally, each Network Protocol has its own
Network Control Protocol; thus, the IP Network Protocol
has its IP Control Protocol, the Bridging Network
Protocol has its Bridging Network Control Protocol and so
on.
This document specifies the objects used in managing one of
these protocols, namely the IP Network Control Protocol.
4.3. MIB Groups
Objects in this MIB are arranged into several MIB groups.
Each group is organized as a set of related objects.
These groups are the basic unit of conformance: if the
semantics of a group is applicable to an implementation then
all objects in the group must be implemented.
The PPP MIB is organized into several MIB Groups, including,
but not limited to, the following groups:
o The PPP Link Group
o The PPP LQR Group
o The PPP LQR Extensions Group
o The PPP IP Group
o The PPP Bridge Group
o The PPP Security Configuration Group
o The PPP CHAP Group
o The PPP PAP Group
This document specifies the following group:
The PPP IP Group
The PPP IP Group contains configuration, status, and
control variables that apply to the operation of IP over
PPP.
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 6]
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Implementation of this group is mandatory for all
implementations of PPP that support IP over PPP.
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5. Definitions
RFCpppip-MIB DEFINITIONS ::= BEGIN
IMPORTS
experimental, Counter
FROM RFC1155-SMI
OBJECT-TYPE
FROM RFC-1212
pppIp
FROM RFC-ppp
TRAP-TYPE
FROM RFC-1215;
--
-- The PPP IP Group.
-- Implementation of this group is mandatory for all
-- PPP implementations that support operating IP over PPP.
--
pppIpTable OBJECT-TYPE
SYNTAX SEQUENCE OF PppIpEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Table containing the IP parameters and
statistics for the local PPP entity."
::= { pppIp 1 }
pppIpEntry OBJECT-TYPE
SYNTAX PppIpEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"IPCP status information for a particular PPP
link."
INDEX { pppIpIndex }
::= { pppIpTable 1 }
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 8]
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PppIpEntry ::= SEQUENCE {
pppIpIndex
INTEGER,
pppIpOperStatus
INTEGER,
pppIpLocalToRemoteCompressionProtocol
INTEGER,
pppIpRemoteToLocalCompressionProtocol
INTEGER,
pppIpRemoteMaxSlotId
INTEGER,
pppIpLocalMaxSlotId
INTEGER
}
pppIpIndex OBJECT-TYPE
SYNTAX INTEGER(1..2147483648)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of ifIndex that identifies the entry
in the ifTable that is associated with the PPP
Link over which this instance of the IP network
and control protocol are operating."
::= { pppIpEntry 1 }
pppIpOperStatus OBJECT-TYPE
SYNTAX INTEGER {opened(1), not-opened(2)}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The operational status of the IP network
protocol. If the value of this object is up
then the finite state machine for the IP
network protocol has reached the Opened state."
::= { pppIpEntry 2 }
pppIpLocalToRemoteCompressionProtocol OBJECT-TYPE
SYNTAX INTEGER {
none(1),
vj-tcp(2)
}
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 9]
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ACCESS read-only
STATUS mandatory
DESCRIPTION
"The IP compression protocol that the local
PPP-IP entity uses when sending packets to the
remote PPP-IP entity."
::= { pppIpEntry 3 }
pppIpRemoteToLocalCompressionProtocol OBJECT-TYPE
SYNTAX INTEGER {
none(1),
vj-tcp(2)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The IP compression protocol that the remote
PPP-IP entity uses when sending packets to the
local PPP-IP entity."
::= { pppIpEntry 4 }
pppIpRemoteMaxSlotId OBJECT-TYPE
SYNTAX INTEGER(0..255)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The Max-Slot-Id parameter that the remote node
has advertised and that is in use on the link.
If vj-tcp header compression is not in use on
the link then the value of this object shall be
0."
::= { pppIpEntry 5 }
pppIpLocalMaxSlotId OBJECT-TYPE
SYNTAX INTEGER(0..255)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The Max-Slot-Id parameter that the local node
has advertised and that is in use on the link.
If vj-tcp header compression is not in use on
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 10]
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the link then the value of this object shall be
0."
::= { pppIpEntry 6 }
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 11]
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--
-- The PPP IP Configuration table.
-- This is a separate table in order to facilitate
-- placing these variables in a separate MIB view.
--
pppIpConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF PppIpConfigEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Table containing configuration variables for
the IPCP for the local PPP entity."
::= { pppIp 2 }
pppIpConfigEntry OBJECT-TYPE
SYNTAX PppIpConfigEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"IPCP information for a particular PPP link."
INDEX { pppIpConfigIndex }
::= { pppIpConfigTable 1 }
PppIpConfigEntry ::= SEQUENCE {
pppIpConfigIndex
INTEGER,
pppIpConfigAdminStatus
INTEGER,
pppIpConfigCompression
INTEGER
}
pppIpConfigIndex OBJECT-TYPE
SYNTAX INTEGER(1..2147483648)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of ifIndex that identifies the entry
in the ifTable that is associated with the
local IPCP entity."
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 12]
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::= { pppIpConfigEntry 1 }
pppIpConfigAdminStatus OBJECT-TYPE
SYNTAX INTEGER {open(1), close(2)}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The immediate desired status of the IP network
protocol. Setting this object to open will
inject an administrative open event into the IP
network protocol's finite state machine.
Setting this object to close will inject an
administrative close event into the IP network
protocol's finite state machine."
::= { pppIpConfigEntry 2 }
pppIpConfigCompression OBJECT-TYPE
SYNTAX INTEGER {
none(1),
vj-tcp(2)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"If none(1) then the local node will not
attempt to negotiate any IP Compression option.
Otherwise, the local node will attempt to
negotiate compression mode indicated by the
enumerated value. Changing this object will
have effect when the link is next restarted."
REFERENCE
"Section 4.0, Van Jacobson TCP/IP Header
Compression of RFC1332."
DEFVAL { none }
::= { pppIpConfigEntry 3 }
END
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 13]
Internet Draft PPP/IP MIB July 1992
6. Acknowledgements
This document was produced by the PPP working group. In
addition to the working group, the author wishes to thank the
following individuals for their comments and contributions:
Bill Simpson -- Daydreamer
Glenn McGregor -- Merit
Jesse Walker -- DEC
Chris Gunner -- DEC
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 14]
Internet Draft PPP/IP MIB July 1992
7. Security Considerations
The PPP MIB affords the network operator the ability to
configure and control the PPP links of a particular system,
including the PPP authentication protocols. This represents a
security risk.
These risks are addressed in the following manners:
(1) All variables which represent a significant security risk
are placed in separate, optional, MIB Groups. As the MIB
Group is the quantum of implementation within a MIB, the
implementor of the MIB may elect not to implement these
groups.
(2) The implementor may choose to implement the variables
which present a security risk so that they may not be
written, i.e., the variables are READ-ONLY. This method
still presents a security risk, and is not recommended,
in that the variables, specifically the PPP
Authentication Protocols' variables, may be easily read.
(3) Using the new SNMP administrative framework[13,14], the
operator can place the variables into MIB views which are
protected in that the parties which have access to those
MIB views use authentication and privacy protocols, or
the operator may elect to make these views not accessible
to any party. In order to facilitate this placement, all
security-related variables are placed in separate MIB
Tables. This eases the identification of the necessary
MIB View Subtree.
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 15]
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8. References
[1] M.T. Rose and K. McCloghrie, Structure and Identification
of Management Information for TCP/IP-based internets,
Internet Working Group Request for Comments 1155.
Network Information Center, SRI International, Menlo
Park, California, (May, 1990).
[2] K. McCloghrie and M.T. Rose, Management Information Base
for Network Management of TCP/IP-based internets - MIB-2,
Internet Working Group Request for Comments 1213.
Network Information Center, SRI International, Menlo
Park, California, (March, 1991).
[3] Information processing systems - Open Systems
Interconnection - Specification of Abstract Syntax
Notation One (ASN.1), International Organization for
Standardization. International Standard 8824, (December,
1987).
[4] 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).
[5] Rose, M., and K. McCloghrie, Editors, Concise MIB
Definitions, RFC 1212, Performance Systems International,
Hughes LAN Systems, March 1991.
[6] Rose, M., Editor, A Convention for Defining Traps for use
with the SNMP, RFC 1215, Performance Systems
International, March 1991.
[7] K. McCloghrie, Extensions to the Generic-Interface MIB,
RFC1229, Hughes LAN Systems, May 1991.
[8] W. Simpson, The Point-to-Point Protocol for the
Transmission of Multi-protocol Datagrams over Point-to-
Point Links, RFC 1331, May 1992.
[9] G. McGregor, The PPP Internet Protocol Control Protocol,
RFC 1332, Merit, May 1992.
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 16]
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[10] F. Baker, Point-to-Point Protocol Extensions for
Bridging, RFC1220, ACC, April 1991.
[11] PPP Authentication Protocols, Work In Progress
[12] W. Simpson, PPP Link Quality Monitoring, RFC 1333, May
1992.
[13] New SNMP Administrative Model, Work In Progress.
[14] SNMP Security Protocols, Work In Progress.
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 17]
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Table of Contents
Status of this Memo .................................... 1
1 Abstract .............................................. 2
2 The Network Management Framework ...................... 3
3 Objects ............................................... 4
3.1 Format of Definitions ............................... 4
4 Overview .............................................. 5
4.1 Object Selection Criteria ........................... 5
4.2 Structure of the PPP ................................ 5
4.3 MIB Groups .......................................... 6
5 Definitions ........................................... 8
6 Acknowledgements ...................................... 14
7 Security Considerations ............................... 15
8 References ............................................ 16
Frank J. Kastenholz Exp. 1 Feb. 1993 [Page 18]
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