Definitions of Managed Objects for Extensible SNMP Agents

Status of this Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2000). All Rights Reserved.

Abstract

This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes objects managing SNMP agents that use the Agent Extensibility (AgentX) Protocol.

This memo specifies a MIB module in a manner that is both compliant to the SMIv2, and semantically identical to the peer SMIv1 definitions.

Table of Contents

1. The SNMP Management Framework ............................... 2
2. Introduction ................................................ 3
3. AgentX MIB Overview ......................................... 3
4. Managed Object Definitions for AgentX ....................... 4
5. Intellectual Property ....................................... 15
6. Acknowledgements ............................................ 16
7. Security Considerations ..................................... 16
8. References .................................................. 17
9. Authors' and Editor's Addresses ............................. 19
10. Full Copyright Statement ................................... 20

1. The SNMP Management Framework

The SNMP Management Framework presently consists of five major components:

• An overall architecture, described in RFC 2571 [1].
  
  
• Mechanisms for describing and naming objects and events for the purpose of management. The first version of this Structure of Management Information (SMI) is called SMIv1 and described in STD 16, RFC 1155 [2], STD 16, RFC 1212 [3] and RFC 1215 [4]. The second version, called SMIv2, is described in STD 58, RFC 2578
  5. , STD 58, RFC 2579 [6] and STD 58, RFC 2580 [7].
     
     
• Message protocols for transferring management information. The first version of the SNMP message protocol is called SNMPv1 and described in STD 15, RFC 1157 [8]. A second version of the SNMP message protocol, which is not an Internet standards track protocol, is called SNMPv2c and described in RFC 1901 [9] and RFC 1906 [10]. The third version of the message protocol is called SNMPv3 and described in RFC 1906 [10], RFC 2572 [11] and RFC 2574
  12. .
      
      
• Protocol operations for accessing management information. The first set of protocol operations and associated PDU formats is described in STD 15, RFC 1157 [8]. A second set of protocol operations and associated PDU formats is described in RFC 1905
  13. .
      
      
• A set of fundamental applications described in RFC 2573 [14] and the view-based access control mechanism described in RFC 2575
  15. .

A more detailed introduction to the current SNMP Management Framework can be found in RFC 2570 [16].

Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the mechanisms defined in the SMI.

This memo specifies a MIB module that is compliant to the SMIv2. A MIB conforming to the SMIv1 can be produced through the appropriate translations. The resulting translated MIB must be semantically equivalent, except where objects or events are omitted because no translation is possible (use of Counter64). Some machine readable information in SMIv2 will be converted into textual descriptions in

SMIv1 during the translation process. However, this loss of machine readable information is not considered to change the semantics of the MIB.

2. Introduction

The SNMP Agent Extensibility Protocol (AgentX) is a protocol used to distribute the implementation of an SNMP agent amongst a single "master agent" and multiple "subagents". See [17] for details about the AgentX protocol.

The goals of the AgentX MIB are:

• List the set of subagent connections that currently have logical sessions open with the master agent.
  
  
• Identify each subagent connection transport address and type.
  
  
• Identify each subagent session vendor, AgentX protocol version, and other characteristics.
  
  
• Identify the set of MIB objects each session implements, the context in which the objects are registered, and the priority of the registration.
  
  
• Determine protocol operational parameters such as the timeout interval for responses from a session and the priority at which a session registers a particular MIB region.
  
  
• Allow (but do not require) managers to explicitly close subagent sessions with the master agent.

3. AgentX MIB Overview

This MIB is organized into four groups. The agentxGeneral group provides information describing the master agent's AgentX support, including the protocol version supported. The agentxConnection group provides information describing the current set of connections capable of carrying AgentX sessions. The agentxSession group provides information describing the current set of AgentX sessions. The agentxRegistration group provides information describing the current set of registrations.

Three tables form the heart of this mib. These are the connection, session, and registration tables.

Entries in the registration table exist in a many-to-one relationship with entries in the session table. This relationship is expressed through the two common indices, agentxSessionIndex and agentxConnIndex. Entries in the registration table also exist in a many-to-one relationship with entries in the connection table. This relationship is expressed through the common index, agentxConnIndex.

Entries in the session table exist in a many-to-one relationship with entries in the connection table. This relationship is expressed through the common index, agentxConnIndex.

4. Managed Object Definitions for AgentX

AGENTX-MIB DEFINITIONS ::= BEGIN

IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, Unsigned32, mib-2

FROM SNMPv2-SMI

SnmpAdminString

FROM SNMP-FRAMEWORK-MIB

MODULE-COMPLIANCE, OBJECT-GROUP

FROM SNMPv2-CONF

TEXTUAL-CONVENTION, TimeStamp, TruthValue, TDomain

FROM SNMPv2-TC;

agentxMIB MODULE-IDENTITY
LAST-UPDATED "200001100000Z" -- Midnight 10 January 2000 ORGANIZATION "AgentX Working Group" CONTACT-INFO "WG-email: agentx@dorothy.bmc.com

Subscribe: agentx-request@dorothy.bmc.com WG-email Archive: ftp://ftp.peer.com/pub/agentx/archives FTP repository: ftp://ftp.peer.com/pub/agentx http://www.ietf.org/html.charters/agentx-charter.html

Chair:	Bob Natale ACE*COMM Corporation
Email:	bnatale@acecomm.com

WG editor

Mark Ellison Ellison Software Consulting, Inc.

Email: ellison@world.std.com

Co

author: Lauren Heintz Cisco Systems,

EMail: lheintz@cisco.com

Co

author: Smitha Gudur Independent Consultant

Email: sgudur@hotmail.com

"

DESCRIPTION "This is the MIB module for the SNMP Agent Extensibility

Protocol (AgentX). This MIB module will be implemented by the master agent.
"

REVISION "200001100000Z" -- Midnight 10 January 2000 DESCRIPTION

"Initial version published as RFC 2742."

::= { mib-2 74 }

-- Textual Conventions

AgentxTAddress ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Denotes a transport service address. This is identical to
the TAddress textual convention (SNMPv2-SMI) except that
zero-length values are permitted.
"
SYNTAX OCTET STRING (SIZE (0..255))

-- Administrative assignments

agentxObjects OBJECT IDENTIFIER ::= { agentxMIB 1 }
agentxGeneral OBJECT IDENTIFIER ::= { agentxObjects 1 }
agentxConnection OBJECT IDENTIFIER ::= { agentxObjects 2 }
agentxSession OBJECT IDENTIFIER ::= { agentxObjects 3 }
agentxRegistration OBJECT IDENTIFIER ::= { agentxObjects 4 }

agentxDefaultTimeout OBJECT-TYPE
SYNTAX INTEGER (0..255)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The default length of time, in seconds, that the master
agent should allow to elapse after dispatching a message
to a session before it regards the subagent as not

responding. This is a system-wide value that may override the timeout value associated with a particular session (agentxSessionTimeout) or a particular registered MIB region (agentxRegTimeout). If the associated value of agentxSessionTimeout and agentxRegTimeout are zero, or impractical in accordance with implementation-specific procedure of the master agent, the value represented by this object will be the effective timeout value for the

master agent to await a response to a dispatch from a given subagent.

"
DEFVAL { 5 }
::= { agentxGeneral 1 }

agentxMasterAgentXVer OBJECT-TYPE
SYNTAX INTEGER (1..255)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The AgentX protocol version supported by this master agent.
The current protocol version is 1. Note that the master agent
must also allow interaction with earlier version subagents.
"
::= { agentxGeneral 2 }

-- The AgentX Subagent Connection Group

agentxConnTableLastChange OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when the last row creation or deletion
occurred in the agentxConnectionTable.
"
::= { agentxConnection 1 }

agentxConnectionTable OBJECT-TYPE
SYNTAX SEQUENCE OF AgentxConnectionEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The agentxConnectionTable tracks all current AgentX transport
connections. There may be zero, one, or more AgentX sessions
carried on a given AgentX connection.
"
::= { agentxConnection 2 }

agentxConnectionEntry OBJECT-TYPE
SYNTAX AgentxConnectionEntry
MAX-ACCESS not-accessible
STATUS current

DESCRIPTION
"An agentxConnectionEntry contains information describing a

single AgentX transport connection. A connection may be

used to support zero or more AgentX sessions. An entry is created when a new transport connection is established, and is destroyed when the transport connection is terminated.

not be re-used. The value assigned to a given transport connection is constant for the lifetime of that connection.

   MAX-ACCESS   read-only
   STATUS       current
   DESCRIPTION
     "The transport address of the remote (subagent) end of this
      connection to the master agent.  This object may be zero-length
      for unix-domain sockets (and possibly other types of transport

addresses) since the subagent need not bind a filename to its local socket.

     "
   ::= { agentxConnectionEntry 4 }

-- The AgentX Subagent Session Group

agentxSessionTableLastChange OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when the last row creation or deletion
occurred in the agentxSessionTable.
"
::= { agentxSession 1 }

agentxSessionTable OBJECT-TYPE
SYNTAX SEQUENCE OF AgentxSessionEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of AgentX subagent sessions currently in effect.
"
::= { agentxSession 2 }

agentxSessionEntry OBJECT-TYPE
SYNTAX AgentxSessionEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Information about a single open session between the AgentX
master agent and a subagent is contained in this entry. An
entry is created when a new session is successfully established

and is destroyed either when the subagent transport connection has terminated or when the subagent session is closed.

any reason its index should not be re-used. A value of zero(0) is specifically allowed in order to be compatible with the definition of h.sessionId.

"
::= { agentxSessionEntry 1 }

agentxSessionObjectID OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is taken from the o.id field of the agentx-Open-PDU.
This attribute will report a value of '0.0' for subagents
not supporting the notion of an AgentX session object
identifier.
"
::= { agentxSessionEntry 2 }

agentxSessionDescr OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A textual description of the session. This is analogous to
sysDescr defined in the SNMPv2-MIB in RFC 1907 [19] and is
taken from the o.descr field of the agentx-Open-PDU.

This attribute will report a zero-length string value for subagents not supporting the notion of a session description.

     "
  ::= { agentxSessionEntry 3 }

agentxSessionAdminStatus OBJECT-TYPE

SYNTAX INTEGER {
up(1),
down(2)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The administrative (desired) status of the session. Setting
the value to 'down(2)' closes the subagent session (with c.reason
set to 'reasonByManager').
"
::= { agentxSessionEntry 4 }

agentxSessionOpenTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when this session was opened and,
therefore, its value when this entry was added to the table.
"
::= { agentxSessionEntry 5 }

agentxSessionAgentXVer OBJECT-TYPE
SYNTAX INTEGER (1..255)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The version of the AgentX protocol supported by the
session. This must be less than or equal to the value of
agentxMasterAgentXVer.
"
::= { agentxSessionEntry 6 }

agentxSessionTimeout OBJECT-TYPE
SYNTAX INTEGER (0..255)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The length of time, in seconds, that a master agent should

allow to elapse after dispatching a message to this session before it regards the subagent as not responding. This value is taken from the o.timeout field of the agentx-Open-PDU. This is a session-specific value that may be overridden by values associated with the specific registered MIB regions (see agentxRegTimeout). A value of zero(0) indicates that the master agent's default timeout value should be used

(see agentxDefaultTimeout).

     "
  ::= { agentxSessionEntry 7 }

-- The AgentX Registration Group

agentxRegistrationTableLastChange OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when the last row creation or deletion
occurred in the agentxRegistrationTable.
"
::= { agentxRegistration 1 }

agentxRegistrationTable OBJECT-TYPE
SYNTAX SEQUENCE OF AgentxRegistrationEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of registered regions.
"
::= { agentxRegistration 2 }

agentxRegistrationEntry OBJECT-TYPE
SYNTAX AgentxRegistrationEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Contains information for a single registered region. An
entry is created when a session successfully registers a
region and is destroyed for any of three reasons: this region

is unregistered by the session, the session is closed, or the subagent connection is closed.

agentxRegIndex OBJECT-TYPE
SYNTAX Unsigned32 (1..4294967295)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"agentxRegIndex uniquely identifies a registration entry.
This value is constant for the lifetime of an entry.
"
::= { agentxRegistrationEntry 1 }

agentxRegContext OBJECT-TYPE
SYNTAX OCTET STRING
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The context in which the session supports the objects in this
region. A zero-length context indicates the default context.
"
::= { agentxRegistrationEntry 2 }

agentxRegStart OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The starting OBJECT IDENTIFIER of this registration entry. The
session identified by agentxSessionIndex implements objects
starting at this value (inclusive). Note that this value could

identify an object type, an object instance, or a partial object instance.

"
::= { agentxRegistrationEntry 3 }

agentxRegRangeSubId OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"agentxRegRangeSubId is used to specify the range. This is
taken from r.region_subid in the registration PDU. If the value
of this object is zero, no range is specified. If it is non-zero,

it identifies the `nth' sub-identifier in r.region for which this entry's agentxRegUpperBound value is substituted in the OID for purposes of defining the region's upper bound.

     "
  ::= { agentxRegistrationEntry 4 }

agentxRegUpperBound OBJECT-TYPE

SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"agentxRegUpperBound represents the upper-bound sub-identifier in
a registration. This is taken from the r.upper_bound in the
registration PDU. If agentxRegRangeSubid (r.region_subid) is

zero, this value is also zero and is not used to define an upper bound for this registration.

"
::= { agentxRegistrationEntry 5 }

agentxRegPriority OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The registration priority. Lower values have higher priority.
This value is taken from r.priority in the register PDU.
Sessions should use the value of 127 for r.priority if a
default value is desired.
"
::= { agentxRegistrationEntry 6 }

agentxRegTimeout OBJECT-TYPE
SYNTAX INTEGER (0..255)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The timeout value, in seconds, for responses to
requests associated with this registered MIB region.
A value of zero(0) indicates the default value (indicated

by by agentxSessionTimeout or agentxDefaultTimeout) is to be used. This value is taken from the r.timeout field of the agentx-Register-PDU.

"
::= { agentxRegistrationEntry 7 }

agentxRegInstance OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of agentxRegInstance is `true' for
registrations for which the INSTANCE_REGISTRATION
was set, and is `false' for all other registrations.

"

::= { agentxRegistrationEntry 8 }

-- Conformance Statements for AgentX

 agentxConformance     OBJECT IDENTIFIER ::= { agentxMIB 2 }
 agentxMIBGroups       OBJECT IDENTIFIER ::= { agentxConformance 1 }
 agentxMIBCompliances  OBJECT IDENTIFIER ::= { agentxConformance 2 }

-- Compliance Statements for AgentX

agentxMIBCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for SNMP entities that implement the
AgentX protocol. Note that a compliant agent can implement all
objects in this MIB module as read-only.
"
MODULE -- this module
MANDATORY-GROUPS { agentxMIBGroup }

OBJECT agentxSessionAdminStatus

MIN-ACCESS read-only
DESCRIPTION

"Write access is not required.
"
::= { agentxMIBCompliances 1 }

agentxMIBGroup OBJECT-GROUP
OBJECTS {
agentxDefaultTimeout,
agentxMasterAgentXVer,
agentxConnTableLastChange,
agentxConnOpenTime,

agentxConnTransportDomain,
agentxConnTransportAddress,
agentxSessionTableLastChange,
agentxSessionTimeout,
agentxSessionObjectID,
agentxSessionDescr,
agentxSessionAdminStatus,
agentxSessionOpenTime,
agentxSessionAgentXVer,
agentxRegistrationTableLastChange, agentxRegContext,
agentxRegStart,
agentxRegRangeSubId,
agentxRegUpperBound,
agentxRegPriority,

agentxRegTimeout,

     agentxRegInstance
    }
  STATUS      current
  DESCRIPTION
     "All accessible objects in the AgentX MIB.
     "
  ::= { agentxMIBGroups 1 }

END

5. Intellectual Property

The IETF takes no position regarding the validity or scope of any intellectual property or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; neither does it represent that it has made any effort to identify any such rights. Information on the IETF's procedures with respect to rights in standards-track and standards-related documentation can be found in BCP-11. Copies of claims of rights made available for publication and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementors or users of this specification can be obtained from the IETF Secretariat.

The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights which may cover technology that may be required to practice this standard. Please address the information to the IETF Executive Director.

6. Acknowledgements

This document is the result of the efforts of the IETF AgentX Working Group (WG).

This MIB is an evolution of the Subagent MIB by Bert Wijnen (wijnen@vnet.ibm.com) which in turn was derived from the SMUX-MIB by Marshall Rose [18].

Thanks are in order to the following AgentX WG members:

Mike Daniele (Compaq Computer Corporation) Dale Francisco (Cisco Systems) Bob Natale (ACE*COMM Corporation) Randy Presuhn (BMC Software, Inc.) Shawn Routhier (Epilogue)
Mike Thatcher (Independent Consultant)

Special acknowledgement is made to:

Maria Greene (Xedia)

Special acknowledgement is also made to the following individuals for participating in the 1998 AgentX testing summit (bakeoff) held in Sunnyvale, California:

Jeff Case (SNMP Research, Inc.) Mike Daniele (Compaq Computer Corporation) Mark Ellison (Ellison Software Consulting, Inc.) Lauren Heintz (BMC Software, Inc.) Verne Hyde (Independent Consultant) Bob Natale (ACE*COMM Corporation) Shawn Routhier (Epilogue)
Mike Thatcher (Independent Consultant) Bert Wijnen (IBM T. J. Watson Research Center)

7. Security Considerations

There is a single management object defined in this MIB that has a MAX-ACCESS clause of read-write. This object may be considered sensitive or vulnerable in some network environments. The support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations.

There is a single managed object in this MIB that may contain sensitive information. This object is agentxSessionAdminStatus. Setting agentxSessionAdminStatus to an inappropriate value can effectively prevent access to management information, or provide access to inappropriate information.

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

SNMPv1 by itself is not a secure environment. Even if the network itself is secure (for example by using IPSec), even then, there is no control as to who on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB.

It is recommended that the implementers consider the security features as provided by the SNMPv3 framework. Specifically, the use of the User-based Security Model RFC 2574 [12] and the View-based Access Control Model RFC 2575 [15] is recommended.

It is then a customer/user responsibility to ensure that the SNMP entity giving access to an instance of this MIB, is properly configured to give access to the objects only to those principals (users) that have legitimate rights to indeed GET or SET (change/delete) them.

8. References

1. Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture for Describing SNMP Management Frameworks", RFC 2571, April 1999.
   
   
2. Rose, M. and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based Internets", STD 16, RFC 1155, May 1990.
   
   
3. Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16, RFC 1212, March 1991.
   
   
4. Rose, M., "A Convention for Defining Traps for use with the SNMP", RFC 1215, March 1991.
   
   
5. McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.
   
   
   
   
   

6. McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999.
   
   
7. McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999.
   
   
8. Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple Network Management Protocol", STD 15, RFC 1157, May 1990.
   
   
9. Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Introduction to Community-based SNMPv2", RFC 1901, January 1996.
   
   
10. Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Transport Mappings for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1906, January 1996.
    
    
11. Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)", RFC 2572, April 1999.
    
    
12. Blumenthal, U. and B. Wijnen, "User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)", RFC 2574, April 1999.
    
    
13. Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Protocol Operations for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1905, January 1996.
    
    
14. Levi, D., Meyer, P. and B. Stewart, "SNMP Applications", RFC 2573, April 1999.
    
    
15. Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)", RFC 2575, April 1999.
    
    
16. Case, J., Mundy, R., Partain, D. and B. Stewart, "Introduction to Version 3 of the Internet-standard Network Management Framework", RFC 2570, April 1999.
    
    
17. Daniele, M., Wijnen, B., Ellison, M. and D. Francisco, "Agent Extensibility (AgentX) Protocol, Version 1", RFC 2741, January 2000.
    
    
18. Rose, M., "SNMP MUX Protocol and MIB", RFC 1227, May 1991.
    
    
    

19. Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Management Information Base for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1907, January 1996.

9. Authors' and Editor's Addresses

Lauren Heintz
Cisco Systems
1450 North McDowell Blvd.
Petaluma, CA 94954-6515

USA
Phone:	+1 707-793-1714
EMail:	lheintz@cisco.com

Smitha Gudur

Independent Consultant
EMail: sgudur@hotmail.com

Mark Ellison (WG editor)
Ellison Software Consulting, Inc. 38 Salem Road
Atkinso, NH 03811

USA
Phone:	+1 603-362-9270
Email:	ellison@world.std.com

10. Full Copyright Statement

Copyright (C) The Internet Society (2000). All Rights Reserved.

This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English.

The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns.

This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Acknowledgement

Funding for the RFC Editor function is currently provided by the Internet Society.

Heintz, et al. Standards Track [Page 20]