Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!ucsd!ucbvax!VITAM6.UUCP!baker
From: baker@VITAM6.UUCP (Fred Baker)
Newsgroups: comp.protocols.tcp-ip
Subject: At your service...
Message-ID: <8911292155.AA25293@uunet.uu.net>
Date: 29 Nov 89 21:51:47 GMT
Sender: usenet@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 58

RFC 1098                          SNMP                        April 1989


   single sub-tree of the object type name space.

   An element of the set { READ-ONLY, READ-WRITE } is called an SNMP
   access mode.

   A pairing of a SNMP access mode with a SNMP MIB view is called an
   SNMP community profile.  A SNMP community profile represents
   specified access privileges to variables in a specified MIB view. For
   every variable in the MIB view in a given SNMP community profile,
   access to that variable is represented by the profile according to
   the following conventions:

      (1)  if said variable is defined in the MIB with "Access:" of
           "none," it is unavailable as an operand for any operator;

      (2)  if said variable is defined in the MIB with "Access:" of
           "read-write" or "write-only" and the access mode of the
           given profile is READ-WRITE, that variable is available
           as an operand for the get, set, and trap operations;

      (3)  otherwise, the variable is available as an operand for
           the get and trap operations.

      (4)  In those cases where a "write-only" variable is an
           operand used for the get or trap operations, the value
           given for the variable is implementation-specific.

   A pairing of a SNMP community with a SNMP community profile is called
   a SNMP access policy. An access policy represents a specified
   community profile afforded by the SNMP agent of a specified SNMP
   community to other members of that community.  All administrative
   relationships among SNMP application entities are architecturally
   defined in terms of SNMP access policies.

   For every SNMP access policy, if the network element on which the
   SNMP agent for the specified SNMP community resides is not that to
   which the MIB view for the specified profile pertains, then that
   policy is called a SNMP proxy access policy. The SNMP agent
   associated with a proxy access policy is called a SNMP proxy agent.
   While careless definition of proxy access policies can result in
   management loops, prudent definition of proxy policies is useful in
   at least two ways:

      (1)  It permits the monitoring and control of network elements
           which are otherwise not addressable using the management
           protocol and the transport protocol.  That is, a proxy
           agent may provide a protocol conversion function allowing
           a management station to apply a consistent management



Case, Fedor, Schoffstall, & Davin                               [Page 8]

Fred Baker
baker@vitalink.com


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