rfc3019.txt

<VC++网络游戏建摸与实现>源代码

       SYNTAX     InetAddressIPv6 (SIZE (16))
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The IPv6 multicast group address for which this entry
               contains information."
       ::= { mldCacheEntry 1 }

   mldCacheIfIndex OBJECT-TYPE
       SYNTAX     InterfaceIndex
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
                "The internetwork-layer interface for which this entry
                contains information for an IPv6 multicast group
                address."
       ::= { mldCacheEntry 2 }

   mldCacheSelf OBJECT-TYPE
       SYNTAX     TruthValue
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "An indication of whether the local system is a member of



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               this group address on this interface."
       DEFVAL     { true }
       ::= { mldCacheEntry 3 }

   mldCacheLastReporter OBJECT-TYPE
       SYNTAX     InetAddressIPv6 (SIZE (16))
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
                "The IPv6 address of the source of the last membership
                report received for this IPv6 Multicast group address on
                this interface.  If no membership report has been
                received, this object has the value 0::0."
       ::= { mldCacheEntry 4 }

   mldCacheUpTime OBJECT-TYPE
       SYNTAX     TimeTicks
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The time elapsed since this entry was created."
       ::= { mldCacheEntry 5 }

   mldCacheExpiryTime OBJECT-TYPE
       SYNTAX     TimeTicks
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
                "The minimum amount of time remaining before this entry
                will be aged out.  A value of 0 indicates that the entry
                is only present because mldCacheSelf is true and that if
                the router left the group, this entry would be aged out
                immediately.  Note that some implementations may process
                Membership Reports from the local system in the same way
                as reports from other hosts, so a value of 0 is not
                required."
       ::= { mldCacheEntry 6 }

   mldCacheStatus OBJECT-TYPE
       SYNTAX     RowStatus
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The status of this row, by which new entries may be
               created, or existing entries deleted from this table."
       ::= { mldCacheEntry 7 }





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   -- conformance information

   mldMIBConformance
                  OBJECT IDENTIFIER ::= { mldMIB 2 }
   mldMIBCompliances
                  OBJECT IDENTIFIER ::= { mldMIBConformance 1 }
   mldMIBGroups
                  OBJECT IDENTIFIER ::= { mldMIBConformance 2 }


   -- compliance statements

   mldHostMIBCompliance MODULE-COMPLIANCE
       STATUS  current
       DESCRIPTION
               "The compliance statement for hosts running MLD and
               implementing the MLD MIB."
       MODULE  -- this module
       MANDATORY-GROUPS { mldBaseMIBGroup,
                          mldHostMIBGroup
                        }

       OBJECT     mldInterfaceStatus
       MIN-ACCESS read-only
       DESCRIPTION
                "Write access is not required."

       ::= { mldMIBCompliances 1 }

   mldRouterMIBCompliance MODULE-COMPLIANCE
       STATUS  current
       DESCRIPTION
               "The compliance statement for routers running MLD and
               implementing the MLD MIB."
       MODULE  -- this module
       MANDATORY-GROUPS { mldBaseMIBGroup,
                          mldRouterMIBGroup
                        }

       OBJECT     mldInterfaceStatus
       MIN-ACCESS read-only
       DESCRIPTION
                "Write access is not required."

       ::= { mldMIBCompliances 2 }


   -- units of conformance



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   mldBaseMIBGroup OBJECT-GROUP
       OBJECTS { mldCacheSelf,
                 mldCacheStatus, mldInterfaceStatus
               }
       STATUS  current
       DESCRIPTION
               "The basic collection of objects providing management of
               MLD.  The mldBaseMIBGroup is designed to allow for the
               manager creation and deletion of MLD cache entries."
       ::= { mldMIBGroups 1 }

   mldRouterMIBGroup OBJECT-GROUP
       OBJECTS { mldCacheUpTime, mldCacheExpiryTime,
                 mldInterfaceQueryInterval,
                 mldInterfaceJoins, mldInterfaceGroups,
                 mldCacheLastReporter,
                 mldInterfaceQuerierUpTime,
                 mldInterfaceQuerierExpiryTime,
                 mldInterfaceQuerier,
                 mldInterfaceVersion,
                 mldInterfaceQueryMaxResponseDelay,
                 mldInterfaceRobustness,
                 mldInterfaceLastListenQueryIntvl
               }
       STATUS  current
       DESCRIPTION
               "A collection of additional objects for management of MLD
               in routers."
       ::= { mldMIBGroups 2 }


   mldHostMIBGroup OBJECT-GROUP
       OBJECTS { mldInterfaceQuerier
               }
       STATUS  current
       DESCRIPTION
               "A collection of additional objects for management of MLD
               in hosts."
       ::= { mldMIBGroups 3 }


   mldProxyMIBGroup OBJECT-GROUP
       OBJECTS { mldInterfaceProxyIfIndex }
       STATUS  current
       DESCRIPTION
               "A collection of additional objects for management of MLD
               proxy devices."



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       ::= { mldMIBGroups 4 }

   END

Security Considerations

   This MIB contains readable objects whose values provide information
   related to multicast sessions.  Some of these objects could contain
   sensitive information.  In particular, the mldCacheSelf and
   mldCacheLastReporter could be used to identify machines which are
   listening to a given group address.  There are also a number of
   objects that have a MAX-ACCESS clause of read-write and/or read-
   create, which allow an administrator to configure MLD in the router.

   While unauthorized access to the readable objects is relatively
   innocuous, unauthorized access to the write-able objects could cause
   a denial of service.  Hence, the support of SET operations in a non-
   secure environment without proper protection can have a negative
   effect on network operations.

   SNMPv1 by itself is such an insecure environment.  Even if the
   network itself is secure (for example by using IPSec), even then,
   there is no control as to who on the network is allowed to access and
   SET (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 [RFC2574] and the View-
   based Access Control Model RFC 2575 [RFC2575] is recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity giving access to this MIB, is properly configured to give
   access to those objects only to those principals (users) that have
   legitimate rights to access them.

Acknowledgements

   This MIB module is based on the IGMP MIB authored by Keith
   McCloghrie, Dino Farinacci, and Dave Thaler.  It was updated based on
   feedback from the IPNGWG working group, Bert Wijnen, Peder Norgaard,
   and extensive comments from Juergen Schoenwaelder.










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References

   [RFC2710] Deering, S., Fenner, W. and B. Haberman, "Multicast
             Listener Discovery (MLD) for IPv6", RFC 2710, October 1999.

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

   [RFC2571] Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture
             for Describing SNMP Management Frameworks", RFC 2571, April
             1999.

   [RFC1155] Rose, M. and K. McCloghrie, "Structure and Identification
             of Management Information for TCP/IP-based Internets", STD
             16, RFC 1155, May 1990.

   [RFC1212] Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD
             16, RFC 1212, March 1991.

   [RFC1215] Rose, M., "A Convention for Defining Traps for use with the
             SNMP", RFC 1215, March 1991.

   [RFC2578] 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.

   [RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
             Rose, M. and S. Waldbusser, "Textual Conventions for
             SMIv2", STD 58, RFC 2579, April 1999.

   [RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
             Rose, M. and S. Waldbusser, "Conformance Statements for
             SMIv2", STD 58, RFC 2580, April 1999.

   [RFC1157] Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple
             Network Management Protocol", STD 15, RFC 1157, May 1990.

   [RFC1901] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
             "Introduction to Community-based SNMPv2", RFC 1901, January
             1996.

   [RFC1906] 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.






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   [RFC2572] Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message
             Processing and Dispatching for the Simple Network
             Management Protocol (SNMP)", RFC 2572, April 1999.

   [RFC2574] Blumenthal, U. and B. Wijnen, "User-based Security Model
             (USM) for version 3 of the Simple Network Management
             Protocol (SNMPv3)", RFC 2574, April 1999.

   [RFC1905] 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.

   [RFC2573] Levi, D., Meyer, P. and B. Stewart, "SNMPv3 Applications",
             RFC 2573, April 1999.

   [RFC2575] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based
             Access Control Model (VACM) for the Simple Network
             Management Protocol (SNMP)", RFC 2575, April 1999.

   [RFC2570] Case, J., Mundy, R., Partain, D. and B. Stewart,
             "Introduction to Version 3 of the Internet-standard Network
             Management Framework", RFC 2570, April 1999.

Authors' Addresses

   Brian Haberman
   Nortel Networks
   4309 Emperor Blvd.
   Suite 200
   Durham, NC  27703
   USA

   Phone: [phone]
   EMail: [e-mail]


   Randy Worzella
   IBM Corporation
   800 Park Office Drive
   Research Triangle Park, NC  27709
   USA

   Phone: [phone]
   EMail: [e-mail]







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Full Copyright Statement

   Copyright (C) The Internet Society (2001).  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
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   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
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   The limited permissions granted above are perpetual and will not be
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   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
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   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.



















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