Network Working Group K. McCloghrie
Request for Comments: 2933 cisco Systems
Category: Standards Track D. Farinacci
Procket Networks
D. Thaler
Microsoft
October 2000
Network Working Group K. McCloghrie
Request for Comments: 2933 cisco Systems
Category: Standards Track D. Farinacci
Procket Networks
D. Thaler
Microsoft
October 2000
Internet Group Management Protocol MIB
Internet组管理协议MIB
Status of this Memo
本备忘录的状况
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.
本文件规定了互联网社区的互联网标准跟踪协议，并要求进行讨论和提出改进建议。有关本协议的标准化状态和状态，请参考当前版本的“互联网官方协议标准”（STD 1）。本备忘录的分发不受限制。
Copyright Notice
版权公告
Copyright (C) The Internet Society (2000). All Rights Reserved.
版权所有（C）互联网协会（2000年）。版权所有。
Abstract
摘要
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 used for managing the Internet Group Management Protocol (IGMP).
此备忘录定义了管理信息库（MIB）的一部分，用于Internet社区中的网络管理协议。特别是，它描述了用于管理Internet组管理协议（IGMP）的对象。
Table of Contents
目录
1 Introduction ................................................ 1
2 The SNMP Network Management Framework ....................... 2
3 Overview .................................................... 3
4 Definitions ................................................. 3
5 Security Considerations ..................................... 14
6 Intellectual Property Notice ................................ 15
7 Acknowledgements ............................................ 15
8 Authors' Addresses .......................................... 16
9 References .................................................. 17
10 Full Copyright Statement .................................... 19
1 Introduction ................................................ 1
2 The SNMP Network Management Framework ....................... 2
3 Overview .................................................... 3
4 Definitions ................................................. 3
5 Security Considerations ..................................... 14
6 Intellectual Property Notice ................................ 15
7 Acknowledgements ............................................ 15
8 Authors' Addresses .......................................... 16
9 References .................................................. 17
10 Full Copyright Statement .................................... 19
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 used for managing the Internet
此备忘录定义了管理信息库（MIB）的一部分，用于Internet社区中的网络管理协议。特别是，它描述了用于管理Internet的对象
Group Management Protocol (IGMP), version 1 [16] or version 2 [17]. A future version of this MIB will support IGMP version 3 (currently a work in progress). All of this MIB module is applicable to IPv4 multicast routers; a subset is applicable to hosts implementing IGMP. Since IGMP is specific to IPv4, this MIB does not support management of equivalent functionality for other address families, such as IPv6. Such management may be supported by other MIBs.
组管理协议（IGMP），版本1[16]或版本2[17]。此MIB的未来版本将支持IGMP版本3（目前正在进行中）。所有这些MIB模块都适用于IPv4多播路由器；子集适用于实现IGMP的主机。由于IGMP特定于IPv4，因此此MIB不支持管理其他地址系列（如IPv6）的等效功能。此类管理可能由其他MIB支持。
The SNMP Management Framework presently consists of five major components:
SNMP管理框架目前由五个主要组件组成：
o An overall architecture, described in RFC 2571 [1].
o RFC 2571[1]中描述的总体架构。
o 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].
o 为管理目的描述和命名对象和事件的机制。这种管理信息结构（SMI）的第一个版本称为SMIv1，并在STD 16、RFC 1155[2]、STD 16、RFC 1212[3]和RFC 1215[4]中进行了描述。第二个版本称为SMIv2，在STD 58、RFC 2578[5]、STD 58、RFC 2579[6]和STD 58、RFC 2580[7]中进行了描述。
o 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].
o 用于传输管理信息的消息协议。SNMP消息协议的第一个版本称为SNMPv1，在STD 15、RFC 1157[8]中进行了描述。SNMP消息协议的第二个版本不是互联网标准跟踪协议，称为SNMPv2c，在RFC 1901[9]和RFC 1906[10]中进行了描述。消息协议的第三个版本称为SNMPv3，在RFC 1906[10]、RFC 2572[11]和RFC 2574[12]中进行了描述。
o 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].
o 访问管理信息的协议操作。STD 15、RFC 1157[8]中描述了第一组协议操作和相关PDU格式。RFC 1905[13]中描述了第二组协议操作和相关PDU格式。
o A set of fundamental applications described in RFC 2573 [14] and the view-based access control mechanism described in RFC 2575 [15].
o RFC 2573[14]中描述的一组基本应用程序和RFC 2575[15]中描述的基于视图的访问控制机制。
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.
托管对象通过虚拟信息存储（称为管理信息库或MIB）进行访问。MIB中的对象是使用SMI中定义的机制定义的。
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
此备忘录指定了符合SMIv2的MIB模块。通过适当的翻译，可以生成符合SMIv1的MIB。生成的翻译MIB必须是语义上的
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.
等效，除非对象或事件因无法转换而被省略（使用计数器64）。在翻译过程中，SMIv2中的一些机器可读信息将转换为SMIv1中的文本描述。但是，这种机器可读信息的丢失不被认为会改变MIB的语义。
This MIB module contains two tables:
此MIB模块包含两个表：
(1) the IGMP Interface Table which contains one row for each interface on which IGMP is enabled, and
(1) IGMP接口表，其中包含启用IGMP的每个接口的一行，以及
(2) the IGMP Cache Table which contains one row for each IP multicast group for which there are members on a particular interface.
(2) IGMP缓存表，其中包含特定接口上有成员的每个IP多播组的一行。
Both tables are intended to be implemented by hosts and routers, but some columnar objects in each table apply only to routers.
这两个表都打算由主机和路由器实现，但每个表中的一些列对象仅适用于路由器。
IGMP-STD-MIB DEFINITIONS ::= BEGIN
IGMP-STD-MIB DEFINITIONS ::= BEGIN
IMPORTS MODULE-IDENTITY, OBJECT-TYPE, mib-2, Counter32, Gauge32, Unsigned32, IpAddress, TimeTicks FROM SNMPv2-SMI RowStatus, TruthValue FROM SNMPv2-TC MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF InterfaceIndexOrZero, InterfaceIndex FROM IF-MIB;
从SNMPv2 SMI RowStatus导入模块标识、对象类型、mib-2、计数器32、量表32、无符号32、IP地址、时间刻度、SNMPv2 TC模块符合性的TruthValue、SNMPv2 CONF InterfaceIndexOrZero的对象组、IF-mib的InterfaceIndex；
igmpStdMIB MODULE-IDENTITY LAST-UPDATED "200009280000Z" -- September 28, 2000 ORGANIZATION "IETF IDMR Working Group." CONTACT-INFO " Dave Thaler Microsoft Corporation One Microsoft Way Redmond, WA 98052-6399 US
igmpStdMIB模块标识最后一次更新“2000092800000Z”--2000年9月28日组织“IETF IDMR工作组”。联系方式“Dave Thaler微软公司一路微软雷德蒙，华盛顿州98052-6399美国
Phone: +1 425 703 8835 EMail: dthaler@microsoft.com" DESCRIPTION "The MIB module for IGMP Management." REVISION "200009280000Z" -- September 28, 2000
电话：+1 425 703 8835电子邮件：dthaler@microsoft.com“描述”用于IGMP管理的MIB模块。“修订版”2000092800000Z--2000年9月28日
DESCRIPTION
"Initial version, published as RFC 2933."
::= { mib-2 85 }
DESCRIPTION
"Initial version, published as RFC 2933."
::= { mib-2 85 }
igmpMIBObjects OBJECT IDENTIFIER ::= { igmpStdMIB 1 }
igmpMIBObjects OBJECT IDENTIFIER ::= { igmpStdMIB 1 }
-- -- The IGMP Interface Table --
----IGMP接口表--
igmpInterfaceTable OBJECT-TYPE
SYNTAX SEQUENCE OF IgmpInterfaceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the interfaces on which IGMP
is enabled."
::= { igmpMIBObjects 1 }
igmpInterfaceTable OBJECT-TYPE
SYNTAX SEQUENCE OF IgmpInterfaceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the interfaces on which IGMP
is enabled."
::= { igmpMIBObjects 1 }
igmpInterfaceEntry OBJECT-TYPE
SYNTAX IgmpInterfaceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) representing an interface on
which IGMP is enabled."
INDEX { igmpInterfaceIfIndex }
::= { igmpInterfaceTable 1 }
igmpInterfaceEntry OBJECT-TYPE
SYNTAX IgmpInterfaceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) representing an interface on
which IGMP is enabled."
INDEX { igmpInterfaceIfIndex }
::= { igmpInterfaceTable 1 }
IgmpInterfaceEntry ::= SEQUENCE {
igmpInterfaceIfIndex InterfaceIndex,
igmpInterfaceQueryInterval Unsigned32,
igmpInterfaceStatus RowStatus,
igmpInterfaceVersion Unsigned32,
igmpInterfaceQuerier IpAddress,
igmpInterfaceQueryMaxResponseTime Unsigned32,
igmpInterfaceQuerierUpTime TimeTicks,
igmpInterfaceQuerierExpiryTime TimeTicks,
igmpInterfaceVersion1QuerierTimer TimeTicks,
igmpInterfaceWrongVersionQueries Counter32,
igmpInterfaceJoins Counter32,
igmpInterfaceProxyIfIndex InterfaceIndexOrZero,
igmpInterfaceGroups Gauge32,
igmpInterfaceRobustness Unsigned32,
igmpInterfaceLastMembQueryIntvl Unsigned32
}
IgmpInterfaceEntry ::= SEQUENCE {
igmpInterfaceIfIndex InterfaceIndex,
igmpInterfaceQueryInterval Unsigned32,
igmpInterfaceStatus RowStatus,
igmpInterfaceVersion Unsigned32,
igmpInterfaceQuerier IpAddress,
igmpInterfaceQueryMaxResponseTime Unsigned32,
igmpInterfaceQuerierUpTime TimeTicks,
igmpInterfaceQuerierExpiryTime TimeTicks,
igmpInterfaceVersion1QuerierTimer TimeTicks,
igmpInterfaceWrongVersionQueries Counter32,
igmpInterfaceJoins Counter32,
igmpInterfaceProxyIfIndex InterfaceIndexOrZero,
igmpInterfaceGroups Gauge32,
igmpInterfaceRobustness Unsigned32,
igmpInterfaceLastMembQueryIntvl Unsigned32
}
igmpInterfaceIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The ifIndex value of the interface for which IGMP is
enabled."
::= { igmpInterfaceEntry 1 }
igmpInterfaceIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The ifIndex value of the interface for which IGMP is
enabled."
::= { igmpInterfaceEntry 1 }
igmpInterfaceQueryInterval OBJECT-TYPE
SYNTAX Unsigned32
UNITS "seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The frequency at which IGMP Host-Query packets are
transmitted on this interface."
DEFVAL { 125 }
::= { igmpInterfaceEntry 2 }
igmpInterfaceQueryInterval OBJECT-TYPE
SYNTAX Unsigned32
UNITS "seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The frequency at which IGMP Host-Query packets are
transmitted on this interface."
DEFVAL { 125 }
::= { igmpInterfaceEntry 2 }
igmpInterfaceStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The activation of a row enables IGMP on the interface. The
destruction of a row disables IGMP on the interface."
::= { igmpInterfaceEntry 3 }
igmpInterfaceStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The activation of a row enables IGMP on the interface. The
destruction of a row disables IGMP on the interface."
::= { igmpInterfaceEntry 3 }
igmpInterfaceVersion OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The version of IGMP which is running on this interface.
This object can be used to configure a router capable of
running either value. For IGMP to function correctly, all
routers on a LAN must be configured to run the same version
of IGMP on that LAN."
DEFVAL { 2 }
::= { igmpInterfaceEntry 4 }
igmpInterfaceVersion OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The version of IGMP which is running on this interface.
This object can be used to configure a router capable of
running either value. For IGMP to function correctly, all
routers on a LAN must be configured to run the same version
of IGMP on that LAN."
DEFVAL { 2 }
::= { igmpInterfaceEntry 4 }
igmpInterfaceQuerier OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-only STATUS current DESCRIPTION "The address of the IGMP Querier on the IP subnet to which
igmpInterfaceQuerier对象类型语法IpAddress MAX-ACCESS只读状态当前描述“要访问的IP子网上IGMP查询器的地址
this interface is attached."
::= { igmpInterfaceEntry 5 }
this interface is attached."
::= { igmpInterfaceEntry 5 }
igmpInterfaceQueryMaxResponseTime OBJECT-TYPE
SYNTAX Unsigned32 (0..255)
UNITS "tenths of seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The maximum query response time advertised in IGMPv2
queries on this interface."
DEFVAL { 100 }
::= { igmpInterfaceEntry 6 }
igmpInterfaceQueryMaxResponseTime OBJECT-TYPE
SYNTAX Unsigned32 (0..255)
UNITS "tenths of seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The maximum query response time advertised in IGMPv2
queries on this interface."
DEFVAL { 100 }
::= { igmpInterfaceEntry 6 }
igmpInterfaceQuerierUpTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time since igmpInterfaceQuerier was last changed."
::= { igmpInterfaceEntry 7 }
igmpInterfaceQuerierUpTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time since igmpInterfaceQuerier was last changed."
::= { igmpInterfaceEntry 7 }
igmpInterfaceQuerierExpiryTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The amount of time remaining before the Other Querier
Present Timer expires. If the local system is the querier,
the value of this object is zero."
::= { igmpInterfaceEntry 8 }
igmpInterfaceQuerierExpiryTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The amount of time remaining before the Other Querier
Present Timer expires. If the local system is the querier,
the value of this object is zero."
::= { igmpInterfaceEntry 8 }
igmpInterfaceVersion1QuerierTimer OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time remaining until the host assumes that there are no
IGMPv1 routers present on the interface. While this is non-
zero, the host will reply to all queries with version 1
membership reports."
::= { igmpInterfaceEntry 9 }
igmpInterfaceVersion1QuerierTimer OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time remaining until the host assumes that there are no
IGMPv1 routers present on the interface. While this is non-
zero, the host will reply to all queries with version 1
membership reports."
::= { igmpInterfaceEntry 9 }
igmpInterfaceWrongVersionQueries OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION
IGMPINTERFACEErrorVersionQueries对象类型语法计数器32 MAX-ACCESS只读状态当前说明
"The number of queries received whose IGMP version does not
match igmpInterfaceVersion, over the lifetime of the row
entry. IGMP requires that all routers on a LAN be
configured to run the same version of IGMP. Thus, if any
queries are received with the wrong version, this indicates
a configuration error."
::= { igmpInterfaceEntry 10 }
"The number of queries received whose IGMP version does not
match igmpInterfaceVersion, over the lifetime of the row
entry. IGMP requires that all routers on a LAN be
configured to run the same version of IGMP. Thus, if any
queries are received with the wrong version, this indicates
a configuration error."
::= { igmpInterfaceEntry 10 }
igmpInterfaceJoins OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times a group membership has been added on
this interface; that is, the number of times an entry for
this interface has been added to the Cache Table. This
object gives an indication of the amount of IGMP activity
over the lifetime of the row entry."
::= { igmpInterfaceEntry 11 }
igmpInterfaceJoins OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times a group membership has been added on
this interface; that is, the number of times an entry for
this interface has been added to the Cache Table. This
object gives an indication of the amount of IGMP activity
over the lifetime of the row entry."
::= { igmpInterfaceEntry 11 }
igmpInterfaceProxyIfIndex OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Some devices implement a form of IGMP proxying whereby
memberships learned on the interface represented by this
row, cause IGMP Host Membership Reports to be sent on the
interface whose ifIndex value is given by this object. Such
a device would implement the igmpV2RouterMIBGroup only on
its router interfaces (those interfaces with non-zero
igmpInterfaceProxyIfIndex). Typically, the value of this
object is 0, indicating that no proxying is being done."
DEFVAL { 0 }
::= { igmpInterfaceEntry 12 }
igmpInterfaceProxyIfIndex OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Some devices implement a form of IGMP proxying whereby
memberships learned on the interface represented by this
row, cause IGMP Host Membership Reports to be sent on the
interface whose ifIndex value is given by this object. Such
a device would implement the igmpV2RouterMIBGroup only on
its router interfaces (those interfaces with non-zero
igmpInterfaceProxyIfIndex). Typically, the value of this
object is 0, indicating that no proxying is being done."
DEFVAL { 0 }
::= { igmpInterfaceEntry 12 }
igmpInterfaceGroups OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current number of entries for this interface in the
Cache Table."
::= { igmpInterfaceEntry 13 }
igmpInterfaceGroups OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current number of entries for this interface in the
Cache Table."
::= { igmpInterfaceEntry 13 }
igmpInterfaceRobustness OBJECT-TYPE SYNTAX Unsigned32 (1..255) MAX-ACCESS read-create
IGMPINTERFACEROBUSITY对象类型语法Unsigned32（1..255）MAX-ACCESS读取创建
STATUS current
DESCRIPTION
"The Robustness Variable allows tuning for the expected
packet loss on a subnet. If a subnet is expected to be
lossy, the Robustness Variable may be increased. IGMP is
robust to (Robustness Variable-1) packet losses."
DEFVAL { 2 }
::= { igmpInterfaceEntry 14 }
STATUS current
DESCRIPTION
"The Robustness Variable allows tuning for the expected
packet loss on a subnet. If a subnet is expected to be
lossy, the Robustness Variable may be increased. IGMP is
robust to (Robustness Variable-1) packet losses."
DEFVAL { 2 }
::= { igmpInterfaceEntry 14 }
igmpInterfaceLastMembQueryIntvl OBJECT-TYPE
SYNTAX Unsigned32 (0..255)
UNITS "tenths of seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The Last Member Query Interval is the Max Response Time
inserted into Group-Specific Queries sent in response to
Leave Group messages, and is also the amount of time between
Group-Specific Query messages. This value may be tuned to
modify the leave latency of the network. A reduced value
results in reduced time to detect the loss of the last
member of a group. The value of this object is irrelevant
if igmpInterfaceVersion is 1."
DEFVAL { 10 }
::= { igmpInterfaceEntry 15 }
igmpInterfaceLastMembQueryIntvl OBJECT-TYPE
SYNTAX Unsigned32 (0..255)
UNITS "tenths of seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The Last Member Query Interval is the Max Response Time
inserted into Group-Specific Queries sent in response to
Leave Group messages, and is also the amount of time between
Group-Specific Query messages. This value may be tuned to
modify the leave latency of the network. A reduced value
results in reduced time to detect the loss of the last
member of a group. The value of this object is irrelevant
if igmpInterfaceVersion is 1."
DEFVAL { 10 }
::= { igmpInterfaceEntry 15 }
-- -- The IGMP Cache Table --
----IGMP缓存表--
igmpCacheTable OBJECT-TYPE
SYNTAX SEQUENCE OF IgmpCacheEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the IP multicast groups for
which there are members on a particular interface."
::= { igmpMIBObjects 2 }
igmpCacheTable OBJECT-TYPE
SYNTAX SEQUENCE OF IgmpCacheEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The (conceptual) table listing the IP multicast groups for
which there are members on a particular interface."
::= { igmpMIBObjects 2 }
igmpCacheEntry OBJECT-TYPE
SYNTAX IgmpCacheEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the igmpCacheTable."
INDEX { igmpCacheAddress, igmpCacheIfIndex }
::= { igmpCacheTable 1 }
igmpCacheEntry OBJECT-TYPE
SYNTAX IgmpCacheEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the igmpCacheTable."
INDEX { igmpCacheAddress, igmpCacheIfIndex }
::= { igmpCacheTable 1 }
IgmpCacheEntry ::= SEQUENCE {
igmpCacheAddress IpAddress,
igmpCacheIfIndex InterfaceIndex,
igmpCacheSelf TruthValue,
igmpCacheLastReporter IpAddress,
igmpCacheUpTime TimeTicks,
igmpCacheExpiryTime TimeTicks,
igmpCacheStatus RowStatus,
igmpCacheVersion1HostTimer TimeTicks
}
IgmpCacheEntry ::= SEQUENCE {
igmpCacheAddress IpAddress,
igmpCacheIfIndex InterfaceIndex,
igmpCacheSelf TruthValue,
igmpCacheLastReporter IpAddress,
igmpCacheUpTime TimeTicks,
igmpCacheExpiryTime TimeTicks,
igmpCacheStatus RowStatus,
igmpCacheVersion1HostTimer TimeTicks
}
igmpCacheAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP multicast group address for which this entry
contains information."
::= { igmpCacheEntry 1 }
igmpCacheAddress OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP multicast group address for which this entry
contains information."
::= { igmpCacheEntry 1 }
igmpCacheIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The interface for which this entry contains information for
an IP multicast group address."
::= { igmpCacheEntry 2 }
igmpCacheIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The interface for which this entry contains information for
an IP multicast group address."
::= { igmpCacheEntry 2 }
igmpCacheSelf OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An indication of whether the local system is a member of
this group address on this interface."
DEFVAL { true }
::= { igmpCacheEntry 3 }
igmpCacheSelf OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An indication of whether the local system is a member of
this group address on this interface."
DEFVAL { true }
::= { igmpCacheEntry 3 }
igmpCacheLastReporter OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-only STATUS current DESCRIPTION "The IP address of the source of the last membership report received for this IP Multicast group address on this interface. If no membership report has been received, this object has the value 0.0.0.0."
igmpCacheLastReporter对象类型语法IpAddress MAX-ACCESS只读状态当前描述“此接口上此IP多播组地址收到的上一次成员资格报告源的IP地址。如果未收到成员资格报告，则此对象的值为0.0.0.0。”
::= { igmpCacheEntry 4 }
::= { igmpCacheEntry 4 }
igmpCacheUpTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time elapsed since this entry was created."
::= { igmpCacheEntry 5 }
igmpCacheUpTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time elapsed since this entry was created."
::= { igmpCacheEntry 5 }
igmpCacheExpiryTime 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 igmpCacheSelf 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."
::= { igmpCacheEntry 6 }
igmpCacheExpiryTime 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 igmpCacheSelf 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."
::= { igmpCacheEntry 6 }
igmpCacheStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this entry."
::= { igmpCacheEntry 7 }
igmpCacheStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this entry."
::= { igmpCacheEntry 7 }
igmpCacheVersion1HostTimer OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time remaining until the local router will assume that
there are no longer any IGMP version 1 members on the IP
subnet attached to this interface. Upon hearing any IGMPv1
Membership Report, this value is reset to the group
membership timer. While this time remaining is non-zero,
the local router ignores any IGMPv2 Leave messages for this
group that it receives on this interface."
::= { igmpCacheEntry 8 }
igmpCacheVersion1HostTimer OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time remaining until the local router will assume that
there are no longer any IGMP version 1 members on the IP
subnet attached to this interface. Upon hearing any IGMPv1
Membership Report, this value is reset to the group
membership timer. While this time remaining is non-zero,
the local router ignores any IGMPv2 Leave messages for this
group that it receives on this interface."
::= { igmpCacheEntry 8 }
-- conformance information
--一致性信息
igmpMIBConformance
OBJECT IDENTIFIER ::= { igmpStdMIB 2 }
igmpMIBCompliances
OBJECT IDENTIFIER ::= { igmpMIBConformance 1 }
igmpMIBGroups OBJECT IDENTIFIER ::= { igmpMIBConformance 2 }
igmpMIBConformance
OBJECT IDENTIFIER ::= { igmpStdMIB 2 }
igmpMIBCompliances
OBJECT IDENTIFIER ::= { igmpMIBConformance 1 }
igmpMIBGroups OBJECT IDENTIFIER ::= { igmpMIBConformance 2 }
-- compliance statements
--合规声明
igmpV1HostMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for hosts running IGMPv1 and implementing the IGMP MIB." MODULE -- this module MANDATORY-GROUPS { igmpBaseMIBGroup }
igmpV1HostMIBCompliance MODULE-COMPLIANCE STATUS当前描述“运行IGMPv1并实现IGMP MIB的主机的符合性声明。”模块--此模块为必填模块-GROUPS{igmpBaseMIBGroup}
OBJECT igmpInterfaceStatus MIN-ACCESS read-only DESCRIPTION "Write access is not required."
对象igmpInterfaceStatus最小访问只读描述“不需要写访问。”
OBJECT igmpCacheStatus MIN-ACCESS read-only DESCRIPTION "Write access is not required."
对象igmpCacheStatus MIN-ACCESS只读描述“不需要写访问。”
::= { igmpMIBCompliances 1 }
::= { igmpMIBCompliances 1 }
igmpV1RouterMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for routers running IGMPv1 and implementing the IGMP MIB." MODULE -- this module MANDATORY-GROUPS { igmpBaseMIBGroup, igmpRouterMIBGroup }
igmpV1RouterMIBCompliance MODULE-COMPLIANCE STATUS当前描述“运行IGMPv1并实现IGMP MIB的路由器的符合性声明”。模块——此模块为必填组{igmpBaseMIBGroup，IGMPROUTEMIBGROUP}
OBJECT igmpInterfaceStatus MIN-ACCESS read-only DESCRIPTION "Write access is not required." OBJECT igmpCacheStatus MIN-ACCESS read-only DESCRIPTION "Write access is not required."
对象igmpInterfaceStatus MIN-ACCESS只读描述“不需要写访问”。对象igmpCacheStatus MIN-ACCESS只读描述“不需要写访问。”
::= { igmpMIBCompliances 2 }
::= { igmpMIBCompliances 2 }
igmpV2HostMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for hosts running IGMPv2 and implementing the IGMP MIB." MODULE -- this module MANDATORY-GROUPS { igmpBaseMIBGroup, igmpV2HostMIBGroup }
igmpV2HostMIBCompliance MODULE-COMPLIANCE STATUS当前描述“运行IGMPv2并实现IGMP MIB的主机的符合性声明”。模块--此模块为必填模块-GROUPS{igmpBaseMIBGroup，igmpV2HostMIBGroup}
OBJECT igmpInterfaceStatus MIN-ACCESS read-only DESCRIPTION "Write access is not required."
对象igmpInterfaceStatus最小访问只读描述“不需要写访问。”
OBJECT igmpCacheStatus MIN-ACCESS read-only DESCRIPTION "Write access is not required."
对象igmpCacheStatus MIN-ACCESS只读描述“不需要写访问。”
::= { igmpMIBCompliances 3 }
::= { igmpMIBCompliances 3 }
igmpV2RouterMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for routers running IGMPv2 and implementing the IGMP MIB." MODULE -- this module MANDATORY-GROUPS { igmpBaseMIBGroup, igmpRouterMIBGroup, igmpV2RouterMIBGroup }
igmpV2RouterMIBCompliance MODULE-COMPLIANCE STATUS当前描述“运行IGMPv2并实现IGMP MIB的路由器的符合性声明”。MODULE--此模块为必填组{igmpBaseMIBGroup，igmpRouterMIBGroup，igmpV2RouterMIBGroup}
OBJECT igmpInterfaceStatus MIN-ACCESS read-only DESCRIPTION "Write access is not required." OBJECT igmpCacheStatus MIN-ACCESS read-only DESCRIPTION "Write access is not required."
对象igmpInterfaceStatus MIN-ACCESS只读描述“不需要写访问”。对象igmpCacheStatus MIN-ACCESS只读描述“不需要写访问。”
::= { igmpMIBCompliances 4 }
::= { igmpMIBCompliances 4 }
-- units of conformance
--一致性单位
igmpBaseMIBGroup OBJECT-GROUP
OBJECTS { igmpCacheSelf,
igmpCacheStatus, igmpInterfaceStatus
}
STATUS current
DESCRIPTION
"The basic collection of objects providing management of
IGMP version 1 or 2."
::= { igmpMIBGroups 1 }
igmpBaseMIBGroup OBJECT-GROUP
OBJECTS { igmpCacheSelf,
igmpCacheStatus, igmpInterfaceStatus
}
STATUS current
DESCRIPTION
"The basic collection of objects providing management of
IGMP version 1 or 2."
::= { igmpMIBGroups 1 }
igmpRouterMIBGroup OBJECT-GROUP
OBJECTS { igmpCacheUpTime, igmpCacheExpiryTime,
igmpInterfaceJoins, igmpInterfaceGroups,
igmpCacheLastReporter, igmpInterfaceQuerierUpTime,
igmpInterfaceQuerierExpiryTime,
igmpInterfaceQueryInterval
}
STATUS current
DESCRIPTION
"A collection of additional objects for management of IGMP
version 1 or 2 in routers."
::= { igmpMIBGroups 2 }
igmpRouterMIBGroup OBJECT-GROUP
OBJECTS { igmpCacheUpTime, igmpCacheExpiryTime,
igmpInterfaceJoins, igmpInterfaceGroups,
igmpCacheLastReporter, igmpInterfaceQuerierUpTime,
igmpInterfaceQuerierExpiryTime,
igmpInterfaceQueryInterval
}
STATUS current
DESCRIPTION
"A collection of additional objects for management of IGMP
version 1 or 2 in routers."
::= { igmpMIBGroups 2 }
igmpV2HostMIBGroup OBJECT-GROUP
OBJECTS { igmpInterfaceVersion1QuerierTimer }
STATUS current
DESCRIPTION
"A collection of additional objects for management of IGMP
version 2 in hosts."
::= { igmpMIBGroups 3 }
igmpV2HostMIBGroup OBJECT-GROUP
OBJECTS { igmpInterfaceVersion1QuerierTimer }
STATUS current
DESCRIPTION
"A collection of additional objects for management of IGMP
version 2 in hosts."
::= { igmpMIBGroups 3 }
igmpHostOptMIBGroup OBJECT-GROUP
OBJECTS { igmpCacheLastReporter, igmpInterfaceQuerier }
STATUS current
DESCRIPTION
"A collection of optional objects for IGMP hosts.
Supporting this group can be especially useful in an
environment with a router which does not support the IGMP
MIB."
::= { igmpMIBGroups 4 }
igmpHostOptMIBGroup OBJECT-GROUP
OBJECTS { igmpCacheLastReporter, igmpInterfaceQuerier }
STATUS current
DESCRIPTION
"A collection of optional objects for IGMP hosts.
Supporting this group can be especially useful in an
environment with a router which does not support the IGMP
MIB."
::= { igmpMIBGroups 4 }
igmpV2RouterMIBGroup OBJECT-GROUP OBJECTS { igmpInterfaceVersion, igmpInterfaceQuerier, igmpInterfaceQueryMaxResponseTime, igmpInterfaceRobustness, igmpInterfaceWrongVersionQueries,
igmpV2RouterMIBGroup对象组对象{igmpInterfaceVersion，igmpInterfaceQuerier，igmpInterfaceQueryMaxResponseTime，IGMPinterFaceRobustibility，IGMPinterFaceErrorVersionQueries，
igmpInterfaceLastMembQueryIntvl,
igmpCacheVersion1HostTimer
}
STATUS current
DESCRIPTION
"A collection of additional objects for management of IGMP
version 2 in routers."
::= { igmpMIBGroups 5 }
igmpInterfaceLastMembQueryIntvl,
igmpCacheVersion1HostTimer
}
STATUS current
DESCRIPTION
"A collection of additional objects for management of IGMP
version 2 in routers."
::= { igmpMIBGroups 5 }
igmpV2ProxyMIBGroup OBJECT-GROUP
OBJECTS { igmpInterfaceProxyIfIndex }
STATUS current
DESCRIPTION
"A collection of additional objects for management of IGMP
proxy devices."
::= { igmpMIBGroups 6 }
igmpV2ProxyMIBGroup OBJECT-GROUP
OBJECTS { igmpInterfaceProxyIfIndex }
STATUS current
DESCRIPTION
"A collection of additional objects for management of IGMP
proxy devices."
::= { igmpMIBGroups 6 }
END
终止
This MIB contains readable objects whose values provide information related to multicast sessions. Some of these objects could contain sensitive information. In particular, the igmpCacheSelf and igmpCacheLastReporter can 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 IGMP in the router.
此MIB包含可读对象，其值提供与多播会话相关的信息。其中一些对象可能包含敏感信息。特别是，igmpCacheSelf和igmpCacheLastReporter可用于识别侦听给定组地址的机器。还有许多对象具有读写和/或读创建的MAX-ACCESS子句，允许管理员在路由器中配置IGMP。
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 for SET operations in a non-secure environment without proper protection can have a negative effect on network operations.
虽然对可读对象的未授权访问相对无害，但对可写对象的未授权访问可能会导致拒绝服务。因此，在没有适当保护的非安全环境中支持SET操作可能会对网络操作产生负面影响。
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 secure network is allowed to access and SET (change/create/delete) the objects in this MIB.
SNMPv1本身就是这样一个不安全的环境。即使网络本身是安全的（例如通过使用IPSec），即使如此，也无法控制安全网络上的谁可以访问和设置（更改/创建/删除）此MIB中的对象。
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.
建议实施者考虑SNMPv3框架提供的安全特性。具体而言，建议使用基于用户的安全模型RFC 2574[12]和基于视图的访问控制模型RFC 2575[15]。
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.
然后，客户/用户有责任确保授予此MIB访问权限的SNMP实体正确配置为仅授予具有合法访问权限的主体（用户）访问这些对象的权限。
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 implementers or users of this specification can be obtained from the IETF Secretariat.
IETF对可能声称与本文件所述技术的实施或使用有关的任何知识产权或其他权利的有效性或范围，或此类权利下的任何许可可能或可能不可用的程度，不采取任何立场；它也不表示它已作出任何努力来确定任何此类权利。有关IETF在标准跟踪和标准相关文件中权利的程序信息，请参见BCP-11。可从IETF秘书处获得可供发布的权利声明副本和任何许可证保证，或本规范实施者或用户试图获得使用此类专有权利的一般许可证或许可的结果。
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.
IETF邀请任何相关方提请其注意任何版权、专利或专利申请，或其他可能涉及实施本标准所需技术的专有权利。请将信息发送给IETF执行董事。
This MIB module was updated based on feedback from the IETF's Inter-Domain Multicast Routing (IDMR) Working Group.
该MIB模块是根据IETF域间多播路由（IDMR）工作组的反馈进行更新的。
Keith McCloghrie cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706
Keith McCloghrie cisco Systems，Inc.加利福尼亚州圣何塞西塔斯曼大道170号，邮编95134-1706
Phone: +1 408 526 5260
EMail: kzm@cisco.com
Phone: +1 408 526 5260
EMail: kzm@cisco.com
Dino Farinacci Procket Networks 3850 North First Street San Jose, CA 95134
迪诺·法里纳奇·普罗克特网络公司，加利福尼亚州圣何塞北第一街3850号，邮编95134
Phone: +1 408-954-7909
Email: dino@procket.com
Phone: +1 408-954-7909
Email: dino@procket.com
Dave Thaler Microsoft Corporation One Microsoft Way Redmond, WA 48105-6399
Dave Thaler微软公司华盛顿州雷德蒙微软大道一号，邮编：48105-6399
Phone: +1 425 703 8835
EMail: dthaler@microsoft.com
Phone: +1 425 703 8835
EMail: dthaler@microsoft.com
[1] Wijnen, B., Harrington, D. and R. Presuhn, "An Architecture for Describing SNMP Management Frameworks", RFC 2571, April 1999.
[1] Wijnen，B.，Harrington，D.和R.Presuhn，“描述SNMP管理框架的体系结构”，RFC 2571，1999年4月。
[2] Rose, M. and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based Internets", STD 16, RFC 1155, May 1990.
[2] Rose，M.和K.McCloghrie，“基于TCP/IP的互联网管理信息的结构和识别”，STD 16，RFC 1155，1990年5月。
[3] Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16, RFC 1212, March 1991.
[3] Rose，M.和K.McCloghrie，“简明MIB定义”，STD 16，RFC 1212，1991年3月。
[4] Rose, M., "A Convention for Defining Traps for use with the SNMP", RFC 1215, March 1991.
[4] Rose，M.“定义用于SNMP的陷阱的约定”，RFC1215，1991年3月。
[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.
[5] McCloghrie，K.，Perkins，D.，Schoenwaeld，J.，Case，J.，Rose，M.和S.Waldbusser，“管理信息的结构版本2（SMIv2）”，STD 58，RFC 2578，1999年4月。
[6] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999.
[6] McCloghrie，K.，Perkins，D.，Schoenwaeld，J.，Case，J.，Rose，M.和S.Waldbusser，“SMIv2的文本约定”，STD 58，RFC 2579，1999年4月。
[7] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999.
[7] McCloghrie，K.，Perkins，D.，Schoenwaeld，J.，Case，J.，Rose，M.和S.Waldbusser，“SMIv2的一致性声明”，STD 58，RFC 25801999年4月。
[8] Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple Network Management Protocol", STD 15, RFC 1157, May 1990.
[8] Case，J.，Fedor，M.，Schoffstall，M.和J.Davin，“简单网络管理协议”，STD 15，RFC 1157，1990年5月。
[9] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Introduction to Community-based SNMPv2", RFC 1901, January 1996.
[9] Case，J.，McCloghrie，K.，Rose，M.和S.Waldbusser，“基于社区的SNMPv2简介”，RFC 19011996年1月。
[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.
[10] Case，J.，McCloghrie，K.，Rose，M.和S.Waldbusser，“简单网络管理协议（SNMPv2）版本2的传输映射”，RFC 1906，1996年1月。
[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.
[11] Case，J.，Harrington D.，Presohn R.和B.Wijnen，“简单网络管理协议（SNMP）的消息处理和调度”，RFC 2572，1999年4月。
[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.
[12] Blumenthal，U.和B.Wijnen，“简单网络管理协议（SNMPv3）第3版的基于用户的安全模型（USM）”，RFC 2574，1999年4月。
[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.
[13] Case，J.，McCloghrie，K.，Rose，M.和S.Waldbusser，“简单网络管理协议（SNMPv2）版本2的协议操作”，RFC 1905，1996年1月。
[14] Levi, D., Meyer, P. and B. Stewart, "SNMPv3 Applications", RFC 2573, April 1999.
[14] Levi，D.，Meyer，P.和B.Stewart，“SNMPv3应用”，RFC2573，1999年4月。
[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.
[15] Wijnen，B.，Presuhn，R.和K.McCloghrie，“用于简单网络管理协议（SNMP）的基于视图的访问控制模型（VACM）”，RFC2575，1999年4月。
[16] Deering, S., "Host Extensions for IP Multicasting", STD 5, RFC 1112, August 1989.
[16] Deering，S.，“IP多播的主机扩展”，STD 5，RFC 1112，1989年8月。
[17] Fenner, W., "Internet Group Management Protocol, Version 2", RFC 2236, November 1997.
[17] Fenner，W.，“互联网组管理协议，第2版”，RFC 2236，1997年11月。
Copyright (C) The Internet Society (2000). All Rights Reserved.
版权所有（C）互联网协会（2000年）。版权所有。
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.
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The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns.
上述授予的有限许可是永久性的，互联网协会或其继承人或受让人不会撤销。
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.
本文件和其中包含的信息是按“原样”提供的，互联网协会和互联网工程任务组否认所有明示或暗示的保证，包括但不限于任何保证，即使用本文中的信息不会侵犯任何权利，或对适销性或特定用途适用性的任何默示保证。
Acknowledgement
确认
Funding for the RFC Editor function is currently provided by the Internet Society.
RFC编辑功能的资金目前由互联网协会提供。