Network Working Group J. Chesterfield Request for Comments: 5519 University of Cambridge Obsoletes: 2933, 3019 B. Haberman, Ed. Category: Standards Track JHU/APL April 2009
Multicast Group Membership Discovery MIB
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) 2009 IETF Trust and the persons identified as the document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents in effect on the date of publication of this document (http://trustee.ietf.org/license-info). Please review these documents carefully, as they describe your rights and restrictions with respect to this document.
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 used for managing the Internet Group Management Protocol (IGMP) and the Multicast Listener Discovery (MLD) protocol.
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) version 1 [RFC1112], version 2 [RFC2236], or version 3 [RFC3376] and the Multicast Listener Discovery (MLD) protocol version 1 [RFC2710] or version 2 [RFC3810]. Both protocols provide multicast membership discovery capability. IGMP pertains to IP version 4 clients, and MLD to IP version 6 clients. This version of the MIB obsoletes both RFC 2933 [RFC2933] and RFC 3019 [RFC3019], incorporating a generic interface for both IGMP and MLD implementations and incorporating changes to enable "source filtering" in multicast clients. The MIB encompasses both router and host nodes with relevant management objects defined for each.
For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of RFC 3410 [RFC3410].
Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in STD 58, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580 [RFC2580].
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119].
This Multicast Group Membership Discovery (MGMD) MIB module contains eight tables:
1. the MGMD Host Interface Table, which contains one row for each interface on which IGMP or MLD is enabled on a host,
2. the MGMD Router Interface Table, which contains one row for each interface on which MGMD is enabled on a router,
3. the MGMD Host Cache Table, which contains one row for each IP multicast group for which there are members on a particular interface on a host,
4. the MGMD Router Cache Table, which contains one row for each IP multicast group for which there are members on a particular interface on a router,
5. the reverse MGMD Host Table, which contains one row for each interface for which there are active multicast groups on a host,
6. the reverse MGMD Router Table, which contains one row for each interface for which there are active multicast groups on a router,
7. the MGMD HostSrcList Table, which contains one row for each entry in the source filter record for an interface and multicast group pair on a host, and
8. the MGMD RouterSrcList Table, which contains one row for each entry in the source filter record for an interface and multicast group pair on a router.
All tables are intended for EITHER router OR host functionality as indicated by the name and corresponding description, although it is anticipated that there will be scenarios where both terms might apply to a device, e.g., a router that joins a multicast group also as a host for measurement purposes. The source list tables provide an extension to the cache tables to indicate the source-specific
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includes or excludes associated with each IP multicast group on each specific interface. This functionality is only supported in IGMPv3- and MLDv2-capable nodes.
Incorporated within the MGMD MIB tables are objects for the management of IGMP and MLD proxy devices as described in RFC 4605 [RFC4605]. Proxy devices can be used in simple topologies where it is not necessary to run a full multicast routing protocol. A proxy device can make forwarding decisions based on IGMP or MLD group membership activity.
The MIB references InterfaceIndex and InterfaceIndexOrZero objects as defined in RFC 2863 [RFC2863], the MIB that describes generic objects for network interface sub-layers.
Extensive references to the InetAddress and InetAddressType objects are made as defined in RFC 4001 [RFC4001].
IMPORTS MODULE-IDENTITY, OBJECT-TYPE, mib-2, Counter32, Gauge32, Unsigned32, TimeTicks FROM SNMPv2-SMI InetAddress, InetAddressType FROM INET-ADDRESS-MIB RowStatus FROM SNMPv2-TC MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF InterfaceIndexOrZero, InterfaceIndex FROM IF-MIB;
mgmdStdMIB MODULE-IDENTITY LAST-UPDATED "200903300000Z" -- March 30, 2009 ORGANIZATION "INTERNET ENGINEERING TASK FORCE MULTICAST and ANYCAST GROUP MEMBERSHIP Working Group. www: http://www.ietf.org/html.charters/magma-charter.html EMail: magma@ietf.org" CONTACT-INFO "Julian Chesterfield University of Cambridge, Computer Laboratory, 15 JJ Thompson Avenue, Cambridge, CB3 0FD UK
EMail: julian.chesterfield@cl.cam.ac.uk"
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DESCRIPTION "The MIB module for MGMD management. A new version of MGMD combining RFC 2933 and RFC 3019. Includes IGMPv3 and MLDv2 source filtering changes.
Copyright (c) 2009 IETF Trust and the persons identified as authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
- Neither the name of Internet Society, IETF or IETF Trust, nor the names of specific contributors, may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This version of this MIB module is part of RFC 5519; see the RFC itself for full legal notices."
REVISION "200903300000Z" -- March 30, 2009 DESCRIPTION "This MIB obsoletes both RFC 2933 and RFC 3019."
mgmdHostInterfaceTable OBJECT-TYPE SYNTAX SEQUENCE OF MgmdHostInterfaceEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the interfaces on which IGMP or MLD is enabled."
::= { mgmdMIBObjects 1 }
mgmdHostInterfaceEntry OBJECT-TYPE SYNTAX MgmdHostInterfaceEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) representing an interface on which IGMP or MLD is enabled." INDEX { mgmdHostInterfaceIfIndex, mgmdHostInterfaceQuerierType }
mgmdHostInterfaceIfIndex OBJECT-TYPE SYNTAX InterfaceIndex MAX-ACCESS not-accessible STATUS current DESCRIPTION "The ifIndex value of the interface for which IGMP or MLD is enabled. The table is indexed by the ifIndex value and the InetAddressType to allow for interfaces that may be configured in both IPv4 and IPv6 modes."
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::= { mgmdHostInterfaceEntry 1 }
mgmdHostInterfaceQuerierType OBJECT-TYPE SYNTAX InetAddressType { ipv4(1), ipv6(2) } MAX-ACCESS not-accessible STATUS current DESCRIPTION "The address type of this interface. This entry along with the ifIndex value acts as an index to the mgmdHostInterface table. A physical interface may be configured in multiple modes concurrently, e.g., in IPv4 and IPv6 modes connected to the same interface; however, the traffic is considered to be logically separate."
::= { mgmdHostInterfaceEntry 2 }
mgmdHostInterfaceQuerier OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS read-only STATUS current DESCRIPTION "The address of the IGMP or MLD Querier on the IP subnet to which this interface is attached. The InetAddressType, e.g., IPv4 or IPv6, is identified by the mgmdHostInterfaceQuerierType variable in the mgmdHostInterface table."
::= { mgmdHostInterfaceEntry 3 }
mgmdHostInterfaceStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The activation of a row enables the host side of IGMP or MLD on the interface. The destruction of a row disables the host side of IGMP or MLD on the interface."
::= { mgmdHostInterfaceEntry 4 }
mgmdHostInterfaceVersion OBJECT-TYPE SYNTAX Unsigned32 (1..3) MAX-ACCESS read-create STATUS current DESCRIPTION "The maximum version of MGMD that the host can run on this interface. A value of 1 is only applicable for IPv4, and indicates that the host only supports IGMPv1 on the
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interface. A value of 2 indicates that the host also supports IGMPv2 (for IPv4) or MLDv1 (for IPv6). A value of 3 indicates that the host also supports IGMPv3 (for IPv4) or MLDv2 (for IPv6)." DEFVAL { 3 }
::= { mgmdHostInterfaceEntry 5 }
mgmdHostInterfaceVersion1QuerierTimer 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. This variable applies to IGMPv2 or 3 hosts that are forced to run in v1 for compatibility with v1 routers present on the interface. This object may only be present when the corresponding value of mgmdHostInterfaceQuerierType is ipv4." REFERENCE "RFC 2236, Section 4 and RFC 3376, Section 7.2.1" DEFVAL { 0 }
::= { mgmdHostInterfaceEntry 6 }
mgmdHostInterfaceVersion2QuerierTimer OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The time remaining until the host assumes that there are no MGMDv2 routers present on the interface. While this is non-zero, the host will reply to all queries with version 1 or 2 membership reports. This variable applies to MGMDv3 hosts that are forced to run in v2 for compatibility with v2 hosts or routers present on the interface." REFERENCE "RFC 3376, Section 7.2.1 and RFC 3810, Section 8.2.1" DEFVAL { 0 }
::= { mgmdHostInterfaceEntry 7 }
mgmdHostInterfaceVersion3Robustness OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-create STATUS current
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DESCRIPTION "The robustness variable utilised by an MGMDv3 host in sending state-change reports for multicast routers. To ensure the state-change report is not missed, the host retransmits the state-change report [mgmdHostInterfaceVersion3Robustness - 1] times. The variable must be a non-zero value." REFERENCE "RFC 3376, Section 8.1 and RFC 3810, Section 9.14.1" DEFVAL { 2 }
::= { mgmdHostInterfaceEntry 8 }
-- -- The MGMD Router Interface Table --
mgmdRouterInterfaceTable OBJECT-TYPE SYNTAX SEQUENCE OF MgmdRouterInterfaceEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the interfaces on which IGMP or MLD is enabled."
::= { mgmdMIBObjects 2 }
mgmdRouterInterfaceEntry OBJECT-TYPE SYNTAX MgmdRouterInterfaceEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) representing an interface on which IGMP or MLD is enabled." INDEX { mgmdRouterInterfaceIfIndex, mgmdRouterInterfaceQuerierType }
mgmdRouterInterfaceIfIndex OBJECT-TYPE SYNTAX InterfaceIndex MAX-ACCESS not-accessible STATUS current DESCRIPTION "The ifIndex value of the interface for which IGMP or MLD is enabled. The table is indexed by the ifIndex value and the InetAddressType to allow for interfaces that may be configured in both IPv4 and IPv6 modes."
::= { mgmdRouterInterfaceEntry 1 }
mgmdRouterInterfaceQuerierType OBJECT-TYPE SYNTAX InetAddressType { ipv4(1), ipv6(2) } MAX-ACCESS not-accessible STATUS current DESCRIPTION "The address type of this interface. This entry along with the ifIndex value acts as the index to the mgmdRouterInterface table. A physical interface may be configured in multiple modes concurrently, e.g., in IPv4 and IPv6 modes connected to the same interface; however, the traffic is considered to be logically separate."
::= { mgmdRouterInterfaceEntry 2 }
mgmdRouterInterfaceQuerier OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS read-only STATUS current DESCRIPTION "The address of the IGMP or MLD Querier on the IP subnet to which this interface is attached. The InetAddressType, e.g., IPv4 or IPv6, is identified by the mgmdRouterInterfaceQuerierType variable in the mgmdRouterInterface table."
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::= { mgmdRouterInterfaceEntry 3 }
mgmdRouterInterfaceQueryInterval OBJECT-TYPE SYNTAX Unsigned32 (1..31744) UNITS "seconds" MAX-ACCESS read-create STATUS current DESCRIPTION "The frequency at which IGMP or MLD Host-Query packets are transmitted on this interface." DEFVAL { 125 }
::= { mgmdRouterInterfaceEntry 4 }
mgmdRouterInterfaceStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The activation of a row enables the router side of IGMP or MLD on the interface. The destruction of a row disables the router side of IGMP or MLD on the interface."
::= { mgmdRouterInterfaceEntry 5 }
mgmdRouterInterfaceVersion OBJECT-TYPE SYNTAX Unsigned32 (1..3) MAX-ACCESS read-create STATUS current DESCRIPTION "The version of MGMD that is running on this interface. Value 1 applies to IGMPv1 routers only. Value 2 applies to IGMPv2 and MLDv1 routers, and value 3 applies to IGMPv3 and MLDv2 routers.
This object can be used to configure a router capable of running either version. For IGMP and MLD to function correctly, all routers on a LAN must be configured to run the same version on that LAN." DEFVAL { 3 }
::= { mgmdRouterInterfaceEntry 6 }
mgmdRouterInterfaceQueryMaxResponseTime OBJECT-TYPE SYNTAX Unsigned32 (0..31744) UNITS "tenths of seconds" MAX-ACCESS read-create STATUS current
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DESCRIPTION "The maximum query response interval advertised in MGMDv2 or IGMPv3 queries on this interface." REFERENCE "RFC 3810, Section 9.3" DEFVAL { 100 }
::= { mgmdRouterInterfaceEntry 7 }
mgmdRouterInterfaceQuerierUpTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The time since mgmdRouterInterfaceQuerier was last changed."
::= { mgmdRouterInterfaceEntry 8 }
mgmdRouterInterfaceQuerierExpiryTime 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."
::= { mgmdRouterInterfaceEntry 9 }
mgmdRouterInterfaceWrongVersionQueries OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of general queries received whose IGMP or MLD version does not match the equivalent mgmdRouterInterfaceVersion, over the lifetime of the row entry. Both IGMP and MLD require that all routers on a LAN be configured to run the same version. Thus, if any general queries are received with the wrong version, this indicates a configuration error."
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 can give an indication of the amount of activity between samples over time."
::= { mgmdRouterInterfaceEntry 11 }
mgmdRouterInterfaceProxyIfIndex OBJECT-TYPE SYNTAX InterfaceIndexOrZero MAX-ACCESS read-create STATUS current DESCRIPTION "Some devices implement a form of IGMP or MLD proxying whereby memberships learned on the interface represented by this row cause Host Membership Reports to be sent on the interface whose ifIndex value is given by this object. Such a device would implement the mgmdV2RouterBaseMIBGroup only on its router interfaces (those interfaces with non-zero mgmdRouterInterfaceProxyIfIndex). Typically, the value of this object is 0, indicating that no proxying is being done." DEFVAL { 0 }
::= { mgmdRouterInterfaceEntry 12 }
mgmdRouterInterfaceGroups OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The current number of entries for this interface in the mgmdRouterCacheTable."
::= { mgmdRouterInterfaceEntry 13 }
mgmdRouterInterfaceRobustness OBJECT-TYPE SYNTAX Unsigned32 (1..255) MAX-ACCESS read-create 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 and MLD are robust to (Robustness Variable-1) packet losses." DEFVAL { 2 }
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::= { mgmdRouterInterfaceEntry 14 }
mgmdRouterInterfaceLastMemberQueryInterval OBJECT-TYPE SYNTAX Unsigned32 (0..31744) UNITS "tenths of seconds" MAX-ACCESS read-create STATUS current DESCRIPTION "The Last Member Query Interval is the Max Query Response Interval 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 mgmdRouterInterfaceVersion is 1." DEFVAL { 10 }
::= { mgmdRouterInterfaceEntry 15 }
mgmdRouterInterfaceLastMemberQueryCount OBJECT-TYPE SYNTAX Unsigned32 (1..255) MAX-ACCESS read-only STATUS current DESCRIPTION "Represents the number of group-specific and group-and- source-specific queries sent by the router before it assumes there are no local members."
::= { mgmdRouterInterfaceEntry 16 }
mgmdRouterInterfaceStartupQueryCount OBJECT-TYPE SYNTAX Unsigned32 (1..255) MAX-ACCESS read-only STATUS current DESCRIPTION "Represents the number of Queries sent out on startup, separated by the Startup Query Interval."
::= { mgmdRouterInterfaceEntry 17 }
mgmdRouterInterfaceStartupQueryInterval OBJECT-TYPE SYNTAX Unsigned32 (0..31744) UNITS "seconds" MAX-ACCESS read-only STATUS current
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DESCRIPTION "This variable represents the interval between General Queries sent by a Querier on startup."
::= { mgmdRouterInterfaceEntry 18 }
-- -- The MGMD Host Cache Table --
mgmdHostCacheTable OBJECT-TYPE SYNTAX SEQUENCE OF MgmdHostCacheEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the IP multicast groups for which the host is a member on a particular interface."
::= { mgmdMIBObjects 3 }
mgmdHostCacheEntry OBJECT-TYPE SYNTAX MgmdHostCacheEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the mgmdHostCacheTable." INDEX { mgmdHostCacheAddressType, mgmdHostCacheAddress, mgmdHostCacheIfIndex }
mgmdHostCacheAddressType OBJECT-TYPE SYNTAX InetAddressType { ipv4(1), ipv6(2) } MAX-ACCESS not-accessible STATUS current DESCRIPTION "The address type of the mgmdHostCacheTable entry. This value applies to both the mgmdHostCacheAddress and the mgmdHostCacheLastReporter entries."
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::= { mgmdHostCacheEntry 1 }
mgmdHostCacheAddress OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The IP multicast group address for which this entry contains information. The InetAddressType, e.g., IPv4 or IPv6, is identified by the mgmdHostCacheAddressType variable in the mgmdHostCache table."
::= { mgmdHostCacheEntry 2 }
mgmdHostCacheIfIndex 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."
::= { mgmdHostCacheEntry 3 }
mgmdHostCacheUpTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The time elapsed since this entry was created."
::= { mgmdHostCacheEntry 4 }
mgmdHostCacheLastReporter OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) 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 a value of 0. The InetAddressType, e.g., IPv4 or IPv6, is identified by the mgmdHostCacheAddressType variable in the mgmdHostCache table."
::= { mgmdHostCacheEntry 5 }
mgmdHostCacheSourceFilterMode OBJECT-TYPE
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SYNTAX INTEGER {include (1), exclude (2) } MAX-ACCESS read-only STATUS current DESCRIPTION "The state in which the interface is currently set. The value indicates the relevance of the corresponding source list entries in the mgmdHostSecListTable for MGMDv3 interfaces."
::= { mgmdHostCacheEntry 6 }
-- -- The MGMD Router Cache Table --
mgmdRouterCacheTable OBJECT-TYPE SYNTAX SEQUENCE OF MgmdRouterCacheEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the IP multicast groups for which there are members on a particular router interface."
::= { mgmdMIBObjects 4 }
mgmdRouterCacheEntry OBJECT-TYPE SYNTAX MgmdRouterCacheEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the mgmdRouterCacheTable."
INDEX { mgmdRouterCacheAddressType, mgmdRouterCacheAddress, mgmdRouterCacheIfIndex }
mgmdRouterCacheAddressType OBJECT-TYPE SYNTAX InetAddressType { ipv4(1), ipv6(2) } MAX-ACCESS not-accessible STATUS current DESCRIPTION "The address type of the mgmdRouterCacheTable entry. This value applies to both the mgmdRouterCacheAddress and the mgmdRouterCacheLastReporter entries."
::= { mgmdRouterCacheEntry 1 }
mgmdRouterCacheAddress OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The IP multicast group address for which this entry contains information. The InetAddressType, e.g., IPv4 or IPv6, is identified by the mgmdRouterCacheAddressType variable in the mgmdRouterCache table."
::= { mgmdRouterCacheEntry 2 }
mgmdRouterCacheIfIndex 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."
::= { mgmdRouterCacheEntry 3 }
mgmdRouterCacheLastReporter OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) 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. The InetAddressType, e.g., IPv4 or IPv6, is identified by the mgmdRouterCacheAddressType variable in the mgmdRouterCache table."
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::= { mgmdRouterCacheEntry 4 }
mgmdRouterCacheUpTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The time elapsed since this entry was created."
::= { mgmdRouterCacheEntry 5 }
mgmdRouterCacheExpiryTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "This value represents the time remaining before the Group Membership Interval state expires. The value must always be greater than or equal to 1."
::= { mgmdRouterCacheEntry 6 }
mgmdRouterCacheExcludeModeExpiryTimer OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "This value is applicable only to MGMDv3-compatible nodes and represents the time remaining before the interface EXCLUDE state expires and the interface state transitions to INCLUDE mode. This value can never be greater than mgmdRouterCacheExpiryTime."
::= { mgmdRouterCacheEntry 7 }
mgmdRouterCacheVersion1HostTimer 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 MGMD version 1 members on the IP subnet attached to this interface. This entry only applies to IGMPv1 hosts, and is not implemented for MLD. Upon hearing any MGMDv1 Membership Report (IGMPv1 only), this value is reset to the group membership timer. While this
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time remaining is non-zero, the local router ignores any MGMDv2 Leave messages (IGMPv2 only) for this group that it receives on this interface."
::= { mgmdRouterCacheEntry 8 }
mgmdRouterCacheVersion2HostTimer 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 MGMD version 2 members on the IP subnet attached to this interface. This entry applies to both IGMP and MLD hosts. Upon hearing any MGMDv2 Membership Report, this value is reset to the group membership timer. Assuming no MGMDv1 hosts have been detected, the local router does not ignore any MGMDv2 Leave messages for this group that it receives on this interface."
::= { mgmdRouterCacheEntry 9 }
mgmdRouterCacheSourceFilterMode OBJECT-TYPE SYNTAX INTEGER {include (1), exclude (2) } MAX-ACCESS read-only STATUS current DESCRIPTION "The current cache state, applicable to MGMDv3-compatible nodes. The value indicates whether the state is INCLUDE or EXCLUDE."
::= { mgmdRouterCacheEntry 10 }
-- -- The MGMD Inverse Host interface/cache lookup Table --
mgmdInverseHostCacheTable OBJECT-TYPE SYNTAX SEQUENCE OF MgmdInverseHostCacheEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the interfaces that are members of a particular group. This is an inverse lookup table for entries in the mgmdHostCacheTable."
::= { mgmdMIBObjects 5 }
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mgmdInverseHostCacheEntry OBJECT-TYPE SYNTAX MgmdInverseHostCacheEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the mgmdInverseHostCacheTable." INDEX { mgmdInverseHostCacheIfIndex, mgmdInverseHostCacheAddressType, mgmdInverseHostCacheAddress}
mgmdInverseHostCacheIfIndex OBJECT-TYPE SYNTAX InterfaceIndex MAX-ACCESS not-accessible STATUS current DESCRIPTION "The interface for which this entry contains information."
::= { mgmdInverseHostCacheEntry 1 }
mgmdInverseHostCacheAddressType OBJECT-TYPE SYNTAX InetAddressType { ipv4(1), ipv6(2) } MAX-ACCESS not-accessible STATUS current DESCRIPTION "The address type of the mgmdInverseHostCacheTable entry."
::= { mgmdInverseHostCacheEntry 2 }
mgmdInverseHostCacheAddress OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS read-only STATUS current DESCRIPTION "The IP multicast group address for which this entry contains information about an interface. The InetAddressType, e.g., IPv4 or IPv6, is identified by the mgmdInverseHostCacheAddressType variable in the mgmdInverseHostCache table."
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::= { mgmdInverseHostCacheEntry 3 }
-- -- The MGMD Inverse Router interface/cache lookup Table --
mgmdInverseRouterCacheTable OBJECT-TYPE SYNTAX SEQUENCE OF MgmdInverseRouterCacheEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the interfaces that are members of a particular group. This is an inverse lookup table for entries in the mgmdRouterCacheTable."
::= { mgmdMIBObjects 6 }
mgmdInverseRouterCacheEntry OBJECT-TYPE SYNTAX MgmdInverseRouterCacheEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the mgmdInverseRouterCacheTable." INDEX { mgmdInverseRouterCacheIfIndex, mgmdInverseRouterCacheAddressType, mgmdInverseRouterCacheAddress }
mgmdInverseRouterCacheIfIndex 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."
MAX-ACCESS not-accessible STATUS current DESCRIPTION "The address type of the mgmdInverseRouterCacheTable entry."
::= { mgmdInverseRouterCacheEntry 2 }
mgmdInverseRouterCacheAddress OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS read-only STATUS current DESCRIPTION "The IP multicast group address for which this entry contains information. The InetAddressType, e.g., IPv4 or IPv6, is identified by the mgmdInverseRouterCacheAddressType variable in the mgmdInverseRouterCache table."
::= { mgmdInverseRouterCacheEntry 3 }
-- -- The MGMD Host Source list Table --
mgmdHostSrcListTable OBJECT-TYPE SYNTAX SEQUENCE OF MgmdHostSrcListEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the Source List entries corresponding to each interface and multicast group pair on a host."
::= { mgmdMIBObjects 7 }
mgmdHostSrcListEntry OBJECT-TYPE SYNTAX MgmdHostSrcListEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the mgmdHostSrcListTable." INDEX { mgmdHostSrcListAddressType, mgmdHostSrcListAddress, mgmdHostSrcListIfIndex, mgmdHostSrcListHostAddress }
mgmdHostSrcListAddressType OBJECT-TYPE SYNTAX InetAddressType { ipv4(1), ipv6(2) } MAX-ACCESS not-accessible STATUS current DESCRIPTION "The address type of the InetAddress variables in this table. This value applies to the mgmdHostSrcListHostAddress and mgmdHostSrcListAddress entries."
::= { mgmdHostSrcListEntry 1 }
mgmdHostSrcListAddress OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The IP multicast group address for which this entry contains information."
::= { mgmdHostSrcListEntry 2 }
mgmdHostSrcListIfIndex 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."
::= { mgmdHostSrcListEntry 3 }
mgmdHostSrcListHostAddress OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The host address to which this entry corresponds. The mgmdHostCacheSourceFilterMode value for this group address and interface indicates whether this host address is included or excluded."
::= { mgmdHostSrcListEntry 4 }
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mgmdHostSrcListExpire OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "This value indicates the relevance of the SrcList entry, whereby a non-zero value indicates this is an INCLUDE state value, and a zero value indicates this to be an EXCLUDE state value."
::= { mgmdHostSrcListEntry 5 }
-- -- The MGMD Router Source list Table --
mgmdRouterSrcListTable OBJECT-TYPE SYNTAX SEQUENCE OF MgmdRouterSrcListEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the Source List entries corresponding to each interface and multicast group pair on a Router."
::= { mgmdMIBObjects 8 }
mgmdRouterSrcListEntry OBJECT-TYPE SYNTAX MgmdRouterSrcListEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the mgmdRouterSrcListTable." INDEX { mgmdRouterSrcListAddressType, mgmdRouterSrcListAddress, mgmdRouterSrcListIfIndex, mgmdRouterSrcListHostAddress }
mgmdRouterSrcListAddressType OBJECT-TYPE SYNTAX InetAddressType { ipv4(1), ipv6(2) } MAX-ACCESS not-accessible STATUS current DESCRIPTION "The address type of the InetAddress variables in this table. This value applies to the mgmdRouterSrcListHostAddress and mgmdRouterSrcListAddress entries."
::= { mgmdRouterSrcListEntry 1 }
mgmdRouterSrcListAddress OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The IP multicast group address for which this entry contains information."
::= { mgmdRouterSrcListEntry 2 }
mgmdRouterSrcListIfIndex 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."
::= { mgmdRouterSrcListEntry 3 }
mgmdRouterSrcListHostAddress OBJECT-TYPE SYNTAX InetAddress (SIZE(4|16)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The host address to which this entry corresponds. The mgmdRouterCacheSourceFilterMode value for this group address and interface indicates whether this host address is included or excluded."
::= { mgmdRouterSrcListEntry 4 }
mgmdRouterSrcListExpire OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current
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DESCRIPTION "This value indicates the relevance of the SrcList entry, whereby a non-zero value indicates this is an INCLUDE state value, and a zero value indicates this to be an EXCLUDE state value."
-- Read Compliance statement for IGMPv1 Hosts -- IGMPv1 only supports the IPv4 Address Family
mgmdIgmpV1HostReadMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "A read-only compliance statement for hosts running IGMPv1 [RFC1112] and implementing the MGMD MIB. IGMPv1 hosts must support the IPv4 address type." MODULE -- this module MANDATORY-GROUPS { mgmdHostBaseMIBGroup }
OBJECT mgmdHostInterfaceStatus SYNTAX RowStatus {active(1)} MIN-ACCESS read-only DESCRIPTION "Read-write or read-create access is not required and only the value 'active(1)' needs to be supported."
OBJECT mgmdHostInterfaceVersion SYNTAX Unsigned32 (1) MIN-ACCESS read-only DESCRIPTION "Write access is not required. Only version 1 needs to be supported."
GROUP mgmdHostExtendedMIBGroup DESCRIPTION "Supporting this group can be especially useful in an environment with a router that does not support the MGMD MIB."
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::= { mgmdMIBCompliance 1 }
-- Read Compliance statement for IGMPv1 Routers -- IGMPv1 only supports the IPv4 Address Family
mgmdIgmpV1RouterReadMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "A read-only compliance statement for routers running IGMPv1 [RFC1112] and implementing the MGMD MIB. IGMPv1 routers only support the IPv4 address type.
Non-accessible index objects that only need IPv4 support are:
MIN-ACCESS read-only DESCRIPTION "Write access is not required. Only version 1 needs to be supported."
OBJECT mgmdRouterInterfaceStatus SYNTAX RowStatus {active(1)} MIN-ACCESS read-only DESCRIPTION "Read-write or read-create access is not required and only the value 'active(1)' needs to be supported."
OBJECT mgmdRouterInterfaceQueryInterval MIN-ACCESS read-only DESCRIPTION "Write access is not required."
::= { mgmdMIBCompliance 2 }
-- Write Compliance statement for IGMPv1 Routers -- IGMPv1 only supports the IPv4 Address Family
mgmdIgmpV1RouterWriteMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "A read-create compliance statement for routers running IGMPv1 [RFC1112] and implementing the MGMD MIB. IGMPv1 routers only support the IPv4 address type.
Non-accessible index objects that only need IPv4 support are:
OBJECT mgmdRouterInterfaceVersion SYNTAX Unsigned32 (1) DESCRIPTION "Write access is not required. Only version 1 needs to be supported."
::= { mgmdMIBCompliance 3 }
-- Read Compliance statement for IGMPv2 and MLDv1 Hosts -- IGMPv2 only supports the IPv4 Address Family -- MLDv1 only supports the IPv6 Address Family
mgmdIgmpV2MldV1HostReadMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "A read-only compliance statement for hosts running IGMPv2 [RFC2236] or MLDv1 [RFC2710] and implementing the MGMD MIB. IGMPv2 hosts only support the IPv4 address type and MLDv1 hosts only support the IPv6 address type." MODULE -- this module MANDATORY-GROUPS { mgmdHostBaseMIBGroup, mgmdV2HostMIBGroup }
OBJECT mgmdHostInterfaceStatus SYNTAX RowStatus {active(1)} MIN-ACCESS read-only DESCRIPTION "Read-write or read-create access is not required and only the value 'active(1)' needs to be supported."
MIN-ACCESS read-only DESCRIPTION "Write access is not required. Only versions 1 and 2 need to be supported."
GROUP mgmdHostExtendedMIBGroup DESCRIPTION "Supporting this group can be especially useful in an environment with a router that does not support the MGMD MIB."
::= { mgmdMIBCompliance 4 }
-- Write Compliance statement for IGMPv2 and MLDv1 Hosts -- IGMPv2 only supports the IPv4 Address Family -- MLDv1 only supports the IPv6 Address Family
mgmdIgmpV2MldV1HostWriteMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "A read-create compliance statement for hosts running IGMPv2 [RFC2236] or MLDv1 [RFC2710] and implementing the MGMD MIB. IGMPv2 hosts only support the IPv4 address type and MLDv1 hosts only support the IPv6 address type." MODULE -- this module MANDATORY-GROUPS { mgmdHostBaseMIBGroup, mgmdV2HostMIBGroup } OBJECT mgmdHostInterfaceVersion SYNTAX Unsigned32 (1..2) DESCRIPTION "Only versions 1 and 2 need to be supported."
::= { mgmdMIBCompliance 5 }
-- Read Compliance statement for IGMPv2 and MLDv1 Routers -- IGMPv2 only supports the IPv4 Address Family -- MLDv1 only supports the IPv6 Address Family
mgmdIgmpV2MldV1RouterReadMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "A read-only compliance statement for routers running IGMPv2 [RFC2236] or MLDv1 [RFC2710] and implementing the MGMD MIB. IGMPv2 routers only support the IPv4 address type and MLDv1 routers only support the IPv6 address type." MODULE -- this module MANDATORY-GROUPS { mgmdRouterBaseMIBGroup,
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mgmdV2RouterBaseMIBGroup }
OBJECT mgmdRouterInterfaceLastMemberQueryInterval MIN-ACCESS read-only DESCRIPTION "Write access is not required."
OBJECT mgmdRouterInterfaceRobustness MIN-ACCESS read-only DESCRIPTION "Write access is not required."
OBJECT mgmdRouterInterfaceQueryMaxResponseTime MIN-ACCESS read-only DESCRIPTION "Write access is not required."
OBJECT mgmdRouterInterfaceVersion SYNTAX Unsigned32 (1..2) MIN-ACCESS read-only DESCRIPTION "Write access is not required. Only versions 1 and 2 need to be supported."
OBJECT mgmdRouterInterfaceStatus SYNTAX RowStatus {active(1)} MIN-ACCESS read-only DESCRIPTION "Read-write or read-create access is not required and only the value 'active(1)' needs to be supported."
OBJECT mgmdRouterInterfaceQueryInterval MIN-ACCESS read-only DESCRIPTION "Write access is not required."
GROUP mgmdV2ProxyMIBGroup DESCRIPTION "Write access is not required."
::= { mgmdMIBCompliance 6 }
-- Write Compliance statement for IGMPv2, IGMPv3, MLDv1, and MLDv2 -- Routers -- IGMPv2 and IGMPv3 only support the IPv4 Address Family -- MLDv1 and MLDv2 only support the IPv6 Address Family
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mgmdIgmpV2V3MldV1V2RouterWriteMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "A read-create compliance statement for routers running IGMPv2 [RFC2236], IGMPv3 [RFC3376], MLDv1 [RFC2710], or MLDv2 [RFC3810] and implementing the MGMD MIB. IGMPv2 and IGMPv3 routers only support the IPv4 address type, while MLDv1 and MLDv2 routers only support the IPv6 address type." MODULE -- this module MANDATORY-GROUPS { mgmdRouterBaseMIBGroup, mgmdV2RouterBaseMIBGroup }
GROUP mgmdV2ProxyMIBGroup DESCRIPTION "Read-create access is required."
::= { mgmdMIBCompliance 7 }
-- Read Compliance statement for IGMPv2, IGMPv3, MLDv1, and MLDv2 Hosts -- IGMPv2 and IGMPv3 only support the IPv4 Address Family -- MLDv1 and MLDv2 only support the IPv6 Address Family
mgmdIgmpV3MldV2HostReadMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for hosts running IGMPv3 [RFC3376] or MLDv2 [RFC3810] and implementing the MGMD MIB. IGMPv3 hosts only support the IPv4 address type and MLDv2 hosts only support the IPv6 address type." MODULE -- this module MANDATORY-GROUPS { mgmdHostBaseMIBGroup, mgmdV2HostMIBGroup, mgmdV3HostMIBGroup }
OBJECT mgmdHostInterfaceVersion MIN-ACCESS read-only DESCRIPTION "Write access is not required."
OBJECT mgmdHostInterfaceStatus SYNTAX RowStatus {active(1)} MIN-ACCESS read-only DESCRIPTION "Read-write or read-create access is not required and only the value 'active(1)' needs to be supported."
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OBJECT mgmdHostInterfaceVersion3Robustness MIN-ACCESS read-only DESCRIPTION "Write access is not required."
GROUP mgmdHostExtendedMIBGroup DESCRIPTION "Supporting this group can be especially useful in an environment with a router that does not support the MGMD MIB."
::= { mgmdMIBCompliance 8 }
-- Write Compliance statement for IGMPv2, IGMPv3, MLDv1, and MLDv2 Hosts -- IGMPv2 and IGMPv3 only support the IPv4 Address Family -- MLDv1 and MLDv2 only support the IPv6 Address Family
mgmdIgmpV3MldV2HostWriteMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for hosts running IGMPv3 [RFC3376] or MLDv2 [RFC3810] and implementing the MGMD MIB. IGMPv3 hosts only support the IPv4 address type and MLDv2 hosts only support the IPv6 address type." MODULE -- this module MANDATORY-GROUPS { mgmdHostBaseMIBGroup, mgmdV2HostMIBGroup,
mgmdV3HostMIBGroup }
GROUP mgmdHostExtendedMIBGroup DESCRIPTION "Supporting this group can be especially useful in an environment with a router that does not support the MGMD MIB."
::= { mgmdMIBCompliance 9 }
-- Read Compliance statement for IGMPv2, IGMPv3, MLDv1, and MLDv2 -- Routers -- IGMPv2 and IGMPv3 only support the IPv4 Address Family -- MLDv1 and MLDv2 only support the IPv6 Address Family
mgmdIgmpV3MldV2RouterReadMIBCompliance MODULE-COMPLIANCE STATUS current
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DESCRIPTION "A read-only compliance statement for routers running IGMPv3 [RFC3376] or MLDv2 [RFC3810] and implementing the MGMD MIB. IGMPv3 routers only support the IPv4 address type and MLDv2 routers only support the IPv6 address type." MODULE -- this module MANDATORY-GROUPS { mgmdRouterBaseMIBGroup, mgmdV2RouterBaseMIBGroup, mgmdV3RouterMIBGroup }
OBJECT mgmdRouterInterfaceLastMemberQueryInterval MIN-ACCESS read-only DESCRIPTION "Write access is not required."
OBJECT mgmdRouterInterfaceRobustness MIN-ACCESS read-only DESCRIPTION "Write access is not required."
OBJECT mgmdRouterInterfaceQueryMaxResponseTime MIN-ACCESS read-only DESCRIPTION "Write access is not required."
OBJECT mgmdRouterInterfaceVersion MIN-ACCESS read-only DESCRIPTION "Write access is not required."
OBJECT mgmdRouterInterfaceStatus SYNTAX RowStatus {active(1)} MIN-ACCESS read-only DESCRIPTION "Read-write or read-create access is not required and only the value 'active(1)' needs to be supported."
OBJECT mgmdRouterInterfaceQueryInterval MIN-ACCESS read-only DESCRIPTION "Write access is not required."
GROUP mgmdV2ProxyMIBGroup DESCRIPTION "Write access is not required."
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::= { mgmdMIBCompliance 10 }
-- units of conformance
mgmdHostBaseMIBGroup OBJECT-GROUP OBJECTS { mgmdHostInterfaceStatus, mgmdHostInterfaceVersion } STATUS current DESCRIPTION "The basic collection of objects providing management of MGMD version 1, 2, or 3 for hosts."
::= { mgmdMIBGroups 1 }
mgmdRouterBaseMIBGroup OBJECT-GROUP OBJECTS { mgmdRouterInterfaceStatus, mgmdRouterInterfaceQueryInterval, mgmdRouterCacheUpTime, mgmdRouterCacheExpiryTime, mgmdRouterInterfaceVersion, mgmdRouterInterfaceJoins, mgmdRouterInterfaceGroups, mgmdRouterCacheLastReporter, mgmdRouterInterfaceQuerierUpTime, mgmdRouterInterfaceQuerierExpiryTime, mgmdRouterInterfaceQuerier, mgmdInverseRouterCacheAddress } STATUS current DESCRIPTION "The basic collection of objects providing management of MGMD version 1, 2, or 3 for routers."
::= { mgmdMIBGroups 2 }
mgmdV2HostMIBGroup OBJECT-GROUP OBJECTS { mgmdHostInterfaceVersion1QuerierTimer } STATUS current DESCRIPTION "A collection of additional read-only objects for management of IGMP version 2 in hosts for MGMD version 2 compliance."
::= { mgmdMIBGroups 3 }
mgmdHostExtendedMIBGroup OBJECT-GROUP OBJECTS { mgmdHostCacheLastReporter, mgmdHostCacheUpTime, mgmdHostInterfaceQuerier, mgmdInverseHostCacheAddress } STATUS current
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DESCRIPTION "A collection of optional objects for MGMD hosts."
::= { mgmdMIBGroups 4 }
mgmdV2RouterBaseMIBGroup OBJECT-GROUP OBJECTS { mgmdRouterInterfaceWrongVersionQueries, mgmdRouterInterfaceLastMemberQueryCount, mgmdRouterInterfaceStartupQueryCount, mgmdRouterInterfaceStartupQueryInterval, mgmdRouterCacheVersion1HostTimer, mgmdRouterInterfaceQueryMaxResponseTime, mgmdRouterInterfaceRobustness, mgmdRouterInterfaceLastMemberQueryInterval } STATUS current DESCRIPTION "A collection of additional read-only objects for management of MGMD version 2 in routers."
::= { mgmdMIBGroups 5 }
mgmdV2ProxyMIBGroup OBJECT-GROUP OBJECTS { mgmdRouterInterfaceProxyIfIndex } STATUS current DESCRIPTION "A collection of additional read-create objects for management of MGMD proxy devices."
::= { mgmdMIBGroups 6 }
mgmdV3HostMIBGroup OBJECT-GROUP OBJECTS { mgmdHostInterfaceVersion2QuerierTimer, mgmdHostCacheSourceFilterMode, mgmdHostInterfaceVersion3Robustness, mgmdHostSrcListExpire } STATUS current DESCRIPTION "A collection of additional objects for management of MGMD version 3 in hosts."
mgmdRouterSrcListExpire } STATUS current DESCRIPTION "A collection of additional read-only objects for management of MGMD version 3 in routers."
::= { mgmdMIBGroups 8 }
END
6. Security Considerations
There are a number of management objects defined in this MIB module with a MAX-ACCESS clause of read-write and/or read-create. Such objects 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. These are the tables and objects and their sensitivity/vulnerability:
o The mgmdRouterInterfaceTable provides read-create access to 2 values: the mgmdRouterInterfaceStatus and the mgmdRouterInterfaceQueryInterval. The mgmdRouterInterfaceStatus presents a remote user with the ability to enable or disable multicast support on a given router interface, and therefore presents a significant denial-of-service vulnerability. The mgmdRouterInterfaceQueryInterval controls the frequency with which host-query packets are sent, providing less of a vulnerability, but still requiring secure access control.
o The mgmdRouterCacheTable also provides access to read-create objects. The mgmdRouterInterfaceVersion controls the protocol conformance of an interface, and is therefore a potential denial- of-service vulnerability. The mgmdRouterInterfaceQueryMaxResponseTime, the mgmdRouterInterfaceRobustness, and the mgmdRouterInterfaceLastMemberQueryInterval are all tuning parameters to control the characteristic of the host-query packets. Compromise of these objects can potentially be disruptive to local multicast communication.
o The mgmdHostInterfaceTable provides a read-create object, the mgmdHostInterfaceVersion3Robustness, which controls the robustness of the interface to packet loss. Disabling robustness in the face of packet loss could cause denial of service to hosts; however, in general this presents a low risk.
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SNMP versions prior to SNMPv3 did not include adequate security. 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 module.
It is RECOMMENDED that implementers consider the security features as provided by the SNMPv3 framework (see [RFC3410], section 8), including full support for the SNMPv3 cryptographic mechanisms (for authentication and privacy).
Further, deployment of SNMP versions prior to SNMPv3 is NOT RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to enable cryptographic security. It is then a customer/operator responsibility to ensure that the SNMP entity giving access to an instance of this MIB module is properly configured to give access to the objects only to those principals (users) that have legitimate rights to indeed GET or SET (change/create/delete) them.
This MIB introduces a new term to refer to two existing multicast protocols: Multicast Group Membership Discovery. It encompasses both the IPv4 Multicast discovery protocol, IGMP, and the IPv6 Multicast discovery protocol, MLD, as defined in RFCs 2933 [RFC2933] and 3019 [RFC3019], respectively.
The MIB module in this document uses the following IANA-assigned OBJECT IDENTIFIER value recorded in the SMI Numbers registry:
[RFC1112] Deering, S., "Host extensions for IP multicasting", STD 5, RFC 1112, August 1989.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2236] Fenner, W., "Internet Group Management Protocol, Version 2", RFC 2236, November 1997.
[RFC2578] McCloghrie, K., Ed., Perkins, D., Ed., and J. Schoenwaelder, Ed., "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Ed., Perkins, D., Ed., and J. Schoenwaelder, Ed., "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999.
[RFC2580] McCloghrie, K., Perkins, D., and J. Schoenwaelder, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999.
[RFC2710] Deering, S., Fenner, W., and B. Haberman, "Multicast Listener Discovery (MLD) for IPv6", RFC 2710, October 1999.
[RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB", RFC 2863, June 2000.
[RFC3376] Cain, B., Deering, S., Kouvelas, I., Fenner, B., and A. Thyagarajan, "Internet Group Management Protocol, Version 3", RFC 3376, October 2002.
[RFC3810] Vida, R. and L. Costa, "Multicast Listener Discovery Version 2 (MLDv2) for IPv6", RFC 3810, June 2004.
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[RFC4001] Daniele, M., Haberman, B., Routhier, S., and J. Schoenwaelder, "Textual Conventions for Internet Network Addresses", RFC 4001, February 2005.
[RFC2933] McCloghrie, K., Farinacci, D., and D. Thaler, "Internet Group Management Protocol MIB", RFC 2933, October 2000.
[RFC3019] Haberman, B. and R. Worzella, "IP Version 6 Management Information Base for The Multicast Listener Discovery Protocol", RFC 3019, January 2001.
[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction and Applicability Statements for Internet- Standard Management Framework", RFC 3410, December 2002.
[RFC4605] Fenner, B., He, H., Haberman, B., and H. Sandick, "Internet Group Management Protocol (IGMP) / Multicast Listener Discovery (MLD)-Based Multicast Forwarding ("IGMP/MLD Proxying")", RFC 4605, August 2006.
Authors' Addresses
Julian Chesterfield University of Cambridge 15 JJ Thompson Avenue Cambridge CB3 0FD UK
EMail: julian.chesterfield@cl.cam.ac.uk
Brian Haberman (editor) Johns Hopkins University / Applied Physics Laboratory 11100 Johns Hopkins Road Laurel, MD 20723 USA