Network Working Group B. Joshi
Request for Comments: 5240 Infosys Technologies Ltd.
Category: Standards Track R. Bijlani
June 2008
Protocol Independent Multicast (PIM) Bootstrap Router 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.
Abstract
This document defines a portion of the Management Information Base
(MIB) for use with network management protocols in the Internet
community. In particular, it describes managed objects used for
managing the Bootstrap Router (BSR) mechanism for PIM (Protocol
Independent Multicast).
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. The Internet-Standard Management Framework . . . . . . . . . . 2
3. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 2
4. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
5. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 3
6. Security Considerations . . . . . . . . . . . . . . . . . . . 17
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 19
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 19
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9.1. Normative References . . . . . . . . . . . . . . . . . . . 20
9.2. Informative References . . . . . . . . . . . . . . . . . . 20
Joshi & Bijlani Standards Track [Page 1]
RFC 5240 PIM BSR MIB June 2008 1. Introduction 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 managed objects used for managing the Bootstrap Router (BSR) mechanism for PIM [RFC4601], [RFC5059]. This document was created by moving some of the PIM BSR-specific MIB tables from one of the earlier versions of PIM MIB [RFC5060]. 2. The Internet-Standard Management Framework 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]. 3. Conventions 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]. 4. Overview This MIB module contains four tables. The tables are: 1. The Candidate-RP Table, which contains one row for each multicast group address prefix for which the local router is configured to advertise itself as a Candidate-RP (C-RP). This table exists on routers that are configured as Candidate-RP. 2. The Elected BSR RP-Set Table, which contains one row for each Group-to-RP mapping that was received in C-RP advertisements. This table exists on a router that is an elected BSR (E-BSR). 3. The Candidate-BSR Table, which contains one row for each Candidate-BSR configuration for the local router. This table exists on routers that are configured as Candidate-BSR. Joshi & Bijlani Standards Track [Page 2]
RFC 5240 PIM BSR MIB June 2008 4. The Elected-BSR Table, which contains one row for each elected BSR. This table exists on a router that is an elected BSR. This MIB module uses textual conventions defined in the INET-ADDRESS- MIB [RFC4001]. 5. Definitions PIM-BSR-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, mib-2, Unsigned32, TimeTicks FROM SNMPv2-SMI RowStatus, TruthValue, StorageType FROM SNMPv2-TC MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP FROM SNMPv2-CONF InetAddressType, InetAddressPrefixLength, InetAddress, InetZoneIndex FROM INET-ADDRESS-MIB; pimBsrMIB MODULE-IDENTITY LAST-UPDATED "200805280000Z" -- 28 May 2008 ORGANIZATION "IETF Protocol Independent Multicast (PIM) Working Group" CONTACT-INFO "Email: pim@ietf.org WG charter: http://www.ietf.org/html.charters/pim-charter.html" DESCRIPTION "The MIB module for management of the Bootstrap Router (BSR) mechanism for PIM routers. Copyright (C) The IETF Trust (2008). This version of this MIB module is part of RFC 5240; see the RFC itself for full legal notices." REVISION "200805280000Z" -- 28 May 2008 DESCRIPTION "Initial version, published as RFC 5240." ::= { mib-2 172 } -- -- Top-level structure -- pimBsrNotifications OBJECT IDENTIFIER ::= { pimBsrMIB 0 } pimBsrObjects OBJECT IDENTIFIER ::= { pimBsrMIB 1 } Joshi & Bijlani Standards Track [Page 3]
RFC 5240 PIM BSR MIB June 2008 -- -- Conformance Information -- pimBsrConformance OBJECT IDENTIFIER ::= { pimBsrMIB 2 } pimBsrCompliances OBJECT IDENTIFIER ::= { pimBsrConformance 1 } pimBsrGroups OBJECT IDENTIFIER ::= { pimBsrConformance 2 } -- -- The BSR Candidate-RP Table -- pimBsrCandidateRPTable OBJECT-TYPE SYNTAX SEQUENCE OF PimBsrCandidateRPEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing the IP multicast group prefixes for which the local router is to advertise itself as a Candidate-RP." ::= { pimBsrObjects 1 } pimBsrCandidateRPEntry OBJECT-TYPE SYNTAX PimBsrCandidateRPEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the pimBsrCandidateRPTable." INDEX { pimBsrCandidateRPAddressType, pimBsrCandidateRPAddress, pimBsrCandidateRPGroupAddress, pimBsrCandidateRPGroupPrefixLength } ::= { pimBsrCandidateRPTable 1 } PimBsrCandidateRPEntry ::= SEQUENCE { pimBsrCandidateRPAddressType InetAddressType, pimBsrCandidateRPAddress InetAddress, pimBsrCandidateRPGroupAddress InetAddress, pimBsrCandidateRPGroupPrefixLength InetAddressPrefixLength, pimBsrCandidateRPBidir TruthValue, pimBsrCandidateRPAdvTimer TimeTicks, pimBsrCandidateRPPriority Unsigned32, pimBsrCandidateRPAdvInterval Unsigned32, pimBsrCandidateRPHoldtime Unsigned32, pimBsrCandidateRPStatus RowStatus, pimBsrCandidateRPStorageType StorageType } Joshi & Bijlani Standards Track [Page 4]
RFC 5240 PIM BSR MIB June 2008 pimBsrCandidateRPAddressType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION "The Inet address type of the Candidate-RP." ::= { pimBsrCandidateRPEntry 1 } pimBsrCandidateRPAddress OBJECT-TYPE SYNTAX InetAddress (SIZE (4|8|16|20)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (unicast) address that will be advertised as a Candidate-RP. The InetAddressType is given by the pimBsrCandidateRPAddressType object." ::= { pimBsrCandidateRPEntry 2 } pimBsrCandidateRPGroupAddress OBJECT-TYPE SYNTAX InetAddress (SIZE (4|8|16|20)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The IP multicast group address that, when combined with the corresponding value of pimBsrCandidateRPGroupPrefixLength, identifies a group prefix for which the local router will advertise itself as a Candidate-RP. The InetAddressType is given by the pimBsrCandidateRPAddressType object. This address object is only significant up to pimBsrCandidateRPGroupPrefixLength bits. The remainder of the address bits are zero. This is especially important for this field, which is part of the index of this entry. Any non-zero bits would signify an entirely different entry." ::= { pimBsrCandidateRPEntry 3 } pimBsrCandidateRPGroupPrefixLength OBJECT-TYPE SYNTAX InetAddressPrefixLength (4..128) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The multicast group address mask that, when combined with the corresponding value of pimBsrCandidateRPGroupAddress, identifies a group prefix for which the local router will advertise itself as a Candidate-RP. The InetAddressType is given by the Joshi & Bijlani Standards Track [Page 5]
RFC 5240 PIM BSR MIB June 2008 pimBsrCandidateRPAddressType object." ::= { pimBsrCandidateRPEntry 4 } pimBsrCandidateRPBidir OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-create STATUS current DESCRIPTION "If this object is set to TRUE, this group range is advertised with this RP as a BIDIR-PIM group range. If it is set to FALSE, it is advertised as a PIM-SM group range." DEFVAL { false } ::= { pimBsrCandidateRPEntry 5 } pimBsrCandidateRPAdvTimer OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The time remaining before the local router next sends a Candidate-RP-Advertisement to the elected BSR for this zone." ::= { pimBsrCandidateRPEntry 6 } pimBsrCandidateRPPriority OBJECT-TYPE SYNTAX Unsigned32 (0..255) MAX-ACCESS read-create STATUS current DESCRIPTION "The priority for this Candidate-RP advertised in Candidate-RP-Advertisements." REFERENCE "RFC 5059, section 3.2" DEFVAL { 192 } ::= { pimBsrCandidateRPEntry 7 } pimBsrCandidateRPAdvInterval OBJECT-TYPE SYNTAX Unsigned32 (1..26214) UNITS "seconds" MAX-ACCESS read-create STATUS current DESCRIPTION "A Candidate-RP generates Candidate-RP-Advertisements periodically. This object represents the time interval in seconds between two consecutive advertisements." REFERENCE "RFC 5059, sections 3.2 and 5" DEFVAL { 60 } Joshi & Bijlani Standards Track [Page 6]
RFC 5240 PIM BSR MIB June 2008 ::= { pimBsrCandidateRPEntry 8 } pimBsrCandidateRPHoldtime OBJECT-TYPE SYNTAX Unsigned32 (0..65535) UNITS "seconds" MAX-ACCESS read-create STATUS current DESCRIPTION "Holdtime for this Candidate-RP. The amount of time (in seconds) this Candidate-RP entry is valid. This object's value can be zero only when this C-RP is shutting down." REFERENCE "RFC 5059, section 4.2" DEFVAL { 150 } ::= { pimBsrCandidateRPEntry 9 } pimBsrCandidateRPStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this row, by which new entries may be created, or old entries deleted from this table. This status object can be set to active(1) without setting any other columnar objects in this entry. All writable objects in this entry can be modified when the status of this entry is active(1)." ::= { pimBsrCandidateRPEntry 10 } pimBsrCandidateRPStorageType OBJECT-TYPE SYNTAX StorageType MAX-ACCESS read-create STATUS current DESCRIPTION "The storage type for this row. Rows having the value 'permanent' need not allow write-access to any columnar objects in the row." DEFVAL { nonVolatile } ::= { pimBsrCandidateRPEntry 11 } -- Joshi & Bijlani Standards Track [Page 7]
RFC 5240 PIM BSR MIB June 2008 -- The BSR Elected BSR RP-Set Table -- pimBsrElectedBSRRPSetTable OBJECT-TYPE SYNTAX SEQUENCE OF PimBsrElectedBSRRPSetEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The (conceptual) table listing BSR-specific information about PIM group mappings learned via C-RP advertisements or created locally using configurations. This table is maintained only on the Elected BSR. An Elected BSR uses this table to create Bootstrap messages after applying a local policy to include some or all of the group mappings in this table." ::= { pimBsrObjects 2 } pimBsrElectedBSRRPSetEntry OBJECT-TYPE SYNTAX PimBsrElectedBSRRPSetEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the pimBsrElectedBSRRPSetTable." INDEX { pimBsrElectedBSRGrpMappingAddrType, pimBsrElectedBSRGrpMappingGrpAddr, pimBsrElectedBSRGrpMappingGrpPrefixLen, pimBsrElectedBSRGrpMappingRPAddr } ::= { pimBsrElectedBSRRPSetTable 1 } PimBsrElectedBSRRPSetEntry ::= SEQUENCE { pimBsrElectedBSRGrpMappingAddrType InetAddressType, pimBsrElectedBSRGrpMappingGrpAddr InetAddress, pimBsrElectedBSRGrpMappingGrpPrefixLen InetAddressPrefixLength, pimBsrElectedBSRGrpMappingRPAddr InetAddress, pimBsrElectedBSRRPSetPriority Unsigned32, pimBsrElectedBSRRPSetHoldtime Unsigned32, pimBsrElectedBSRRPSetExpiryTime TimeTicks, pimBsrElectedBSRRPSetGrpBidir TruthValue } pimBsrElectedBSRGrpMappingAddrType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION Joshi & Bijlani Standards Track [Page 8]
RFC 5240 PIM BSR MIB June 2008 "The Inet address type of the IP multicast group prefix." ::= { pimBsrElectedBSRRPSetEntry 2 } pimBsrElectedBSRGrpMappingGrpAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (4|8|16|20)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The IP multicast group address that, when combined with pimBsrElectedBSRGrpMappingGrpPrefixLen, gives the group prefix for this mapping. The InetAddressType is given by the pimBsrElectedBSRGrpMappingAddrType object. This address object is only significant up to pimBsrElectedBSRGrpMappingGrpPrefixLen bits. The remainder of the address bits are zero. This is especially important for this field, which is part of the index of this entry. Any non-zero bits would signify an entirely different entry." ::= { pimBsrElectedBSRRPSetEntry 3 } pimBsrElectedBSRGrpMappingGrpPrefixLen OBJECT-TYPE SYNTAX InetAddressPrefixLength (4..128) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The multicast group prefix length that, when combined with pimBsrElectedBSRGrpMappingGrpAddr, gives the group prefix for this mapping. The InetAddressType is given by the pimBsrElectedBSRGrpMappingAddrType object. If pimBsrElectedBSRGrpMappingAddrType is 'ipv4' or 'ipv4z', this object must be in the range 4..32. If pimBsrElectedBSRGrpMappingAddrType is 'ipv6' or 'ipv6z', this object must be in the range 8..128." ::= { pimBsrElectedBSRRPSetEntry 4 } pimBsrElectedBSRGrpMappingRPAddr OBJECT-TYPE SYNTAX InetAddress (SIZE (4|8|16|20)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The IP address of the RP to be used for groups within this group prefix. The InetAddressType is given by the pimBsrElectedBSRGrpMappingAddrType object." ::= { pimBsrElectedBSRRPSetEntry 5 } pimBsrElectedBSRRPSetPriority OBJECT-TYPE Joshi & Bijlani Standards Track [Page 9]
RFC 5240 PIM BSR MIB June 2008 SYNTAX Unsigned32 (0..255) MAX-ACCESS read-only STATUS current DESCRIPTION "The priority for RP. Numerically higher values for this object indicate lower priorities, with the value zero denoting the highest priority." REFERENCE "RFC 5059, section 4.1" ::= { pimBsrElectedBSRRPSetEntry 6 } pimBsrElectedBSRRPSetHoldtime OBJECT-TYPE SYNTAX Unsigned32 (0..65535) UNITS "seconds" MAX-ACCESS read-only STATUS current DESCRIPTION "The holdtime for RP" REFERENCE "RFC 5059, section 4.1" ::= { pimBsrElectedBSRRPSetEntry 7 } pimBsrElectedBSRRPSetExpiryTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The minimum time remaining before this entry will be aged out. The value zero indicates that this entry will never be aged out." ::= { pimBsrElectedBSRRPSetEntry 8 } pimBsrElectedBSRRPSetGrpBidir OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "If this object is TRUE, this group range with this RP is a BIDIR-PIM group range. If it is set to FALSE, it is a PIM-SM group range." ::= { pimBsrElectedBSRRPSetEntry 9 } -- -- The BSR Candidate-BSR Table -- pimBsrCandidateBSRTable OBJECT-TYPE SYNTAX SEQUENCE OF PimBsrCandidateBSREntry MAX-ACCESS not-accessible STATUS current Joshi & Bijlani Standards Track [Page 10]
RFC 5240 PIM BSR MIB June 2008 DESCRIPTION "The (conceptual) table containing Candidate-BSR configuration for the local router. The table contains one row for each zone for which the local router is to advertise itself as a Candidate-BSR." ::= { pimBsrObjects 3 } pimBsrCandidateBSREntry OBJECT-TYPE SYNTAX PimBsrCandidateBSREntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the pimBsrCandidateBSRTable." INDEX { pimBsrCandidateBSRZoneIndex } ::= { pimBsrCandidateBSRTable 1 } PimBsrCandidateBSREntry ::= SEQUENCE { pimBsrCandidateBSRZoneIndex InetZoneIndex, pimBsrCandidateBSRAddressType InetAddressType, pimBsrCandidateBSRAddress InetAddress, pimBsrCandidateBSRPriority Unsigned32, pimBsrCandidateBSRHashMaskLength Unsigned32, pimBsrCandidateBSRElectedBSR TruthValue, pimBsrCandidateBSRBootstrapTimer TimeTicks, pimBsrCandidateBSRStatus RowStatus, pimBsrCandidateBSRStorageType StorageType } pimBsrCandidateBSRZoneIndex OBJECT-TYPE SYNTAX InetZoneIndex (1..4294967295) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The zone index uniquely identifies the zone on a device to which this Candidate-BSR is attached. There is one entry for each zone in ipMcastZoneTable. Scope-level information for this zone can be extracted from ipMcastZoneTable in IP Multicast MIB [RFC5132]. Zero is a special value used to request the default zone for a given scope. Zero is not a valid value for this object." ::= { pimBsrCandidateBSREntry 1 } pimBsrCandidateBSRAddressType OBJECT-TYPE SYNTAX InetAddressType Joshi & Bijlani Standards Track [Page 11]
RFC 5240 PIM BSR MIB June 2008 MAX-ACCESS read-create STATUS current DESCRIPTION "The address type of the Candidate-BSR." ::= { pimBsrCandidateBSREntry 2 } pimBsrCandidateBSRAddress OBJECT-TYPE SYNTAX InetAddress MAX-ACCESS read-create STATUS current DESCRIPTION "The (unicast) address that the local router will use to advertise itself as a Candidate-BSR. The InetAddressType is given by the pimBsrCandidateBSRAddressType object." ::= { pimBsrCandidateBSREntry 3 } pimBsrCandidateBSRPriority OBJECT-TYPE SYNTAX Unsigned32 (0..255) MAX-ACCESS read-create STATUS current DESCRIPTION "The priority value for the local router as a Candidate-BSR for this zone. Numerically higher values for this object indicate higher priorities." DEFVAL { 0 } ::= { pimBsrCandidateBSREntry 4 } pimBsrCandidateBSRHashMaskLength OBJECT-TYPE SYNTAX Unsigned32 (0..128) MAX-ACCESS read-create STATUS current DESCRIPTION "The hash mask length (used in the RP hash function) that the local router will advertise in its Bootstrap messages for this zone. This object defaults to 30 if pimBsrCandidateBSRAddressType is 'ipv4' or 'ipv4z' , and defaults to 126 if pimBsrCandidateBSRAddressType is 'ipv6' or 'ipv6z'." ::= { pimBsrCandidateBSREntry 5 } pimBsrCandidateBSRElectedBSR OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "Whether the local router is the elected BSR for this zone." Joshi & Bijlani Standards Track [Page 12]
RFC 5240 PIM BSR MIB June 2008 ::= { pimBsrCandidateBSREntry 6 } pimBsrCandidateBSRBootstrapTimer OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The time remaining before the local router next originates a Bootstrap message for this zone. Value of this object is zero if pimBsrCandidateBSRElectedBSR is 'FALSE'." ::= { pimBsrCandidateBSREntry 7 } pimBsrCandidateBSRStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this row, by which new entries may be created or old entries deleted from this table. This status object can be set to active(1) without setting any other columnar objects in this entry. All writable objects in this entry can be modified when the status of this entry is active(1)." ::= { pimBsrCandidateBSREntry 8 } pimBsrCandidateBSRStorageType OBJECT-TYPE SYNTAX StorageType MAX-ACCESS read-create STATUS current DESCRIPTION "The storage type for this row. Rows having the value 'permanent' need not allow write-access to any columnar objects in the row." DEFVAL { nonVolatile } ::= { pimBsrCandidateBSREntry 9 } -- -- The BSR Elected-BSR Table -- pimBsrElectedBSRTable OBJECT-TYPE SYNTAX SEQUENCE OF PimBsrElectedBSREntry MAX-ACCESS not-accessible STATUS current DESCRIPTION Joshi & Bijlani Standards Track [Page 13]
RFC 5240 PIM BSR MIB June 2008 "The (conceptual) table containing information about elected BSRs. The table contains one row for each zone for which there is an elected BSR." ::= { pimBsrObjects 4 } pimBsrElectedBSREntry OBJECT-TYPE SYNTAX PimBsrElectedBSREntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry (conceptual row) in the pimBsrElectedBSRTable." INDEX { pimBsrElectedBSRZoneIndex } ::= { pimBsrElectedBSRTable 1 } PimBsrElectedBSREntry ::= SEQUENCE { pimBsrElectedBSRZoneIndex InetZoneIndex, pimBsrElectedBSRAddressType InetAddressType, pimBsrElectedBSRAddress InetAddress, pimBsrElectedBSRPriority Unsigned32, pimBsrElectedBSRHashMaskLength Unsigned32, pimBsrElectedBSRExpiryTime TimeTicks } pimBsrElectedBSRZoneIndex OBJECT-TYPE SYNTAX InetZoneIndex (1..4294967295) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The zone index uniquely identifies the zone on a device to which this Elected BSR is attached. There is one entry for each zone in ipMcastZoneTable. Scope-level information for this zone can be extracted from ipMcastZoneTable in IP Multicast MIB [RFC5132]. Zero is a special value used to request the default zone for a given scope. Zero is not a valid value for this object." ::= { pimBsrElectedBSREntry 1 } pimBsrElectedBSRAddressType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS read-only STATUS current DESCRIPTION "The address type of the elected BSR." ::= { pimBsrElectedBSREntry 2 } Joshi & Bijlani Standards Track [Page 14]
RFC 5240 PIM BSR MIB June 2008 pimBsrElectedBSRAddress OBJECT-TYPE SYNTAX InetAddress (SIZE (4|8|16|20)) MAX-ACCESS read-only STATUS current DESCRIPTION "The (unicast) address of the elected BSR. The InetAddressType is given by the pimBsrElectedBSRAddressType object." ::= { pimBsrElectedBSREntry 3 } pimBsrElectedBSRPriority OBJECT-TYPE SYNTAX Unsigned32 (0..255) MAX-ACCESS read-only STATUS current DESCRIPTION "The priority value for the elected BSR for this address type. Numerically higher values for this object indicate higher priorities." ::= { pimBsrElectedBSREntry 4 } pimBsrElectedBSRHashMaskLength OBJECT-TYPE SYNTAX Unsigned32 (0..128) MAX-ACCESS read-only STATUS current DESCRIPTION "The hash mask length (used in the RP hash function) advertised by the elected BSR for this zone." ::= { pimBsrElectedBSREntry 5 } pimBsrElectedBSRExpiryTime OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The minimum time remaining before the elected BSR for this zone will be declared down." ::= { pimBsrElectedBSREntry 6 } -- -- PIM BSR Notifications -- pimBsrElectedBSRLostElection NOTIFICATION-TYPE OBJECTS { pimBsrElectedBSRAddressType, pimBsrElectedBSRAddress, pimBsrElectedBSRPriority } STATUS current DESCRIPTION Joshi & Bijlani Standards Track [Page 15]
RFC 5240 PIM BSR MIB June 2008 "A pimBsrElectedBSRLostElection notification should be generated when current E-BSR lost election to a new Candidate-BSR. Only an E-BSR should generate this notification. This notification is generated when pimBsrCandidateBSRElectedBSR becomes FALSE." REFERENCE "RFC 5059, section 3.1" ::= { pimBsrNotifications 1 } pimBsrCandidateBSRWinElection NOTIFICATION-TYPE OBJECTS { pimBsrCandidateBSRElectedBSR } STATUS current DESCRIPTION "A pimBsrCandidateBSRWinElection notification should be generated when a C-BSR wins BSR Election. Only an E-BSR should generate this notification. This notification is generated when pimBsrCandidateBSRElectedBSR becomes TRUE." REFERENCE "RFC 5059, section 3.1" ::= { pimBsrNotifications 2 } -- -- Compliance Statements -- pimBsrCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for PIM routers that implement the Bootstrap Router (BSR) mechanism." MODULE -- this module MANDATORY-GROUPS { pimBsrObjectGroup } GROUP pimBsrDiagnosticsGroup DESCRIPTION "This group is optional." ::= { pimBsrCompliances 1 } -- -- Units of Conformance -- pimBsrObjectGroup OBJECT-GROUP Joshi & Bijlani Standards Track [Page 16]
RFC 5240 PIM BSR MIB June 2008 OBJECTS { pimBsrCandidateRPBidir, pimBsrCandidateRPAdvTimer, pimBsrCandidateRPPriority, pimBsrCandidateRPAdvInterval, pimBsrCandidateRPHoldtime, pimBsrCandidateRPStatus, pimBsrCandidateRPStorageType, pimBsrElectedBSRRPSetPriority, pimBsrElectedBSRRPSetHoldtime, pimBsrElectedBSRRPSetExpiryTime, pimBsrElectedBSRRPSetGrpBidir, pimBsrCandidateBSRAddress, pimBsrCandidateBSRAddressType, pimBsrCandidateBSRPriority, pimBsrCandidateBSRHashMaskLength, pimBsrCandidateBSRElectedBSR, pimBsrCandidateBSRBootstrapTimer, pimBsrCandidateBSRStatus, pimBsrCandidateBSRStorageType, pimBsrElectedBSRAddress, pimBsrElectedBSRAddressType, pimBsrElectedBSRPriority, pimBsrElectedBSRHashMaskLength, pimBsrElectedBSRExpiryTime } STATUS current DESCRIPTION "A collection of objects for managing the Bootstrap Router (BSR) mechanism for PIM routers." ::= { pimBsrGroups 1 } pimBsrDiagnosticsGroup NOTIFICATION-GROUP NOTIFICATIONS { pimBsrElectedBSRLostElection, pimBsrCandidateBSRWinElection } STATUS current DESCRIPTION "Objects providing additional diagnostics related to the Bootstrap Router (BSR) mechanism for PIM routers." ::= { pimBsrGroups 2 } 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 Joshi & Bijlani Standards Track [Page 17]
RFC 5240 PIM BSR MIB June 2008 environment without proper protection can have a negative effect on network operations. These are the tables and objects and their sensitivity/vulnerability: o A new Candidate-BSR with high priority or modification of priority ( bsrCandidateBSRPriority ) of an existing Candidate-BSR can take over the functionality of an Elected BSR, which can prevent and disrupt the services. o A new Candidate-RP with lower priority or modification of priority ( bsrCandidateRPPriority ) of an existing Candidate-RP can force other routers to select itself for a particular group prefix. This can prevent and disrupt the services provided through this group prefix. The following are the read-write and read-create objects defined in this MIB module: bsrCandidateRPBidir bsrCandidateRPPriority bsrCandidateRPAdvInterval bsrCandidateRPHoldtime bsrCandidateBSRAddressType bsrCandidateBSRAddress bsrCandidateBSRPriority bsrCandidateBSRHashMaskLength Some of the readable objects in this MIB module (i.e., objects with a MAX-ACCESS other than not-accessible) may be considered sensitive or vulnerable in some network environments. It is thus important to control even GET and/or NOTIFY access to these objects and possibly to even encrypt the values of these objects when sending them over the network via SNMP. These are the tables and objects and their sensitivity/vulnerability: pimBsrCandidateRPAdvTimer pimBsrElectedBSRRPSetPriority pimBsrElectedBSRRPSetHoldtime pimBsrElectedBSRRPSetExpiryTime pimBsrElectedBSRRPSetGrpBidir pimBsrCandidateBSRElectedBSR pimBsrCandidateBSRBootstrapTimer pimBsrElectedBSRAddressType pimBsrElectedBSRAddress pimBsrElectedBSRPriority pimBsrElectedBSRHashMaskLength pimBsrElectedBSRExpiryTime Joshi & Bijlani Standards Track [Page 18]
RFC 5240 PIM BSR MIB June 2008 In this MIB module, possible effects that can be induced by GET operations include: o Determination of Elected BSR, Candidate-BSRs, and Candidate-RPs in the Multicast Network topology. This information may be sensitive and may be used in preparation for Denial-of-Service (DoS) attacks including any of the attacks described above. SNMP versions prior to SNMPv3 did not include adequate security. Even if the network itself is secure (for example by using IPsec), there is still no control over whom on the secure network is allowed to access (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 access (read/change/create/delete) them. 7. IANA Considerations The MIB module in this document uses the following IANA-assigned OBJECT IDENTIFIER values recorded in the SMI Numbers registry: Descriptor OBJECT IDENTIFIER value ---------- ----------------------- pimBsrMIB { mib-2 172 } 8. Acknowledgments This MIB module is based on the original work in [RFC5060] by R. Sivaramu, J. Lingard, and B. Joshi. Many thanks to Bill Fenner, Stig Venaas, Nidhi Bhaskar, David Mcwalter, David Harrington, and J. W. Atwood for their feedback on this MIB module. Suggested IPv6 multicast MIBs by R. Sivaramu and R. Raghunarayan have been used for comparison while editing this MIB module. Joshi & Bijlani Standards Track [Page 19]
RFC 5240 PIM BSR MIB June 2008 9. References Joshi & Bijlani Standards Track [Page 20]
RFC 5240 PIM BSR MIB June 2008 9.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 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. [RFC4001] Daniele, M., Haberman, B., Routhier, S., and J. Schoenwaelder, "Textual Conventions for Internet Network Addresses", RFC 4001, February 2005. [RFC4601] Fenner, B., Handley, M., Holbrook, H., and I. Kouvelas, "Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised)", RFC 4601, August 2006. [RFC5060] Sivaramu, R., Lingard, J., McWalter, D., Joshi, B., and A. Kessler, "Protocol Independent Multicast MIB", RFC 5060, January 2008. [RFC5059] Bhaskar, N., Gall, A., Lingard, J., and S. Venaas, "Bootstrap Router (BSR) Mechanism for Protocol Independent Multicast (PIM)", RFC 5059, January 2008. [RFC5132] McWalter, D., Thaler, D., and A. Kessler, "IP Multicast MIB", RFC 5132, December 2007. 9.2. Informative References [RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction and Applicability Statements for Internet- Standard Management Framework", RFC 3410, December 2002. Joshi & Bijlani Standards Track [Page 21]
RFC 5240 PIM BSR MIB June 2008 Authors' Addresses Bharat Joshi Infosys Technologies Ltd. 44 Electronics City, Hosur Road Bangalore 560 100 India EMail: bharat_joshi@infosys.com URI: http://www.infosys.com/ Raina Bijlani EMail: rainab@gmail.com Joshi & Bijlani Standards Track [Page 22]
RFC 5240 PIM BSR MIB June 2008 Full Copyright Statement Copyright (C) The IETF Trust (2008). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM 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. Intellectual Property The IETF takes no position regarding the validity or scope of any Intellectual Property Rights 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; nor does it represent that it has made any independent effort to identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. Copies of IPR disclosures made to the IETF Secretariat 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 on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at ietf-ipr@ietf.org. Joshi & Bijlani Standards Track [Page 23]
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