Network Working Group E. Stephan Internet-Draft France Telecom Intended status: Standards Track October 24, 2008 Expires: April 27, 2009 Definitions of Managed Objects for Path Computation Element Discovery draft-ietf-pce-disc-mib-03 Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on April 27, 2009. 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 Path Computation Elements Discovery. Requirements Language 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]. Stephan Expires April 27, 2009 [Page 1]
Internet-Draft PCE-DISC-STD-MIB October 2008 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. The Internet-Standard Management Framework . . . . . . . . . . 3 3. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 3 4. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3 5. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6. Structure of the MIB Module . . . . . . . . . . . . . . . . . 4 6.1. The Discovery objects . . . . . . . . . . . . . . . . . . 4 6.2. PCEs capabilities objects . . . . . . . . . . . . . . . . 5 6.3. PCEs options capabilities objects . . . . . . . . . . . . 5 6.4. PCEs Activity Objects . . . . . . . . . . . . . . . . . . 5 6.5. The Notification Group . . . . . . . . . . . . . . . . . . 5 7. Relationship to Other MIB Modules . . . . . . . . . . . . . . 5 7.1. Relationship to IGP MIB modules . . . . . . . . . . . . . 6 7.2. MIB modules required for IMPORTS . . . . . . . . . . . . . 6 8. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 6 9. Security Considerations . . . . . . . . . . . . . . . . . . . 22 10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 23 11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 23 11.1. Normative References . . . . . . . . . . . . . . . . . . . 23 11.2. Informative References . . . . . . . . . . . . . . . . . . 24 Appendix A. Open Issues . . . . . . . . . . . . . . . . . . . . . 24 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 24 Intellectual Property and Copyright Statements . . . . . . . . . . 25 Stephan Expires April 27, 2009 [Page 2]
Internet-Draft PCE-DISC-STD-MIB October 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 objects used for managing Path Computation Elements Discovery. For an introduction to the concepts of PCE, see [RFC4655]. 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", "NOT RECOMMENDED", "MAY", and "OPTIONAL", when they appear in this document, are to be interpreted as described in BCP 14, RFC 2119 [RFC2119]. 4. Terminology The terminology used in this document is built on notions introduced and discussed in PCE WG documents. The reader should be familiar with these documents Domain: any collection of network elements within a common sphere of address management or path computational responsibility. IGP Area: OSPF Area or ISIS level. PCC: Stephan Expires April 27, 2009 [Page 3]
Internet-Draft PCE-DISC-STD-MIB October 2008 Path Computation Client: any client application requesting a path computation to be performed by a Path Computation Element. PCE: Path Computation Element: an entity (component, application, or network node) that is capable of computing a network path or route based on a network graph, and applying computational constraints. 5. Overview [RFC4655] describes the architecture for a PCE-based path computation model for MPLS and GMPLS TE LSPs. The architecture allows the separation of PCE from PCC. It requires that a PCC be aware of the location of one or more PCEs. This relies on a communication protocol between PCC and PCE for automatic and dynamic PCE discovery. [RFC4674] defines the PCE discovery mechanism and information elements which are derived as an extension for OSPF in [RFC5089] and as an extension for ISIS in [RFC5089] . The current MIB module defines the objects the section "6.10.2.1. PCC MIB module " of [RFC4674] identifies as to be disclosed on the management interface of the PCC. 6. Structure of the MIB Module This MIB module is arranged into groups. Each group is organized as a set of related objects. The overall structure and assignment of objects to their groups, and the intended purpose of each group, is shown below. 6.1. The Discovery objects Objects of pceDiscoveryObjects provide general information on the PCEs discovered and on their status. This includes: - A control to disable the automatic discovery mechanism; - The number of known PCEs; - The number of discovered PCEs; - The pceDiscoveryTable which details information per PCE: - Addresses, discovery Mechanism type; - Discovery time, last activity time; - Congestion and congestion duration. Stephan Expires April 27, 2009 [Page 4]
Internet-Draft PCE-DISC-STD-MIB October 2008 6.2. PCEs capabilities objects These objects report on computation capabilities per PCE as defined in PCE-PATHSCOPE, PCE-DOMAINS and PCE-NEIG-DOMAINS information elements. Objects of pceDiscPathScopeTable collect the computation capabilities and preferences fo the PCEs discovered. Objects of pceDiscDomainTable list the domains for which the PCE discovered have topology visibility and path computation facilities. Objects of pceDiscNeighborDomainTable define domains toward which a PCE can compute path. 6.3. PCEs options capabilities objects Objects of pceDiscOptionalCapabilitiesTable provides computation options per PCE as defined in The PCE-CAP-FLAGS information elements. 6.4. PCEs Activity Objects The objects of pceDiscActivityTable monitor the activity of the discovery mechanism of each PCE to enable effective analysis of the operation of the protocols. pceDiscActivityTable reports on the activity of the discovery protocol per PCE: o Modification of PCE discovery; o The average and maximum rates of arrival, departure of PCE discovery information; o The number of unacceptable and incomprehensible discovery information exchanges. 6.5. The Notification Group This group defines notifications to inform of important events related to the monitoring of the PCE Discovery sessions such as the ending of all the sessions and abnormal rate of unacceptable messages. 7. Relationship to Other MIB Modules Stephan Expires April 27, 2009 [Page 5]
Internet-Draft PCE-DISC-STD-MIB October 2008 7.1. Relationship to IGP MIB modules PCE Discovery relies on existing protocols which have specialized MIB objects to monitor their own activities. Consequently this document considers that monitoring underlying protocols in out of the scope of the current MIB module. 7.2. MIB modules required for IMPORTS The following MIB module IMPORTS objects from SNMPv2-SMI [RFC2578], SNMPv2-TC [RFC2579], SNMPv2-CONF [RFC2580], and IF-MIB [RFC2863] and also REFERENCEs document RFC0768 [RFC0768] 8. Definitions PCE-DISC-STD-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, Counter32, Unsigned32, Integer32, IpAddress FROM SNMPv2-SMI TimeStamp, TruthValue FROM SNMPv2-TC Ipv6Address FROM IPV6-TC MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP FROM SNMPv2-CONF AddressFamilyNumbers FROM IANA-ADDRESS-FAMILY-NUMBERS-MIB IANAipRouteProtocol FROM IANA-RTPROTO-MIB pceStdMIB, PceRoutingDomainID FROM PCE-TC-STD-MIB; -- [RFCxxxx] -- rfc editor replace xxxx with the rfc number pceDiscDraftMIB MODULE-IDENTITY LAST-UPDATED "200810240000Z" -- October 24, 2008 ORGANIZATION "Path Computation Element (PCE) Working Group" CONTACT-INFO " Stephan Emile France Telecom Email: emile.stephan@orange-ftgroup.com Stephan Expires April 27, 2009 [Page 6]
Internet-Draft PCE-DISC-STD-MIB October 2008 Email comments directly to the PCE WG Mailing List at pce@ietf.org WG-URL: http://www.ietf.org/html.charters/pce-charter.html " DESCRIPTION "This MIB module defines a collection of objects for managing Path Computation Elements (PCEs) Discovery." ::= { pceStdMIB 2 } pceDiscNotifications OBJECT IDENTIFIER ::= { pceDiscDraftMIB 0 } pceDiscMIBObjects OBJECT IDENTIFIER ::= { pceDiscDraftMIB 1 } pceDiscoveryObjects OBJECT IDENTIFIER ::= { pceDiscMIBObjects 1 } pceDiscoveryAdminStatus OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } MAX-ACCESS read-write STATUS current DESCRIPTION "Setting this object to disabled(2) disables the discovery of PCEs. Once disabled, The discovery must be explicitly enabled to restore discovery of PCEs. Setting this object to enabled(1) enables the discovery of PCEs." ::= { pceDiscoveryObjects 1 } pceDiscoveryKnownPCEs OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of PCEs the PCC is potentially in relation with. This includes PCE manually declared and active PCEs" ::= { pceDiscoveryObjects 2 } pceDiscoveryActivePCEs OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of active PCEs. The detection of the activity a a PCE depends on the nature discovery mechanism. PCE discovered using PCED information received: Stephan Expires April 27, 2009 [Page 7]
Internet-Draft PCE-DISC-STD-MIB October 2008 The relation between the PCC and a PCE is active while the PCE discovery protocol maintains a communication between the PCC and this PCE. PCE Manually declared: The relation between the PCC and a PCE is active and the discovery mechanism is implementation specific; " ::= { pceDiscoveryObjects 3 } pceDiscoveryTable OBJECT-TYPE SYNTAX SEQUENCE OF PceDiscoveryEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Information describing the PCEs discovered." ::= { pceDiscoveryObjects 4 } pceDiscoveryEntry OBJECT-TYPE SYNTAX PceDiscoveryEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Information describing general information of each PCE discovered." INDEX { pceDiscoveryIndex } ::= { pceDiscoveryTable 1 } PceDiscoveryEntry ::= SEQUENCE { pceDiscoveryIndex Integer32, pceDiscoveryMechanism IANAipRouteProtocol, pceDiscoveryIPv4Address IpAddress, pceDiscoveryIPv6Address Ipv6Address, pceDiscoveryTime TimeStamp, pceDiscoveryLastUpdated TimeStamp, pceDiscoveryCongestion TruthValue, pceDiscoveryCongestionDuration Unsigned32 } pceDiscoveryIndex OBJECT-TYPE SYNTAX Integer32 (1..2147483647) MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object identifies locally the PCE for which this entry contains information." ::= { pceDiscoveryEntry 1 } pceDiscoveryMechanism OBJECT-TYPE Stephan Expires April 27, 2009 [Page 8]
Internet-Draft PCE-DISC-STD-MIB October 2008 SYNTAX IANAipRouteProtocol MAX-ACCESS read-only STATUS current DESCRIPTION "This object identifies the type of discovery mechanism used to discover the PCE. The discovery mechanisms covered by PCE WG at the time of the specification are : other (1), --not specified local (2), -- local interface isIs (9), -- Dual IS-IS ospf (13), -- Open Shortest Path First bgp (14), -- Border Gateway Protocol It does not preclude the usage of another routing protocol numbered by this IANAipRouteProtocol " ::= { pceDiscoveryEntry 2 } pceDiscoveryIPv4Address OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-only STATUS current DESCRIPTION "This object is the IP address to be used to reach the PCE. It corresponds to the PCED PCE-ADDRESS. . A value of 0.0.0.0 indicates the absence of this address." ::= { pceDiscoveryEntry 3 } pceDiscoveryIPv6Address OBJECT-TYPE SYNTAX Ipv6Address MAX-ACCESS read-only STATUS current DESCRIPTION "This object is the IPv6 address to be used to reach the PCE. It corresponds to the PCED PCE-ADDRESS. A value of ::0 indicates the absence of this address." ::= { pceDiscoveryEntry 4 } pceDiscoveryTime OBJECT-TYPE SYNTAX TimeStamp MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime at the time this entry was created. local entry: the value of sysUpTime at the time the PCC restarted." ::= { pceDiscoveryEntry 5 } Stephan Expires April 27, 2009 [Page 9]
Internet-Draft PCE-DISC-STD-MIB October 2008 pceDiscoveryLastUpdated OBJECT-TYPE SYNTAX TimeStamp MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime at the time this entry was last updated. Static entry: if the entry values keep unchanged since the re- initialization of the PCC then this object contains a zero value." ::= { pceDiscoveryEntry 6 } pceDiscoveryCongestion OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "This object indicates whether a PCE experiences a processing congestion state or not. " ::= { pceDiscoveryEntry 7 } pceDiscoveryCongestionDuration OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-only STATUS current DESCRIPTION "This object specifies, in seconds, the congestion duration. When the value of pceDiscoveryCongestion is 'false' then this objet MUST be to '0'" ::= { pceDiscoveryEntry 8 } pceDiscCapabilityObjects OBJECT IDENTIFIER ::= { pceDiscMIBObjects 2 } -- -- PCE-PATHSCOPE informations elements -- pceDiscPathScopeTable OBJECT-TYPE SYNTAX SEQUENCE OF PceDiscPathScopeEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION Stephan Expires April 27, 2009 [Page 10]
Internet-Draft PCE-DISC-STD-MIB October 2008 "PCEs may be involved in various path computations such that dedicaced to one AS or one area, or specialized in inter AS, inter area or inter layer. This table describe the path computation capacities and preferences of the PCEs discovered." ::= { pceDiscCapabilityObjects 1 } pceDiscPathScopeEntry OBJECT-TYPE SYNTAX PceDiscPathScopeEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object describes the path computation capacities and preferences of the PCE identified with pceDiscoveryIndex." INDEX { pceDiscoveryIndex } ::= { pceDiscPathScopeTable 1 } PceDiscPathScopeEntry ::= SEQUENCE { pceDiscPathScopeIntraArea TruthValue, pceDiscPathScopeInterArea TruthValue, pceDiscPathScopeDefInterArea TruthValue, pceDiscPathScopeInterAS TruthValue, pceDiscPathScopeDefInterAS TruthValue, pceDiscPathScopeInterLayer TruthValue, pceDiscPathScopePrefIntraArea Integer32, pceDiscPathScopePrefInterArea Integer32, pceDiscPathScopePrefInterAS Integer32, pceDiscPathScopePrefIntLayer Integer32 } pceDiscPathScopeIntraArea OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates whether the PCE supports the L option of the PATH- SCOPE sub TLV: The value is 'true' if the PCE can compute intra-area path." ::= { pceDiscPathScopeEntry 1 } pceDiscPathScopeInterArea OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates whether the PCE supports the R option of the PATH- SCOPE sub TLV: Stephan Expires April 27, 2009 [Page 11]
Internet-Draft PCE-DISC-STD-MIB October 2008 The value is 'true' if the PCE can act as PCE for inter-area TE LSPs computation." ::= { pceDiscPathScopeEntry 2 } pceDiscPathScopeDefInterArea OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates whether the PCE supports the Rd option of the PATH- SCOPE sub TLV: The value is 'true' if the PCE can act as a default PCE for inter-area TE LSPs computation." ::= { pceDiscPathScopeEntry 3 } pceDiscPathScopeInterAS OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates whether the PCE supports the S option of the PATH- SCOPE sub TLV: The value is 'true' if the PCE can act as PCE for inter-AS TE LSPs computation." ::= { pceDiscPathScopeEntry 4 } pceDiscPathScopeDefInterAS OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates whether the PCE supports the Sd option of the PATH- SCOPE sub TLV: The value is 'true' if the PCE can act as a default PCE for inter-AS TE LSPs computation." ::= { pceDiscPathScopeEntry 5 } pceDiscPathScopeInterLayer OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates whether the PCE supports the Y option of the PATH- SCOPE sub TLV: The value is 'true' if the PCE can compute or take part into the computation of paths across layers." ::= { pceDiscPathScopeEntry 6} Stephan Expires April 27, 2009 [Page 12]
Internet-Draft PCE-DISC-STD-MIB October 2008 pceDiscPathScopePrefIntraArea OBJECT-TYPE SYNTAX Integer32 (0..7) MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates the level of preference of the option of computation 'L' compared to other computation options: A value of 7 reflects the highest preference. When the value of PceDiscPathScopeIntraArea is 'false' then this objet MUST be to '0'." ::= { pceDiscPathScopeEntry 7} pceDiscPathScopePrefInterArea OBJECT-TYPE SYNTAX Integer32 (0..7) MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates the level of preference of the option of computation 'R' compared to other computation options: A value of 7 reflects the highest preference. When the value of PceDiscPathScopeInterArea is 'false' then this objet MUST be to '0'." ::= { pceDiscPathScopeEntry 8} pceDiscPathScopePrefInterAS OBJECT-TYPE SYNTAX Integer32 (0..7) MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates the level of preference of the option of computation 'S' compared to other computation options: A value of 7 reflects the highest preference. When the value of PceDiscPathScopeInterAS is 'false' then this objet MUST be to '0'." ::= { pceDiscPathScopeEntry 9} pceDiscPathScopePrefIntLayer OBJECT-TYPE SYNTAX Integer32 (0..7) MAX-ACCESS read-only STATUS current DESCRIPTION "Indicates the level of preference of the option of computation 'Y' compared to other computation options: A value of 7 reflects the highest preference. When the value of PceDiscPathScopeInterLayer is 'false' then this objet MUST be to '0'." ::= { pceDiscPathScopeEntry 10} Stephan Expires April 27, 2009 [Page 13]
Internet-Draft PCE-DISC-STD-MIB October 2008 -- -- PCE-DOMAINS information elements -- pceDiscDomainTable OBJECT-TYPE SYNTAX SEQUENCE OF PceDiscDomainEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Information describing the set of domains where the PCE has topology visibility and can compute paths." ::= { pceDiscCapabilityObjects 2 } pceDiscDomainEntry OBJECT-TYPE SYNTAX PceDiscDomainEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This information describes a domain where the PCE identified with pceDiscoveryIndex has topology visibility and can compute paths." INDEX { pceDiscoveryIndex, pceDiscDomainIndex } ::= { pceDiscDomainTable 1 } PceDiscDomainEntry ::= SEQUENCE { pceDiscDomainIndex Integer32, pceDiscDomainIDType AddressFamilyNumbers, pceDiscDomainID PceRoutingDomainID } pceDiscDomainIndex OBJECT-TYPE SYNTAX Integer32 (1..2147483647) MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object identifies locally a domain for which the PCE identified by pceDiscoveryIndex has topology visibility and can compute paths. " ::= { pceDiscDomainEntry 1 } pceDiscDomainIDType OBJECT-TYPE SYNTAX AddressFamilyNumbers MAX-ACCESS read-only STATUS current Stephan Expires April 27, 2009 [Page 14]
Internet-Draft PCE-DISC-STD-MIB October 2008 DESCRIPTION "This object identifies the type of the domainID of a PCE- DOMAIN SUB TLV. Acceptable types are : ipV4(1) and ipV6(2) for an OSPF area ID; nsap(3) for and ISIS area ID; asNumber(18) for an BGP AS number" ::= { pceDiscDomainEntry 2 } pceDiscDomainID OBJECT-TYPE SYNTAX PceRoutingDomainID MAX-ACCESS read-only STATUS current DESCRIPTION "The ID (area,AS) of the routing domain for which this entry contains information." ::= { pceDiscDomainEntry 3 } -- -- NEIG-PCE-DOMAINS information elements -- pceDiscNeighborDomainTable OBJECT-TYPE SYNTAX SEQUENCE OF PceDiscNeighborDomainEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Information describing the set of destination domains toward which a PCE can compute paths." ::= { pceDiscCapabilityObjects 3 } pceDiscNeighborDomainEntry OBJECT-TYPE SYNTAX PceDiscNeighborDomainEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Information describing the destination domains of each PCE." INDEX { pceDiscoveryIndex, pceDiscNeighborDomainIndex } ::= { pceDiscNeighborDomainTable 1 } PceDiscNeighborDomainEntry ::= SEQUENCE { pceDiscNeighborDomainIndex Integer32, pceDiscNeighborDomainIDType AddressFamilyNumbers, pceDiscNeighborDomainID PceRoutingDomainID } Stephan Expires April 27, 2009 [Page 15]
Internet-Draft PCE-DISC-STD-MIB October 2008 pceDiscNeighborDomainIndex OBJECT-TYPE SYNTAX Integer32 (1..2147483647) MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object identifies locally a destination domain toward which a PCE identified by pceDiscoveryIndex can compute path." ::= { pceDiscNeighborDomainEntry 1 } pceDiscNeighborDomainIDType OBJECT-TYPE SYNTAX AddressFamilyNumbers MAX-ACCESS read-only STATUS current DESCRIPTION "This object identifies the type of the routing domain. Acceptable types are : ipV4(1) and ipV6(2) for an OSPF area ID; nsap(3) for and ISIS area ID; asNumber(18) for an BGP AS number" ::= { pceDiscNeighborDomainEntry 2 } pceDiscNeighborDomainID OBJECT-TYPE SYNTAX PceRoutingDomainID MAX-ACCESS read-only STATUS current DESCRIPTION "The ID (area,AS) of the routing domain for which this entry contains information." ::= { pceDiscNeighborDomainEntry 3 } pceDiscOptionalCapabilitiesObjects OBJECT IDENTIFIER ::= { pceDiscMIBObjects 3 } -- PCE-CAP-FLAGS pceDiscOptionalCapabilitiesTable OBJECT-TYPE SYNTAX SEQUENCE OF PceDiscOptionalCapabilitiesEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table describes various capabilities supported by the PCEs discovered, such as path computation options, requests processing options or new options added in the future in IANA registry named 'PCE Capability Flags'." ::= { pceDiscOptionalCapabilitiesObjects 1 } pceDiscOptionalCapabilitiesEntry OBJECT-TYPE Stephan Expires April 27, 2009 [Page 16]
Internet-Draft PCE-DISC-STD-MIB October 2008 SYNTAX PceDiscOptionalCapabilitiesEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This objet describes an atomic capability the PCE identified by pceDiscoveryIndex supports. " INDEX { pceDiscoveryIndex } ::= { pceDiscOptionalCapabilitiesTable 1 } PceDiscOptionalCapabilitiesEntry ::= SEQUENCE { pceDiscOptionalCapability Integer32 } pceDiscOptionalCapability OBJECT-TYPE SYNTAX Integer32 (0..31) MAX-ACCESS read-only STATUS current DESCRIPTION "This objet describes an atomic option the PCE identified by pceDiscoveryIndex supports. The IANA registry 'PCE Capability Flags' handles current capabilities and the definition of new options in the future. At the time being the value is restricted to one of the following: 0 Path computation with GMPLS link constraints; 1 Bidirectional path computation; 2 Diverse path computation; 3 Load-balanced path computation; 4 Synchronized path computation; 5 Support for multiple objective functions; 6 Support for additive path constraints (max hop count, etc.); 7 Support for request prioritization; 8 Support for multiple requests per message. NOTE: This object type is not enumerated because new options, like p2mp capabilities, may be defined in the future. " ::= { pceDiscOptionalCapabilitiesEntry 1 } -- Activity objects pceDiscActivityObjects OBJECT IDENTIFIER ::= { pceDiscMIBObjects 4 } pceDiscActivityTable OBJECT-TYPE SYNTAX SEQUENCE OF PceDiscActivityEntry MAX-ACCESS not-accessible STATUS current Stephan Expires April 27, 2009 [Page 17]
Internet-Draft PCE-DISC-STD-MIB October 2008 DESCRIPTION "Information describing the discovery mechanisms activities." ::= { pceDiscActivityObjects 1 } pceDiscActivityEntry OBJECT-TYPE SYNTAX PceDiscActivityEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object describes the discovery activity of the PCE identified by pceDiscoveryIndex. " INDEX { pceDiscoveryIndex } ::= { pceDiscActivityTable 1 } PceDiscActivityEntry ::= SEQUENCE { pceDiscActivityTlvReceived Integer32, pceDiscActivityErroredTlvReceived Integer32, pceDiscActivityErroredTlvLastMinutePercentage Integer32, pceDiscActivityErroredTlvRisingThreshold Integer32 } pceDiscActivityTlvReceived OBJECT-TYPE SYNTAX Integer32 (1..2147483647) MAX-ACCESS read-only STATUS current DESCRIPTION "This object counts the number of information elements received since the discovery of the PCE." ::= { pceDiscActivityEntry 1 } pceDiscActivityErroredTlvReceived OBJECT-TYPE SYNTAX Integer32 (1..2147483647) MAX-ACCESS read-only STATUS current DESCRIPTION "This object counts the number of Errored information elements received since the discovery of the PCE." ::= { pceDiscActivityEntry 2 } pceDiscActivityErroredTlvLastMinutePercentage OBJECT-TYPE SYNTAX Integer32 (0..100) MAX-ACCESS read-only STATUS current DESCRIPTION "This object reports the percentage of the errored information elements received over a one-minute average." ::= { pceDiscActivityEntry 3 } Stephan Expires April 27, 2009 [Page 18]
Internet-Draft PCE-DISC-STD-MIB October 2008 pceDiscActivityErroredTlvRisingThreshold OBJECT-TYPE SYNTAX Integer32 (0..100) MAX-ACCESS read-write STATUS current DESCRIPTION "This object specifies the percentage of information elements errors limit to be reach before triggering the sending of the notification 'pceDiscAbnormalErroredTlvPercentage'." ::= { pceDiscActivityEntry 4 } -- -- Notification -- -- pceDiscNotAnyPceIdentified NOTIFICATION-TYPE OBJECTS { pceDiscoveryKnownPCEs } STATUS current DESCRIPTION "This notification is sent when the value of 'pceDiscoveryKnownPCEs' decreases to zero. This occurs typically when, after modification of configuration, there is no more PCE manually declared and when there is no more PCE discovery sessions configured." ::= { pceDiscNotifications 1 } pceDiscAllPcesInactive NOTIFICATION-TYPE OBJECTS { pceDiscoveryKnownPCEs, pceDiscoveryActivePCEs } STATUS current DESCRIPTION "This notification is sent when the value of 'pceDiscoveryActivePCEs' decreases to zero. This occurs when all the PCE discovery sessions come inactive." ::= { pceDiscNotifications 2 } pceDiscAbnormalErroredTlvPercentage NOTIFICATION-TYPE OBJECTS { pceDiscActivityErroredTlvLastMinutePercentage, pceDiscActivityErroredTlvRisingThreshold } Stephan Expires April 27, 2009 [Page 19]
Internet-Draft PCE-DISC-STD-MIB October 2008 STATUS current DESCRIPTION "This notification is sent when the value of 'pceDiscActivityErroredTlvLastMinutePercentage' rises over the value of pceDiscActivityErroredTlvRisingThreshold." ::= { pceDiscNotifications 3 } -- -- PCE DISC agents conformance statement -- pceDiscConformance OBJECT IDENTIFIER ::= { pceDiscDraftMIB 2 } pceDiscCompliances OBJECT IDENTIFIER ::= { pceDiscConformance 1 } pceDiscGroups OBJECT IDENTIFIER ::= { pceDiscConformance 2 } -- PCE DISC agent compliance statements pceDiscGeneralPceInformation MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for SNMP entities that implement only general monitoring information as proposed in the 2nd S. of the section 6.1 of [RFC4674]." MODULE MANDATORY-GROUPS { pceDiscDiscoveryGroup, pceDiscActivityGroup, pceDiscPathScopeGroup, pceDiscDomainsGroup, pceDiscOptionsGroup, pceDiscNotificationGroup } ::= { pceDiscCompliances 1 } pceDiscDiscoveryGroup OBJECT-GROUP OBJECTS { pceDiscoveryAdminStatus, pceDiscoveryKnownPCEs, pceDiscoveryActivePCEs, pceDiscoveryMechanism, pceDiscoveryIPv4Address, pceDiscoveryIPv6Address, Stephan Expires April 27, 2009 [Page 20]
Internet-Draft PCE-DISC-STD-MIB October 2008 pceDiscoveryTime, pceDiscoveryLastUpdated, pceDiscoveryCongestion, pceDiscoveryCongestionDuration } STATUS current DESCRIPTION "Hight level objects for monitoring the PCEs sessions. " ::= { pceDiscGroups 1 } pceDiscActivityGroup OBJECT-GROUP OBJECTS { pceDiscActivityTlvReceived, pceDiscActivityErroredTlvReceived, pceDiscActivityErroredTlvLastMinutePercentage, pceDiscActivityErroredTlvRisingThreshold } STATUS current DESCRIPTION "Objects for monitoring PCEs sessions activity. " ::= { pceDiscGroups 2 } pceDiscPathScopeGroup OBJECT-GROUP OBJECTS { pceDiscPathScopeIntraArea, pceDiscPathScopeInterArea, pceDiscPathScopeDefInterArea, pceDiscPathScopeInterAS, pceDiscPathScopeDefInterAS, pceDiscPathScopeInterLayer, pceDiscPathScopePrefIntraArea, pceDiscPathScopePrefInterArea, pceDiscPathScopePrefInterAS, pceDiscPathScopePrefIntLayer } STATUS current DESCRIPTION "Objects describing the path computation capabilities. " ::= { pceDiscGroups 3 } pceDiscDomainsGroup OBJECT-GROUP OBJECTS { pceDiscDomainIDType, pceDiscDomainID, pceDiscNeighborDomainIDType, pceDiscNeighborDomainID } Stephan Expires April 27, 2009 [Page 21]
Internet-Draft PCE-DISC-STD-MIB October 2008 STATUS current DESCRIPTION "Objects describing the domains the PCEs compute paths on and are in relation with. " ::= { pceDiscGroups 4 } pceDiscOptionsGroup OBJECT-GROUP OBJECTS { pceDiscOptionalCapability } STATUS current DESCRIPTION "Objects describing PCEs options capabilities. " ::= { pceDiscGroups 5 } pceDiscNotificationGroup NOTIFICATION-GROUP NOTIFICATIONS { pceDiscNotAnyPceIdentified, pceDiscAllPcesInactive, pceDiscAbnormalErroredTlvPercentage } STATUS current DESCRIPTION "Set of notifications implemented in this module. " ::= { pceDiscGroups 6 } END 9. 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 on/off of discovery : Unauthorized changes to pceDiscoveryAdminStatus could result in a temporary interruption of the discovery ; 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 Stephan Expires April 27, 2009 [Page 22]
Internet-Draft PCE-DISC-STD-MIB October 2008 sensitivity/vulnerability: o IP addresses of PCE. 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. 10. IANA Considerations . 11. References 11.1. 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. [RFC5089] Le Roux, JL., Vasseur, JP., Ikejiri, Y., and R. Zhang, Stephan Expires April 27, 2009 [Page 23]
Internet-Draft PCE-DISC-STD-MIB October 2008 "IS-IS Protocol Extensions for Path Computation Element (PCE) Discovery", RFC 5089, January 2008. 11.2. Informative References [RFC0768] Postel, J., "User Datagram Protocol", STD 6, RFC 768, August 1980. [RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB", RFC 2863, June 2000. [RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction and Applicability Statements for Internet- Standard Management Framework", RFC 3410, December 2002. [RFC4655] Farrel, A., Vasseur, J., and J. Ash, "A Path Computation Element (PCE)-Based Architecture", RFC 4655, August 2006. [RFC4674] Le Roux, J., "Requirements for Path Computation Element (PCE) Discovery", RFC 4674, October 2006. Appendix A. Open Issues This list of open issues should be cleared and removed before this document hits the IESG. Author's Address Stephan Emile France Telecom 2 avenue Pierre Marzin Lannion, F-22307 Fax: +33 2 96 05 18 52 Email: emile.stephan@orange-ftgroup.com Stephan Expires April 27, 2009 [Page 24]
Internet-Draft PCE-DISC-STD-MIB October 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. Stephan Expires April 27, 2009 [Page 25]
