Internet Draft David Zelig Expires: April 2004 Corrigent Systems Thomas D. Nadeau Cisco Systems, Inc. October 2003 Ethernet Pseudo Wire (PW) Management Information Base draft-ietf-pwe3-enet-mib-02.txt Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. 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. Copyright (C) The Internet Society (2001). All rights reserved. 1 Abstract This memo defines an experimental portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes managed objects for modeling of Ethernet Pseudo Wire (PW) services. Table of Contents 1 Abstract 1 2 Introduction 2 3 Terminology 3 4 The SNMP Management Framework 3 4.1 Object Definitions 4 5 Feature Checklist 4 6 PW-MIB usage 4 6.1 PW-ENET-MIB usage 5 6.2 PW-ENET management model 6 6.3 Example of MIB usage 7 7 Object definitions 7 8 Security Considerations 17 9 References 18 10 Author's Addresses 20 11 Full Copyright Statement 20 2 Introduction This document describes a model for managing Ethernet pseudo wire services for transmission over a packet Switched Network (PSN). This MIB module is generic and common to all types of PSNs supported in the PWE3 architecture [FRARCH], which describes the transport and encapsulation of L1 and L2 services over supported PSN types. In particular, the MIB module associates a port or specific VLANs on top of a physical Ethernet port or a virtual Ethernet interface (for VPLS service) to a point-to-point PW. It is complementary to the [PWMIB], which is used to manage the generic PW parameters common to all service, including all supported PSN types. Conventions used in this document 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 [BCP14]. 3 Terminology This document uses terminology from the document describing the PW architecture [FRARCH] and from [PW-ENET]. 4 The SNMP 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]. 5 Feature Checklist The PW Ethernet MIB module (PW-ENET-MIB) is designed to satisfy the following requirements and constraints: - The MIB module is designed to be work with the PW-MIB [PW-MIB]. - The MIB module is independent of the PSN type. - The MIB module supports various options for selecting Ethernet packets into the PW. These include port-based PW, VLAN-based PW, VLAN-change and adding or removing VLAN fields between the port to be emulated and the PW. - In the case of an MPLS PSN, the MIB module supports the use of multiple PWs to carry the same Ethernet service. These PWs can be used to support L-LSPs or single COS E-LSPs capable PSN, when mapping of the Ethernet PRI bits to the PSN COS is required. - The MIB module enables both point-to-point Ethernet services and VPLS services such as VPLS [VPLS]. - The MIB module allow modeling of the PW as an Ethernet virtual port to be managed via existing Ethernet MIBs like Etherlike-MIB [ENETLIKE]. 6 PW-MIB usage The MIB structure for defining a PW service is composed of three layers of MIB modules functioning together. This general model is defined in the PWE3 Framework [FRMWK]. The layering model is intended to sufficiently isolate PW services from the underlying PSN layer that carries the emulated service. This is done at the same time as providing a standard means for connecting any supported services to any supported PSNs. The first layer known as the service layer contains service-specific modules such as the one defined in this document. These modules define service-specific management objects that interface or collaborate with existing MIB modules for the native version of the service. The service-specific module "glues" the standard modules to the PWE MIB modules. The next layer of the PWE MIB framework is comprised of the PW-MIB module [PWMIB]. This module is used to configure general parameters of PWs that are common to all types of emulated services and PSNs. This layer is connected to the service-specific layer above, and the PSN layer below. The PSN layer provides PSN-specific modules for each type of PSN. These modules associate the PW with one or more "tunnels" that carry the service over the PSN. These modules are defined in other documents. This module is used to "glue" the PW service to the underlying PSN-specific MIB modules. In the case of MPLS, for example, the PW-MPLS MIB [PWMPLSMIB] is used to connect the PW service to either the MPLS-LDP [LDPMIB] or MPLS-TE [TEMIB] MIBs. [PWTC] defines some of the object types used in these modules. The Etherlike-MIB [ENETLIKE] does not support virtual Ethernet port, however it is sometimes desired to manage the PW as an Ethernet port via the Etherlike-MIB. This MIB support an option to recognize the PW as an ifIndex, enabling standard use of the Etherlike-MIB to manage the PW. 6.1 PW-ENET-MIB usage - The PW table (pwVcTable) is used for all PW types (ATM, FR, Ethernet, SONET, etc.). This table contains high level generic parameters related to the PW creation. A row is created by the operator for each PW service. - Based on the PSN type defined for the PW, rows are created in PSN specific module (for example [PWMPLSMIB]) and associated to the pwVcTable by a common PW index. - If the PW type is Ethernet, EthernetVLAN or EthernetVPLS a row is created in pwVcEnetTable. - When using a MPLS PSN, it may be required to separate the same Ethernet services to multiple PW in order to support multiple COS on the same service. In this case, multiple PWs, each with the appropriate COS will be created to the same destination, and classification will be based also on the Ethernet PRI bits marking. The MIB allow any combinations of multiple PRI setting to PSN COS mapping (The exact PSN marking (EXP bits, DSCP etc.) is out of scope of this MIB). In these cases, pwVcEnetTable will hold multiple rows with the same Ethernet port and VLAN mapping, each PW will need to be created separately by the signaling process. 6.2 PW-ENET management model The management model for the Ethernet PW is shown in figure 1, and is based on the PW proposed layering [PWARCH]. +--------------------------------------+ | PE Device | +--------------------------------------+ Single | | | PWES | | Single | PW Instance <------>o Forwarder + PW Instance X<=========> | | | +--------------------------------------+ ^ | May be modeled as ifIndex Notation: o A physical CE-bound PE port + A PW IWF instance interface to the forwarder. X A PE PSN-bound port. Figure 1: A simple point-to-point service In the typical point-to-point service, the object pwVcEnetPortIfIndex associate the physical CE-bound PE port ('o') to the PW (it is allowed to have multiple PWs associated to the same physical port). The operations of the forwarder are also managed by this MIB module. In some models it is convenient to model the forwarder virtual interface to a PW IWF instance ('+') as an ifIndex. As discussed in the [PWMIB], this is possible by using the PW ifType in the ifTable and indicating the ifIndex in the main pwVcTable. In case of Ethernet PW a virtual interface of ifType = etherLike will be assigned on top of the PW interface to enable staitistics gathering and statuses and other management configuration tasks via existing tools. This way, the PW instance is managed as virtual Ethernet interface in the PE. The model for using the PW in non-point to point applications, such as VPLS are done with the same principle in mind, but the details are yet FFS. 6.3 Example of MIB usage TBD 7 Object definitions -- -- Ethernet PW MIB -- PW-ENET-MIB DEFINITIONS ::= BEGIN IMPORTS OBJECT-TYPE, MODULE-IDENTITY, experimental, Counter64 FROM SNMPv2-SMI MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF StorageType, RowStatus FROM SNMPv2-TC InterfaceIndexOrZero FROM IF-MIB pwVcIndex FROM PW-MIB PwVcVlanCfg, PwVcCw, PwVcFragSize FROM PW-TC-MIB; pwVcEnetMIB MODULE-IDENTITY LAST-UPDATED "200307291200Z" -- 29 July 2003 12:00:00 GMT ORGANIZATION "IETF PWE3 Working group" CONTACT-INFO "David Zelig Postal: Corrigent Systems 126, Yigal Alon St. Tel-Aviv, ISRAEL Tel: +972-3-6945273 E-mail: davidz@corrigent.com Thomas D. Nadeau Postal: Cisco Systems, Inc. 250 Apollo Drive Chelmsford, MA 01824 Tel: +1-978-497-3051 Email: tnadeau@cisco.com " DESCRIPTION "This MIB describes a model for managing Ethernet point-to-point pseudo wire services over a Packet Switched Network (PSN)." -- Revision history. REVISION "200307291200Z" -- 29 July 2003 12:00:00 GMT DESCRIPTION " Changes from as draft-pwe3-enet-mib-01. 1) Added Control Word status and fragmantation status. " REVISION "200209221200Z" -- 22 September 2002 12:00:00 GMT DESCRIPTION " Submited as draft-pwe3-enet-mib-00. Changes from previous version: 1) Alignment with draft-pwe3-ethernet-encap-00.txt: removing 'rangeVLAN' mode and the associated objects. 2) Relaxing requirement on value of pwVcEnetPortVlan in port mode. " REVISION "200208201200Z" -- 20 August 2002 12:00:00 GMT DESCRIPTION "Changes from previous version: 1) Add pwVcEnetVcIfIndex - Option for VC as ifIndex. 2) Change counters to 64 bits. 3) Add mode for adding/removing VLAN fields between PW and CE bound interface. 4) Referencing draft-martini instead of draft-so. 5) Editorial changes for some description clauses. 6) MPLS PRI mapping table to be independent (not augmented). 7) Adapt descriptions and rules of use to dratf-ietf-pwe3-Ethernet-encap-00. " REVISION "200202031200Z" -- 03 February 2002 12:00:00 GMT DESCRIPTION "initial revision as -00 draft" ::= { experimental 89 } -- TBD: Get number from IANA pwVcEnetObjects OBJECT IDENTIFIER ::= { pwVcEnetMIB 0 } pwVcEnetConformance OBJECT IDENTIFIER ::= { pwVcEnetMIB 1 } -- -- VC Ethernet table -- pwVcEnetTable OBJECT-TYPE SYNTAX SEQUENCE OF PwVcEnetEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table contains the index to the Ethernet tables associated with this ETH VC, the VLAN configuration and VLAN mode." ::= { pwVcEnetObjects 1 } pwVcEnetEntry OBJECT-TYPE SYNTAX PwVcEnetEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table is indexed by the same index that was created for the associated entry in the PW VC Table in the PW-MIB. The PwVcIndex and the pwVcEnetPwVlan are used as indexes to allow multiple VLANs to exist on the same PW. An entry is created in this table by the agent for every entry in the pwVc table with a VcType of 'ethernetVLAN', 'ethernet' or 'ethernetVPLS'. Additional rows may be created by the operator or the agent if multiple entries are required for the same VC. This table provides Ethernet port mapping and VLAN configuration for each Ethernet VC." INDEX { pwVcIndex, pwVcEnetPwVlan } ::= { pwVcEnetTable 1 } PwVcEnetEntry ::= SEQUENCE { pwVcEnetPwVlan PwVcVlanCfg, pwVcEnetVlanMode INTEGER, pwVcEnetPortVlan PwVcVlanCfg, pwVcEnetPortIfIndex InterfaceIndexOrZero, pwVcEnetVcIfIndex InterfaceIndexOrZero, pwVcEnetFragSize PwVcFragSize, pwVcEnetCwStatus PwVcCw, pwVcEnetRowStatus RowStatus, pwVcEnetStorageType StorageType } pwVcEnetPwVlan OBJECT-TYPE SYNTAX PwVcVlanCfg MAX-ACCESS not-accessible STATUS current DESCRIPTION "This Object defines the VLAN on the VC. The value of 4097 is used if the object is not applicable, for example when mapping all packets from an Ethernet port to this VC. The value of 4096 is used to indicate untagged frames (at least from the PW point of view), for example if pwVcEnetVlanMode is equal 'removeVLAN' or when pwVcEnetVlanMode equal 'noChange' and pwVcEnetPortVlan is equal 4096." ::= { pwVcEnetEntry 1 } pwVcEnetVlanMode OBJECT-TYPE SYNTAX INTEGER { other(0), portBased(1), noChange(2), changeVlan(3), addVlan(4), removeVlan(5) } MAX-ACCESS read-create STATUS current DESCRIPTION "Indicate the mode of VLAN handling between the port associated to the VC and the VC encapsulation itself. - 'other' indicate operation that is not defined by this MIB. - 'portBased' indicates that the forwarder will forward packets between the port and the PW independent of their structure. - 'noChange' indicates that the VC contains the original user VLAN, as specified in pwVcEnetPortVlan. - 'changeVlan' indicates that the VLAN field on the VC may be different than the VLAN field on the user's port. - 'removeVlan' indicates that the encapsulation on the VC does not include the original VLAN field. Note that PRI bits transparency is lost in this case. - 'addVlan' indicate that a VLAN field will be added on the PSN bound direction. pwVcEnetPwVlan indicate the value that will be added. - 'removeVlan', 'addVlan' and 'changeVlan' implementation is not required. " DEFVAL { noChange } ::= { pwVcEnetEntry 2 } pwVcEnetPortVlan OBJECT-TYPE SYNTAX PwVcVlanCfg MAX-ACCESS read-create STATUS current DESCRIPTION "This object define the VLAN value on the physical port (or VPLS virtual port) if a change is required to the VLAN value between the VC and the physical/virtual port. The value of this object can be ignored if the whole traffic from the port is forwarded to one VC independent of the tagging on the port, but it is RECOMENDED that the value in this case will be '4097' indicating not relevant. It MUST be equal to pwVcEnetPwVlan if 'noChange' mode is used. The value 4096 indicate that no VLAN (i.e. untagged frames) on the port are associated to this VC. This allows the same behaviors as assigning 'Default VLAN' to un-tagged frames. " DEFVAL { 4097 } ::= { pwVcEnetEntry 3 } pwVcEnetVcIfIndex OBJECT-TYPE SYNTAX InterfaceIndexOrZero MAX-ACCESS read-create STATUS current DESCRIPTION "It is sometimes convenient to model the VC PW as a virtual interface in the ifTable. In these cases this object hold the value of the ifIndex in the ifTable representing this VC PW. A value of zero indicate no such association or association is not yet known." ::= { pwVcEnetEntry 4 } pwVcEnetPortIfIndex OBJECT-TYPE SYNTAX InterfaceIndexOrZero MAX-ACCESS read-create STATUS current DESCRIPTION "This object is used to specify the ifIndex of the ETHERNET port associated with this VC for point-to-point Ethernet service, or the ifIndex of the virtual interface of the VPLS instance associated with the PW if the service is VPLS. Two rows in this table can point to the same ifIndex only if: 1) It is required to support multiple COS on a MPLS PSN for the same service (i.e.: a combination of ports and VLANs) by the use of multiple VC, each with a different COS. 2) There is no overlap of VLAN values specified in pwVcEnetPortVlan that are associated with this port. A value of zero indicate that association to an ifIndex is not yet known." ::= { pwVcEnetEntry 5 } pwVcEnetFragSize OBJECT-TYPE SYNTAX PwVcFragSize MAX-ACCESS read-only STATUS current DESCRIPTION "This object represent the status of the frgamantation negotiation (or manula configuration) for this PW. Value of zero indicate no fragmantation. If the value is not zero, recieved packets greater than pwVcEnetFragSize should be fragmented to the specified length. " ::= { pwVcEnetEntry 6 } pwVcEnetCwStatus OBJECT-TYPE SYNTAX PwVcCw MAX-ACCESS read-only STATUS current DESCRIPTION "This object represent the status of the control word usage for this PW. " ::= { pwVcEnetEntry 7 } pwVcEnetRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "Enable creating, deleting and modifying this row." ::= { pwVcEnetEntry 8 } pwVcEnetStorageType OBJECT-TYPE SYNTAX StorageType MAX-ACCESS read-create STATUS current DESCRIPTION "Indicates the storage type of this row." ::= { pwVcEnetEntry 9 } -- -- Ethernet Primary Mapping Table -- pwVcEnetMplsPriMappingTable OBJECT-TYPE SYNTAX SEQUENCE OF PwVcEnetMplsPriMappingTableEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table may be used for MPLS PSNs if there is a need to hold multiple VC, each with different COS, for the same user service (port + PW VLAN). Such a need may arise if the MPLS network is capable of L-LSP or E-LSP without multiple COS capabilities. Each row is indexed by the pwVcIndex and indicate the PRI bits on the packet recieved from the user port (or VPLS virtual port) that are classified to this VC. Note that the EXP bit value of the VC is configured in the PW-MPLS-MIB." ::= { pwVcEnetObjects 2 } pwVcEnetMplsPriMappingTableEntry OBJECT-TYPE SYNTAX PwVcEnetMplsPriMappingTableEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Each entry is created if special classification based on the PRI bits is required for this VC." INDEX { pwVcIndex } ::= { pwVcEnetMplsPriMappingTable 1 } PwVcEnetMplsPriMappingTableEntry ::= SEQUENCE { pwVcEnetMplsPriMapping BITS, pwVcEnetMplsPriMappingRowStatus RowStatus, pwVcEnetMplsPriMappingStorageType StorageType } pwVcEnetMplsPriMapping OBJECT-TYPE SYNTAX BITS { pri000 (0), pri001 (1), pri010 (2), pri011 (3), pri100 (4), pri101 (5), pri110 (6), pri111 (7), untagged (8) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object defines the groups of user PRI mapped into this VC. Each bit set indicates that this user priority is assigned to this VC. The value 'untagged' is used to indicate that untagged frames are also associated to this VC. This object allow the use of different PSN COS based on user marking of PRI bits in MPLS PSN with L-LSP or E-LSP without multiple COS support. In all other cases, the default value MUST be used. It is REQUIRED that there is no overlap on this object between rows serving the same service (port+ PW VLAN). In case of missing BIT configuration between rows to the same service, incoming packets with PRI marking not configured should be handled by the VC with the lowest COS. " REFERENCE "See appendix A of for mapping rules of the PRI bits to PSN COS." ::= { pwVcEnetMplsPriMappingTableEntry 1 } pwVcEnetMplsPriMappingRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "Enable creating, deleting and modifying this row." -- TBD: Need to specify exact interaction with other tables, and -- when rows can/cannot be created/deleted/modified. ::= { pwVcEnetMplsPriMappingTableEntry 2 } pwVcEnetMplsPriMappingStorageType OBJECT-TYPE SYNTAX StorageType MAX-ACCESS read-create STATUS current DESCRIPTION "Indicates the storage type of this row." ::= { pwVcEnetMplsPriMappingTableEntry 3 } -- -- VC Ethernet Statistics Table -- pwVcEnetStatsTable OBJECT-TYPE SYNTAX SEQUENCE OF PwVcEnetStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table contains statistical counters specific for Ethernet PW." ::= { pwVcEnetObjects 3 } pwVcEnetStatsEntry OBJECT-TYPE SYNTAX PwVcEnetStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Each entry represents the statistics gathered for the VC carrying the Ethernet packets since this VC was first created in the pwVcEnetTable." INDEX { pwVcIndex } ::= { pwVcEnetStatsTable 1 } PwVcEnetStatsEntry ::= SEQUENCE { pwVcEnetStatsIllegalVlan Counter64, pwVcEnetStatsIllegalLength Counter64 } pwVcEnetStatsIllegalVlan OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-write STATUS current DESCRIPTION "The number of packets received (from the PSN) on this VC with an illegal VLAN field, missing VLAN field that was expected, or A VLAN field when it was not expected. This counter is not relevant if the VC type is 'ethernet' (i.e. raw mode), and should be set to 0 by the agent to indicate this." ::= { pwVcEnetStatsEntry 1 } pwVcEnetStatsIllegalLength OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-write STATUS current DESCRIPTION "The number of packets that were received with an illegal Ethernet packet length on this VC. An illegal length is defined as being greater than the value in the advertised maximum MTU supported, or shorter than the allowed Ethernet packet size." ::= { pwVcEnetStatsEntry 2 } --- --- Conformance description --- In this version of the draft, only objects level conformance is --- defined. More detailed conformance specifications is FFS. --- pwVcEnetGroups OBJECT IDENTIFIER ::= { pwVcEnetConformance 1 } pwVcEnetCompliances OBJECT IDENTIFIER ::= { pwVcEnetConformance 2 } pwVcEnetModuleCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for agent that support Ethernet PW." MODULE -- this module MANDATORY-GROUPS { pwVcEnetGroup, pwVcStatsGroup } GROUP pwVcEnetMplsPriGroup DESCRIPTION "Collection of objects defining classification to different PW based on the user's PRI bits mapping. This group is optional, and should be implemented only for MPLS PSN where only L-LSP or single OA E-LSP, exists, and different PSN COS is required based on the PRI mapping." ::= { pwVcEnetCompliances 1 } -- Units of conformance. pwVcEnetGroup OBJECT-GROUP OBJECTS { pwVcEnetVlanMode, pwVcEnetPortVlan, pwVcEnetPortIfIndex, pwVcEnetVcIfIndex, pwVcEnetFragSize, pwVcEnetCwStatus, pwVcEnetRowStatus, pwVcEnetStorageType } STATUS current DESCRIPTION "Collection of objects for basic Ethernet PW config." ::= { pwVcEnetGroups 1 } pwVcStatsGroup OBJECT-GROUP OBJECTS { pwVcEnetStatsIllegalVlan, pwVcEnetStatsIllegalLength } STATUS current DESCRIPTION "Collection of objects counting various PW level errors." ::= { pwVcEnetGroups 2 } pwVcEnetMplsPriGroup OBJECT-GROUP OBJECTS { pwVcEnetMplsPriMapping, pwVcEnetMplsPriMappingRowStatus, pwVcEnetMplsPriMappingStorageType } STATUS current DESCRIPTION "Collection of objects defining classification to different PW based on the user's PRI bits mapping. This group is optional, and should be implemented only for MPLS PSN where only L-LSP or single OA E-LSP exists, and different PSN COS is required based on the PRI mapping." ::= { pwVcEnetGroups 3 } END 8 Security Considerations There are a number of management objects defined in this MIB that have 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. SNMPv1 by itself is not a secure environment. Even if the network itself is secure (for example by using IPSec), even then, there is no control as to who on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB. It is recommended that the implementers consider the security features as provided by the SNMPv3 framework. Specifically, the use of the User-based Security Model RFC 2574 [RFC2574] and the View- based Access Control Model RFC 2575 [RFC2575] is recommended. It is then a customer/user responsibility to ensure that the SNMP entity giving access to an instance of this MIB, 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. 9 References [ENETPW] Martini et al, "Encapsulation Methods for Transport of Ethernet Frames Over IP/MPLS Networks", work-in- progress. [PWARCH] Bryant et al, "PWE3 Architecture", work-in-progress. [PWREQ] Xiao et al, "Requirements for Pseudo Wire Emulation Edge- to-Edge (PWE3)", work-in-progress. [PWLAYER] Bryant, et al., "Protocol Layering in PWE3", work-in- progress. [VPLS] Augustyn et al, "Requirements for Virtual Private LAN Services (VPLS)", work-in-progress. [PWTC] Nadeau, T., et al, "Definitions for Textual Conventions and OBJECT-IDENTITIES for Pseudo-Wires Management", work- in-progress. [PWMIB] Zelig et al, "Pseudo Wire (PW) Management Information Base", work-in-progress. [PWMPLSMIB] Zelig et al, "Pseudo Wire (PW) Over MPLS PSN Management Information Base", work-in-progress. [ENETLIKE] Flick, J., "Definitions of Managed Objects for the Ethernet-like Interface Types", work-in-progress. [IANAFamily]Internet Assigned Numbers Authority (IANA), ADDRESS FAMILY NUMBERS, (http://www.isi.edu/in- notes/iana/assignements/address-family-numbers), for MIB see: ftp://ftp.isi.edu/mib/ianaaddressfamilynumbers.mib [IFMIB] McCloghrie, K., and F. Kastenholtz, "The Interfaces Group MIB using SMIv2", RFC 2863, January 2000. [BCP14] Bradner, S., "Key words for use in RFCs to Indicate requirement Levels", BCP 14, RFC 2119, March 1997. [RFC2571] Harrington, D., Presuhn, R., and B. Wijnen, "An Architecture for Describing SNMP Management Frameworks", RFC 2571, April 1999. [RFC1155] Rose, M., and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP- based Internets", STD 16, RFC 1155, May 1990. [RFC1212] Rose, M., and K. McCloghrie, "Concise MIB Definitions", STD 16, RFC 1212, March 1991. [RFC1215] M. Rose, "A Convention for Defining Traps for use with the SNMP", RFC 1215, March 1991. [RFC2578] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J, Rose, M., and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999. [RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J, Rose, M., and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999. [RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J, Rose, M., and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999. [RFC1157] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple Network Management Protocol", STD 15, RFC 1157, May 1990. [RFC1901] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Introduction to Community-based SNMPv2", RFC 1901, January 1996. [RFC1906] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Transport Mappings for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1906, January 1996. [RFC2572] Case, J., Harrington D., Presuhn R., and B. Wijnen, "Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)", RFC 2572, April 1999. [RFC2574] Blumenthal, U., and B. Wijnen, "User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)", RFC 2574, April 1999. [RFC1905] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Protocol Operations for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1905, January 1996. [RFC2573] Levi, D., Meyer, P., and B. Stewart, "SNMPv3 Applications", RFC 2573, April 1999. [RFC2575] Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)", RFC 2575, April 1999. [RFC2570] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction to Version 3 of the Internet-standard Network Management Framework", RFC 2570, April 1999. 10 Author's Addresses David Zelig Corrigent Systems 126, Yigal Alon st. Tel Aviv, ISRAEL Phone: +972-3-6945273 Email: davidz@corrigent.com Thomas D. Nadeau Cisco Systems, Inc. 250 Apollo Drive Chelmsford, MA 01824 Email: tnadeau@cisco.com 11 Full Copyright Statement Copyright (C) The Internet Society (2000). All Rights Reserved. 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