INTERNET-DRAFT B. Jewell April 12, 1999 D. Chuang 3Com, Inc. Definitions of Managed Objects for the Virtual Router Redundancy Protocol using SNMPv2 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. This internet draft expires on October 12, 1999. Abstract This specification defines an extension to the Management Information Base (MIB) for use with SNMP-based network management. In particular, it defines objects for configuring, monitoring, and controlling routers that employ the Virtual Router Redundancy Protocol (VRRP) [1]. This memo specifies a MIB module in a manner that is compliant with both the SNMPv2 SMI [5], and semantically identical to the SNMPv1 definitions [2]. draft-ietf-vrrp-mib-05.txt [Page 1] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 Table of Contents 1 The SNMPv2 Network Management Framework ............... 3 1.1 Object Definitions .................................. 3 2 Overview .............................................. 4 2.1 VRRP MIB Structure .................................. 4 2.2 Virtual Router Redundancy Protocol .................. 4 2.3 VRRP MIB Table Design ............................... 5 2.3.1 Relation to Interface Group ....................... 5 2.4 VRRP Scenarios ...................................... 5 2.4.1 Scenario #1 ....................................... 6 2.4.2 Scenario #2 ....................................... 8 3 Definitions ........................................... 11 4 Acknowledgements ...................................... 31 5 References ............................................ 31 6 Authors' Addresses .................................... 32 draft-ietf-vrrp-mib-05.txt [Page 2] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 1. The SNMPv2 Network Management Framework The SNMP Network Management Framework presently consists of three major components. They are: o the SMI, described in RFC 1902 [5] - the mechanisms used for describing and naming objects for the purpose of management. o the MIB-II, STD 17, RFC 1213 [4] - the core set of managed objects for the Internet suite of protocols. o the protocol, STD 15, RFC 1157 [3] and/or RFC 1905 [6], - the protocol for accessing managed objects. The Framework permits new objects to be defined for the purpose of experimentation and evaluation. 1.1. Object Definitions Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the subset of Abstract Syntax Notation One (ASN.1) defined in the SMI. In particular, each object type is named by an OBJECT IDENTIFIER, an administratively assigned name. The object type together with an object instance serves to uniquely identify a specific instantiation of the object. For human convenience, we often use a textual string, termed the descriptor, to also refer to the object type. The syntax of an object type defines the abstract data structure corresponding to that object type. The ASN.1 language is used for this purpose. However, the SMI [5] purposely restricts the ASN.1 constructs which may be used. These restrictions are explicitly made for simplicity. The encoding of an object type is simply how that object type is represented using the object type's syntax. Implicitly tied to the notion of an object type's syntax and encoding is how the object type is represented when being transmitted on the network. The SMI specifies the use of the basic encoding rules of ASN.1 [9], subject to the additional requirements imposed by the SNMP. draft-ietf-vrrp-mib-05.txt [Page 3] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 2. Overview This memo identifies the set of objects for configuring, monitoring, and controlling the Virtual Router Redundancy Protocol (VRRP), as defined in RFC 2338 [1]. VRRP specifies an election protocol that will allow one or more associated IP addresses to be assumed by another router in the event of a failure of the IP address(es) owner. Thus, IP traffic from a host using a failed router as a default gateway is transparently fowarded by the VRRP router that has assumed control. VRRP provides redundancy in routed networks without requiring configuration of dynamic routing or router discovery protocols on every end-host. 2.1. VRRP MIB Structure The VRRP MIB contains three conformance groups: - vrrpOperations Group: Objects related to VRRP router's configuration and control. - vrrpStatistics Group: Objects containing information useful in monitoring the operation of VRRP routers. - vrrpNotifications Group: Consists of objects and definitions for use in SNMP traps sent by VRRP routers. Tables in the MIB include the following: (1) The vrrpOperTable, which contains objects that define the operational characteristics of a VRRP router. Rows in this table correspond to instances of virtual routers. (2) The vrrpAssoIpAddrTable, which contains the addresses of the virtual router(s) that a given VRRP router is backing up. (3) The vrrpRouterStatsTable which contains the operating statistics for a VRRP router. 2.2. Virtual Router Redundancy Protocol This MIB is based on the following characteristics of VRRP as defined in the VRRP specification [1]. - A "VRRP router" is one that is configured to run the VRRP protocol in conjunction with one or more other VRRP routers attached to a LAN. draft-ietf-vrrp-mib-05.txt [Page 4] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 - A VRRP router can be running one or more instances of a virtual router. - A "virtual router" is an abstraction which consists of two or more physical routers associated by a Virtual Router Identifier (VRID). - An instance of a virtual router (on a physical VRRP router), can be uniquely identified by a combination of the 'IF Index' [4] and "Virtual Router Identifier" (VRID). - For each VRID there is a set of one or more "associated IP addresses" that are backed-up by the virtual router. 2.3. VRRP MIB Table Design The tables in the VRRP MIB are structured with the assumption that a VRRP network management application would likely be designed to display information or provide configuration about a VRRP router on a "per-virtual-router basis". Thus, the tables defined in the MIB consist of conceptual rows which are grouped in a manner to present a view of individual virtual routers with a minimal number of SNMP operations. 2.3.1. Relation to Interface Group (RFC 1573) [8]. Since a router can be participating in VRRP on one or more physical interfaces, "ifIndex" is used as an index into the tables defined in the VRRP MIB. 2.4. VRRP Scenarios The following section provides examples of how some of the objects in this MIB are instantiated for two different VRRP scenarios. KEY: ---- The labels in the following tables and diagrams correspond to the actual MIB objects as follows: if = vrrpOperIfIndex VrId = vrrpOperVrId State = vrrpOperState Prior = vrrpOperPriority AddrCnt = vrrpOperIpAddrCount draft-ietf-vrrp-mib-05.txt [Page 5] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 IpAddr = vrrpOperMasterIpAddr RowStat = vrrpOperRowStatus 2.4.1. VRRP Scenario #1 The following figure shows a simple network with two VRRP routers configured with two virtual routers. This sample topology is taken from the VRRP specification [1]. Addresses in '()' indicate the IP address of the default gateway for a given host, H1 - H4. In the diagram, "Interface" is used in the context defined in MIB-II [4]. VRID=1 VRID=2 +-----+ +-----+ | MR1 | | MR2 | | & | | & | | BR2 | | BR1 | +-----+ +-----+ IP A ---------->* *<---------- IP B Interface=I1 | | Interface=I2 | | | | ------------------+------------+-----+--------+--------+--------+-- ^ ^ ^ ^ | | | | (IP A) (IP A) (IP A) (IP A) | | | | +--+--+ +--+--+ +--+--+ +--+--+ | H1 | | H2 | | H3 | | H4 | +-----+ +-----+ +--+--+ +--+--+ ----- MIB Tables For VRRP Router "IP A": ----- vrrpOperTable ------------- | if | VrId | State | Prior | AddrCnt | IpAddr | ... | RowStat | +----+------+-------+-------+---------+--------+-( )-+---------+ | | | | | | | | | | I1 | 01 | M | 255 | 1 | A | | active | | | | | | | | | | +----+------+-------+-------+---------+--------+-( )-+---------+ | | | | | | | | | | I1 | 02 | B | 1-254 | 1 | B | | active | | | | | | | | | | +----+------+-------+-------+---------+--------+-( )-+---------+ draft-ietf-vrrp-mib-05.txt [Page 6] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpAssoIpAddrTable ------------------- | if | VrId | IP | RowStat | +----+------+-------+---------+ | | | | | | I1 | 01 | A | active | | | | | | +----+------+-------+---------+ | | | | | | I1 | 02 | B | active | | | | | | +----+------+-------+---------+ ----- MIB Tables For VRRP Router "IP B": ----- vrrpOperTable ------------- | if | VrId | State | Prior | AddrCnt | IpAddr | ... | RowStat | +----+------+-------+-------+---------+--------+-( )-+---------+ | | | | | | | | | | I2 | 01 | B | 1-254 | 1 | A | | active | | | | | | | | | | +----+------+-------+-------+---------+--------+-( )-+---------+ | | | | | | | | | | I2 | 02 | M | 255 | 1 | B | | active | | | | | | | | | | +----+------+-------+-------+---------+--------+-( )-+---------+ vrrpAssoIpAddrTable ------------------- | if | VrId | IP | RowStat | +----+------+-------+---------+ | | | | | | I2 | 01 | A | active | | | | | | +----+------+-------+---------+ | | | | | | I2 | 02 | B | active | | | | | | +----+------+-------+---------+ draft-ietf-vrrp-mib-05.txt [Page 7] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 NOTES: 1) "I1" and "I2" are used to designate IF indices on each respective router. 2) For "State": M = Master; B = Backup. 3) In the vrrpOperTable, a "priority" of 255 indicates that the respective router owns the IP address, e.g., this IP address is native to the router (i.e., "the IP Address Owner" [1]). 2.4.2. VRRP Scenario #2 The following figure shows a simple network with two virtual routers. Here, a single interface has been configured with two IP addresses. Again, addresses in () indicate the IP address of the default gateway for a given host, H1 - H2. VRID=1 VRID=2 +-----+ +-----+ | MR1 | | MR2 | | & | | & | | BR2 | | BR1 | +-----+ +-----+ IP A ---------->* *<---------- IP B IP C | | Interface=I2 Interface=I1 | | | | | | ------------------+------------+-----+--------+ ^ ^ | | (IP A) (IP B) | | +--+--+ +--+--+ | H1 | | H2 | +-----+ +-----+ draft-ietf-vrrp-mib-05.txt [Page 8] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 ----- MIB Tables For VRRP Router "IP A": ----- vrrpOperTable ------------- | if | VrId | State | Prior | AddrCnt | IpAddr | ... | RowStat | +----+------+-------+-------+---------+--------+-( )-+---------+ | | | | | | | | | | I1 | 01 | M | 255 | 2 | A | | active | | | | | | | | | | +----+------+-------+-------+---------+--------+-( )-+---------+ | | | | | | | | | | I1 | 02 | B | 1-254 | 1 | B | | active | | | | | | | | | | +----+------+-------+-------+---------+--------+-( )-+---------+ vrrpAssoIpAddrTable ------------------- | if | VrId | IP | RowStat | +----+------+-------+---------+ | | | | | | I1 | 01 | A | active | | | | | | +----+------+-------+---------+ | | | | | | I1 | 01 | C | active | | | | | | +----+------+-------+---------+ | | | | | | I1 | 02 | B | active | | | | | | +----+------+-------+---------+ draft-ietf-vrrp-mib-05.txt [Page 9] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 ----- MIB Tables For VRRP Router "IP B": ----- vrrpOperTable ------------- | if | VrId | State | Prior | AddrCnt | IpAddr | ... | RowStat | +----+------+-------+-------+---------+--------+-( )-+---------+ | | | | | | | | | | I2 | 01 | B | 1-254 | 2 | A | | active | | | | | | | | | | +----+------+-------+-------+---------+--------+-( )-+---------+ | | | | | | | | | | I2 | 02 | M | 255 | 1 | B | | active | | | | | | | | | | +----+------+-------+-------+---------+--------+-( )-+---------+ vrrpAssoIpAddrTable ------------------- | if | VrId | IP | RowStat | +----+------+-------+---------+ | | | | | | I2 | 01 | A | active | | | | | | +----+------+-------+---------+ | | | | | | I2 | 01 | C | active | | | | | | +----+------+-------+---------+ | | | | | | I2 | 02 | B | active | | | | | | +----+------+-------+---------+ draft-ietf-vrrp-mib-05.txt [Page 10] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 3. Definitions VRRP-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, Counter32, Integer32, IpAddress FROM SNMPv2-SMI -- RFC 1902 TEXTUAL-CONVENTION, RowStatus, MacAddress, TruthValue, TimeStamp FROM SNMPv2-TC -- RFC 1903 MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF -- RFC 1904 mib-2, ifIndex FROM RFC1213-MIB; vrrp MODULE-IDENTITY LAST-UPDATED "9904120900Z" ORGANIZATION "IETF VRRP Working Group" CONTACT-INFO "Brian R. Jewell Postal: 3Com Corporation 5400 BayFront Plaza Santa Clara, California 95052 Tel: +1 408 326 6173 E-Mail: bjewell@3com.com" DESCRIPTION "The MIB module to describe the VRRP Version 2 Protocol." ::= { mib-2 46 } -- Temporary. To be assigned by IANA. vrrpMIB OBJECT IDENTIFIER ::= { vrrp 1 } -- ******************************************************************* -- Textual Conventions -- ******************************************************************* VrId ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "A number which, along with an interface index (ifIndex), serves to uniquely identify a virtual router on a given VRRP router. A set of one or more associated addresses is assigned to a VRID." SYNTAX Integer32 (1..255) draft-ietf-vrrp-mib-05.txt [Page 11] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 -- ******************************************************************* -- VRRP MIB Groups -- ******************************************************************* vrrpOperations OBJECT IDENTIFIER ::= { vrrpMIB 1 } vrrpStatistics OBJECT IDENTIFIER ::= { vrrpMIB 2 } vrrpNotifications OBJECT IDENTIFIER ::= { vrrpMIB 3 } vrrpConformance OBJECT IDENTIFIER ::= { vrrpMIB 4 } -- ******************************************************************* -- Start of MIB objects -- ******************************************************************* vrrpNodeVersion OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "This value identifies the particular version of the VRRP supported by this node." REFERENCE "Virtual Router Redundancy Protocol, RFC 2338" DEFVAL { 2 } ::= { vrrpOperations 1 } vrrpTrapCntl OBJECT-TYPE SYNTAX INTEGER { enabled (1), disabled (2) } MAX-ACCESS read-write STATUS current DESCRIPTION "Indicates whether the VRRP-enabled router will generate SNMP traps for events defined in this MIB. 'Enabled' results in SNMP traps; 'disabled', no traps are sent." DEFVAL { enabled } ::= { vrrpOperations 2 } draft-ietf-vrrp-mib-05.txt [Page 12] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 -- ******************************************************************* -- VRRP Operations Table -- ******************************************************************* vrrpOperTable OBJECT-TYPE SYNTAX SEQUENCE OF VrrpOperEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Operations table for a VRRP router which consists of a sequence (i.e., one or more conceptual rows) of 'vrrpOperEntry' items." ::= { vrrpOperations 3 } vrrpOperEntry OBJECT-TYPE SYNTAX VrrpOperEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the vrrpOperTable containing the operational characteristics of a virtual router. On a VRRP router, a given virtual router is identified by a combination of the IF index and VRID. Rows in the table cannot be modified unless the value of `vrrpOperAdminState' is `disabled' and the `vrrpOperState' has transitioned to `initialize'." INDEX { ifIndex, vrrpOperVrId } ::= { vrrpOperTable 1 } draft-ietf-vrrp-mib-05.txt [Page 13] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 VrrpOperEntry ::= SEQUENCE { vrrpOperVrId VrId, vrrpOperVirtualMacAddr MacAddress, vrrpOperState INTEGER, vrrpOperAdminState INTEGER, vrrpOperPriority Integer32, vrrpOperIpAddrCount Integer32, vrrpOperMasterIpAddr IpAddress, vrrpOperPrimaryIpAddr IpAddress, vrrpOperAuthType INTEGER, vrrpOperAuthKey OCTET STRING, vrrpOperAdvertisementInterval Integer32, vrrpOperPreemptMode TruthValue, vrrpOperVirtualRouterUpTime TimeStamp, vrrpOperProtocol INTEGER, vrrpOperRowStatus RowStatus } vrrpOperVrId OBJECT-TYPE SYNTAX VrId MAX-ACCESS not-accessible STATUS current DESCRIPTION "This object contains the Virtual Router Identifier (VRID)." ::= { vrrpOperEntry 1 } draft-ietf-vrrp-mib-05.txt [Page 14] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpOperVirtualMacAddr OBJECT-TYPE SYNTAX MacAddress MAX-ACCESS read-only STATUS current DESCRIPTION "The virtual MAC address of the virtual router. This is derived as follows: 00-00-5E-00-01-. Where the first three octets consist of the IANA's OUI; The next two octets indicate the address block of the VRRP protocol; and the remaining octets consist of the VRID. Although this object can be derived from the 'vrrpOperVrId' object, it is included here, for completeness, so that it is easily obtainable by a management application and can be included in VRRP-related SNMP traps." ::= { vrrpOperEntry 2 } vrrpOperState OBJECT-TYPE SYNTAX INTEGER { initialize(1), backup(2), master(3) } MAX-ACCESS read-only STATUS current DESCRIPTION "The current state of the virtual router. This object has three defined values: - `initialize', which indicates that all the virtual router is waiting for a startup event. - `backup', which indicates the virtual router is monitoring the availability of the master router. - `master', which indicates that the virtual router is forwarding packets for IP addresses that are associated with this router. Setting the `vrrpOperAdminState' object (below) initiates transitions in the value of this object." ::= { vrrpOperEntry 3 } draft-ietf-vrrp-mib-05.txt [Page 15] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpOperAdminState OBJECT-TYPE SYNTAX INTEGER { up(1), down(2) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object will enable/disable the virtual router function. Setting the value to 'up', will transition the state of the virtual router from `initialize' to `backup' or `master'; setting the value to `down', will transition the router from `master' or `backup' to `initialize'. State transitions may not be immediate; they sometimes depend on other factors, such as the interface (IF) state. The `vrrpOperAdminState' object must be set to `down' prior to modifying the other read-create objects in the conceptual row. The value of the `vrrpOperRowStatus' object (below) must be `active', signifying that the conceptual row is valid (i.e., the objects are correctly set), in order for this object to be set to `up'." DEFVAL { down } ::= { vrrpOperEntry 4 } draft-ietf-vrrp-mib-05.txt [Page 16] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpOperPriority OBJECT-TYPE SYNTAX Integer32 (0..255) MAX-ACCESS read-create STATUS current DESCRIPTION "This object specifies the priority to be used for the virtual router master election process. Higher values imply higher priority. A priority of '0', although not settable, is sent by the master router to indicate that this router has ceased to particpate in VRRP and a backup virtual router should transition to become a new master. A priority of 255 is used for the router that owns the associated IP address(es)." DEFVAL { 100 } ::= { vrrpOperEntry 5 } vrrpOperIpAddrCount OBJECT-TYPE SYNTAX Integer32 (0..255) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of IP addresses that are associated with this virtual router. This number is equal to the number of rows in the vrrpAssoIpAddrTable that correspond to a given IF index/VRID pair." ::= { vrrpOperEntry 6 } vrrpOperMasterIpAddr OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-only STATUS current DESCRIPTION "The master router's real (primary) IP address. This is the IP address listed as the source in VRRP advertisement last received by this virtual router." ::= { vrrpOperEntry 7 } draft-ietf-vrrp-mib-05.txt [Page 17] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpOperPrimaryIpAddr OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-create STATUS current DESCRIPTION "In the case where there is more than one IP address for a given `ifIndex', this object is used to specify the IP address that will become the `vrrpOperMasterIpAddr', should the virtual router transition from backup to master. If this object is set to 0.0.0.0, the IP address which is numerically lowest will be selected." DEFVAL { '00000000'H } -- 0.0.0.0 ::= { vrrpOperEntry 8 } vrrpOperAuthType OBJECT-TYPE SYNTAX INTEGER { noAuthentication(1), -- VRRP protocol exchanges are not -- authenticated. simpleTextPassword(2), -- Exchanges are authenticated by a -- clear text password. ipAuthenticationHeader(3) -- Exchanges are authenticated using -- the IP authentication header. } MAX-ACCESS read-create STATUS current DESCRIPTION "Authentication type used for VRRP protocol exchanges between virtual routers. This value of this object is the same for a given ifIndex." DEFVAL { noAuthentication } ::= { vrrpOperEntry 9 } vrrpOperAuthKey OBJECT-TYPE SYNTAX OCTET STRING (SIZE (0..16)) MAX-ACCESS read-create STATUS current DESCRIPTION "The Authentication Key. This object is set according to the value of the 'vrrpOperAuthType' object ('simpleTextPassword' or 'ipAuthenticationHeader'). If the length of the value is less than 16 octets, the agent will left adjust and zero fill to 16 octets. The value of this object is the same for a given ifIndex. When read, vrrpOperAuthKey always returns an Octet String of length zero." ::= { vrrpOperEntry 10 } draft-ietf-vrrp-mib-05.txt [Page 18] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpOperAdvertisementInterval OBJECT-TYPE SYNTAX Integer32 (1..255) MAX-ACCESS read-create STATUS current DESCRIPTION "The time interval, in seconds, between sending advertisement messages. Only the master router sends VRRP advertisements." DEFVAL { 1 } ::= { vrrpOperEntry 11 } vrrpOperPreemptMode OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-create STATUS current DESCRIPTION "Controls whether a higher priority virtual router will preempt a lower priority master." DEFVAL { true } ::= { vrrpOperEntry 12 } vrrpOperVirtualRouterUpTime OBJECT-TYPE SYNTAX TimeStamp MAX-ACCESS read-only STATUS current DESCRIPTION "This is the value of the `sysUpTime' object when this virtual router (i.e., the `vrrpOperState') transitioned out of `initialized'." ::= { vrrpOperEntry 13 } vrrpOperProtocol OBJECT-TYPE SYNTAX INTEGER { ip (1), bridge (2), decnet (3), other (4) } MAX-ACCESS read-create STATUS current DESCRIPTION "The particular protocol being controlled by this Virtual Router." DEFVAL { ip } ::= { vrrpOperEntry 14 } draft-ietf-vrrp-mib-05.txt [Page 19] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpOperRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The row status variable, used in accordance to installation and removal conventions for conceptual rows. In the text that follows, the characteristics (i.e., whether readable, settable or both) of each value are indicated in parenthesis. The state that this object transitions to when it is set is based on a determination of whether the read-create objects in the row have been correctly initialized for virtual router operation. A row in which not all of the objects are correctly set is considered `incomplete'. The rowstatus of a currently active row in the vrrpOperTable is also constrained by the operational state of the corresponding virtual router. Prior to setting this object from `active' to a different value, the `vrrpOperAdminState' object must be set to `down', and the `vrrpOperState' object be transitioned to `initialize'. The rowstatus column has six defined values: - `active' (read/set). When this value is read, it indicates that all the read-create objects (in the row) required for virtual router operation have been correctly initialized such that the respective virtual router can be made operational by setting the `vrrpOperAdminState' to `up'. When set to `active', no other objects in the conceptual row, with the exception of `vrrpOperAdminState', can be modified. When set, the agent will transition the value of rowstatus to `notReady' if the row is incomplete. - `notInService' (read/set), which when set, allows the objects in the row to be modified by a management station, thus changing the operational characteristics of the corresponding virtual router. - `notReady' (read). The agent sets the object to this state to indicate that the conceptual row exists, but is lacking initialization of one or more objects required for virtual router operation. - `createAndGo' (set), which is set by a management draft-ietf-vrrp-mib-05.txt [Page 20] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 station wishing to create a new instance of a virtual router and to have its status automatically set to `active', making it available for use by a virtual router. Upon receiving a request to set the rowstatus to this value, the agent transitions the rowstatus to `active' if the other settable objects in the row have been correctly initialized. If the row is incomplete, the agent transitions the state to `notReady'. - `createAndWait' (set), which is set by a management station wishing to create a new instance of a virtual router but not make it available for use. When this value is set, rowstatus transitions to `notInService' if the row has been correctly initialized; if the row is incomplete, rowstatus will become `notReady'. - `destroy' (set), which deletes the conceptual row, and hence, the corresponding instance of a virtual router." ::= { vrrpOperEntry 15 } -- ******************************************************************* -- VRRP Associated IP Address Table -- ******************************************************************* vrrpAssoIpAddrTable OBJECT-TYPE SYNTAX SEQUENCE OF VrrpAssoIpAddrEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The table of addresses associated with this virtual router." ::= { vrrpOperations 4 } draft-ietf-vrrp-mib-05.txt [Page 21] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpAssoIpAddrEntry OBJECT-TYPE SYNTAX VrrpAssoIpAddrEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the table contains an IP address that is associated with a virtual router. The number of rows for a given ifIndex and VrId will equal the number of IP addresses associated (e.g., backed up) by the virtual router (equivalent to 'vrrpOperIpAddrCount'). Rows in the table cannot be modified unless the value of `vrrpOperAdminState' is `disabled' and the `vrrpOperState' has transitioned to `initialize'." INDEX { ifIndex, vrrpOperVrId, vrrpAssoIpAddr } ::= { vrrpAssoIpAddrTable 1 } VrrpAssoIpAddrEntry ::= SEQUENCE { vrrpAssoIpAddr IpAddress, vrrpAssoIpAddrRowStatus RowStatus } vrrpAssoIpAddr OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS not-accessible STATUS current DESCRIPTION "The assigned IP addresses that a virtual router is responsible for backing up." ::= { vrrpAssoIpAddrEntry 1 } vrrpAssoIpAddrRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The row status variable, used according to installation and removal conventions for conceptual rows. Setting this object to `active' or 'createAndGo' results in the addition of an associated address for a virtual router. Destroying the entry or setting it to 'notInService' removes the associated address from the virtual router. The use of other values is implementation-dependent." ::= { vrrpAssoIpAddrEntry 2 } draft-ietf-vrrp-mib-05.txt [Page 22] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 -- ******************************************************************* -- VRRP Router Statistics -- ******************************************************************* vrrpRouterChecksumErrors OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of VRRP packets received with an invalid VRRP checksum value." ::= { vrrpStatistics 1 } vrrpRouterVersionErrors OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of VRRP packets received with an unknown or unsupported version number." ::= { vrrpStatistics 2 } vrrpRouterVrIdErrors OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of VRRP packets received with an invalid VRID for this virtual router." ::= { vrrpStatistics 3 } -- ******************************************************************* -- VRRP Router Statistics Table -- ******************************************************************* vrrpRouterStatsTable OBJECT-TYPE SYNTAX SEQUENCE OF VrrpRouterStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Table of virtual router statistics." ::= { vrrpStatistics 4 } draft-ietf-vrrp-mib-05.txt [Page 23] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpRouterStatsEntry OBJECT-TYPE SYNTAX VrrpRouterStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the table, containing statistics information about a given virtual router." AUGMENTS { vrrpOperEntry } ::= { vrrpRouterStatsTable 1 } VrrpRouterStatsEntry ::= SEQUENCE { vrrpStatsBecomeMaster Counter32, vrrpStatsAdvertiseRcvd Counter32, vrrpStatsAdvertiseIntervalErrors Counter32, vrrpStatsAuthFailures Counter32, vrrpStatsIpTtlErrors Counter32, vrrpStatsPriorityZeroPktsRcvd Counter32, vrrpStatsPriorityZeroPktsSent Counter32, vrrpStatsInvalidTypePktsRcvd Counter32, vrrpStatsAddressListErrors Counter32, vrrpStatsInvalidAuthType Counter32, vrrpStatsAuthTypeMismatch Counter32, vrrpStatsPacketLengthErrors Counter32 } vrrpStatsBecomeMaster OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of times that this virtual router's state has transitioned to MASTER." ::= { vrrpRouterStatsEntry 1 } draft-ietf-vrrp-mib-05.txt [Page 24] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpStatsAdvertiseRcvd OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of VRRP advertisements received by this virtual router." ::= { vrrpRouterStatsEntry 2 } vrrpStatsAdvertiseIntervalErrors OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of VRRP advertisement packets received for which the advertisement interval is different than the one configured for the local virtual router." ::= { vrrpRouterStatsEntry 3 } vrrpStatsAuthFailures OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of VRRP packets received that do not pass the authentication check." ::= { vrrpRouterStatsEntry 4 } vrrpStatsIpTtlErrors OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of VRRP packets received by the virtual router with IP TTL (Time-To-Live) not equal to 255." ::= { vrrpRouterStatsEntry 5 } vrrpStatsPriorityZeroPktsRcvd OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of VRRP packets received by the virtual router with a priority of '0'." ::= { vrrpRouterStatsEntry 6 } draft-ietf-vrrp-mib-05.txt [Page 25] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpStatsPriorityZeroPktsSent OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of VRRP packets sent by the virtual router with a priority of '0'." ::= { vrrpRouterStatsEntry 7 } vrrpStatsInvalidTypePktsRcvd OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of VRRP packets received by the virtual router with an invalid value in the 'type' field." ::= { vrrpRouterStatsEntry 8 } vrrpStatsAddressListErrors OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of packets received for which the address list does not match the locally configured list for the virtual router." ::= { vrrpRouterStatsEntry 9 } vrrpStatsInvalidAuthType OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of packets received with an unknown authentication type." ::= { vrrpRouterStatsEntry 10 } vrrpStatsAuthTypeMismatch OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of packets received with 'Auth Type' not equal to the locally configured authentication method (`vrrpOperAuthType')." ::= { vrrpRouterStatsEntry 11 } draft-ietf-vrrp-mib-05.txt [Page 26] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpStatsPacketLengthErrors OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of packets received with a packet length less than the length of the VRRP header." ::= { vrrpRouterStatsEntry 12 } -- ******************************************************************* -- Trap Definitions -- ******************************************************************* vrrpTraps OBJECT IDENTIFIER ::= { vrrpNotifications 1 } vrrpTrapPacketSrc OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS accessible-for-notify STATUS current DESCRIPTION "The IP address of an inbound VRRP packet. Used by vrrpTrapAuthFailure trap." ::= { vrrpTraps 1 } vrrpTrapAuthErrorType OBJECT-TYPE SYNTAX INTEGER { invalidAuthType (1), authTypeMismatch (2), authFailure (3) } MAX-ACCESS accessible-for-notify STATUS current DESCRIPTION "Potential types of configuration conflicts. Used by vrrpAuthFailure trap." ::= { vrrpTraps 2 } vrrpTrapNewMaster NOTIFICATION-TYPE OBJECTS { ifIndex, vrrpOperVrId } STATUS current DESCRIPTION "The newMaster trap indicates that the sending agent has transitioned from 'Backup' state to 'Master' state." ::= { vrrpTraps 3 } draft-ietf-vrrp-mib-05.txt [Page 27] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpTrapAuthFailure NOTIFICATION-TYPE OBJECTS { ifIndex, vrrpOperVrId, vrrpTrapPacketSrc, vrrpTrapAuthErrorType } STATUS current DESCRIPTION "A vrrpAuthFailure trap signifies that a packet has been received from a router whose authentication key or authentication type conflicts with this router's authentication key or authentication type. Implementation of this trap is optional." ::= { vrrpTraps 4 } -- ******************************************************************* -- Conformance Information -- ******************************************************************* vrrpMIBCompliances OBJECT IDENTIFIER ::= { vrrpConformance 1 } vrrpMIBGroups OBJECT IDENTIFIER ::= { vrrpConformance 2 } -- ................................................................... -- Compliance Statements -- ................................................................... vrrpMIBCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The core compliance statement for all VRRP implementations." MODULE -- this module MANDATORY-GROUPS { vrrpOperGroup , vrrpStatsGroup } ::= { vrrpMIBCompliances 1 } draft-ietf-vrrp-mib-05.txt [Page 28] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 -- ................................................................... -- Conformance Groups -- ................................................................... vrrpOperGroup OBJECT-GROUP OBJECTS { vrrpNodeVersion, vrrpTrapCntl, vrrpOperVrId, vrrpOperVirtualMacAddr, vrrpOperState, vrrpOperAdminState, vrrpOperPriority, vrrpOperIpAddrCount, vrrpOperMasterIpAddr, vrrpOperPrimaryIpAddr, vrrpOperAuthType, vrrpOperAuthKey, vrrpOperAdvertisementInterval, vrrpOperPreemptMode, vrrpOperVirtualRouterUpTime, vrrpOperProtocol, vrrpOperRowStatus, vrrpAssoIpAddr, vrrpAssoIpAddrRowStatus } STATUS current DESCRIPTION "Conformance group for VRRP operations." ::= { vrrpMIBGroups 1 } draft-ietf-vrrp-mib-05.txt [Page 29] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 vrrpStatsGroup OBJECT-GROUP OBJECTS { vrrpRouterChecksumErrors, vrrpRouterVersionErrors, vrrpRouterVrIdErrors, vrrpStatsBecomeMaster, vrrpStatsAdvertiseRcvd, vrrpStatsAdvertiseIntervalErrors, vrrpStatsAuthFailures, vrrpStatsIpTtlErrors, vrrpStatsPriorityZeroPktsRcvd, vrrpStatsPriorityZeroPktsSent, vrrpStatsInvalidTypePktsRcvd, vrrpStatsAddressListErrors, vrrpStatsInvalidAuthType, vrrpStatsAuthTypeMismatch, vrrpStatsPacketLengthErrors } STATUS current DESCRIPTION "Conformance group for VRRP statistics." ::= { vrrpMIBGroups 2 } END draft-ietf-vrrp-mib-05.txt [Page 30] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 4. Acknowledgements The authors would like to thank Danny Mitzel, Venkat Prasad, Al Pham, Robert Hinden, Venkat Prasad, Barbera Denny, Fred Baker, Jeff Case, Flavio Fernandes, Acee Lindem and Scott Barvick for their comments and suggestions. 5. References [1] Knight, S., Weaver, D., Whipple, D., Hinden, R., Mitzel, D., Hunt, P., Higginson, P., Shand, M., Lindem, A., "Virtual Router Redundancy Protocol", RFC 2338. [2] Rose, M., and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based Internets", STD 16, RFC 1155, May 1990. [3] Case, J., Fedor, M., Schoffstall, M., Davin, J., "Simple Network Management Protocol (SNMP)", STD 15, RFC 1157, May 1990. [4] McCloghrie, K., and M. Rose, "Management Information Base for Network Management of TCP/IP-based internets - MIB-II", STD 17, RFC 1213, March 1991. [5] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Structure of Management Information for version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1902, January 1996. [6] SNMPv2 Working Group, J. Case, K. McCloghrie, M. Rose, and S. Waldbusser, "Protocol Operations for version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1905, January 1996. [7] Postel, J., Reynolds, J., "Instructions to RFC Authors", RFC 2223, October 1997. [8] McCloghrie K., and F. Kastenholz, "Evolution of the Interfaces Group of MIB-II", RFC 1573, January 1994. [9] Information processing systems - Open Systems Interconnection, "Specification of Basic Encoding Rules for Abstract Syntax Notation One (ASN.1)", International Organization for Standardization, International Standard 8825, December 1987. draft-ietf-vrrp-mib-05.txt [Page 31] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 6. Authors' Addresses Brian R. Jewell 3Com, Inc. 5400 Bayfront Plaza Santa Clara, CA 95052 US Phone: +1 408 326 6173 EMail: bjewell@3com.com David Chuang 3Com, Inc. 5400 Bayfront Plaza Santa Clara, CA 95052 US Phone: +1 408 326 6610 EMail: david_chuang@3com.com draft-ietf-vrrp-mib-05.txt [Page 32] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 -- ------------------------------------------------------------------- -- Change Log -- ------------------------------------------------------------------- This section tracks changes made during revisions of this document. It will be deleted when the document is published as an RFC. * March, 1999: Changes in 5th revision (draft-ietf-vrrp-mib-05.txt): - Objects under "vrrpRouterStatsEntry" were renumbered. OID's became out-of-sequence due to changes made in the last revision (04). - Format of section numbers was changed ('.' added) to be consistant with other RFC's. - Changed the type of "vrrpNodeVersion" from INTEGER to Integer32. Also made DEFVAL (for this object) a decimal number. - A few spelling and typographical corrections were made. - Revisions were made to the format of some of the references to make then more concise and consistant. - Reworded the Overview section to attempt to make the description of VRRP more in-line with the VRRP RFC. * January, 1999: Changes in 4th revision (draft-ietf-vrrp-mib-04.txt): - "vrrpNodeVersion" SYNTAX changed from OCTET STRING to INTEGER. - Removed the REFERENCE clause from "vrrpOperVirtualMacAddr", as it was deemed redundant. - The range of vrrpOperAddrCount was changed from (1..255) to (0..255). This reflects the fact that a row might be created in the vrrpOperTable *prior* to creating a row in the vrrpAssoIpAddrTable. - Removed DEFVAL clause from "vrrpOperAuthKey" as unnecessary. - Moved the following objects out of the "vrrpRouterStatsTable" to become "global" VRRP router objects: "vrrpStatsChecksunErrors", "vrrpStatsVersionErrors", "vrrpStatsVrIdErrors". Each of these was renamed "vrrpRouter*", accordingly (since they are no longer members of the vrrpRouterStatsTable. The reason for this change is that, when any of these events occur, attempting to map the packet, with possible corruption of the VRID (or other fields), into a row of the vrrpRouterStatsTable would be risky, at best. - Removed "vrrpOperVirtualMacAddr" from the "vrrpTrapNewMaster". Since the virtual MAC can be derived from the VR ID, this was extra payload in the trap. - removed "vrrpTrapConfigErrorType" and "vrrpTrapPacketSrc" from conformance groups, as these are not mandatory objects. - Added new object, "vrrpOperPrimaryIpAddr" to vrrpOperTable. This object allows for designation of the vrrp IP primary address on an interface with multiple IP addresses, should this draft-ietf-vrrp-mib-05.txt [Page 33] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 virtual router transition from backup to master. - Changed vrrpRouterStatsEntry to AUGMENT the vrrpOperEntry, since there is a one-to-one correspondence between these two objects and they are indexed with identical parmeters. - Addded new object, vrrpStatsPacketLengthErrors, to the statistics table. - Changed the description for "vrrpStatsSecurityViolations" to apply to *all* types of authentication failures, as opposed to cleartext auth failures only, which it previously stated. - Renamed "vrrpTrapConfigErrorType" object to "vrrpTrapAuthErrorType" and added a new enumeration for "authentication failures". - Renamed "vrrpStatsAuthTypeErrors" to "vrrpStatsAuthTypeMismatch". - Renamed "vrrpStatsSecurityViolations" to " vrrpStats- AuthenticationFailures" * November, 1998: Changes in 3rd revision (draft-ietf-vrrp-mib-03.txt): - Changed name of "vrrpAssoIpAddrStatus" object to "vrrpAssoIpAddrRowStatus" for consistancy with similar object in vrrpOperTable. - Changed name of "vrrpOperControl" object to "vrrpOperAdminState" and enhanced description clause. - Renumbered the objects in both the vrrpOperTable and vrrpAssoIpAddrTable. The first objects in the tables started with an OID of '2', when they should have started with '1'. - Changed the name of "vrrpStatsUnknownAuthType" to "vrrpStatsInvalidAuthType" as per suggestion that it was more concise. - Rewrote the descriptions for the table Entry objects and the rowstatus objects to make the process of row creation and deletion more clear. Each enumeration of the rowstatus object in the "vrrpOperTable" is now clearly explained. - Changed MAX-ACCESS to "read-create" on the "vrrpOperAuthType" and "vrrpOperAuthKey" objects. This was done with the assumption the the VRRP RFC will change to make these attributes defined on a "per-virtual-router-basis" as was proposed at the August (1998) IETF Meeting. * July, 1998: Changes in 2nd revision (draft-ietf-vrrp-mib-02.txt): - A number of changes were made to the textual content of the draft as per feedback received at the last WG meeting. These changes were too numerous to document individually in this section. - The size of the "vrrpNodeVersion" object has been changed from 2 octets to 1 octet. draft-ietf-vrrp-mib-05.txt [Page 34] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 - References to obsoleted RFC's have been replaced by references to later documents. Notably, references to RFC's 1442, 1443 and 1444 have been replaced by RFC 1902, RFC 1903 and RFC 1904, respectively. - The description for the "vrrpOperControl" was changed to reflect the fact that a virtual router does not necessarily transition directly from initialize state -> backup state. The description for the "vrrpStatsBecomeMaster" was also changed to more accurately convey this fact. - The SYNTAX of the "vrrpOperIpAddrCount" was changed to reflect the fact that a virtual router can support only up to 255 backup IP addresses. - Descriptions for vrrpOperAuthType and vrrpOperAuthKey expanded to indicate the per-interface assignment. - SYNTAX of vrrpOperPreemptMode object changed from INTEGER to 'truthValue' - The OIDs for the VRRP traps were fixed; incorrect ident- ifiers ('vrrpOperations') had been used in OID assignments. - The SYNTAX for the 'vrrpOperPriority' object was corrected to indicate that this can have a value of '0'. - The vrrpOperHMACMD5Key object was deleted. It was combined with the vrrpOperAuthKey object, whose SYNTAX was adjusted accordingly. - OID for 'vrrpTraps' changed to '{ vrrpNotifications 1 }' - The 'vrrpStatsPasswdSecurityViolations' and 'vrrpStatsHmac- SecurityViolations' objects have been combined into a single 'vrrpStatsSecurityViolations' object; this was suggested to avoid redundancy. - As per the last WG meeting, the 'vrrpAssoIpAddrIndex' object has been deleted from the 'vrrpAssoIpAddrTable'and replaced by 'vrrpAssoIpAddr'. - Removed references to 'vrrpAssoIpAddrIndex' in samples. - Added new object 'vrrpOperProtocol' to 'VrrpOperEntry'. - MAX-ACCESS for the 'vrrpOperVrId' object changed to 'not-accessible', as per RFC1902 (auxilary objects). - SYNTAX for 'vrrpOperVirtualRouterUpTime' changed to 'TimeStamp'. - Added importation of 'TruthValue'and 'TimeStamp' to accomodate changes listed above. Deleted importation of 'TimeTicks'. - Changed MAX-ACCESS to 'accessible-for-notify' for 'vrrpTrapPacketSrc' and 'vrrpTrapConfigErrorType' objects. - In the sample tables, the "if" values were incorrect for the sample tables for "IP B" (they used to read "I1"). - MAX-ACCESS for 'vrrpOperAuthType' and 'vrrpOperAuthKey' changed to 'read-only', since these objects are defined on a per-interface basis. - Overall review and editing of Section 5.0 (References) with deletion of references not used in this document. Also, added draft-ietf-vrrp-mib-05.txt [Page 35] INTERNET-DRAFT VRRP MIB Using SNMPv2 April 12, 1999 reference '9'. Concerns: --------- - Keep the 'vrrpTrapAuthFailure' trap? - Remove 'vrrpTrapPacketSrc' and 'vrrpTrapConfigErrorType' from compliances? Only used for 'vrrpTrapAuthFailure' trap. * 3/4/1998: Changes in 1st revision (draft-ietf-vrrp-mib-01.txt): - Overall review and editing of document text and object descriptions from feedback received at December 1997 IETF meeting. More specifically the changes made along these lines include the following: -- Cleaned up Section 5.0 ("References") and validated. -- Modifed diagram for VRRP Scenario #2 (Section 2.4.2). -- VRRP Overview (Section 2.0) rewritten to be more in-line with latest revision (05) of VRRP RFC Draft. -- Description of "VrId" Textual convention rewritten. - MAX-ACCESS of vrrpTrapCntl object changed to "read-write". - Changed SYNTAX of "vrrpOperVirtualMacAddr" object from "PhyAddress" to "MacAddress". - Changed the syntax of the "vrrpOperPriority" object so upper value can be 255. - Change MAX-ACCESS for "vrrpOperAuthType" object from read-only to read-create. - Added three new objects to "vrrpRouterStatsTable": "vrrpStatsAddressListErrors", "vrrpStatsUnknownAuthType" and "vrrpStatsAuthTypeErrors". - Removed "vrrpStatsUnknownPacketType" object, as it was redundant (with "vrrpStatsInvalidPacketType"). - Removed the "vrrpOperIfIndex" object to use "ifIndex" (which is actually equivalent) instead. * 11/19/97 (vft-ietf-vrrp-mib-00.txt) - Initial Draft draft-ietf-vrrp-mib-05.txt [Page 36]