CISCO-IETF-VRRP-MIB

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Organization: Cisco Systems Inc

Last Updated: 2005-11-17

Category: Cisco Devices, Routing Protocols

Description: Manages VRRP (Virtual Router Redundancy Protocol) instances and master/backup router elections on Cisco devices.

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What Is CISCO-IETF-VRRP-MIB?

CISCO-IETF-VRRP-MIB implements the IETF VRRP (Virtual Router Redundancy Protocol) standard for both IPv4 and IPv6 simultaneously on Cisco routers, providing default-gateway high availability. It exposes configuration data for virtual router groups (priority, virtual IP addressing) per interface as well as state data reflecting the current protocol status of each router in the group. Its central monitoring use is tracking the software status of the redundancy protocol itself -- which router currently holds the Master role, state transitions between init/backup/master, and failover events -- which is critical for catching an unplanned failover or a split-brain condition rather than physical component health. It is based on the standard IETF VRRP MIB, extended here for dual IPv4/IPv6 operation on a single interface. It is typically deployed on paired or grouped first-hop routers/Layer 3 switches providing redundant default gateways for a LAN. Network engineers evaluating or troubleshooting this functionality can download the CISCO-IETF-VRRP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-IETF-VRRP-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Cisco routers/Layer 3 switches configured as VRRP gateways

Monitoring Examples

The source excerpt for this MIB did not include specific object or table names, but per its description it models a VRRP virtual-router group per interface with fields for configured priority and current protocol state (init/backup/master). An administrator would poll each router's VRRP state object to confirm the expected router holds Master and that priorities are configured as intended; an unexpected state change, such as a backup router transitioning to master, indicates a gateway failover or a priority misconfiguration worth investigating.

What Can Be Monitored

VRRP virtual router state (master/backup)
VRRP priority configuration
failover/state-transition events
IPv4 and IPv6 VRRP group status

Imported Objects

From CISCO-SMI

ciscoExperiment

OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

MacAddress
RowStatus
TEXTUAL-CONVENTION
TimeInterval
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using cVrrpRouterChecksumErrors OID:

Select a Cisco routers/Layer 3 switch (VRRP gateways) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type cVrrpRouterChecksumErrors into the Find box to locate it in the OID tree, then select it and click OK. The total number of VRRP packets received with an invalid VRRP checksum value. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoVrrpMIB	1.3.6.1.4.1.9.10.999			This MIB describes objects used for managing Virtual Router Redundancy Protocol (VRRP) over IPv4 and IPv6 protocols. This MIB supports VRRP for IPv4 and IPv6 protocols simultaneously running on a given interface of a router.
cVrrpNotifications	1.3.6.1.4.1.9.10.999.0
NTF cVrrpNotificationNewMaster	1.3.6.1.4.1.9.10.999.0.1			The newMaster notification indicates that the sending agent has transitioned to 'Master' state.
NTF cVrrpNotificationProtoError	1.3.6.1.4.1.9.10.999.0.3			The error notification indicates that the sending agent has encountered the protocol error indicated by the value of cVrrpNotificationProtoErrorReason.
cVrrpOperations	1.3.6.1.4.1.9.10.999.1
INT cVrrpNotificationCntl	1.3.6.1.4.1.9.10.999.1.2	INTEGER	read-write	This object indicates whether the agent should generate the notifications defined in this MIB module. If the value of this object is 'true', then the notifications are generated. If the value of this object is 'false', then the notifications are not generated.
cVrrpOperationsTable	1.3.6.1.4.1.9.10.999.1.7		not-accessible	Unified Operations table for a VRRP router which consists of a sequence (i.e., one or more conceptual rows) of 'vrrpOperationsEntry' items.
cVrrpOperationsEntry	1.3.6.1.4.1.9.10.999.1.7.1		not-accessible	An entry in the cVrrpOperationsTable containing the operational characteristics of a virtual router. On a VRRP router, a given virtual router is identified by a combination of the IP version, VRID and ifIndex. Note that rows in this table can be distinguished on a multi-stacked device running VRRP over IPv4 and IPv6 on the same interface. Rows in the table cannot be modified unless the value of 'cVrrpOperationsState' has transitioned to 'initialize'
IPt cVrrpOperationsInetAddrType	1.3.6.1.4.1.9.10.999.1.7.1.1	InetAddressType	not-accessible	The type of Internet address of CVrrpOperationsEntry. This value applies to both cVrrpOperationsMasterIpAddr and cVrrpOperationsPrimaryIpAddr.
CVR cVrrpOperationsVrId	1.3.6.1.4.1.9.10.999.1.7.1.2	CVrId	not-accessible	This object contains the Virtual Router Identifier (VRID).
MAC cVrrpOperationsVirtualMacAddr	1.3.6.1.4.1.9.10.999.1.7.1.3	MacAddress	read-only	The virtual MAC address of the virtual router. Although the value of this object can be derived from the 'cVrrpOperationsVrId' object, i.e., 00-00-5E-00-01-(VRID) for IPv4 and 00-00-5E-00-02-(VRID) for IPv6, it is defined so that it is easily obtainable by a management application and can be included in VRRP-related SNMP notifications.
INT cVrrpOperationsState	1.3.6.1.4.1.9.10.999.1.7.1.4	INTEGER	read-only	The current state of the virtual router. This object has three defined values: - `initialize', which indicates that the virtual router is waiting for a startup event. - `backup', which indicates that 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.
I32 cVrrpOperationsPriority	1.3.6.1.4.1.9.10.999.1.7.1.5	Integer32	read-create	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 participate 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) for VRRP over IPv4 and hence not settable.
INT cVrrpOperationsVersion	1.3.6.1.4.1.9.10.999.1.7.1.6	INTEGER	read-create	This object contains the VRRP version on which this VRRP instance is running.
I32 cVrrpOperationsAddrCount	1.3.6.1.4.1.9.10.999.1.7.1.7	Integer32	read-only	The number of IP addresses that are associated with this virtual router. This number is equal to the number of rows in the cVrrpAssociatedAddrTable that correspond to a given IP version/VRID/ifIndex.
IP cVrrpOperationsMasterIpAddr	1.3.6.1.4.1.9.10.999.1.7.1.9	InetAddress	read-only	The master router's real IP address. This is the IP address listed as the source in VRRP advertisement last received by this virtual router.
IP cVrrpOperationsPrimaryIpAddr	1.3.6.1.4.1.9.10.999.1.7.1.10	InetAddress	read-create	In the case where there are more than one IP Address (associated IP addresses) for a given `ifIndex', this object is used to specify the IP address that will become the cVrrpOperationsMasterIpAddr', should the virtual router transition from backup state to master.
NUM cVrrpOperationsAdvInterval	1.3.6.1.4.1.9.10.999.1.7.1.11	TimeInterval	read-create	The time interval, in centiseconds, between sending advertisement messages. Only the master router sends VRRP advertisements.
T/F cVrrpOperationsPreemptMode	1.3.6.1.4.1.9.10.999.1.7.1.12	TruthValue	read-create	Controls whether a higher priority virtual router will preempt a lower priority master. If the value of this object is 'true', then the higer priority virtual router will preempt. If the value of this object is 'false', then the higer priority vritual router will not preempt.
T/F cVrrpOperationsAcceptMode	1.3.6.1.4.1.9.10.999.1.7.1.13	TruthValue	read-create	Controls whether a virtual router in Master state will accept packets addressed to the address owner's IPv6 address as its own if it is not the IPv6 address owner. If the value of this object is 'true', then the virtual router in Master state will accept. If the value of this object is 'false', then the virtual router in Master state will not accept.
TIM cVrrpOperationsUpTime	1.3.6.1.4.1.9.10.999.1.7.1.14	TimeStamp	read-only	This is the value of the `sysUpTime' object when this virtual router (i.e., the `vrrpOperState') transitioned out of `initialized'.
ROW cVrrpOperationsRowStatus	1.3.6.1.4.1.9.10.999.1.7.1.15	RowStatus	read-create	The row status variable, used in accordance to installation and removal conventions for conceptual rows. The rowstatus of a currently active row in the cVrrpOperationsTable is constrained by the operational state of the corresponding virtual router. When `cVrrpOperationsRowStatus' is set to active(1), no other objects in the conceptual row can be modified. To create a row in this table, a manager sets this object to either createAndGo(4) or createAndWait(5). Until instances of all corresponding columns are appropriately configured, the value of the corresponding instance of the `cVrrpOperationsRowStatus' column will be read as notReady(3). In particular, a newly created row cannot be made active(1) until (minimally) the corresponding instance of cVrrpOperationsInetAddrType, cVrrpOperationsVrId and cVrrpOperationsPrimaryIpAddr has been set and there is at least one active row in the `cVrrpAssociatedIpAddrTable' defining an associated IP address. notInService(2) should be used to administratively bring the row down.
cVrrpAssociatedIpAddrTable	1.3.6.1.4.1.9.10.999.1.8		not-accessible	The table of addresses associated with this virtual router.
cVrrpAssociatedIpAddrEntry	1.3.6.1.4.1.9.10.999.1.8.1		not-accessible	An entry in the table contains an IP address that is associated with a virtual router. The number of rows for a given IP version, VrID and ifIndex will equal the number of IP addresses associated (e.g., backed up) by the virtual router (equivalent to 'cVrrpOperationsIpAddrCount'). Rows in the table cannot be modified unless the value of `cVrrpOperationsState' has transitioned to `initialize'.
IPt cVrrpAssociatedInetAddrType	1.3.6.1.4.1.9.10.999.1.8.1.2	InetAddressType	not-accessible	The type of Internet address of VrrpAssociatedIpAddrEntry.
IP cVrrpAssociatedIpAddr	1.3.6.1.4.1.9.10.999.1.8.1.3	InetAddress	not-accessible	The assigned IP addresses that a virtual router is responsible for backing up.
ROW cVrrpAssociatedIpAddrRowStatus	1.3.6.1.4.1.9.10.999.1.8.1.4	RowStatus	read-create	The row status variable, used according to installation and removal conventions for conceptual rows. To create a row in this table, a manager sets this object to either createAndGo(4) or createAndWait(5). Setting this object to active(1) results in the addition of an associated address for a virtual router. Setting this object to createAndGo (4) results in creating a new instance of a conceptual row and setting it to active. The value of the other columns cannot be modified when the value of this object is active. Destroying the entry or setting it to destroy(6) removes the associated address from the virtual router. The use of other values is implementation-dependent.
INT cVrrpNotificationNewMasterReason	1.3.6.1.4.1.9.10.999.1.9	INTEGER	accessible-for-notify	This indicates the reason for NewMaster notification. Used by cVrrpNotificationNewMaster notification.
INT cVrrpNotificationProtoErrReason	1.3.6.1.4.1.9.10.999.1.10	INTEGER	accessible-for-notify	This indicates the reason for protocol error notification. Used by cVrrpNotificationProtoError notification.
cVrrpStatistics	1.3.6.1.4.1.9.10.999.2
C32 cVrrpRouterChecksumErrorsEx	1.3.6.1.4.1.9.10.999.2.1	Counter32	read-only	The total number of VRRP packets received with an invalid VRRP checksum value.
C32 cVrrpRouterVersionErrors	1.3.6.1.4.1.9.10.999.2.2	Counter32	read-only	The total number of VRRP packets received with an unknown or unsupported version number.
C32 cVrrpRouterVrIdErrors	1.3.6.1.4.1.9.10.999.2.3	Counter32	read-only	The total number of VRRP packets received with an invalid VRID for this virtual router.
cVrrpRouterStatisticsTable	1.3.6.1.4.1.9.10.999.2.5		not-accessible	Table of virtual router statistics.
cVrrpRouterStatisticsEntry	1.3.6.1.4.1.9.10.999.2.5.1		not-accessible	An entry in the table, containing statistics information about a given virtual router.
C32 cVrrpStatisticsBecomeMaster	1.3.6.1.4.1.9.10.999.2.5.1.1	Counter32	read-only	The total number of times that this virtual router's state has transitioned to MASTER. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the corresponding instance of cVrrpStatisticsDiscontinuityTime.
C32 cVrrpStatisticsAdvertiseRcvd	1.3.6.1.4.1.9.10.999.2.5.1.2	Counter32	read-only	The total number of VRRP advertisements received by this virtual router. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the corresponding instance of cVrrpStatisticsDiscontinuityTime.
C32 cVrrpStatisticsAdvIntervalErrors	1.3.6.1.4.1.9.10.999.2.5.1.3	Counter32	read-only	The total number of VRRP advertisement packets received for which the advertisement interval is different than the one configured for the local virtual router. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the corresponding instance of cVrrpStatisticsDiscontinuityTime.
C32 cVrrpStatisticsIpTtlErrors	1.3.6.1.4.1.9.10.999.2.5.1.4	Counter32	read-only	The total number of VRRP packets received by the Virtual router with IPv4 TTL (for VRRP over IPv4) or IPv6 Hop Limit (for VRRP over IPv6) not equal to 255. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the corresponding instance of cVrrpStatisticsDiscontinuityTime.
C32 cVrrpStatisticsPriZeroPktsRcvd	1.3.6.1.4.1.9.10.999.2.5.1.5	Counter32	read-only	The total number of VRRP packets received by the virtual router with a priority of '0'. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the corresponding instance of cVrrpStatisticsDiscontinuityTime.
C32 cVrrpStatisticsPriZeroPktsSent	1.3.6.1.4.1.9.10.999.2.5.1.6	Counter32	read-only	The total number of VRRP packets sent by the virtual router with a priority of '0'. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the corresponding instance of cVrrpStatisticsDiscontinuityTime.
C32 cVrrpStatisticsInvldTypePktsRcvd	1.3.6.1.4.1.9.10.999.2.5.1.7	Counter32	read-only	The number of VRRP packets received by the virtual router with an invalid value in the 'type' field. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the corresponding instance of cVrrpStatisticsDiscontinuityTime.
C32 cVrrpStatisticsAddressListErrors	1.3.6.1.4.1.9.10.999.2.5.1.8	Counter32	read-only	The total number of VRRP packets received for which the address list contained in the packets does not match the locally configured list that corresponds to rows in the cVrrpAssociatedAddrTable for the virtual router. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the corresponding instance of cVrrpStatisticsDiscontinuityTime.
C32 cVrrpStatisticsPacketLengthErrors	1.3.6.1.4.1.9.10.999.2.5.1.11	Counter32	read-only	The total number of packets received with a packet length less than the length of the VRRP header. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the corresponding instance of cVrrpStatisticsDiscontinuityTime.
TIM cVrrpStatisticsDiscontinuityTime	1.3.6.1.4.1.9.10.999.2.5.1.12	TimeStamp	read-only	The value of sysUpTime on the most recent occasion at which any one or more of this entry's counters suffered a discontinuity. If no such discontinuities have occurred since the last re-initialization of the local management subsystem, then this object contains a zero value.
U32 cVrrpStatisticsRefreshRate	1.3.6.1.4.1.9.10.999.2.5.1.13	Unsigned32	read-only	The minimum reasonable polling interval for this entry. This object provides an indication of the minimum amount of time required to update the counters in this entry.
C32 cVrrpStatisticsInvalidAuthType	1.3.6.1.4.1.9.10.999.2.5.1.14	Counter32	read-only	The total number of packets received with an unknown authentication type.
cVrrpConformance	1.3.6.1.4.1.9.10.999.3
cVrrpMIBCompliances	1.3.6.1.4.1.9.10.999.3.1
cVrrpMIBCompliance2	1.3.6.1.4.1.9.10.999.3.1.2			The compliance statement for both VRRP for IPv4 and VRRP for IPv6 implementations.
cVrrpMIBReadOnlyCompliance	1.3.6.1.4.1.9.10.999.3.1.3			The read-only compliance statement for all VRRP implementations VRRP for IPv4 and IPv6.
cVrrpMIBGroups	1.3.6.1.4.1.9.10.999.3.2
cVrrpOperationsGroup	1.3.6.1.4.1.9.10.999.3.2.5			Conformance group for VRRP over IPv4 and IPv6 operations.
cVrrpStatisticsGroup	1.3.6.1.4.1.9.10.999.3.2.6			Conformance group for VRRP over IPv4 and IPv6 statistics.
cVrrpNotificationInfoGroup	1.3.6.1.4.1.9.10.999.3.2.8			Conformance group for objects contained in VRRP notifications.
cVrrpNotificationsGroup	1.3.6.1.4.1.9.10.999.3.2.9			The VRRP MIB Notification Group.

RFC description

Cisco implementation of VRRP (Virtual Router Redundancy Protocol, RFC 2787) for managing virtual router failover and high availability.

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Download CISCO-IETF-VRRP-MIB