ENTERASYS-VRRP-EXT-MIB

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Organization: Enterasys Networks, Inc

Last Updated: 2009-08-10

Category: Protocol: VRRP, Vendor: Enterasys/Cabletron

Description: Enterasys Networks proprietary VRRP extension MIB providing additional VRRP configuration objects beyond the IETF standard.

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What Is ENTERASYS-VRRP-EXT-MIB?

ENTERASYS-VRRP-EXT-MIB is an Enterasys Networks proprietary MIB module that extends the standard VRRP (Virtual Router Redundancy Protocol) MIB with additional configuration objects not covered by the IETF specification. It exposes per-interface VRRP operational state along with vendor-specific extensions such as accept-mode, preempt-delay timing, and a table of "critical" IP addresses whose reachability influences failover priority. It functions mainly as a software/protocol-status monitoring MIB: administrators track operational state (master/backup) and critical-IP-address health per virtual router to understand why a gateway redundancy group failed over, and to confirm preemption timing and priority behavior match the intended configuration. It explicitly extends and depends on the standard VRRP MIB per the IETF VRRP draft/RFC, supplementing rather than replacing its base objects. It is typically deployed on Enterasys switches and routers acting as redundant default gateways in enterprise LAN environments. Network engineers evaluating or troubleshooting this functionality can download the ENTERASYS-VRRP-EXT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ENTERASYS-VRRP-EXT-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

Enterasys Networks switches and routers

Monitoring Examples

An operator would poll etsysVrrpExtOperTable/etsysVrrpExtOperEntry to check etsysVrrpExtOperState (master/backup) for a virtual router instance, and etsysVrrpExtOperPreemptModeDelay to confirm preemption is delayed as configured to avoid flapping. etsysVrrpExtCriticalIpAddrTable, indexed per critical address, would be monitored via etsysVrrpExtCriticalIpAddrState to detect when a tracked upstream IP becomes unreachable, which would trigger a priority reduction and potential failover. etsysVrrpExtOperAcceptMode reveals whether the virtual router accepts packets addressed to the virtual IP even when not master, relevant when diagnosing unexpected traffic handling during a failover.

What Can Be Monitored

VRRP operational state (master/backup)
preempt-mode delay
critical IP address reachability/state
critical IP address priority
accept-mode configuration

Imported Objects

From ENTERASYS-MIB-NAMES

etsysModules

OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus

From VRRP-MIB

VrId
vrrpOperationsInetAddrType

How to Use in IPNetwork Monitor

Example using etsysVrrpExtOperState OID:

Select an Enterasys Networks switch/router (VRRP extensions) 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 etsysVrrpExtOperState into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The current state of the virtual router — initialize, backup, master, ifDown, or preemptDelay. 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 an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the value is 'ifDown', or it changes between initialize/backup/master unexpectedly, since which role is correct for this VRRP router depends on your redundancy configuration and an unplanned change often indicates a failover. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
etsysVrrpExtMIB	1.3.6.1.4.1.5624.1.2.64			The Enterasys Networks Proprietary MIB module for entities implementing VRRP. This MIB provides read-write access to configuration objects not provided in the standard VRRP MIB (draft-ietf-vrrp-unified-spec-02.txt).
etsysVrrpExtOperations	1.3.6.1.4.1.5624.1.2.64.1
etsysVrrpExtOperTable	1.3.6.1.4.1.5624.1.2.64.1.1		not-accessible	Operations table for a VRRP router which consists of a sequence (i.e., one or more conceptual rows) of 'EtsysVrrpExtOperEntry' items.
etsysVrrpExtOperEntry	1.3.6.1.4.1.5624.1.2.64.1.1.1		not-accessible	An entry in the etsysVrrpExtOperTable containing the operational characteristics of a virtual router. On a VRRP router, a given virtual router is identified by a combination of the ifIndex and VRID.
VRI etsysVrrpExtOperVrId	1.3.6.1.4.1.5624.1.2.64.1.1.1.1	VrId	not-accessible	This object contains the Virtual Router Identifier (VRID).
INT etsysVrrpExtOperStateEx	1.3.6.1.4.1.5624.1.2.64.1.1.1.2	INTEGER	read-only	The current state of the virtual router. This object has six 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. - 'ifDown', which indicates that the interface the virtual router is configured on is operationally down. - 'preemptDelay', which indiciates that the virtual router is going to transition to master once the preempt delay timer has expired.
INT etsysVrrpExtOperAcceptMode	1.3.6.1.4.1.5624.1.2.64.1.1.1.3	INTEGER	read-write	Controls whether a virtual router in Master state will accept packets addressed to the address owner's address as its own if it is not the address owner. Default is False.
I32 etsysVrrpExtOperPreemptModeDelay	1.3.6.1.4.1.5624.1.2.64.1.1.1.4	Integer32	read-write	The time interval, in seconds, before the backup router will become master if vrrpOperPreemptMode is set to true.
I32 etsysVrrpExtOperCriticalIpAddrCount	1.3.6.1.4.1.5624.1.2.64.1.1.1.5	Integer32	read-only	The number of Critical IP addresses that are associated with this virtual router. This number is equal to the number of rows in the etsysVrrpExtCriticalIpAddrTable that correspond to a given IF index/VRID pair.
etsysVrrpExtCriticalIpAddrTable	1.3.6.1.4.1.5624.1.2.64.1.2		not-accessible	The table of critical IP addresses associated with a virtual router.
etsysVrrpExtCriticalIpAddrEntry	1.3.6.1.4.1.5624.1.2.64.1.2.1		not-accessible	An entry in the table contains an IP address that is a critical interface. If the IP address goes down then the operational priority shall be decremented by the value of the critical IP priority. The operation priority shall not be adjusted for virtual routers who own the associated address
IP etsysVrrpExtCriticalIpAddr	1.3.6.1.4.1.5624.1.2.64.1.2.1.1	InetAddress	not-accessible	The assigned IP addresses that represents a critical interface.
I32 etsysVrrpExtCriticalIpAddrPriority	1.3.6.1.4.1.5624.1.2.64.1.2.1.2	Integer32	read-create	This object specifies value the virtual routers operational priority should be decremented by when a critical interface goes down.
INT etsysVrrpExtCriticalIpAddrState	1.3.6.1.4.1.5624.1.2.64.1.2.1.3	INTEGER	read-only	The current state of the critical IP address. This object has two defined values - `up', which indicates that critical IP is reachable. - `down', which indicates that critical IP is not reachable.
ROW etsysVrrpExtCriticalIpAddrRowStatus	1.3.6.1.4.1.5624.1.2.64.1.2.1.4	RowStatus	read-create	The row status variable, used according to installation and removal conventions for conceptual rows. Setting this object to createAndGo(4) or createAndWait(5) results in the addition of an associated address for a virtual router. Destroying(6) the entry or setting it to notInService(2) removes the associated address from the virtual router. The use of other values is implementation-dependent.
etsysVrrpExtConformance	1.3.6.1.4.1.5624.1.2.64.2
etsysVrrpExtMIBCompliances	1.3.6.1.4.1.5624.1.2.64.2.1
etsysVrrpExtMIBCompliance	1.3.6.1.4.1.5624.1.2.64.2.1.1			The core compliance statement for all VRRP Extensions implementations.
etsysVrrpExtMIBGroups	1.3.6.1.4.1.5624.1.2.64.2.2
etsysVrrpExtMIBGroup	1.3.6.1.4.1.5624.1.2.64.2.2.1			Conformance group for VRRP Extensions operations.

RFC description

Extends standard VRRP MIB with additional configuration and management objects for Enterasys routers.

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