ELTEX-MES-FLEX-LINKS-MIB

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Organization: Eltex Ltd.

Last Updated: 2015-11-19

Category: Vendor: Eltex

Description: Eltex MES Flex Links MIB for managing active/backup port pair failover on MES switches as a lightweight STP alternative.

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What Is ELTEX-MES-FLEX-LINKS-MIB?

ELTEX-MES-FLEX-LINKS-MIB is a private Eltex MIB for the Flex Links feature on MES-series switches, providing an active/backup Layer-2 interface pair failover mechanism as a lightweight alternative to running full Spanning Tree Protocol. Its data covers per-pair configuration (which interface is primary and which is backup), preemption mode/delay settings, and the operational status of each flex-link pair, plus a status-change notification. It directly supports link/interface health monitoring: eltFlIfStatusTable reveals which member of a flex-link pair, primary or backup, is currently forwarding traffic, letting an operator detect that a failover has occurred because the primary uplink failed, while the status-change notification alerts to such a switchover in real time. It functions as an alternative to standard Spanning Tree Protocol (IEEE 802.1D/802.1w) and complements the standard IF-MIB for the underlying interface indices. It is deployed on Eltex MES access/aggregation switches in service-provider or enterprise networks that need fast, simple link redundancy without running full STP, typically after an ELTEX-MES-FLEX-LINKS-MIB download to load the module into a MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ELTEX-MES-FLEX-LINKS-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

Eltex MES-series Ethernet switches

Monitoring Examples

An operator polls eltFlIfConfigTable/eltFlIfConfigEntry (eltFlIfConfigPrimary, eltFlIfConfigBackUp) to confirm which interfaces form a flex-link pair, then checks eltFlIfStatusTable/eltFlIfStatusEntry (indexed by eltFlIfIndex) to see which interface is currently forwarding traffic, detecting an unexpected failover to the backup link that would indicate a fault on the primary uplink. eltFlIfConfigExtTable's eltFlIfConfigPreemptionMode and eltFlIfConfigPreemptionDelay would be checked to confirm whether the primary link automatically reclaims active status after recovering, and after how long.

What Can Be Monitored

flex-link primary/backup interface configuration
active/backup interface status
preemption mode and delay
flex-link status-change notifications

Imported Objects

From ELTEX-MES

eltMesMng

OBJECT-IDENTITY

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
eltMesFlexLinksMIB	1.3.6.1.4.1.35265.1.23.1.5			This MIB module is for configuration and status query of Flex Links feature on the Eltex device. Flex Links are a pair of Layer 2 interfaces, where one interface is configured to act as a backup to the other. The feature provides an alternative solution to the Spanning Tree Protocol (STP), allowing users to turn off STP and still provide basic link redundancy. Flex Links are typically configured in service provider or enterprise networks where users do not want to run STP on the device.
eltMesFlexLinksMIBNotifs	1.3.6.1.4.1.35265.1.23.1.5.0
NTF eltFlIfStatusChangeNotif	1.3.6.1.4.1.35265.1.23.1.5.0.1			A eltFlIfStatusChangeNotif is generated when the value of eltFlIfStatus changes.
eltMesFlexLinksMIBObjects	1.3.6.1.4.1.35265.1.23.1.5.1
eltMesFlConfig	1.3.6.1.4.1.35265.1.23.1.5.1.1
eltFlIfConfigTable	1.3.6.1.4.1.35265.1.23.1.5.1.1.1		not-accessible	This table allows user to configure Flex Links. The Flex Links feature requires interface pairs to be setup. This table allows user to specify such interface pairs. An interface can become part of only one such interface pair at any given time.
eltFlIfConfigEntry	1.3.6.1.4.1.35265.1.23.1.5.1.1.1.1		not-accessible	An entry containing information about Flex Links configuration. Each entry configures a pair of interfaces for a Flex Links. Only those Layer 2 interfaces which are capable of performing Flex Links operation may be configured in this table. Once an interface is configured as part of a Flex Links pair, such an interface, can not be configured as a part of other Flex Links pairs.
NUM eltFlIfConfigPrimary	1.3.6.1.4.1.35265.1.23.1.5.1.1.1.1.1	InterfaceIndex	not-accessible	The object indicates the primary interface in this Flex Links pair.
NUM eltFlIfConfigBackUp	1.3.6.1.4.1.35265.1.23.1.5.1.1.1.1.2	InterfaceIndexOrZero	read-create	The object indicates the back up interface in this Flex Links pair. The value of this object is changed to 0 (zero) if this interface is removed from the ifTable. The SNMP agent is responsible for updating this object's value once the interface is added to the ifTable. The value of 0 (zero) cannot be set.
T/F eltFlEnableStatusChangeNotif	1.3.6.1.4.1.35265.1.23.1.5.1.1.2	TruthValue	read-write	This variable indicates whether the system produces the eltFlIfStatusChangeNotif. A value of 'false' will prevent eltFlIfStatusChangeNotif.
eltFlIfConfigExtTable	1.3.6.1.4.1.35265.1.23.1.5.1.1.3		not-accessible	This table contains management information, such as of MAC address-table Move Update(MMU), preemption mechanism, VLAN load balancing of Flex Links pair, of interfaces which are capable of supporting these features.
eltFlIfConfigExtEntry	1.3.6.1.4.1.35265.1.23.1.5.1.1.3.1		not-accessible	An entry containing Flex Links management information for a particular interface.
INT eltFlIfConfigPreemptionMode	1.3.6.1.4.1.35265.1.23.1.5.1.1.3.1.1	INTEGER	read-write	The object specifies the preemption mechanism for a Flex Link interface pair. off - No preemption happens from active interface to backup interface. forced - The active interface always preempts the backup interface. The preemption occurs after the time specified in eltFlIfConfigPreemptionDelay. bandwidth - The interface with higher bandwidth always acts as the active interface.
U32 eltFlIfConfigPreemptionDelay	1.3.6.1.4.1.35265.1.23.1.5.1.1.3.1.2	Unsigned32	read-write	The object specifies the delay time until an interface preempts another interface for a Flex Link interface pair.
eltMesFlStatus	1.3.6.1.4.1.35265.1.23.1.5.1.2
eltFlIfStatusTable	1.3.6.1.4.1.35265.1.23.1.5.1.2.1		not-accessible	A list of interfaces which are members of Flex Links.
eltFlIfStatusEntry	1.3.6.1.4.1.35265.1.23.1.5.1.2.1.1		not-accessible	An entry, containing status information about a Flex Links interface. Entry is created when an interface is configured as a member of a Flex Links. When an entry is created in the eltFlIfConfigTable, entries corresponding to eltFlIfConfigPrimary and eltFlIfConfigBackUp are created in this table. Entry is deleted when an interface is removed from a Flex Links. When an entry is removed from the eltFlIfConfigTable, entries corresponding to eltFlIfConfigPrimary and eltFlIfConfigBackUp are deleted from this table.
NUM eltFlIfIndex	1.3.6.1.4.1.35265.1.23.1.5.1.2.1.1.1	InterfaceIndex	read-only	The index value which uniquely identifies the interface to which this entry is applicable. eltFlIfIndex is the same as the ifIndex of the interface associated with a Flex Links.
INT eltFlIfStatus	1.3.6.1.4.1.35265.1.23.1.5.1.2.1.1.2	INTEGER	read-only	The status of an interface which is participating in Flex Links operation. A value of 'forwarding' indicates that, the interface is participating in Flex Links operation and is actively forwarding traffic. A value of 'blocking' indicates that, interface is participating in Flex Links operation and is ready to forward traffic if the interface it backs up in Flex Links operation goes down. A value of 'down' indicates that, the interface participating in Flex Links operation has gone down. A value of 'unknown' indicates that, the interface is participating Flex Links operation and has entered an unknown state.
eltMesFlexLinksMIBConformance	1.3.6.1.4.1.35265.1.23.1.5.2
eltMesFlexLinksMIBCompliances	1.3.6.1.4.1.35265.1.23.1.5.2.1
eltFlexLinksMIBCompliance	1.3.6.1.4.1.35265.1.23.1.5.2.1.1			The compliance statement for entities which implement the ELTEX-FLEX-LINKS-MIB.
eltMesFlexLinksMIBGroups	1.3.6.1.4.1.35265.1.23.1.5.2.2
eltFlexLinksIfConfigGroup	1.3.6.1.4.1.35265.1.23.1.5.2.2.1			A collection of objects providing interface configuration information for Flex Links.
eltFlexLinksIfStatusGroup	1.3.6.1.4.1.35265.1.23.1.5.2.2.2			A collection of objects providing interface status information for Flex Links.
eltFlexLinksEnableNotifGroup	1.3.6.1.4.1.35265.1.23.1.5.2.2.3			A collection of objects providing enabling/disabling of the status change notifications for Flex Links.
eltFlexLinksNotifGroup	1.3.6.1.4.1.35265.1.23.1.5.2.2.4			A collection of notifications providing the status change for Flex Links.
eltFlexLinksPreemptionGroup	1.3.6.1.4.1.35265.1.23.1.5.2.2.5			A collection of objects providing interface preemption information of Flex Links.

RFC description

Configures Flex Links feature on Eltex devices for layer 2 link redundancy as alternative to spanning tree.

Start monitoring Eltex MES-series Ethernet switch (Flex Links redundancy) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download ELTEX-MES-FLEX-LINKS-MIB

What Is ELTEX-MES-FLEX-LINKS-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description