ELTEX-L2-TUNNEL-CONFIG-MIB

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Organization: Eltex Enterprise Co, Ltd.

Last Updated: 2015-09-08

Category: Technology: Link Aggregation, Vendor: Eltex

Description: Eltex layer-2 tunnel configuration MIB for managing L2 tunneling protocols and encapsulation on Eltex switch platforms.

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What Is ELTEX-L2-TUNNEL-CONFIG-MIB?

ELTEX-L2-TUNNEL-CONFIG-MIB is a vendor-specific MIB from Eltex Enterprise for configuring and monitoring Layer 2 protocol tunneling (L2PT), the mechanism that lets a service provider transparently tunnel customer Layer 2 control protocols across a provider network so two customer sites appear as one VLAN. It exposes tables defining which protocols are tunneled, per-protocol CoS marking, drop/shutdown thresholds for tunneled traffic, and a statistics table tracking tunneled traffic. Its monitoring value centers on software/traffic-configuration status: eltexLtcTunnelThresholdTable's eltexLtcTunnelDropThreshold and eltexLtcTunnelShutdownThreshold reveal whether tunneled protocol traffic is approaching a rate that will trigger drops or an automatic port shutdown, a common protection against control-plane floods, while eltexLtcTunnelStatisticsTable exposes counters for actual tunneled traffic volume. It is a self-contained Eltex-specific mechanism analogous to but independent of Cisco's L2PT feature and MIB. It is deployed on Eltex switches at service-provider network edges connecting geographically separate customer LAN segments. Engineers can download the ELTEX-L2-TUNNEL-CONFIG-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ELTEX-L2-TUNNEL-CONFIG-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 Enterprise switches (service provider edge)

Monitoring Examples

An operator checks eltexLtcTunneledProtocolTable/eltexLtcTunneledProtocolEntry to confirm which protocols, by eltexLtcTunneledProtocolType, are being tunneled on a given port, then monitors eltexLtcTunnelStatisticsTable counters for a spike in tunneled frames. eltexLtcTunnelThresholdTable (indexed by eltexLtcTunnelThresholdProtocolIndex) is watched so that eltexLtcTunnelDropThreshold and eltexLtcTunnelShutdownThreshold are not breached, since crossing the shutdown threshold would automatically disable the tunneling port and disrupt the customer's transparent LAN service. eltexLtcTunnelMacAddress confirms the destination MAC used for tunnel encapsulation matches the configured value.

What Can Be Monitored

tunneled protocol types per port
tunneled traffic statistics/volume
tunnel drop threshold status
tunnel shutdown threshold status
tunnel encapsulation MAC address
CoS marking for tunneled traffic

Imported Objects

From CISCO-QOS-PIB-MIB

QosLayer2Cos

From ELTEX-SMI-ACTUAL

eltexLtd

MODULE-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

MacAddress
TruthValue

How to Use in IPNetwork Monitor

Example using eltexLtcTunnelEncapStats OID:

Select an Eltex Enterprise switch, service-provider edge (Layer 2 protocol tunneling) 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 eltexLtcTunnelEncapStats 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 tunneled PDU encapsulation statistics of an interface. 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 sharply between polls relative to its normal baseline (in encapsulated PDUs), since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
eltexL2TunnelConfig	1.3.6.1.4.1.35265.37			This MIB module is for layer 2 tunneling related configurations on a device. Tunneling allows separate local networks to be considered as a single VLAN. These separate networks are connected via an ISP, which will tunnel the packets from one network to another, making it appear as if the two networks are actually just one.
eltexLtcMIBObjects	1.3.6.1.4.1.35265.37.1
eltexLtcGlobal	1.3.6.1.4.1.35265.37.1.1
T/F eltexLtcNotificationEnable	1.3.6.1.4.1.35265.37.1.1.1	TruthValue	read-write	This object indicates whether the system will generate the eltexLtcTunnelDropThresholdExceeded and eltexLtcTunnelShutdownThresholdExceeded notifications.
MAC eltexLtcTunnelMacAddress	1.3.6.1.4.1.35265.37.1.1.2	MacAddress	read-write	The destination MAC address that replaces the original destination MAC address of tunneled frames.
eltexLtcTunneledProtocol	1.3.6.1.4.1.35265.37.1.2
eltexLtcTunneledProtocolTable	1.3.6.1.4.1.35265.37.1.2.1		not-accessible	This table contains information about the protocols being tunneled. Only tunneled protocol filtering capable interfaces are shown.
eltexLtcTunneledProtocolEntry	1.3.6.1.4.1.35265.37.1.2.1.1		not-accessible	Information about the protocols being tunneled. Only tunneled protocol filtering capable interfaces are shown.
BIT eltexLtcTunneledProtocolType	1.3.6.1.4.1.35265.37.1.2.1.1.1	Bits	read-write	Indicates tunneled protocol of the interface. If a BIT is set, then the value of the corresponding protocol is tunneled. Specifically, if the 'stp(0)' BIT is set, then the Spanning Tree Protocol PDU is tunneled. At this moment, there are no other supported protocols. If the bit for a given protocol is set for an interface, then the statistics for that interface and protocol will start to be monitored.
QOS eltexLtcTunnelCos	1.3.6.1.4.1.35265.37.1.2.1.1.2	QosLayer2Cos	read-write	Specifies the user priority of the tunneled PDUs for the interface.
eltexLtcTunnelThreshold	1.3.6.1.4.1.35265.37.1.3
eltexLtcTunnelThresholdTable	1.3.6.1.4.1.35265.37.1.3.1		not-accessible	This table contains information about the thresholds for protocol tunneling. Only tunneled protocol filtering capable interfaces are shown. The objects will be on a per interface, per protocol basis.
eltexLtcTunnelThresholdEntry	1.3.6.1.4.1.35265.37.1.3.1.1		not-accessible	Information about the thresholds for protocol tunneling. Only tunneled protocol filtering capable interfaces are shown. The entries will be on a per interface, per protocol basis
ELT eltexLtcTunnelThresholdProtocolIndex	1.3.6.1.4.1.35265.37.1.3.1.1.1	EltexLtcTunneledProtocolIndex	not-accessible	A tunneled protocol of an interface.
U32 eltexLtcTunnelDropThreshold	1.3.6.1.4.1.35265.37.1.3.1.1.2	Unsigned32	read-write	The drop threshold on an interface for a given protocol. After reaching this drop threshold, the interface will start dropping PDUs for the given protocol. This value cannot be greater than the value of eltexLtcTunnelShutdownThreshold. A value of 0 indicates that no limit is set.
U32 eltexLtcTunnelShutdownThreshold	1.3.6.1.4.1.35265.37.1.3.1.1.3	Unsigned32	read-write	The shutdown threshold on an interface for a given protocol. After reaching the shutdown threshold, the interface will shutdown for the given protocol. This value cannot be less than the value of eltexLtcTunnelDropThreshold. A value of 0 indicates that no limit is set.
eltexLtcTunnelStatistics	1.3.6.1.4.1.35265.37.1.4
eltexLtcTunnelStatisticsTable	1.3.6.1.4.1.35265.37.1.4.1		not-accessible	This table contains protocol tunneling statistics on the interface.
eltexLtcTunnelStatisticsEntry	1.3.6.1.4.1.35265.37.1.4.1.1		not-accessible	Protocol tunneling statistics on the interface.
ELT eltexLtcTunneledProtocolIndex	1.3.6.1.4.1.35265.37.1.4.1.1.1	EltexLtcTunneledProtocolIndex	not-accessible	A tunneled protocol of an interface.
C32 eltexLtcTunnelEncapStatsEx	1.3.6.1.4.1.35265.37.1.4.1.1.2	Counter32	read-only	The tunneled PDU encapsulation statistics of an interface. These statistics cover the number of tunneled ingress PDUs.
C32 eltexLtcTunnelDecapStats	1.3.6.1.4.1.35265.37.1.4.1.1.3	Counter32	read-only	The tunneled PDU de-encapsulation statistics of an interface. These statistics cover the number of tunneled egress PDUs.
C32 eltexLtcTunnelDropStats	1.3.6.1.4.1.35265.37.1.4.1.1.4	Counter32	read-only	The number of PDUs dropped on an interface for a given protocol. The PDUs will be dropped when the eltexLtcTunnelDropThreshold is reached.
eltexLtcMIBNotifications	1.3.6.1.4.1.35265.37.2
eltexLtcMIBNotificationsPrefix	1.3.6.1.4.1.35265.37.2.0
NTF eltexLtcTunnelDropThresholdExceeded	1.3.6.1.4.1.35265.37.2.0.1			This notification is generated when the eltexLtcTunnelDropThreshold has been exceeded.
NTF eltexLtcTunnelShutdownThresholdExceeded	1.3.6.1.4.1.35265.37.2.0.2			This notification is generated when the eltexLtcTunnelShutdownThreshold has been exceeded.

RFC description

Configures layer 2 tunneling on Eltex devices to connect separate networks as single VLANs via ISP tunnels.

Start monitoring Eltex Enterprise switch, service-provider edge (Layer 2 protocol tunneling) 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-L2-TUNNEL-CONFIG-MIB