Unisphere-Data-SLEP-MIB

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Organization: Unisphere Networks, Inc.

Last Updated: 2001-04-03

Category: Juniper/Unisphere Broadband

Description: Manages SLEP serial-line encapsulation interface parameters on Unisphere ERX routers.

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What Is Unisphere-Data-SLEP-MIB?

This is the enterprise Serial Line Encapsulation Protocol (SLEP) MIB for Unisphere Networks' ERX Edge Router Switch line, covering serial-line WAN interfaces that use SLEP encapsulation. It exposes per-interface configuration such as keepalive timer settings and loop-detection behavior, plus a statistics table tracking keepalive failures. Its monitoring value centers on link/software health: usdSlepKeepAliveTimer and usdSlepKeepAliveFailures let an operator detect a serial link that is flapping or has gone silent, and usdSlepDownWhenLooped flags a detected physical loopback condition on the line. It relies on the standard ifIndex interface model, layering each SLEP interface over a lower physical interface via usdSlepIfLowerIfIndex. It is deployed on ERX routers using legacy serial WAN links (e.g., leased lines) where encapsulation-level keepalive monitoring is needed to detect link failures. Engineers can download the Unisphere-Data-SLEP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in Unisphere-Data-SLEP-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

Juniper/Unisphere ERX Edge Router
serial WAN interface module

Monitoring Examples

An operator would poll usdSlepIfStatisticsTable/usdSlepIfStatisticsEntry keyed by usdSlepIfStatsIndex, watching usdSlepKeepAliveFailures climb as an indicator that a serial link is unreliable or down. Checking usdSlepIfRowStatus and usdSlepDownWhenLooped on the corresponding usdSlepIfTable/usdSlepIfEntry would confirm whether a link outage is due to an administrative state change or a detected physical loop. Adjusting usdSlepKeepAliveTimer and re-polling failure counts helps tune keepalive sensitivity on marginal serial circuits.

What Can Be Monitored

keepalive timer setting
keepalive failure count
loop-detected status
interface row status
lower interface layering

Imported Objects

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus

From Unisphere-Data-MIBs

usDataMibs

MODULE-IDENTITY

From Unisphere-Data-TC

UsdEnable
UsdNextIfIndex

How to Use in IPNetwork Monitor

Example using usdSlepKeepAliveFailures OID:

Select a Juniper/Unisphere ERX Edge Router, serial WAN interface module (keepalive/loopback-detection status) 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 usdSlepKeepAliveFailures 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 number of link drops due to keep-alive failures. 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
usdSlepMIBS	1.3.6.1.4.1.4874.2.2.15			The Serial Line Encapulation Protocol (SLEP) MIB for the Unisphere Networks Inc. enterprise.
usdSlepObjects	1.3.6.1.4.1.4874.2.2.15.1
usdSlepIfLayer	1.3.6.1.4.1.4874.2.2.15.1.1
USD usdSlepNextIfIndex	1.3.6.1.4.1.4874.2.2.15.1.1.1	UsdNextIfIndex	read-only	Coordinate ifIndex value allocation for entries in usdSlepIfTable. A GET of this object returns the next available ifIndex value to be used to create an entry in the associated interface table; or zero, if no valid ifIndex value is available. This object also returns a value of zero when it is the lexicographic successor of a varbind presented in an SNMP GETNEXT or GETBULK request, for which circumstance it is assumed that ifIndex allocation is unintended. Successive GETs will typically return different values, thus avoiding collisions among cooperating management clients seeking to create table entries simultaneously.
usdSlepIfTable	1.3.6.1.4.1.4874.2.2.15.1.1.2		not-accessible	The parameters for the SLEP service on this interface.
usdSlepIfEntry	1.3.6.1.4.1.4874.2.2.15.1.1.2.1		not-accessible	The Parameters for a particular SLEP interface. Creating/deleting entries in this table causes corresponding entries for be created/deleted in ifTable/ifXTable/usdIfTable
NUM usdSlepIfIndex	1.3.6.1.4.1.4874.2.2.15.1.1.2.1.1	InterfaceIndex	not-accessible	The ifIndex value of the corresponding ifEntry.
INT usdSlepKeepAliveTimer	1.3.6.1.4.1.4874.2.2.15.1.1.2.1.2	INTEGER	read-create	The interface keep alive timer for this entry. The time in seconds that this entity will wait for sending a keep-alive-message to the remote SLEP entity, and the time in seconds that this entity will wait for the reception of a keep-alive-message from the remote SLEP entity.
NUM usdSlepIfLowerIfIndex	1.3.6.1.4.1.4874.2.2.15.1.1.2.1.3	InterfaceIndexOrZero	read-create	The ifIndex of an interface over which this SLEP interface is to be layered. A value of zero indicates no layering. An implementation may choose to require that a nonzero value be configured at entry creation.
ROW usdSlepIfRowStatus	1.3.6.1.4.1.4874.2.2.15.1.1.2.1.4	RowStatus	read-create	Controls creation/deletion of entries in this table according to the RowStatus textual convention, constrained to support the following values only: createAndGo destroy To create an entry in this table, the following entry objects MUST be explicitly configured: usdSlepIfRowStatus usdSlepIfLowerIfIndex In addition, when creating an entry the following conditions must hold: A value for usdSlepIfIndex must have been determined previously, by reading usdSlepNextIfIndex. The interface identified by usdSlepIfLowerIfIndex must exist, and must be an interface type that permits layering of SLEP Interface above it. A corresponding entry in ifTable/ifXTable/usdIfTable is created/destroyed as a result of creating/destroying an entry in this table.
USD usdSlepDownWhenLooped	1.3.6.1.4.1.4874.2.2.15.1.1.2.1.5	UsdEnable	read-create	The down-when-looped control for this entry. This attribute determines if loop detection is enabled for the interface. If set to disable, loop detection is disabled for the interface.
usdSlepIfStatisticsTable	1.3.6.1.4.1.4874.2.2.15.1.1.3		not-accessible	The statistics for the SLEP service on this interface.
usdSlepIfStatisticsEntry	1.3.6.1.4.1.4874.2.2.15.1.1.3.1		not-accessible	The statistics for a particular SLEP interface.
NUM usdSlepIfStatsIndex	1.3.6.1.4.1.4874.2.2.15.1.1.3.1.1	InterfaceIndex	not-accessible	The ifIndex value of that identifies this entry.
C32 usdSlepKeepAliveFailuresEx	1.3.6.1.4.1.4874.2.2.15.1.1.3.1.2	Counter32	read-only	The number of link drops due to keep-alive failures.
C32 usdSlepLinkStatusTooLongPackets	1.3.6.1.4.1.4874.2.2.15.1.1.3.1.3	Counter32	read-only	The number of packets that were too long for this SLEP entity.
C32 usdSlepLinkStatusBadFCSs	1.3.6.1.4.1.4874.2.2.15.1.1.3.1.4	Counter32	read-only	The number of FCS's errors for this SLEP entity.
usdSlepConformance	1.3.6.1.4.1.4874.2.2.15.4
usdSlepCompliances	1.3.6.1.4.1.4874.2.2.15.4.1
usdSlepCompliance	1.3.6.1.4.1.4874.2.2.15.4.1.1			Obsolete compliance statement for entities which implement the Unisphere SLEP MIB. This compliance statement became obsolete when the usdSlepDownWhenLooped object was added.
usdSlepCompliance2	1.3.6.1.4.1.4874.2.2.15.4.1.2			The compliance statement for entities which implement the Unisphere SLEP MIB.
usdSlepGroups	1.3.6.1.4.1.4874.2.2.15.4.2
usdSlepGroup	1.3.6.1.4.1.4874.2.2.15.4.2.1			Obsolete collection of objects providing management of SLEP interfaces in a Unisphere product. This group became obsolete when the usdSlepDownWhenLooped object was added.
usdSlepGroup2	1.3.6.1.4.1.4874.2.2.15.4.2.2			A collection of objects providing management of SLEP interfaces in a Unisphere product.

RFC description

Unisphere-Data SLEP (System Level Event Processing) MIB provides system-level event and trap management for Juniper Unisphere routing platforms.

Start monitoring Juniper/Unisphere ERX Edge Router, serial WAN interface module (keepalive/loopback-detection status) 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.

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