SL-ENTITY-MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › SL-ENTITY-MIB

Organization: Smartoptics

Last Updated: 2000-08-28

Description: MIB for physical entity inventory — cards, power supplies, fans, and shelf — on Smartoptics SiteLight optical network elements, based on RFC 2737

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock 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.

What Is SL-ENTITY-MIB?

SL-ENTITY-MIB is Smartoptics' SiteLight optical network element implementation of the standard RFC 2737 Entity MIB, providing a physical-entity inventory of chassis, cards, power supplies, and other hardware components. It belongs to the optical networking/transport technology area. It exposes physical hardware inventory data — entity descriptions, class (chassis, card, port, power supply, fan, etc.), hardware/firmware/software revision levels, serial numbers, and protection-switching state. SL-ENTITY-MIB SNMP monitoring is directly aimed at hardware and software status tracking: firmware/software revision tracking for each entity, serial-number-based asset identification, and protection-entity/protect-state/protect-mode fields that reveal whether redundancy protection for a given card or port is active, standby, or failed. It explicitly depends on and is modeled after the standard RFC 2737 ENTITY-MIB, adapting its structure to SiteLight's own OID namespace. It is deployed in optical transport/DWDM networks running Smartoptics SiteLight network elements.

IPNetwork Monitor allows you to monitor SNMP objects defined in SL-ENTITY-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

  • Smartoptics SiteLight optical network elements

Monitoring Examples

An operator would poll slEntPhysicalTable/slEntPhysicalEntry, keyed by slEntPhysicalIndex, to enumerate installed hardware components and read slEntPhysicalDescr and slEntPhysicalClass to identify each entity's type. Checking slEntPhysicalFirmwareRev and slEntPhysicalSoftwareRev across entities would reveal a card running an outdated firmware version needing an upgrade. Monitoring slEntPhysicalProtectState and slEntPhysicalProtectMode on slEntPhysicalProtectionEntity-linked entries would show whether a protected optical card has failed over to its backup, indicating a hardware fault requiring attention.

What Can Be Monitored

  • physical entity inventory
  • hardware/firmware/software revision
  • serial number
  • protection entity failover state
  • protection mode
Imported Objects

From IF-MIB

InterfaceIndex

From SL-MAIN-MIB

slMainMODULE-IDENTITY

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
TimeTicks
mib-2

From SNMPv2-TC

AutonomousType
DisplayString
PhysAddress
RowStatus
TAddress
TDomain
TEXTUAL-CONVENTION
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using slEntPhysicalStatus OID:

Select a Smartoptics SiteLight optical network element 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 slEntPhysicalStatus 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. It reports a bitmap of hardware/software status flags for this physical entity — for example, bit values indicating the card is removed, a communication fault, a major alarm, or a software failure. 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 anything other than 0, since any non-zero bit indicates one of the listed fault conditions is currently active. Click Finish to create the monitor; you can adjust any parameter later.

See also: slEntPhysicalSysUptime

OIDs

RFC description

Manages physical and logical entity information for SL (Extreme SLX-OS) networking devices.

Start monitoring Smartoptics SiteLight optical network elements (physical entity/firmware/protection-state inventory) 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 SL-ENTITY-MIB