CISCO-SONET-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsCISCO-SONET-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2003-03-07

Category: Cisco Devices, Network Interfaces

Description: Provides comprehensive SONET/SDH interface management including path, section, and line layer performance monitoring.

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What Is CISCO-SONET-MIB?

CISCO-SONET-MIB is Cisco's extension to the standard SONET/SDH interface MIB (RFC 2558), providing comprehensive management of SONET/SDH transport interfaces across section, line, and path layers plus VT (virtual tributary) mapping. It exposes configuration objects for loopback type, transmit clock source, frame scrambling, RDI (Remote Defect Indication) type, and tributary mapping/type settings for VT-level circuits. Its monitoring role centers on transport-layer hardware status: tracking csConfigRDIVType/csConfigRDIPType and related defect indication settings helps an operator detect signal degradation or line/path defects on SONET/SDH circuits, which is critical for carrier-grade optical transport reliability. It explicitly extends RFC 2558 (the standard SONET MIB), depending on that IETF standard for its base interface model while adding Cisco-specific configuration granularity. It is deployed on Cisco SONET/SDH-capable routers and transport platforms in carrier and enterprise WAN backbones. Engineers researching Cisco SONET/SDH interface monitoring reference this MIB, which extends the standard SONET MIB (RFC 2558) with Cisco-specific detail.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-SONET-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

  • Cisco SONET/SDH transport routers

Monitoring Examples

An operator would poll csConfigTable/csConfigEntry to check csConfigLoopbackType (confirming no port is stuck in a diagnostic loopback state affecting live traffic) and csConfigXmtClockSource to verify the interface is deriving timing from the correct source. csVTConfigTable/csVTConfigEntry with csTributaryType and csTributaryMappingType would be checked when a VT-level circuit shows errors, to confirm the tributary mapping matches the far-end configuration.

What Can Be Monitored

  • loopback configuration state
  • transmit clock source
  • frame scrambling setting
  • RDI defect indication type
  • VT tributary mapping and type
Imported Objects

From CISCO-SMI

ciscoMgmtOBJECT-IDENTITY

From IF-MIB

InterfaceIndex
ifDescrOBJECT-TYPE
ifIndexOBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue

From SONET-MIB

sonetLineCurrentStatusOBJECT-TYPE
sonetPathCurrentEntryOBJECT-TYPE
sonetPathCurrentStatusOBJECT-TYPE
sonetSectionCurrentStatusOBJECT-TYPE
sonetVTCurrentStatusOBJECT-TYPE

How to Use in IPNetwork Monitor

Example using cssLOSs OID:

Select a Cisco SONET/SDH transport router 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 cssLOSs 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 Loss of signals(LOS) encountered by a SONET/SDH Section. 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 loss of signals), 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

RFC description

Extends SONET/SDH interface management with payload configuration, tributary mapping, and status notifications.

Start monitoring Cisco SONET/SDH transport routers 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 CISCO-SONET-MIB