CISCO-WAN-SONET-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsCISCO-WAN-SONET-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2002-05-20

Category: Optical and WDM, Vendor: Cisco Devices

Description: Manages Cisco WAN SONET interface configuration and alarm status on MGX optical trunk modules.

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What Is CISCO-WAN-SONET-MIB?

CISCO-WAN-SONET-MIB extends the standard SONET/SDH MIB (RFC 2558) with Cisco-specific objects for SONET/SDH trunk interfaces on Cisco WAN MGX optical switching/multiplexing platforms. It defines section-layer alarm tables holding statistical alarm severity settings and configurable thresholds for Errored Seconds (ES), Severely Errored Seconds (SES), Severely Errored Framing Seconds (SEFS), and Coding Violations (CV), along with a current alarm status object per section. Its primary purpose is fault and performance monitoring of the physical SONET/SDH transport layer - detecting degraded optical line quality via error-second/violation thresholds and surfacing active alarm conditions, effectively a hardware transmission-health feed. It explicitly extends the IETF standard SONET-MIB (RFC 2558), layering Cisco-specific alarm/threshold semantics on top. It is typically deployed on Cisco MGX-series WAN switches carrying SONET/SDH optical trunks in carrier and enterprise WAN backbone environments, all monitored through the CISCO-WAN-SONET-MIB MIB's alarm and threshold objects.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-WAN-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 WAN MGX-series SONET/SDH optical switch/multiplexer

Monitoring Examples

An operator polling cwsSectionStatAlarmStatus can see whether a SONET section is currently in an alarm state, while cwsSectionCurrentSESsThreshold and cwsSectionTotalSESsThreshold reveal how close the current Severely Errored Seconds count is to the configured alarm threshold, warning of degrading line quality before a hard failure. cwsSectionCurrentCVsThreshold tracks Coding Violations, a leading indicator of optical signal degradation. The cwsSectionAlarmTable, together with cwsSectionStatisticalAlarmSeverity, lets an NMS prioritize which SONET section alarms need immediate attention.

What Can Be Monitored

  • SONET section alarm status
  • errored seconds (ES) threshold
  • severely errored seconds (SES) threshold
  • severely errored framing seconds (SEFS) threshold
  • coding violations (CV) threshold
Imported Objects

From CISCOWAN-SMI

ciscoWanOBJECT-IDENTITY

From IF-MIB

ifIndexOBJECT-TYPE

From PerfHist-TC-MIB

PerfIntervalCount

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32
OIDs

RFC description

Manages SONET/SDH interface objects and performance metrics for Cisco WAN equipment.

Start monitoring Cisco WAN MGX-series SONET/SDH optical switch/multiplexer (legacy) 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-WAN-SONET-MIB