CISCO-FCS-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsCISCO-FCS-MIB

Organization: Cisco Systems Inc.

Last Updated: 2004-02-19

Category: Cisco Devices, Fibre Channel and Storage

Description: Provides management objects for the Fibre Channel Fabric Configuration Server (FCS) that distributes fabric topology information across a SAN.

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What Is CISCO-FCS-MIB?

CISCO-FCS-MIB is a Cisco Systems proprietary MIB managing the Fabric Configuration Server (FCS), a Fibre Channel fabric-services component defined by the FC-GS3 standard that discovers and tracks every interconnect element (switch) in a VSAN. Its objects cover a per-VSAN discovery spin-lock and name, cached discovery result lists (in both 2K and 4K response-size formats), a discovery-trigger action, discovery status and completion time, a discovery timeout, cache-invalidation triggers, and an interconnect-element (IE) table recording each element's name, type, domain ID, management ID, and fabric name. As a configuration/status MIB it lets a SAN administrator trigger fabric discovery and confirm it completed successfully before trusting the topology it reports. It is deployed on Cisco MDS/Nexus Fibre Channel SAN switches. SAN engineers researching cisco fcs behavior use this MIB to confirm Fabric Configuration Server discovery has completed before trusting the VSAN topology it reports.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-FCS-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 MDS/Nexus Fibre Channel SAN switches

Monitoring Examples

A SAN administrator checks fcsDiscoveryStatus and fcsDiscoveryCompleteTime after triggering fcsStartDiscovery to confirm fabric discovery finished successfully before relying on the reported VSAN topology.

What Can Be Monitored

  • fabric discovery status and completion
  • interconnect-element (switch) inventory
Imported Objects

From CISCO-NS-MIB

FcGs3RejectReasonCode

From CISCO-SMI

ciscoMgmtOBJECT-IDENTITY

From CISCO-ST-TC

DomainIdOrZero
FcAddressId
FcNameId
FcPortModuleTypes
FcPortTxTypes
FcPortTypes
VsanIndex

From CISCO-TC

ListIndex
ListIndexOrZero
TimeIntervalSec

From CISCO-VSAN-MIB

vsanIndexOBJECT-TYPE

From CISCO-ZS-MIB

FcList

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

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

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION
TestAndIncr
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using fcsTotalRejects OID:

Select a Cisco MDS/Nexus Fibre Channel SAN switch 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 fcsTotalRejects into the Find box to locate it in the OID tree, then select it and click OK. The total number of requests rejected by the local switch across all VSANs. 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

RFC description

Fabric Configuration Server management for Fibre Channel networks including platform configuration, naming, and VSAN support.

Start monitoring Cisco MDS/Nexus Fibre Channel SAN switches 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-FCS-MIB