CISCO-IETF-ISIS-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsCISCO-IETF-ISIS-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2005-08-16

Category: Cisco Devices, Routing Protocols

Description: Manages IS-IS routing protocol instances, adjacencies, and link-state database entries on Cisco devices.

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 CISCO-IETF-ISIS-MIB?

CISCO-IETF-ISIS-MIB is Cisco's implementation of the IETF's draft IS-IS routing protocol MIB (based on draft-ietf-isis-wg-mib-16), used to manage and monitor IS-IS (ISO 10589) routing instances that construct IP routing tables per RFC 1195 on Cisco devices. It exposes objects for IS-IS system-level configuration and status covering routing instance parameters, adjacency state, and link-state database entries. Its monitoring role is centered on routing protocol software health: administrators poll IS-IS system and level objects to confirm the protocol is enabled and operating at the correct level (Level 1/Level 2), and to detect adjacency flaps or link-state database inconsistencies indicating routing instability or a failed neighbor relationship. It is explicitly dependent on, and modeled after, the IETF draft IS-IS MIB, layered with Cisco-specific conformance statements. It is deployed in service-provider and enterprise core/backbone networks running Cisco routers with IS-IS as the interior gateway protocol. Engineers can download the CISCO-IETF-ISIS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-IETF-ISIS-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 routers running IS-IS (service-provider/enterprise core)

Monitoring Examples

An operator would poll objects under ciiSystem/ciiSysLevel to confirm an IS-IS routing instance is active at the expected level and to inspect adjacency and link-state database status; a system where an expected Level 2 adjacency shows down, or where ciscoIetfIsisMIBNotifs generates an unexpected adjacency-change trap, would indicate a neighbor relationship failure or IGP instability on the backbone.

What Can Be Monitored

  • IS-IS routing instance status
  • IS-IS level (L1/L2) configuration
  • adjacency state
  • link-state database entries
  • IS-IS notifications/traps
Imported Objects

From CISCO-SMI

ciscoExperimentOBJECT-IDENTITY

From DIFFSERV-MIB

IndexIntegerNextFree

From IF-MIB

InterfaceIndex

From INET-ADDRESS-MIB

InetAddress
InetAddressPrefixLength
InetAddressType

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
TimeTicks
Unsigned32

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using ciiSysStatCorrLSPs OID:

Select a Cisco routers running IS-I (service-provider/enterprise core) 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 ciiSysStatCorrLSPs 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 the number of corrupted in-memory LSP frames detected. LSPs received from the wire with a bad checksum are silently dropped and not counted. 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

Cisco implementation of the IETF ISIS routing protocol MIB for managing Intermediate System to Intermediate System protocol.

Start monitoring Cisco routers running IS-IS (service-provider/enterprise core) 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-IETF-ISIS-MIB