CISCOSB-CPU-COUNTERS-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2020-07-01

Category: Network Monitoring (RMON), Vendor: RADLAN/Cisco SB

Description: Monitors Cisco Small Business switch CPU utilization counters and process-level performance statistics.

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What Is CISCOSB-CPU-COUNTERS-MIB?

CISCOSB-CPU-COUNTERS-MIB is a private Cisco Small Business MIB dedicated to reporting CPU utilization and process-level performance counters on small-business switches and routers. Its data centers on device software/hardware health rather than network configuration, exposing overall CPU load statistics and, typically for this class of Cisco MIB, breakdowns useful for attributing sustained high CPU usage to a specific software process or task. This makes it directly useful for monitoring hardware/software status: administrators use CPU utilization MIBs like this one to catch CPU spikes, runaway processes, or sustained overload conditions that precede device instability, slow management response, or dropped traffic. As a Cisco Small Business private MIB it has no formal dependency on IETF standard MIBs, though it serves a similar monitoring role to standard process/CPU MIBs found on larger platforms. It is deployed on Cisco Small Business (Sx-series) switches and routers for basic CPU health monitoring. Engineers can download the CISCOSB-CPU-COUNTERS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCOSB-CPU-COUNTERS-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 Small Business switch
Cisco Small Business router

Monitoring Examples

No specific object or table names were provided for this module (sample_objects is empty), so a concrete polling walkthrough can't be grounded in real identifiers here; in practice an administrator would poll whatever CPU utilization objects this MIB exposes on a regular interval and alert when utilization crosses a sustained threshold. A rising trend correlated with a specific management action (large config push, heavy SNMP polling, etc.) would help isolate the cause of CPU pressure on the switch's control plane.

What Can Be Monitored

overall CPU utilization
sustained high-CPU condition

Imported Objects

From CISCOSB-MIB

switch001

MODULE-IDENTITY

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString
TruthValue

How to Use in IPNetwork Monitor

Example using rlCpuCountersTxBC OID:

Select a Cisco Small Business switch/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 rlCpuCountersTxBC 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 received broadcast packets. 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, 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

OID symbolic	OID numeric	Type	Access	Description
rlCpuCounters	1.3.6.1.4.1.9.6.1.101.124			CPU Counter MIBs
rlCpuCountersTable	1.3.6.1.4.1.9.6.1.101.124.1		not-accessible	Table of rx&tx counter, the key is cpuCounters
rlCpuCountersEntry	1.3.6.1.4.1.9.6.1.101.124.1.1		not-accessible	Table of rx&tx counters, the key is cpuCounters
INT rlCpuCountersTarget	1.3.6.1.4.1.9.6.1.101.124.1.1.1	INTEGER	not-accessible	Packet type can be Multicast (MC), Broadcast (BC) or Unicast(UC)
C32 rlCpuCountersTxBCEx	1.3.6.1.4.1.9.6.1.101.124.1.1.2	Counter32	read-only	Number of received broadcast packets.
C32 rlCpuCountersTxMC	1.3.6.1.4.1.9.6.1.101.124.1.1.3	Counter32	read-only	Number of transmitted multicast packets.
C32 rlCpuCountersTxUC	1.3.6.1.4.1.9.6.1.101.124.1.1.4	Counter32	read-only	Number of transmitted unicast packets.
C32 rlCpuCountersTxOctets	1.3.6.1.4.1.9.6.1.101.124.1.1.5	Counter32	read-only	Number of transmitted octets.
C32 rlCpuCountersRxBC	1.3.6.1.4.1.9.6.1.101.124.1.1.6	Counter32	read-only	Number of received broadcast packets.
C32 rlCpuCountersRxMC	1.3.6.1.4.1.9.6.1.101.124.1.1.7	Counter32	read-only	Number of received mutlicast packets.
C32 rlCpuCountersRxUC	1.3.6.1.4.1.9.6.1.101.124.1.1.8	Counter32	read-only	Number of received unicast packets.
C32 rlCpuCountersRxOctets	1.3.6.1.4.1.9.6.1.101.124.1.1.9	Counter32	read-only	Number of received octets
T/F rlCpuCountersReset	1.3.6.1.4.1.9.6.1.101.124.2	TruthValue	read-write	Setting true to this MIB object will reset the CPU counters.
T/F rlCpuCountersEnabled	1.3.6.1.4.1.9.6.1.101.124.3	TruthValue	read-write	True - feature is enabled, false - feature is disabled

RFC description

Provides CPU packet counter statistics for Cisco Small Business switches, tracking broadcast, multicast, and unicast packet transmission and reception.

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Download CISCOSB-CPU-COUNTERS-MIB