CISCOSB-QUEUE-STATISTICS-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2016-07-07

Category: Quality of Service, Vendor: RADLAN/Cisco SB

Description: Monitors Cisco Small Business per-queue statistics including enqueue, dequeue, and drop counters.

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What Is CISCOSB-QUEUE-STATISTICS-MIB?

CISCOSB-QUEUE-STATISTICS-MIB is a private Cisco Small Business MIB that reports per-interface, per-queue QoS traffic statistics, covering transmitted and dropped packet/byte counters for each configured egress queue and drop-precedence level. It exposes performance/traffic counter data used to assess QoS queue behavior under load. Its core monitoring value is operational/performance status: tracking rlInterfaceQueueStatisticsTxPackets/TxBytes against rlInterfaceQueueStatisticsDroppedPackets/DroppedBytes per queue reveals congestion, tail-drop, or WRED behavior, and the rlInterfaceQueueStatisticsClear object lets an operator reset counters for a fresh measurement window. It depends on IF-MIB's ifIndex to identify the physical/logical interface each queue belongs to, layering QoS queue detail on top of standard interface identification. It is typically deployed on Cisco Small Business switches/routers where QoS queuing is configured to prioritize voice, video, or business-critical traffic. Engineers can download the CISCOSB-QUEUE-STATISTICS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCOSB-QUEUE-STATISTICS-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 (SB/SG series) switch/router

Monitoring Examples

An administrator would poll rlInterfaceQueueStatisticsTable/Entry for a given rlInterfaceQueueStatisticsIfIndex and rlInterfaceQueueStatisticsQueue, comparing rlInterfaceQueueStatisticsTxPackets to rlInterfaceQueueStatisticsDroppedPackets to compute a drop rate for that queue. A high and growing rlInterfaceQueueStatisticsDroppedBytes count on a voice priority queue would indicate the queue is oversubscribed and calls may be experiencing jitter or loss. Using rlInterfaceQueueStatisticsClear resets counters so a clean before/after comparison can be made around a configuration change.

What Can Be Monitored

per-queue transmitted packets/bytes
per-queue dropped packets/bytes
drop precedence (DP) level
queue index per interface
counter reset/clear state

Imported Objects

From CISCOSB-MIB

switch001

MODULE-IDENTITY

From CISCOSB-POLICY-MIB

StatisticsDPType

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From SNMPv2-SMI

Counter64
Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using rlInterfaceQueueStatisticsTxPackets OID:

Select a Cisco Small Business (SB/SG series) 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 rlInterfaceQueueStatisticsTxPackets 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 packets enqueued for transmission. 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 Counter64-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
rlQueueStatistics	1.3.6.1.4.1.9.6.1.101.233			This private MIB module for Queue-Statistics
NUM rlInterfaceQueueStatisticsClear	1.3.6.1.4.1.9.6.1.101.233.1	InterfaceIndexOrZero	read-write	This scalar indicates on which interface to clear queue statistics. A value of zero means to clear queue statistics on all interfaces.
rlInterfaceQueueStatisticsTable	1.3.6.1.4.1.9.6.1.101.233.2		not-accessible	This table specifies packets/bytes pass/drop counters per Port/Queue/Drop Precedence
rlInterfaceQueueStatisticsEntry	1.3.6.1.4.1.9.6.1.101.233.2.1		not-accessible	Each entry in this table describes packets/bytes pass/drop counters for a given combination of port/Queue/Drop Precedence.
NUM rlInterfaceQueueStatisticsIfIndex	1.3.6.1.4.1.9.6.1.101.233.2.1.1	InterfaceIndex	not-accessible	Interface index.
INT rlInterfaceQueueStatisticsQueue	1.3.6.1.4.1.9.6.1.101.233.2.1.2	INTEGER	not-accessible	Queue Number
STA rlInterfaceQueueStatisticsDP	1.3.6.1.4.1.9.6.1.101.233.2.1.3	StatisticsDPType	not-accessible	Drop Precedence
C64 rlInterfaceQueueStatisticsTxPacketsEx	1.3.6.1.4.1.9.6.1.101.233.2.1.4	Counter64	read-only	The number of packets enqueued for transmission
C64 rlInterfaceQueueStatisticsTxBytes	1.3.6.1.4.1.9.6.1.101.233.2.1.5	Counter64	read-only	The number of bytes enqueued for transmission
C64 rlInterfaceQueueStatisticsDroppedPackets	1.3.6.1.4.1.9.6.1.101.233.2.1.6	Counter64	read-only	The number of tail-dropped packets
C64 rlInterfaceQueueStatisticsDroppedBytes	1.3.6.1.4.1.9.6.1.101.233.2.1.7	Counter64	read-only	The number of tail-dropped bytes

RFC description

Vendor-private MIB for Cisco Small Business switch queue statistics and traffic monitoring.

Start monitoring Cisco Small Business (SB/SG series) switch/router 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 CISCOSB-QUEUE-STATISTICS-MIB