CISCO-IETF-DOT11-QOS-MIB

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Organization: Cisco System Inc.

Last Updated: 2002-03-28

Category: Cisco Devices, Quality of Service, Wireless and WLAN

Description: Manages QoS parameters for IEEE 802.11 wireless interfaces, including traffic categories and admission control.

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What Is CISCO-IETF-DOT11-QOS-MIB?

CISCO-IETF-DOT11-QOS-MIB is a Cisco wireless networking MIB that mirrors the draft IEEE 802.11e QoS extensions, used to manage quality-of-service parameters on Cisco wireless LAN access points and controllers. It exposes configuration data for traffic categories, contention window sizes, arbitration inter-frame spacing, and per-station QoS capability support. While primarily a configuration-oriented MIB, it lets an administrator monitor the operational QoS posture of the radio interface, such as which traffic categories and priority levels are currently enforced and whether QoS extensions are actually supported and active on a given client or access point. It is derived from and intended to be superseded by the IEEE 802.11e standard MIB once finalized. Typical deployment is on Cisco wireless infrastructure carrying latency-sensitive traffic like voice or video over Wi-Fi. Engineers can download the CISCO-IETF-DOT11-QOS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-IETF-DOT11-QOS-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 wireless access points
Cisco wireless LAN controllers

Monitoring Examples

An administrator reads cid11QosConfigTable (cid11QosConfigEntry rows) to check cid11TrafficCategory against its configured cid11CWmin, cid11CWmax, and cid11AIFS values, confirming that voice-priority traffic categories have tighter contention windows than best-effort traffic. Querying cid11QosSupportTable's cid11QosOptionImplemented reveals whether a particular radio or client actually implements the QoS option, which explains why some devices fail to honor cid11TrafficPriority settings. Unexpectedly high cid11MSDULifetime values combined with dropped priority traffic would point to a misconfigured QoS profile.

What Can Be Monitored

traffic category configuration
contention window (CWmin/CWmax)
arbitration inter-frame spacing (AIFS)
traffic priority
MSDU lifetime
QoS option support

Imported Objects

From CISCO-SMI

ciscoExperiment

OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using cid11QueuePeakSize OID:

Select a Cisco wireless access point or controller 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 cid11QueuePeakSize 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. This is the peak QoS priority queue size for the traffic category. 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 value climbs close to a level you consider a practical ceiling for this device, since a rising peak often signals sustained load growth worth planning capacity around. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoIetfDot11QosMIB	1.3.6.1.4.1.9.10.89			This MIB module provides network management support for QoS on wireless LAN devices. All objects defined in this MIB are listed (object names have been modified to adopt Cisco MIB object naming convention) in the IEEE 802.11E November 2001 draft. The original names of the objects in the standard are included in the REFERENCE clauses. The standard is still under development. The standard IEEE 802.11E MIB can replace some of the MIB objects in this MIB once the standard is finalized. GLOSSARY and ACRONYMS Access point (AP) Transmitter/receiver (transceiver) device that commonly connects and transports data between a wireless network and a wired network. AIFS Arbitration Interframe Space. It is one of the five different IFSs defined to provide priority levels for access to the wireless media. It shall be used by QSTAs to transmit data type frames (MPDUs) and management type frames (MMPDUs). BSS IEEE 802.11 Basic Service Set (Radio Cell). The BSS of an AP comprises of the stations directly associating with the AP. CW Contention Window. It is the time period between radio signal collisions caused by simultaneous broadcast from multiple wireless stations. The contention window is used to compute the random backoff of the radio broadcast. The IEEE 802.11b does not specify the unit for the time period. CWP Factor Contention Window Persistence Factor. It indicates the factor used in computing new CW values on every 15 unsuccessful attempt to transmit an MPDU or an MMPDU of a traffic category. It is a scaling factor in units of 1/16 ths. IFS Inter-Frame Space is the time interval between frames. A STA shall determine that the medium is idle through the use of the carrier sense function for the interval specified. In other words, the size of the IFS determines the length of the backoff time interval of a device to the medium. In this case, the medium is the radio wave spectrum. The IEEE 802.11b standard does not specify any unit for the time interval. BSS IEEE 802.11 Basic Service Set (Radio Cell). The MAC Medium Access Control. Layer 2 in the network model. MPDU MAC protocol data unit. The unit of data exchanged between two peer MAC entities using the services of the physical layer (PHY). MMPDU Management type MAC protocol data unit. MSDU MAC service data unit. Information that is delivered as a unit between MAC service access points. QBSS Quality of service basic service set. QSTA QoS station. STA (WSTA) A non-AP IEEE 802.11 wireless station.
ciscoIetfDot11QosMIBObjects	1.3.6.1.4.1.9.10.89.1
ciscoIetfDot11QosConfig	1.3.6.1.4.1.9.10.89.1.1
cid11QosConfigTable	1.3.6.1.4.1.9.10.89.1.1.1		not-accessible	This table contains the basic set of attributes to configure QoS for a wireless LAN device. This table has a sparse dependent relationship with the ifTable. Each IEEE 802.11 wireless interface has a set of configuration parameters for each IP network traffic category. For each entry in this table, there exists an entry in the ifTable of ifType ieee80211(71).
cid11QosConfigEntry	1.3.6.1.4.1.9.10.89.1.1.1.1		not-accessible	Each entry contains parameters to configure traffic contention window, AIFS, priority and MSDU lifetime for each traffic category on an IEEE 802.11 interface.
CID cid11TrafficCategory	1.3.6.1.4.1.9.10.89.1.1.1.1.1	Cid11QosTrafficCategory	not-accessible	This object specifies the traffic category.
U32 cid11CWmin	1.3.6.1.4.1.9.10.89.1.1.1.1.2	Unsigned32	read-write	This specifies the minimum contention window value for a traffic category. The backoff interval of a radio is calculated from a pseudo random integer drawn from a uniform distribution over the interval [1, CW+1], where CW is an integer within the range of values of the cid11CWmin and cid11CWmax.
U32 cid11CWmax	1.3.6.1.4.1.9.10.89.1.1.1.1.3	Unsigned32	read-write	This object specifies the maximum contention window value for a traffic category. The backoff interval of a radio is calculated from a pseudo random integer drawn from a uniform distribution over the interval [1, CW+1], where CW is an integer within the range of values of the cid11CWmin and cid11CWmax.
U32 cid11CWPFactor	1.3.6.1.4.1.9.10.89.1.1.1.1.4	Unsigned32	read-write	This object specifies the contention window persistence factor for a traffic category.
U32 cid11AIFS	1.3.6.1.4.1.9.10.89.1.1.1.1.5	Unsigned32	read-write	This object specifies the AIFS for a traffic category.
U32 cid11TrafficPriority	1.3.6.1.4.1.9.10.89.1.1.1.1.6	Unsigned32	read-write	This object specifies the actual priority this agent is going to use to delivery packets for a traffic category. This allows multiple traffic categories to map to the same priority level. The priority 7 is the highest priority and priority 1 is the lowest priority, with priority 0, which is used for best effort traffic, ordered between priority 3 and priority 2. The resulting default ordering is {7,6,5,4,3,0,2,1}. The default value is same as the traffic category value.
U32 cid11MSDULifetime	1.3.6.1.4.1.9.10.89.1.1.1.1.7	Unsigned32	read-write	This object specifies the MSDU lifetime for a traffic category.
cid11QosSupportTable	1.3.6.1.4.1.9.10.89.1.1.2		not-accessible	This table contains the attributes indicating QoS support information on the IEEE 802.11 interfaces of the device. This table has a sparse dependent relationship with the ifTable. For each entry in this table, there exists an entry in the ifTable of ifType ieee80211(71).
cid11QosSupportEntry	1.3.6.1.4.1.9.10.89.1.1.2.1		not-accessible	Each entry contains attributes to indicate if Qos and priority queue are supported for an IEEE 802.11 interface.
T/F cid11QosOptionImplemented	1.3.6.1.4.1.9.10.89.1.1.2.1.1	TruthValue	read-only	This object indicates if QoS is supported on this IEEE 802.11 network interface.
U32 cid11QueuesAvailable	1.3.6.1.4.1.9.10.89.1.1.2.1.2	Unsigned32	read-only	This object shows the number of QoS priority queues are available on this IEEE 802.11 network interface.
ciscoIetfDot11QosQueue	1.3.6.1.4.1.9.10.89.1.2
cid11QueueTable	1.3.6.1.4.1.9.10.89.1.2.1		not-accessible	This table contains the queue weight and size information and statistics for each traffic category on each the IEEE 802.11 interface. This table has a sparse dependent relationship with the ifTable. For each entry in this table, there exists an entry in the ifTable of ifType ieee80211(71).
cid11QueueEntry	1.3.6.1.4.1.9.10.89.1.2.1.1		not-accessible	Each entry contains the current queue weight, size, and peak size information for each traffic category on an IEEE 802.11 interface.
U32 cid11QueueSize	1.3.6.1.4.1.9.10.89.1.2.1.1.1	Unsigned32	read-only	This is the current QoS priority queue size for the traffic category.
C32 cid11QueuePeakSizeEx	1.3.6.1.4.1.9.10.89.1.2.1.1.2	Counter32	read-only	This is the peak QoS priority queue size for the traffic category.
ciscoIetfDot11QosStatistics	1.3.6.1.4.1.9.10.89.1.3
cid11QosStatisticsTable	1.3.6.1.4.1.9.10.89.1.3.1		not-accessible	This table contains the QoS statistics by traffic category on each the IEEE 802.11 network interface. This table has a sparse dependent relationship with the ifTable. For each entry in this table, there exists an entry in the ifTable of ifType ieee80211(71).
cid11QosStatisticsEntry	1.3.6.1.4.1.9.10.89.1.3.1.1		not-accessible	Each entry contain QoS statistics for data transmission and receive for each traffic category on an IEEE 802.11 interface.
C32 cid11QosReceivedMPDUs	1.3.6.1.4.1.9.10.89.1.3.1.1.1	Counter32	read-only	This is the counter for QoS MPDUs received on this IEEE 802.11 interface for the traffic category.
C32 cid11QosReceivedRetries	1.3.6.1.4.1.9.10.89.1.3.1.1.2	Counter32	read-only	This is the counter for Qos retries received on this IEEE 802.11 interface for the traffic category.
C32 cid11QosDiscardedFrames	1.3.6.1.4.1.9.10.89.1.3.1.1.3	Counter32	read-only	This is the counter for Qos discarded frames transmitting from this IEEE 802.11 interface for the traffic category.
C32 cid11QosTransmittedFragments	1.3.6.1.4.1.9.10.89.1.3.1.1.4	Counter32	read-only	This is the counter for Qos fragments transmitted this IEEE 802.11 interface for the traffic category.
C32 cid11QosFails	1.3.6.1.4.1.9.10.89.1.3.1.1.5	Counter32	read-only	This is the counter for Qos failures on this IEEE 802.11 interface for the traffic category.
C32 cid11QosRetries	1.3.6.1.4.1.9.10.89.1.3.1.1.6	Counter32	read-only	This is the counter for Qos retries performed on this IEEE 802.11 interface for the traffic category.
C32 cid11QosMutipleRetries	1.3.6.1.4.1.9.10.89.1.3.1.1.7	Counter32	read-only	This is the counter for Qos multiple retries performed on this IEEE 802.11 interface for the traffic category.
C32 cid11QosFrameDuplicates	1.3.6.1.4.1.9.10.89.1.3.1.1.8	Counter32	read-only	This is the counter for Qos frame duplications performed on this IEEE 802.11 interface for the traffic category.
C32 cid11QosReceivedFragments	1.3.6.1.4.1.9.10.89.1.3.1.1.9	Counter32	read-only	This is the counter for Qos fragments received on this IEEE 802.11 interface for the traffic category.
C32 cid11QosTransmittedFrames	1.3.6.1.4.1.9.10.89.1.3.1.1.10	Counter32	read-only	This is the counter for Qos frames transmitted from this IEEE 802.11 interface for the traffic category.
cid11QosIfStatisticsTable	1.3.6.1.4.1.9.10.89.1.3.2		not-accessible	This table contains the attributes indicating QoS statistics on the IEEE 802.11 interfaces of the device. This table has a sparse dependent relationship with the ifTable. For each entry in this table, there exists an entry in the ifTable of ifType ieee80211(71).
cid11QosIfStatisticsEntry	1.3.6.1.4.1.9.10.89.1.3.2.1		not-accessible	Each entry contains attributes to support QoS statistics on an IEEE 802.11 interface.
C32 cid11QosIfDiscardedFragments	1.3.6.1.4.1.9.10.89.1.3.2.1.1	Counter32	read-only	This object counts the number of QoS discarded transmitting fragments.
ciscoIetfDot11QosMIBConformance	1.3.6.1.4.1.9.10.89.2
ciscoIetfDot11QosMIBCompliances	1.3.6.1.4.1.9.10.89.2.1
ciscoIetfDot11QosMIBCompliance	1.3.6.1.4.1.9.10.89.2.1.1			The compliance statement for the configuration and status groups.
ciscoIetfDot11QosMIBGroups	1.3.6.1.4.1.9.10.89.2.2
ciscoIetfDot11QosConfigGroup	1.3.6.1.4.1.9.10.89.2.2.1			Configurations for IEEE 802.11 QoS.
ciscoIetfDot11QosQueueGroup	1.3.6.1.4.1.9.10.89.2.2.2			Configurations and statistics for IEEE 802.11 QoS queue.
ciscoIetfDot11QosStatsGroup	1.3.6.1.4.1.9.10.89.2.2.3			Status and statistics for IEEE 802.11 QoS.

RFC description

Cisco implementation of IETF standards for 802.11 wireless QoS management; monitors quality-of-service metrics for wireless devices.

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Download CISCO-IETF-DOT11-QOS-MIB