CAPWAP-DOT11-MIB

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Organization: IETF Control And Provisioning of Wireless Access Points (CAPWAP) Working Group http://www.ietf.org/html.charters/capwap-charter.html

Last Updated: 2010-04-30

Category: Network Interfaces, Wireless and WLAN

Description: Defines managed objects for the CAPWAP protocol binding for IEEE 802.11, providing WLAN profile binding and BSS interface management.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring CAPWAP-DOT11-MIB with a free 30-day trial of IPNetwork Monitor.

What Is CAPWAP-DOT11-MIB?

CAPWAP-DOT11-MIB is an IETF standards-track MIB (RFC 5834) that defines the CAPWAP protocol binding specific to IEEE 802.11 wireless LANs, extending the base CAPWAP-BASE-MIB with 802.11 WLAN profile and BSS (Basic Service Set) management objects. It exposes a WLAN profile table describing MAC mode (split/local) and tunneling mode per WLAN, and a binding table associating each WLAN profile with the ifIndex-based BSS interface it is mapped onto, along with row-status for provisioning changes. Its monitoring focus is configuration/software-state oriented, letting an operator confirm which WLAN profiles are active, how they are bound to radio BSS interfaces, and whether their MAC/tunnel mode matches intended deployment, useful for diagnosing why an SSID isn't broadcasting on an expected access point. It explicitly depends on CAPWAP-BASE-MIB for the underlying WTP/session model and reuses its ifIndex-based interface conventions. It is deployed on wireless LAN controllers (Access Controllers) managing CAPWAP-based 802.11 access points. Engineers implementing or auditing this functionality typically reference the CAPWAP-DOT11-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in CAPWAP-DOT11-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

vendor-neutral, standards-based MIB, not tied to a specific manufacturer
wireless LAN controller (Access Controller) managing 802.11 CAPWAP access points

Monitoring Examples

An operator would check capwapDot11WlanTable/capwapDot11WlanEntry for capwapDot11WlanMacType and capwapDot11WlanTunnelMode per capwapDot11WlanProfileId to confirm whether a WLAN is running in split or local MAC mode as intended. Reviewing capwapDot11WlanBindTable's capwapDot11WlanBindWlanId to capwapDot11WlanBindBssIfIndex mapping reveals whether a given WLAN profile is actually bound to the expected radio interface, an unexpected or missing binding would explain an SSID not appearing on a specific AP. Checking capwapDot11WlanRowStatus and capwapDot11WlanBindRowStatus confirms whether recent provisioning changes have been fully applied (active) or are still pending.

What Can Be Monitored

WLAN profile MAC/tunnel mode
WLAN-to-BSS interface binding
WLAN/binding provisioning row status

Imported Objects

From CAPWAP-BASE-MIB

CapwapBaseMacTypeTC
CapwapBaseTunnelModeTC

From IF-MIB

InterfaceIndex
ifIndex	OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32
mib-2

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION

OIDs

OID symbolic	OID numeric	Type	Access	Description
capwapDot11MIB	1.3.6.1.2.1.195			Copyright (c) 2010 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info). This version of this MIB module is part of RFC 5834; see the RFC itself for full legal notices. This MIB module contains managed object definitions for CAPWAP Protocol binding for IEEE 802.11.
capwapDot11Objects	1.3.6.1.2.1.195.1
capwapDot11WlanTable	1.3.6.1.2.1.195.1.1		not-accessible	A table that allows the operator to display and configure WLAN profiles, such as specifying the MAC type and tunnel mode for a WLAN. Also, it helps the AC to configure a WLAN through the IEEE 802.11 MIB module. Values of all objects in this table are persistent at restart/reboot.
capwapDot11WlanEntry	1.3.6.1.2.1.195.1.1.1		not-accessible	A set of objects that stores the settings of a WLAN profile.
CAP capwapDot11WlanProfileId	1.3.6.1.2.1.195.1.1.1.1	CapwapDot11WlanIdProfileTC	not-accessible	Represents the identifier of a WLAN profile that has a corresponding capwapDot11WlanProfileIfIndex.
NUM capwapDot11WlanProfileIfIndex	1.3.6.1.2.1.195.1.1.1.2	InterfaceIndex	read-only	Represents the index value that uniquely identifies a WLAN Profile Interface. The interface identified by a particular value of this index is the same interface as identified by the same value of the ifIndex. The creation of a row object in the capwapDot11WlanTable triggers the AC to automatically create an WLAN Profile Interface identified by an ifIndex without manual intervention. Most MIB tables in the IEEE 802.11 MIB module [IEEE.802-11.2007] use an ifIndex to identify an interface to facilitate the configuration and maintenance, for example, dot11AuthenticationAlgorithmsTable. Using the ifIndex of a WLAN Profile Interface, the Operator could configure a WLAN through the IEEE 802.11 MIB module.
CAP capwapDot11WlanMacType	1.3.6.1.2.1.195.1.1.1.3	CapwapBaseMacTypeTC	read-create	Represents whether the WTP SHOULD support the WLAN in Local or Split MAC modes.
CAP capwapDot11WlanTunnelMode	1.3.6.1.2.1.195.1.1.1.4	CapwapBaseTunnelModeTC	read-create	Represents the frame tunneling mode to be used for IEEE 802.11 data frames from all stations associated with the WLAN. Bits are exclusive with each other for a specific WLAN profile, and only one tunnel mode could be configured. If the operator set more than one bit, the value of the Response-PDU's error-status field is set to 'wrongValue', and the value of its error-index field is set to the index of the failed variable binding.
ROW capwapDot11WlanRowStatus	1.3.6.1.2.1.195.1.1.1.5	RowStatus	read-create	This variable is used to create, modify, and/or delete a row in this table. All the objects in a row can be modified only when the value of this object in the corresponding conceptual row is not 'active'. Thus, to modify one or more of the objects in this conceptual row: a. change the row status to 'notInService', b. change the values of the row c. change the row status to 'active' The capwapDot11WlanRowStatus may be changed to 'active' if all the managed objects in the conceptual row with MAX-ACCESS read-create have been assigned valid values. When the operator deletes a WLAN profile, the AC SHOULD check whether the WLAN profile is bound with a radio. If yes, the value of the Response-PDU's error-status field is set to 'inconsistentValue', and the value of its error-index field is set to the index of the failed variable binding. If not, the row object could be deleted.
capwapDot11WlanBindTable	1.3.6.1.2.1.195.1.2		not-accessible	A table that stores bindings between WLAN profiles (identified by capwapDot11WlanProfileId) and WTP Virtual Radio Interfaces. The WTP Virtual Radio Interfaces on the AC correspond to physical layer (PHY) radios on the WTPs. It also stores the mappings between WLAN IDs and WLAN Basic Service Set (BSS) Interfaces. Values of all objects in this table are persistent at restart/reboot.
capwapDot11WlanBindEntry	1.3.6.1.2.1.195.1.2.1		not-accessible	A set of objects that stores the binding of a WLAN profile to a WTP Virtual Radio Interface. It also stores the mapping between WLAN ID and WLAN BSS Interface. The INDEX object ifIndex is the ifIndex of a WTP Virtual Radio Interface.
CAP capwapDot11WlanBindWlanId	1.3.6.1.2.1.195.1.2.1.1	CapwapDot11WlanIdTC	read-only	Represents the WLAN ID of a WLAN. During a binding operation, the AC MUST select an unused WLAN ID from between 1 and 16 [RFC5416]. For example, to bind another WLAN profile to a radio that has been bound with a WLAN profile, WLAN ID 2 should be assigned.
NUM capwapDot11WlanBindBssIfIndex	1.3.6.1.2.1.195.1.2.1.2	InterfaceIndex	read-only	Represents the index value that uniquely identifies a WLAN BSS Interface. The interface identified by a particular value of this index is the same interface as identified by the same value of the ifIndex. The ifIndex here is for a WLAN BSS Interface. The creation of a row object in the capwapDot11WlanBindTable triggers the AC to automatically create a WLAN BSS Interface identified by an ifIndex without manual intervention. The PHY address of the capwapDot11WlanBindBssIfIndex is the BSSID. While manufacturers are free to assign BSSIDs by using any arbitrary mechanism, it is advised that where possible the BSSIDs are assigned as a contiguous block. When assigned as a block, implementations can still assign any of the available BSSIDs to any WLAN. One possible method is for the WTP to assign the address using the following algorithm: base BSSID address + WLAN ID.
ROW capwapDot11WlanBindRowStatus	1.3.6.1.2.1.195.1.2.1.3	RowStatus	read-create	This variable is used to create, modify, and/or delete a row in this table. All the objects in a row can be modified only when the value of this object in the corresponding conceptual row is not 'active'. Thus, to modify one or more of the objects in this conceptual row: a. change the row status to 'notInService', b. change the values of the row c. change the row status to 'active'
capwapDot11Conformance	1.3.6.1.2.1.195.2
capwapDot11Groups	1.3.6.1.2.1.195.2.1
capwapDot11WlanGroup	1.3.6.1.2.1.195.2.1.1			A collection of objects that is used to configure the properties of a WLAN profile.
capwapDot11WlanBindGroup	1.3.6.1.2.1.195.2.1.2			A collection of objects that is used to bind the WLAN profiles with a radio.
capwapDot11Compliances	1.3.6.1.2.1.195.2.2
capwapDot11Compliance	1.3.6.1.2.1.195.2.2.1			Describes the requirements for conformance to the CAPWAP-DOT11-MIB module.

RFC description

Manages CAPWAP protocol bindings for IEEE 802.11 wireless access points, enabling centralized AP control.

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Download CAPWAP-DOT11-MIB

What Is CAPWAP-DOT11-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description