CISCO-LWAPP-U3INTERFACE-MIB

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Organization: Cisco Systems Inc.

Last Updated: 2017-10-10

Description: MIB for managing the U3 interface that steers client traffic between 3GPP cellular networks and WLAN on Cisco wireless LAN controllers

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What Is CISCO-LWAPP-U3INTERFACE-MIB?

CISCO-LWAPP-U3INTERFACE-MIB is a Cisco proprietary MIB defining the U3 interface between a Wireless LAN Controller (WLC) and a Cellular WLAN Controller (CWC), used to support Real-Time Traffic Steering (RTTS) of clients between 3GPP cellular networks and Wi-Fi. It exposes configuration and performance data for WLANs and individual clients involved in traffic-steering decisions, including throughput measurements, thresholds, and timers. Rather than general hardware health, its monitoring value is centered on software-level performance status: per-client throughput estimates, keep-alive counts, backoff timers, and reporting intervals that determine whether a client should be steered to or rejected from the WLAN. It is part of the broader CISCO-LWAPP MIB family and depends on the underlying LWAPP tunnel relationship between WLC and access points. Typical deployments are carrier Wi-Fi offload scenarios where mobile operators integrate WLANs with cellular cores for seamless traffic steering. Engineers can download the CISCO-LWAPP-U3INTERFACE-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-LWAPP-U3INTERFACE-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 LAN controller (WLC)
Cellular WLAN Controller (CWC) integration point

Monitoring Examples

An operator would poll cLU3InterfaceClientTable entries (cLU3InterfaceClientThroughput, cLU3InterfaceClientThreshold) to see whether a client's measured throughput has fallen below the configured cLU3InterfaceClientThreshold, which would trigger client rejection from the WLAN. Fields like cLU3InterfaceClientSkipCount, cLU3InterfaceClientKeepAliveCount, and cLU3InterfaceClientBackoffTimer reveal whether the steering algorithm is repeatedly skipping or backing off a problematic client. cLU3InterfaceReportingInterval and cLU3InterfaceClientEstimatePeriod control how frequently these throughput estimates are refreshed and reported to the CWC.

What Can Be Monitored

per-client throughput estimate
client throughput threshold status
client skip/backoff counts
client keep-alive count
reporting interval configuration
WLAN U3 interface status

Imported Objects

From CISCO-LWAPP-DOT11-CLIENT-MIB

cldcClientMacAddress

OBJECT-TYPE

From CISCO-LWAPP-WLAN-MIB

cLWlanIndex

OBJECT-TYPE

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoLwappU3InterfaceMIB	1.3.6.1.4.1.9.9.852			U3 Interface between WLC and CWC(Cellular WLAN Controller) is present to support Real-Time Traffic Steering(RTTS) of client between 3GPP networks and WLAN. Throughput needs to be calculated at WLC and shared with the CWC to take decision to steer the traffic to WLAN or not. It is also defined to reject client in case if throughput is not satisfactory along with periodic updation of throughput. GLOSSARY Access Point ( AP ) An entity that contains an 802.11 medium access control ( MAC ) and physical layer ( PHY ) interface and provides access to the distribution services via the wireless medium for associated clients. LWAPP APs encapsulate all the 802.11 frames in LWAPP frames and sends it to the controller to which it is logically connected to. Central Controller ( CC ) The central entity that terminates the LWAPP protocol tunnel from the LWAPP APs. Throughout this MIB, this entity also referred to as 'controller'. Light Weight Access Point Protocol ( LWAPP ) This is a generic protocol that defines the communication between the Access Points and the controllers. Cellular WLAN Controller ( CWC ) A decision making entity to steer traffic over LTE or WLAN.
ciscoLwappU3InterfaceMIBNotifs	1.3.6.1.4.1.9.9.852.0
ciscoLwappU3InterfaceMIBObjects	1.3.6.1.4.1.9.9.852.1
ciscoLwappU3InterfaceMIBTableObjects	1.3.6.1.4.1.9.9.852.1.1
cLU3InterfaceWlanTable	1.3.6.1.4.1.9.9.852.1.1.1		not-accessible	This table represents the information about u3-interface on a WLAN.
cLU3InterfaceWlanEntry	1.3.6.1.4.1.9.9.852.1.1.1.1		not-accessible	Each entry in this table represents the configuration attributes of u3-interface on a WLAN.
T/F cLU3InterfaceWlanStatus	1.3.6.1.4.1.9.9.852.1.1.1.1.1	TruthValue	read-write	This object specifies the status of u3-interface on a particular WLAN. A value of 'true' indicates that u3-interface is enabled on a WLAN. A value of 'false' indicates that u3-interface is disabled on a WLAN.
U32 cLU3InterfaceReportingInterval	1.3.6.1.4.1.9.9.852.1.1.1.1.2	Unsigned32	read-write	This object specifies the interval at which AP needs to send throughput details of all the U3 interface clients on a particular WLAN to the WLC. Reporting interval range is 30 - 90 seconds.
cLU3InterfaceClientTable	1.3.6.1.4.1.9.9.852.1.1.2		not-accessible	This table represents the information about U3 interface clients.
cLU3InterfaceClientEntry	1.3.6.1.4.1.9.9.852.1.1.2.1		not-accessible	Each entry in this table represents the U3 interface clients attributes. Some of these attributes will be sent by the CWC and some of them will be evaluated at the WLC.
U32 cLU3InterfaceClientSkipCount	1.3.6.1.4.1.9.9.852.1.1.2.1.1	Unsigned32	read-only	This object represents the number of times WLC can skip informing about estimated throughput of a U3 interface client to CWC.
U32 cLU3InterfaceClientKeepAliveCount	1.3.6.1.4.1.9.9.852.1.1.2.1.2	Unsigned32	read-only	This object represents the maximum number of times WLC can skip reporting throughput of a U3 interface client to CWC when throughput is greater than the threshold represented by cLU3InterfaceClientThreshold.
U32 cLU3InterfaceClientEstimatePeriod	1.3.6.1.4.1.9.9.852.1.1.2.1.3	Unsigned32	read-only	This object represents the interval at which WLC has to report the estimated throughput of a U3 interface client to CWC. This value is sent by CWC to WLC.
U32 cLU3InterfaceClientBackoffTimer	1.3.6.1.4.1.9.9.852.1.1.2.1.4	Unsigned32	read-only	This object represents the time for which U3 interface client will not be allowed after U3 interface client getting rejected for throughput below threshold.
U32 cLU3InterfaceClientThroughput	1.3.6.1.4.1.9.9.852.1.1.2.1.5	Unsigned32	read-only	This object represents the calculated throughput of a U3 interface client.
U32 cLU3InterfaceClientThreshold	1.3.6.1.4.1.9.9.852.1.1.2.1.6	Unsigned32	read-only	This object represents the minimum threshold throughput of a U3 interface client. The value of this object is sent by CWC to WLC. If the calculated throughput values of the Client is below the cLU3InterfaceClientThreshold have to be reported at every time interval specified in cLU3InterfaceClientEstimatePeriod.
U32 cLU3InterfaceClientEarlyLift	1.3.6.1.4.1.9.9.852.1.1.2.1.7	Unsigned32	read-only	This object represents the minimum throughput of U3 interface client to join the WLAN. The value of this object is sent by CWC to WLC.
ciscoLwappU3InterfaceMIBConform	1.3.6.1.4.1.9.9.852.2
ciscoLwappU3InterfaceMIBCompliances	1.3.6.1.4.1.9.9.852.2.1
ciscoLwappU3InterfaceMIBCompliance	1.3.6.1.4.1.9.9.852.2.1.1			The compliance statement for the SNMP entities that implement the ciscoLwappU3interfaceMIB module.
ciscoLwappU3InterfaceMIBGroups	1.3.6.1.4.1.9.9.852.2.2
cLU3InterfaceConfigGroup	1.3.6.1.4.1.9.9.852.2.2.1			This is a collection of objects which can be configured to control u3-interface parameters.
cLU3InterfaceClientMonitorGroup	1.3.6.1.4.1.9.9.852.2.2.2			This is a collection of objects which can be used to monitor the U3 interface clients parameters.

RFC description

Cisco Lightweight Access Point Protocol (LWAPP) MIB for U3 interface management on Cisco wireless access points; vendor-private extension for LWAPP device interfaces.

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Download CISCO-LWAPP-U3INTERFACE-MIB

What Is CISCO-LWAPP-U3INTERFACE-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description