CISCO-LWAPP-CDP-MIB

All MIBs › CISCO-LWAPP-CDP-MIB

Organization: Cisco Systems Inc.

Last Updated: 2017-04-27

Category: Cisco Devices, Wireless and WLAN, Wireless/WiFi

Description: Manages CDP (Cisco Discovery Protocol) operation and neighbor discovery on LWAPP-managed access points.

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What Is CISCO-LWAPP-CDP-MIB?

CISCO-LWAPP-CDP-MIB manages Cisco Discovery Protocol (CDP) operation on Lightweight Access Point Protocol (LWAPP)-based wireless access points, as implemented on Cisco Wireless LAN Controllers (WLCs) acting as the Central Controller terminating the LWAPP tunnel. It exposes configuration data (enabling/disabling CDP per AP, advertisement version, message interval) and status/statistics data such as CDP packet counters and neighbor cache entries per AP. It is used to monitor the software status of CDP neighbor discovery on each lightweight AP, tracking counters like clcCdpInPackets/clcCdpOutPackets/clcCdpChecksumErrorPackets/clcCdpInvalidPackets to detect CDP protocol errors, and clcCdpApCacheTable entries to confirm expected wired-network neighbors are being discovered. It depends on the underlying LWAPP tunnel architecture and standard CDP protocol semantics shared with Cisco's IOS-based CDP-MIB. It is typically deployed on Cisco Wireless LAN Controllers managing fleets of lightweight access points in enterprise Wi-Fi deployments. Network engineers evaluating or troubleshooting this functionality can download the CISCO-LWAPP-CDP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-LWAPP-CDP-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) with lightweight access points

Monitoring Examples

An operator would poll clcCdpApTable/clcCdpApEntry to confirm clcCdpApCdpEnable is set on each managed AP, then check clcCdpApCacheTable for discovered neighbor entries to verify expected switch-port connectivity. Global counters clcCdpInPackets, clcCdpChecksumErrorPackets, and clcCdpInvalidPackets reveal CDP protocol health across the whole controller. A rising clcCdpChecksumErrorPackets or clcCdpInvalidPackets count, or missing expected entries in clcCdpApCacheTable, would indicate CDP frame corruption or a lost neighbor relationship on the wired uplink of an access point.

What Can Be Monitored

per-AP CDP enable/disable state
CDP advertisement interval/version
CDP packet counters (in/out)
CDP checksum/invalid error counts
CDP neighbor cache entries per AP

Imported Objects

From CISCO-LWAPP-AP-MIB

cLApSysMacAddress

OBJECT-TYPE

From CISCO-LWAPP-TC-MIB

CLCdpAdvtVersionType

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From CISCO-TC

CiscoNetworkAddress
CiscoNetworkProtocol

From IF-MIB

InterfaceIndexOrZero

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TruthValue

How to Use in IPNetwork Monitor

Example using clcCdpInPackets OID:

Select a Cisco Wireless LAN Controller (WLC) with lightweight access point 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 clcCdpInPackets into the Find box to locate it in the OID tree, then select it and click OK. This object represents the total number of CDP packets received by the controller. 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 (in packets), 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
ciscoLwappCdpMIB	1.3.6.1.4.1.9.9.623			This MIB is intended to be implemented on all those devices operating as Central Controllers (CC) that terminate the Light Weight Access Point Protocol tunnel from Light-weight LWAPP Access Points. This MIB provides configuration and status information about CDP neighbors of LWAPP APs. The MIB provides configuration of CDP feature on the LWAPP Access Points. The MIB can also be used to retrieve the status of the CDP cache information on the various LWAPP access points. The CDP MIB is also supported by controller and provides configuration and status information about CDP neighbors of the controller. The relationship between CC and the LWAPP APs can be depicted as follows: +......+ +......+ +......+ +......+ + + + + + + + + + CC + + CC + + CC + + CC + + + + + + + + + +......+ +......+ +......+ +......+ .. . . . .. . . . . . . . . . . . . . . . . . . . . . . . +......+ +......+ +......+ +......+ +......+ + + + + + + + + + + + AP + + AP + + AP + + AP + + AP + + + + + + + + + + + +......+ +......+ +......+ +......+ +......+ . . . . . . . . . . . . . . . . . . . . . . . . +......+ +......+ +......+ +......+ +......+ + + + + + + + + + + + MN + + MN + + MN + + MN + + MN + + + + + + + + + + + +......+ +......+ +......+ +......+ +......+ The LWAPP tunnel exists between the controller and the APs. The MNs communicate with the APs through the protocol defined by the 802.11 standard. LWAPP APs, upon bootup, discover and join one of the controllers and the controller pushes the configuration, that includes the WLAN parameters, to the LWAPP APs. The APs then encapsulate all the 802.11 frames from wireless clients inside LWAPP frames and forward the LWAPP frames to the controller. 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. Basic Service Set Identifier (BSSID) The identifier for the service set comprising of all the 802.11 stations under the control of one coordinating Access Point. This identifier happens to be the MAC address of the dot11 radio interface of the Access Point. The wireless clients that associate with the Access Point get the wired uplink through this particular dot11 interface. 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 central controller. Cisco Discovery Protocol ( CDP ) Protocol for discovery of neighboring devices. REFERENCE [1] Part 11 Wireless LAN Medium Access Control ( MAC ) and Physical Layer ( PHY ) Specifications. [2] Draft-obara-capwap-lwapp-00.txt, IETF Light Weight Access Point Protocol.
ciscoLwappCdpMIBNotifs	1.3.6.1.4.1.9.9.623.0
ciscoLwappCdpMIBObjects	1.3.6.1.4.1.9.9.623.1
clcCdpTraffic	1.3.6.1.4.1.9.9.623.1.1
C32 clcCdpInPacketsEx	1.3.6.1.4.1.9.9.623.1.1.1	Counter32	read-only	This object represents the total number of CDP packets received by the controller.
C32 clcCdpOutPackets	1.3.6.1.4.1.9.9.623.1.1.2	Counter32	read-only	This object represents the total number of CDP packets sent by the controller.
C32 clcCdpChecksumErrorPackets	1.3.6.1.4.1.9.9.623.1.1.3	Counter32	read-only	This object represents the total number of CDP packets with checksum error.
C32 clcCdpNoMemoryPackets	1.3.6.1.4.1.9.9.623.1.1.4	Counter32	read-only	This object represents the total number of CDP packets that were dropped because of no memory availability.
C32 clcCdpInvalidPackets	1.3.6.1.4.1.9.9.623.1.1.5	Counter32	read-only	This object represents the total number of CDP packets that were invalid.
clcCdpGlobalConfig	1.3.6.1.4.1.9.9.623.1.2
CLC clcCdpAdvtVersion	1.3.6.1.4.1.9.9.623.1.2.1	CLCdpAdvtVersionType	read-write	This object specifies CDP advertisement version.
U32 clcCdpMessageInterval	1.3.6.1.4.1.9.9.623.1.2.2	Unsigned32	read-write	This object specifies the interval (in seconds) at which CDP messages are to be generated.
T/F clcCdpGlobalEnable	1.3.6.1.4.1.9.9.623.1.2.3	TruthValue	read-write	This object specifies whether CDP has to be enabled or disabled on all APs. When set to 'true', internally CDP is enabled on all APs associated with the controller. When set to 'false', internally CDP is disabled on all APs associated with the controller. However, setting this attribute has no effect when CDP is disabled globally, that is when the cdpGlobalRun from the CISCO-CDP-MIB is set to 'false' on the controller.
clcCdpApCacheStatus	1.3.6.1.4.1.9.9.623.1.3
clcCdpApCacheTable	1.3.6.1.4.1.9.9.623.1.3.1		not-accessible	This table contains the cached neighbor information obtained via receiving CDP messages on APs. Entries are added to this table when a CDP advertisement is received from a neighboring device. Entries get deleted when CDP is disabled on the interface or globally.
clcCdpApCacheEntry	1.3.6.1.4.1.9.9.623.1.3.1.1		not-accessible	An entry in the clcCdpApCacheTable, containing the information received via CDP on one interface from one device. Entries appear when a CDP advertisement is received from a neighbor device. Entries disappear when CDP is disabled on the interface or globally. Consider a setup where two APs, 'AP1' and 'AP2' have been connected to a CISCO-3750 switch. Both the APs register with WLAN CONTROLLER 4400 which is on LAN/Internet/Intranet. +.........................+ + + + WLAN CONTROLLER 4400 + + 10.14.2.11 + +.........................+ .. .. INTERNET .. LAN .. +...............+ + + + SWITCH-3750 + + 10.16.1.1 + +...............+ FE 0/13 .. FE 0/15 . . . . . . . . . . +......+ +......+ + + + + + AP1 + + AP2 + + + + + +......+ +......+ 00:12:CF:DA:29:11 23:43:CE:9A:66:76 10.16.1.43 10.16.1.45 Given the above example, the clcCdpApEntry on WLAN CONTROLLER 4400 looks like : ---------------------------------------------------------------------- \| MIB - ATTRIBUTES \| ROW#1 \| ROW#2 \| ---------------------------------------------------------------------- \| cLApSysMacAddress \| 00:12:CF:DA:29:11 \| 23:43:CE:9A:66:76\| ---------------------------------------------------------------------- \| clcCdpApCacheDeviceIndex \| 16 \| 16 \| ---------------------------------------------------------------------- \| clcCdpApCacheApName \| AP1 \| AP2 \| ---------------------------------------------------------------------- \| clcCdpApCacheApAddressType \| ip(1) \| ip(1) \| ---------------------------------------------------------------------- \| clcCdpApCacheApAddress \| 10.16.1.43 \| 10.16.1.45 \| ---------------------------------------------------------------------- \| clcCdpApCacheLocalInterface \| Port - 1 \| Port -2 \| ---------------------------------------------------------------------- \| clcCdpApCacheNeighName \| SWITCH-3750 \| SWITCH-3750 \| ---------------------------------------------------------------------- \| clcCdpApCacheNeighAddressType\| ip(1) \| ip(1) \| ---------------------------------------------------------------------- \| clcCdpApCacheNeighAddress \| 10.16.1.1 \| 10.16.1.1 \| ---------------------------------------------------------------------- \| clcCdpApCacheNeighInterface \| FE 0/13 \| FE 0/45 \| ---------------------------------------------------------------------- \| clcCdpApCacheNeighVersion \| IOS Ver2.2. ... \| IOS Ver 2.2. ... \| ---------------------------------------------------------------------- \| clcCdpApCacheAdvtVersion \| cdpv1(1) \| cdpv2(2) \| ---------------------------------------------------------------------- \| clcCdpApCachePlatform \| WS-C3750-24P \| WS-C3750-24P \| ---------------------------------------------------------------------- \| clcCdpApCacheCapabilities \| RSI \| RSI \| ---------------------------------------------------------------------- \| clcCdpApCacheHoldtimeLeft \| 179 \| 165 \| ---------------------------------------------------------------------- \| clcCdpApCacheDuplex \| fullduplex(3) \| fullduplex(3) \| ---------------------------------------------------------------------- \| clcCdpApCacheInterfaceSpeed \| hundredMbps(2) \| hundredMbps(2) \| ----------------------------------------------------------------------
U32 clcCdpApCacheDeviceIndex	1.3.6.1.4.1.9.9.623.1.3.1.1.1	Unsigned32	not-accessible	This object represents a unique value for each device from which CDP messages are being received.
STR clcCdpApCacheApName	1.3.6.1.4.1.9.9.623.1.3.1.1.2	SnmpAdminString	read-only	This object represents the name assigned to this AP. If an AP is not configured its factory default name will be ap:. Eg. ap:af:12:be
IPt clcCdpApCacheApAddressType	1.3.6.1.4.1.9.9.623.1.3.1.1.3	InetAddressType	read-only	This object represents the type of address contained in the corresponding instance of clcCdpApCacheAddress for the AP.
IP clcCdpApCacheApAddress	1.3.6.1.4.1.9.9.623.1.3.1.1.4	InetAddress	read-only	This object represents the IP address of the AP.
NUM clcCdpApCacheLocalInterface	1.3.6.1.4.1.9.9.623.1.3.1.1.5	InterfaceIndexOrZero	read-only	This object represents the local port on which LWAPP encapsulated CDP packets were received.
STR clcCdpApCacheNeighName	1.3.6.1.4.1.9.9.623.1.3.1.1.6	SnmpAdminString	read-only	This object represents the Device-ID string as reported in the most recent CDP message. The zero-length string indicates no Device-ID field (TLV) was reported in the most recent CDP message.
IPt clcCdpApCacheNeighAddressType	1.3.6.1.4.1.9.9.623.1.3.1.1.7	InetAddressType	read-only	This object represents the type of address contained in the corresponding instance of clcCdpApCacheAddress of neighbor.
IP clcCdpApCacheNeighAddress	1.3.6.1.4.1.9.9.623.1.3.1.1.8	InetAddress	read-only	This object represents the (first) network-layer address of the device's SNMP-agent as reported in the most recent CDP message. For example, if the corresponding instance of clcCdpApCacheApAddressType had the value 'ip(1)', then this object would be an IP-address.
STR clcCdpApCacheNeighInterface	1.3.6.1.4.1.9.9.623.1.3.1.1.9	SnmpAdminString	read-only	This object represents the Port-ID string as reported in the most recent CDP message. This will typically be the value of the ifName object (e.g., 'Ethernet0'). The zero-length string indicates no Port-ID field (TLV) was reported in the most recent CDP message.
STR clcCdpApCacheNeighVersion	1.3.6.1.4.1.9.9.623.1.3.1.1.10	SnmpAdminString	read-only	This object represents the version string which refers to the software running on neighboring device.
CLC clcCdpApCacheAdvtVersion	1.3.6.1.4.1.9.9.623.1.3.1.1.11	CLCdpAdvtVersionType	read-write	This object specifies the Cisco Discovery Protocol advertisement version.
STR clcCdpApCachePlatform	1.3.6.1.4.1.9.9.623.1.3.1.1.12	SnmpAdminString	read-only	This object represents the device's hardware platform as reported in the most recent CDP message. The zero-length string indicates that no platform field(TLV) was reported in the most recent CDP message.
OCT clcCdpApCacheCapabilities	1.3.6.1.4.1.9.9.623.1.3.1.1.13	OCTET STRING	read-only	This object represents the device's functional capabilities as reported in the most recent CDP message. For latest set of specific values, see the latest version of the CDP specification. The zero-length string indicates no capabilities field(TLV) was reported in the most recent CDP message.
U32 clcCdpApCacheHoldtimeLeft	1.3.6.1.4.1.9.9.623.1.3.1.1.14	Unsigned32	read-only	This object represents the time left in seconds before the CDP neighbor entry gets aged-out.
INT clcCdpApCacheDuplex	1.3.6.1.4.1.9.9.623.1.3.1.1.15	INTEGER	read-only	This object represents the duplex mode of the ethernet interface between the AP and it's neighboring CDP device, as reported in the most recent CDP message. unknown(1) - indicates no duplex mode field (TLV) was reported in the most recent CDP message or the neighboring device is not connected to the AP through ethernet interface. fullduplex(2) - indicates that duplex mode of the ethernet interface between the AP and it's neighboring CDP device is set to fullduplex mode. halfduplex(3) - indicates that duplex mode of the ethernet interface between the AP and it's neighboring CDP device is set to halfduplex mode. auto(4) - indicates that duplex mode of the ethernet interface between the AP and it's neighboring CDP device is set to auto mode.
INT clcCdpApCacheInterfaceSpeed	1.3.6.1.4.1.9.9.623.1.3.1.1.16	INTEGER	read-only	This object represents the speed of the ethernet interface between the AP and it's neighboring CDP device. The unit is Mbps. This variable would be populated at AP join and periodically thereafter. none(1)- would be shown if the interface is not an ethernet interface. tenMbps(2) - indicates that the speed of the ethernet interface between the AP and it's neighboring CDP device is 10 Mbps. hundredMbps(3) - indicates that the speed of the ethernet interface between the AP and it's neighboring CDP device is 100 Mbps. thousandMbps(4) - indicates that the speed of the ethernet interface between the AP and it's neighboring CDP device is 1000 Mbps. auto(5) - indicates that the speed of the ethernet interface between the AP and it's neighboring CDP device is auto .
clcCdpCtAddressTable	1.3.6.1.4.1.9.9.623.1.3.2		not-accessible	The (conceptual) table contains the list of network-layer addresses of a neighbor interface, as reported in the Address TLV of the most recently received CDP message. The first address included in the Address TLV is saved in cdpCacheAddress. This table contains the remainder of the addresses in the Address TLV.
clcCdpCtAddressEntry	1.3.6.1.4.1.9.9.623.1.3.2.1		not-accessible	An entry (conceptual row) in the clcCdpCtAddressTable, containing the information on one address received via CDP on one interface from one device. Entries appear when a CDP advertisement is received from a neighbor device, with an Address TLV. Entries disappear when CDP is disabled on the interface, or globally. An entry or entries would also disappear if the most recently received CDP packet contain fewer address entries in the Address TLV, than are currently present in the CDP cache.
I32 clcCdpCtAddressIndex	1.3.6.1.4.1.9.9.623.1.3.2.1.1	Integer32	not-accessible	This object indicates the index of the address entry for a given cLApSysMacAddress,cdpCacheDeviceIndex pair. It has the value N-1 for the N-th address in the Address TLV.
CIS clcCdpCtAddressType	1.3.6.1.4.1.9.9.623.1.3.2.1.2	CiscoNetworkProtocol	read-only	This object represents the type of address contained in the corresponding instance of clcCdpCtAddress.
ADR clcCdpCtAddress	1.3.6.1.4.1.9.9.623.1.3.2.1.3	CiscoNetworkAddress	read-only	This object represents the N-th network-layer address of the device as reported in the most recent CDP message's address TLV, where N-1 is given by the value of clcCdpCtAddressIndex. For example, if the corresponding instance of clcCdpCtAddressType had the value 'ip(1)', then this object would be an IPv4-address. NOTE - The 1ast address received in the address TLV is available using cdpCacheAddress
clcCdpApCacheConfig	1.3.6.1.4.1.9.9.623.1.4
clcCdpApTable	1.3.6.1.4.1.9.9.623.1.4.1		not-accessible	The (conceptual) table contains the status of Cisco Discovery Protocol on LWAPP Access Points. An entry is added to the table when an Aceess Point joins a controller. An entry is deleted when the Access Point disassociates from the controller. This table is used to configure CDP feature per Access Point.
clcCdpApEntry	1.3.6.1.4.1.9.9.623.1.4.1.1		not-accessible	An entry (conceptual row) in the clcCdpApTable, containing the status of CDP on an AP. Consider a setup where two APs, 'AP1' and 'AP2' have been connected to a CISCO-3750 switch. Both the APs register with WLAN CONTROLLER 440x which is on LAN/Internet/Intranet. +.........................+ + + + WLAN CONTROLLER 4400 + + 10.14.2.11 + +.........................+ .. .. INTERNET .. LAN .. +...............+ + + + SWITCH-3750 + + 10.16.1.1 + +...............+ .. . . . . . . . . . . +......+ +......+ + + + + + AP1 + + AP2 + + + + + +......+ +......+ 00:12:CF:DA:29:11 23:43:CE:9A:66:76 10.16.1.43 10.16.1.45 Given the above example, the clcCdpApEntry on WLAN CONTROLLER 4400 looks like : ------------------------------------------------------------------ \| MIB - ATTRIBUTES \| ROW#1 \| ROW#2 \| ------------------------------------------------------------------ \| cLApSysMacAddress \| 00:12:CF:DA:29:11 \| 23:43:CE:9A:66:76 \| ------------------------------------------------------------------ \| clcCdpApStatus \| true \| false \| ------------------------------------------------------------------
T/F clcCdpApCdpEnable	1.3.6.1.4.1.9.9.623.1.4.1.1.1	TruthValue	read-write	This object specifies whether the Cisco Discovery Protocol is currently running on this AP. When set to 'true', that means CDP is enabled on the AP denoted by MAC address cLApSysMacAddress. When set to 'false', that means CDP is disabled on the AP denoted by MAC address cLApSysMacAddress. This variable has no effect when CDP is globally disabled. That is when the cdpGlobalRun from the CISCO-CDP-MIB is set to 'false'.
ciscoLwappCdpMIBConform	1.3.6.1.4.1.9.9.623.2
ciscoLwappCdpMIBCompliances	1.3.6.1.4.1.9.9.623.2.1
ciscoLwappCdpMIBCompliance	1.3.6.1.4.1.9.9.623.2.1.1			The compliance statement for the SNMP entities that implement the ciscoLwappCdpMIB module.
ciscoLwappCdpMIBComplianceRev1	1.3.6.1.4.1.9.9.623.2.1.2			The compliance statement for the SNMP entities that implement the ciscoLwappCdpMIB module.
ciscoLwappCdpMIBGroups	1.3.6.1.4.1.9.9.623.2.2
clcCdpRev01ConfigGroup	1.3.6.1.4.1.9.9.623.2.2.1			This is a collection of objects which can configured to control functional parameters of Cisco Discovery Protocol feature in WLAN controllers and LWAPP APs.
clcCdpRev01StatusGroup	1.3.6.1.4.1.9.9.623.2.2.2			This collection of objects represents the information about the general status attributes of Cisco Discovery Protocol in WLAN controllers and LWAPP APs.
clcCdpRev02StatusGroup	1.3.6.1.4.1.9.9.623.2.2.3			These are the additional objects which represent the information about the general status attributes of Cisco Discovery Protocol in WLAN controllers and LWAPP APs.

RFC description

Manages Cisco Discovery Protocol (CDP) configuration on LWAPP access points and controllers.

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Download CISCO-LWAPP-CDP-MIB