CISCO-LWAPP-DHCP-MIB

All MIBs › CISCO-LWAPP-DHCP-MIB

Organization: Cisco Systems Inc.

Last Updated: 2017-04-27

Category: Cisco Devices, Wireless and WLAN

Description: Manages DHCP proxy and scoping configurations for wireless clients on Cisco LWAPP wireless controllers.

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What Is CISCO-LWAPP-DHCP-MIB?

The CISCO-LWAPP-DHCP-MIB manages DHCP-related configuration and statistics on Cisco Wireless LAN Controllers that terminate the Lightweight Access Point Protocol tunnel from lightweight access points, covering DHCP proxy/relay behavior for wireless clients. It exposes configuration objects for DHCP option 82/37 remote-ID formatting, per-interface DHCP server addressing, and statistics tables tracking DHCP transaction counts and timeouts. Operators use it to monitor the software-level health of wireless client provisioning, watching DHCP statistics for timeout or failure counts that indicate clients are failing to obtain IP addresses, and using discontinuity timestamps to know when counters were last reset. It is closely tied to the broader LWAPP/CAPWAP wireless controller MIB family and depends on standard DHCP concepts from RFC 2131 for its option/relay semantics. It is deployed in enterprise wireless networks where a Cisco WLC centrally manages DHCP relay for clients associated with its LWAPP-controlled access points. Engineers can download the CISCO-LWAPP-DHCP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-LWAPP-DHCP-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 LWAPP-connected access points

Monitoring Examples

cLDhcpStatsConfigTable/Entry configure per-interface DHCP proxy behavior including cLDhcpServerInetAddressType/cLDhcpServerInetAddress, while cLDhcpStatsShowTable exposes the resulting transaction counters. An admin comparing counts before and after cLDhcpClearStats, or checking cLDhcpClearAllDiscontinuityTime, can determine whether a spike in DHCP timeouts governed by cLDhcpTimeout correlates with a specific DHCP server becoming unreachable, pointing to a wireless client onboarding problem.

What Can Be Monitored

DHCP transaction/timeout statistics
configured DHCP server address per interface
DHCP option 82/37 remote-ID format
statistics discontinuity time

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From CISCO-TC

CiscoURLString

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
IpAddress
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using cLDhcpDiscoverPackets OID:

Select a Cisco Wireless LAN Controller (LWAPP-based) 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 cLDhcpDiscoverPackets 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 object represents the number of DHCP discover packets sent 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
ciscoLwappDhcpMIB	1.3.6.1.4.1.9.9.792			This MIB is used to manage Dynamic Host Configuration Protocol (DHCP) related information on the devices operating as Central controllers, that terminate the Light Weight Access Point Protocol tunnel from Cisco Light-weight LWAPP Access Points. 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 them to the controller to which it is logically connected. 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. Mobile Node ( MN ) A roaming 802.11 wireless device in a wireless network associated with an access point. Mobile Node, Mobile Station(MS) and client are used interchangeably. REFERENCE [1] Wireless LAN Medium Access Control ( MAC ) and Physical Layer ( PHY ) Specifications. [2] Draft-obara-capwap-lwapp-00.txt, IETF Light Weight Access Point Protocol
ciscoLwappDhcpMIBNotif	1.3.6.1.4.1.9.9.792.0
NTF ciscoLwappDhcpScopeAddressExhaust	1.3.6.1.4.1.9.9.792.0.1			This notification will be sent whenever the DHCP Scope has no IP address available, with cLDhcpTrapSet set to true. When the clients released an IP address lately, this notification is sent with cLDhcpTrapSet set to false.
ciscoLwappDhcpMIBObjects	1.3.6.1.4.1.9.9.792.1
ciscoLwappDhcpGlobalConfig	1.3.6.1.4.1.9.9.792.1.1
T/F cLDhcpClearAllStats	1.3.6.1.4.1.9.9.792.1.1.1	TruthValue	read-write	This object specifies if the statistics of the DHCP servers is cleared or not. A 'true' value clears all the statistics of all the DHCP servers. A 'false' value specifies that statistics of all the DHCP servers has not been cleared.
INT cLDhcpOpt82RemoteIdFormat	1.3.6.1.4.1.9.9.792.1.1.2	INTEGER	read-write	This object specifies the format for RemoteId field in DHCP option 82 of the controller. apMac (1) - The DHCP Option 82 RemoteID format is set to ap-mac. apMacSsid(2) - The DHCP Option 82 RemoteID format is set to apmac::SSID. apEthMac(3) - The DHCP Option 82 RemoteId format is set to AP ethernet Mac address. apNameSsid(4) - The DHCP Option 82 RemoteID format is set to AP name - SSID. apGroupName(5) - The DHCP Option 82 RemoteID format is set to AP group Name. flexGroupName(6) - The DHCP Option 82 RemoteID format is set to flex group Name. apLocation(7) - The DHCP Option 82 RemoteID format is set to AP location. apMacVlanId(8) - The DHCP Option 82 RemoteID format is set to AP Mac vlan id. apNameVlanId(9) - The DHCP Option 82 RemoteID format is set to AP Name vlan id. apEthMacSsid(10) - The DHCP Option 82 RemoteID format is set to AP ethernet MAC SSID.
TIM cLDhcpClearAllDiscontinuityTime	1.3.6.1.4.1.9.9.792.1.1.3	TimeStamp	read-only	This object represents the value of sysUpTime on the most recent occasion at which any one or more of this DHCP server counters suffered a discontinuity. If no such discontinuities have occurred since the last re-initialization of the local management subsystem, then this object contains a zero value.
U32 cLDhcpTimeout	1.3.6.1.4.1.9.9.792.1.1.4	Unsigned32	read-write	This object specifies the time to wait for DHCP address assignment once the user associates.
INT cLDhcpOpt37RemoteIdFormat	1.3.6.1.4.1.9.9.792.1.1.5	INTEGER	read-write	This object is specific to DHCP IPV6 and it specifies the format for RemoteId field in DHCP option 37 of the controller. apMac (1) - The DHCP Option 37 RemoteID format is set to ap-mac. apMacSsid(2) - The DHCP Option 37 RemoteID format is set to apmac::SSID. apEthMac(3) - The DHCP Option 37 RemoteId format is set to AP ethernet MAC address. apNameSsid(4) - The DHCP Option 37 RemoteID format is set to AP name - SSID. apGroupName(5) - The DHCP Option 37 RemoteID format is set to AP group Name. flexGroupName(6) - The DHCP Option 37 RemoteID format is set to flex group name. apLocation(7) - The DHCP Option 37 RemoteID format is set to AP location. apMacVlanId(8) - The DHCP Option 37 RemoteID format is set to AP MAC vlan id. apNameVlanId(9) - The DHCP Option 37 RemoteID format is set to AP Name vlan id. apEthMacSsid(10) - The DHCP Option 37 RemoteID format is set to AP ethernet MAC SSID.
ciscoLwappDhcpStatsConfig	1.3.6.1.4.1.9.9.792.1.2
cLDhcpStatsConfigTable	1.3.6.1.4.1.9.9.792.1.2.1		not-accessible	This table contains the configurable attributes for statistics of the DHCP servers, uniquely identified by IP address.When DHCP server is configured for an interface or WLAN, the stats table will automatically get populated.
cLDhcpStatsConfigEntry	1.3.6.1.4.1.9.9.792.1.2.1.1		not-accessible	Each entry represents a DHCP server uniquely identified by the IP address. An entry gets added to the table on configuring a DHCP server IP address and deleted from the table when the address is deleted.
IPt cLDhcpServerInetAddressType	1.3.6.1.4.1.9.9.792.1.2.1.1.1	InetAddressType	not-accessible	This object represents the type of IP address of the DHCP server.
IP cLDhcpServerInetAddress	1.3.6.1.4.1.9.9.792.1.2.1.1.2	InetAddress	not-accessible	This object represents the IP address of the DHCP server.
T/F cLDhcpClearStats	1.3.6.1.4.1.9.9.792.1.2.1.1.3	TruthValue	read-write	This object specifies if the statistics of the DHCP server represented by the unique IP address is cleared or not. A 'true' value clears the statistics of the DHCP server represented by the unique IP address. A 'false' value specifies that statistics of the DHCP server represented by the unique IP address is not cleared.
TIM cLDhcpClearDiscontinuityTime	1.3.6.1.4.1.9.9.792.1.2.1.1.4	TimeStamp	read-only	This object represents the value of sysUpTime on the most recent occasion at which this particular DHCP server counter suffered a discontinuity. If no such discontinuities have occurred since the last re-initialization of the local management subsystem, then this object contains a zero value.
ciscoLwappDhcpStats	1.3.6.1.4.1.9.9.792.1.3
cLDhcpStatsShowTable	1.3.6.1.4.1.9.9.792.1.3.1		not-accessible	This table contains various statistics of the DHCP servers, uniquely identified by IP address.When DHCP server is configured for an interface or WLAN, the stats table will automatically get populated.
cLDhcpStatsShowEntry	1.3.6.1.4.1.9.9.792.1.3.1.1		not-accessible	Each entry represents a DHCP server uniquely identified by the IP address.
T/F cLDhcpProxy	1.3.6.1.4.1.9.9.792.1.3.1.1.1	TruthValue	read-write	This object specifies whether the proxy cLDhcpProxy is enabled or disabled. A 'true' value indicates that the cLDhcpProxy is enabled. A 'false' value indicates that the cLDhcpProxy is disabled .
C32 cLDhcpDiscoverPacketsEx	1.3.6.1.4.1.9.9.792.1.3.1.1.2	Counter32	read-only	This object represents the number of DHCP discover packets sent by the controller.
C32 cLDhcpRequestPackets	1.3.6.1.4.1.9.9.792.1.3.1.1.3	Counter32	read-only	This object represents the number of DHCP request packets sent by the controller.
C32 cLDhcpDeclinePackets	1.3.6.1.4.1.9.9.792.1.3.1.1.4	Counter32	read-only	This object represents the number of DHCP decline packets received by the controller.
C32 cLDhcpInformPackets	1.3.6.1.4.1.9.9.792.1.3.1.1.5	Counter32	read-only	This object represents the number of DHCP inform packets sent by the controller.
C32 cLDhcpReleasePackets	1.3.6.1.4.1.9.9.792.1.3.1.1.6	Counter32	read-only	This object represents the number of DHCP release packets sent by the controller.
C32 cLDhcpReplyPackets	1.3.6.1.4.1.9.9.792.1.3.1.1.7	Counter32	read-only	This object represents the number of DHCP reply packets received by the controller.
C32 cLDhcpOfferPackets	1.3.6.1.4.1.9.9.792.1.3.1.1.8	Counter32	read-only	This object represents the number of DHCP offer packets received by the controller.
C32 cLDhcpAckPackets	1.3.6.1.4.1.9.9.792.1.3.1.1.9	Counter32	read-only	This object represents the number of Ack packets sent by the controller.
C32 cLDhcpNakPackets	1.3.6.1.4.1.9.9.792.1.3.1.1.10	Counter32	read-only	This object represents the number of Nak packets sent by the controller.
C32 cLDhcpTxFailures	1.3.6.1.4.1.9.9.792.1.3.1.1.11	Counter32	read-only	This object represents the number of transmission failures received by the controller.
TIM cLDhcpLastResponseTime	1.3.6.1.4.1.9.9.792.1.3.1.1.12	TimeStamp	read-only	This object represents the time at which the last DHCP response was received by the controller.
TIM cLDhcpLastRequestTime	1.3.6.1.4.1.9.9.792.1.3.1.1.13	TimeStamp	read-only	This object represents the time at which the last DHCP request was sent by the controller.
C32 cLDhcpRxDiscoverPackets	1.3.6.1.4.1.9.9.792.1.3.1.1.14	Counter32	read-only	This object represents the number of DHCP discover packets received by the controller.
ciscoLwappDhcpScopeStats	1.3.6.1.4.1.9.9.792.1.4
cLDhcpScopeStatsTable	1.3.6.1.4.1.9.9.792.1.4.1		not-accessible	This table contains various statistics of each scope for the DHCP Server.
cLDhcpScopeStatsEntry	1.3.6.1.4.1.9.9.792.1.4.1.1		not-accessible	Each entry represents the statistics of DHCP scope.
U32 cLDhcpScopeIndex	1.3.6.1.4.1.9.9.792.1.4.1.1.1	Unsigned32	not-accessible	This object represents the DHCP scope identifier.
U32 cLDhcpScopeAddressPoolUsage	1.3.6.1.4.1.9.9.792.1.4.1.1.2	Unsigned32	read-only	This object represents the address pool usage percentage of DHCP scope.
STR cLDhcpScopeName	1.3.6.1.4.1.9.9.792.1.4.1.1.3	SnmpAdminString	read-only	This object represents the name of DHCP scope.
C32 cLDhcpScopeAllocatedIP	1.3.6.1.4.1.9.9.792.1.4.1.1.4	Counter32	read-only	This object represents the number of IP address allocated per DHCP pool.
C32 cLDhcpScopeAvailableIP	1.3.6.1.4.1.9.9.792.1.4.1.1.5	Counter32	read-only	This object represents the number of IP address available per DHCP pool.
C32 cLDhcpScopeDiscoverPkts	1.3.6.1.4.1.9.9.792.1.4.1.1.6	Counter32	read-only	This object represents the number of DHCP discover packets received per DHCP pool.
C32 cLDhcpScopeAckPkts	1.3.6.1.4.1.9.9.792.1.4.1.1.7	Counter32	read-only	This object represents the number of Ack packets received. This excludes renewing and rebinding packets per DHCP pool.
C32 cLDhcpScopeOfferPkts	1.3.6.1.4.1.9.9.792.1.4.1.1.8	Counter32	read-only	This object represents the number of DHCP offer packets received per DHCP pool.
C32 cLDhcpScopeTotalAckPkts	1.3.6.1.4.1.9.9.792.1.4.1.1.9	Counter32	read-only	This object represents the total number of Ack packets received per DHCP pool.
C32 cLDhcpScopeRequestPkts	1.3.6.1.4.1.9.9.792.1.4.1.1.10	Counter32	read-only	This object represents the number of DHCP request packets received per DHCP pool.
C32 cLDhcpScopeRequestGoodPkts	1.3.6.1.4.1.9.9.792.1.4.1.1.11	Counter32	read-only	This object represents the number of DHCP request packets which have been handled successfully per DHCP pool.
ciscoLwappDhcpMIBNotifObjects	1.3.6.1.4.1.9.9.792.1.5
T/F cLDhcpTrapSet	1.3.6.1.4.1.9.9.792.1.5.1	TruthValue	read-only	This object represents whether this trap is enabled or disabled. A value of 'true' indicates that DHCP trap is enabled A value of 'false' indicates that DHCP trap is disabled.
ciscoLwappDhcpMIBConform	1.3.6.1.4.1.9.9.792.2
ciscoLwappDhcpMIBCompliances	1.3.6.1.4.1.9.9.792.2.1
ciscoLwappDhcpMIBCompliance	1.3.6.1.4.1.9.9.792.2.1.1			The compliance statement for the SNMP entities that implement the ciscoLwappDhcpMIB module.
ciscoLwappDhcpMIBGroups	1.3.6.1.4.1.9.9.792.2.2
ciscoLwappDhcpMIBConfigGroup	1.3.6.1.4.1.9.9.792.2.2.1			This collection of objects specifies the parameters for DHCP.

RFC description

Manages DHCP information and protocol settings for Cisco Lightweight Access Point Protocol (LWAPP) Central Controllers and access points.

Start monitoring Cisco Wireless LAN Controllers (LWAPP-based) 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 CISCO-LWAPP-DHCP-MIB