CISCO-SLB-DFP-MIB

All MIBs › CISCO-SLB-DFP-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2009-01-29

Category: Cisco Devices, Quality of Service, Web and Application Servers

Description: Manages Dynamic Feedback Protocol (DFP) server weight reporting for Cisco Server Load Balancing on CSM modules.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) 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.

What Is CISCO-SLB-DFP-MIB?

CISCO-SLB-DFP-MIB is a Cisco proprietary MIB for the Content Switching Module (CSM) Server Load Balancing feature, implementing Dynamic Feedback Protocol (DFP), a mechanism by which real servers report a computed 'weight' back to the load balancer reflecting their current capacity/congestion. It exposes congestion onset/abate thresholds and threshold type at a global level, and a per-processor table (cslbcProcessorDfpValTable) recording a DFP value/weight for each real server's processor along with a description. This is a load/health-monitoring MIB for the servers behind a Cisco SLB, not for the switch's own hardware: falling cslbcProcessorDfpValDfpValue values indicate a real server is becoming congested from high CPU or memory utilization or too many active client bindings, and the module also generates notifications (ciscoSlbDfpMIBNotifs) when a server crosses into or out of a congestion state. It depends on Cisco's SLB/CSM feature set for context, since the real servers and server farms it references are configured through Cisco's broader SLB MIB set. It is deployed on Cisco Content Services Switches/CSM modules performing server load balancing in data center front-end tiers. Engineers can download the CISCO-SLB-DFP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-SLB-DFP-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 Content Services Switch (CSS)
Cisco CSM (Content Switching Module)

Monitoring Examples

An operator would poll cslbcProcessorDfpValTable/cslbcProcessorDfpValEntry, tracking cslbcProcessorDfpValDfpValue per cslbcProcessorDfpValPhysicalIndex to see the current DFP weight reported for each real server's processor. A DFP value dropping toward the configured cslbcDfpCongestionOnsetThreshold signals that server is becoming overloaded and the SLB should start shifting new connections elsewhere; a subsequent ciscoSlbDfpMIBNotifs notification would confirm the congestion state change was detected.

What Can Be Monitored

per-server DFP weight/value
congestion onset/abate threshold crossing
congestion notifications per real server

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From CISCO-TC

EntPhysicalIndexOrZero

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoSlbDfpMIB	1.3.6.1.4.1.9.9.689			This MIB reports the congestion status of the real server. A server can be in congested state due to high memory consumption, high CPU utilization or high number of clients being served by it. Congestion can cause delay in server response time. DFP (Dynamic Feedback Protocol) weight values are used as a metric to monitor the congestion of the server. This MIB generates notifications when congestion state is detected on the real server. DFP weight is calculated as follows BindingWeight=(Maxbindings-numberOfBindings)/Maxbindings CPUMemWeight=(cpu + mem)/32 Weight = BindingWeightCPUMemWeightdfp_max_weight Here, - Maxbindings is the maximum number of bindings allowed on the server. - dfp_max_weight is the maximum possible value of DFP weight (24). - numberOfBindings is the number of mobile bindings currently present with the server. The DFP weight at which congestion is detected is configurable. If the DFP weight of the system falls below this value, then the system is treated as congested and notification is generated.
ciscoSlbDfpMIBNotifs	1.3.6.1.4.1.9.9.689.0
NTF cslbcSlbDfpCongestionOnset	1.3.6.1.4.1.9.9.689.0.1			The server generates this notification when value of cslbcInstanceDfpValue object drops below the threshold indicated by the cslbcDfpCongestionOnsetThreshold object.
NTF cslbcSlbDfpCongestionAbate	1.3.6.1.4.1.9.9.689.0.2			The server generates this notification when value of cslbcInstanceDfpValue object rises above the threshold indicated by the cslbcDfpCongestionAbateThreshold object.
ciscoSlbDfpMIBObjects	1.3.6.1.4.1.9.9.689.1
CSL cslbcDfpCongestionOnsetThreshold	1.3.6.1.4.1.9.9.689.1.1	CslbcDfpValue	read-write	This object specifes when congestion occurs. When the DFP level of the system drops below this value, the system is marked as congested. This value is same for all the processors.
CSL cslbcDfpCongestionAbateThreshold	1.3.6.1.4.1.9.9.689.1.2	CslbcDfpValue	read-write	This object specifies when decongestion occurs. When the DFP level of the system rises above this value, the system is marked as decongested. This value is same for all processors.
INT cslbcDfpCongestionThresholdType	1.3.6.1.4.1.9.9.689.1.3	INTEGER	accessible-for-notify	This object specifies the action taken when the congestion threshold is reached. The valid congestion action type are o reject - Incoming registration requests will be rejected when this congestion type is configured. o abort - Registration request being processed will be aborted when this congestion type is configured. o redirect - Incoming registration requests will be redirected to another Home Agent when this congestion type is configured. o drop - Existing idle mobile IP bindings will be dropped when this congestion type is configured. A mobile IP binding is a record present with the server that associates the home address given to the mobile node by its home network with the care of address granted to it by the foreign network while it is roaming. The Home Agent is a real server that maintains mobile bindings.
cslbcProcessorDfpValTable	1.3.6.1.4.1.9.9.689.1.4		not-accessible	This table lists the DFP status for each processor for which DFP weights are monitored.
cslbcProcessorDfpValEntry	1.3.6.1.4.1.9.9.689.1.4.1		not-accessible	The entry contains DFP value for one processor. A row is added to this table when congestion needs to be monitored on a processor. Row is deleted when congestion no longer needs to be monitored.
ENT cslbcProcessorDfpValPhysicalIndex	1.3.6.1.4.1.9.9.689.1.4.1.1	EntPhysicalIndexOrZero	not-accessible	This element contains the index of the physical entity or identifier of the processor for which the DFP value is maintained.
STR cslbcProcessorDfpValDescription	1.3.6.1.4.1.9.9.689.1.4.1.2	SnmpAdminString	read-only	This element contains the description for the congestion configured on for processor.
CSL cslbcProcessorDfpValDfpValue	1.3.6.1.4.1.9.9.689.1.4.1.3	CslbcDfpValue	read-only	This object indicates DFP value for the processor.
ciscoSlbDfpMIBConform	1.3.6.1.4.1.9.9.689.2
ciscoSlbDfpMIBCompliances	1.3.6.1.4.1.9.9.689.2.1
ciscoSlbDfpMIBCompliance	1.3.6.1.4.1.9.9.689.2.1.1			The compliance statement for entities which implement ciscoSlbDfp MIB module.
ciscoSlbDfpMIBGroups	1.3.6.1.4.1.9.9.689.2.2
ciscoSlbDfpInstanceGroup	1.3.6.1.4.1.9.9.689.2.2.1			This group represents the fields that identifies the processor and associated DFP value.
cslbcSlbDfpScalarsGroup	1.3.6.1.4.1.9.9.689.2.2.2			This group represents the set of thresholds against which the DFP value is compared.
cslbcSlbDfpCongestionGroup	1.3.6.1.4.1.9.9.689.2.2.3			This groutp represents the group of notifications on Home Agent.

RFC description

Cisco vendor-private MIB for Server Load Balancing (SLB) and Distributed Firewall Processor (DFP) management on content delivery platforms.

Start monitoring Cisco Content Services Switch (CSS) / CSM 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-SLB-DFP-MIB

What Is CISCO-SLB-DFP-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description