CISCO-ENHANCED-SLB-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsCISCO-ENHANCED-SLB-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2012-12-03

Category: Cisco Devices, Web and Application Servers

Description: Manages Cisco enhanced server load balancing, monitoring virtual server configurations, real server health, and connection distribution.

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-ENHANCED-SLB-MIB?

CISCO-ENHANCED-SLB-MIB extends Cisco's Server Load Balancing (SLB) management capability, adding features such as named real servers, server farm membership, health probes, and HTTP-based sticky (persistence) configuration on top of the base CISCO-SLB-MIB and CISCO-SLB-EXT-MIB. It exposes a real server table describing each backend server's name, type, IP address, description, and connection limits, alongside related configuration for weighting and redirect behavior. Its central monitoring purpose is application/service availability and load-distribution health: cesRserverMaxConns and cesRserverMinConns combined with cesRserverAdminWeight reveal how traffic is being distributed and whether a real server is nearing its connection ceiling, which functions as a software-level health and capacity indicator for the load-balanced service. It explicitly extends CISCO-SLB-MIB and CISCO-SLB-EXT-MIB and cannot be fully interpreted without them. It is deployed on Cisco Application Control Engine (ACE) and other Cisco SLB-capable data center load balancers. Network engineers evaluating or troubleshooting this functionality can download the CISCO-ENHANCED-SLB-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-ENHANCED-SLB-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 Application Control Engine (ACE) load balancers
  • Cisco Server Load Balancing (SLB) platforms

Monitoring Examples

A data center operator would poll cesRserverTable (via cesRserverEntry, keyed by cesRserverName) to check cesRserverIpAddress, cesRserverMaxConns, and cesRserverAdminWeight for each real server in a server farm. If a real server's active connection count approaches cesRserverMaxConns while cesRserverAdminWeight remains high, the load balancer may keep sending it new connections despite saturation, risking degraded response times; adjusting the weight or investigating why health probes haven't marked it down would be the next step. Notifications under ciscoEnhancedSlbMIBNotifs would typically flag when a real server transitions out of service.

What Can Be Monitored

  • real server connection count vs. max/min limits
  • real server admin weight
  • real server IP address/type
  • server farm membership
  • redirect configuration
Imported Objects

From CISCO-SLB-EXT-MIB

SlbUrlString

From CISCO-SLB-HEALTH-MON-MIB

CiscoProbeHealthMonState
cslbxProbeNameOBJECT-TYPE

From CISCO-SLB-MIB

SlbRealServerState
SlbServerString
slbEntityOBJECT-TYPE
slbServerFarmNameOBJECT-TYPE

From CISCO-SMI

ciscoMgmtOBJECT-IDENTITY

From CISCO-TC

CiscoHTTPResponseStatusCode

From INET-ADDRESS-MIB

InetAddress
InetAddressType
InetPortNumber

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DateAndTime
RowStatus
StorageType
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using cesRserverTotalConns OID:

Select a Cisco Application Control Engine (ACE) / SLB platform 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 cesRserverTotalConns 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. The total number of connections loadbalanced to this real server. 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 Counter64-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 connections), 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

RFC description

Manages Server Load Balancing (SLB) features including real server configuration, health probes, and sticky session settings for load distribution.

Start monitoring Cisco Application Control Engine (ACE) / SLB platforms 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-ENHANCED-SLB-MIB