CISCO-SLB-EXT-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsCISCO-SLB-EXT-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2008-03-13

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

Description: Extends Cisco Server Load Balancing management with virtual server policies, sticky sessions, and health probe configuration.

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What Is CISCO-SLB-EXT-MIB?

CISCO-SLB-EXT-MIB extends Cisco's Server Load Balancing (SLB) management, defined in the base CISCO-SLB-MIB, with additional statistics and configuration for virtual server policies, sticky sessions, and health-probe behavior, first supported on the Cisco Content Switching Module (CSM). It belongs to Cisco's data-center load-balancing/application-delivery product line. The data it exposes is chiefly connection and policy-enforcement performance counters: current and initiated connections per real server, failed connections, and Layer 4/Layer 7 policy-match and drop counts. This MIB is used to monitor the software-level operational status of the load-balancing service, tracking connection failures, policy drops, and per-server connection load as indicators of backend server or policy-configuration health, complementing the base CISCO-SLB-MIB's real-server/virtual-server state objects. It explicitly extends CISCO-SLB-MIB and is meant to be used alongside it, and it is deployed on Cisco Catalyst 6500 CSM and related SLB platforms performing traffic distribution across pools of real servers, firewalls, or caches. Engineers can download the CISCO-SLB-EXT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-SLB-EXT-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 Catalyst 6500 Content Switching Module (CSM) and related SLB platforms

Monitoring Examples

An operator polls cslbxStatsTable/cslbxStatsTableEntry to compare cslbxStatsCurrConnections and cslbxStatsCurrServerInitConns against cslbxStatsFailedConns and cslbxStatsFailedServerInitConns for a given real server, spotting a backend server that is rejecting an unusual share of new connections. Rising cslbxStatsDroppedL4PolicyConns or cslbxStatsDroppedL7PolicyConns relative to cslbxStatsL4PolicyConns/cslbxStatsL7PolicyConns would reveal that a load-balancing policy is dropping more traffic than expected, perhaps due to a misconfigured ACL or health-probe failure marking servers down.

What Can Be Monitored

  • current connections per server
  • failed connection counts
  • Layer 4/Layer 7 policy match counts
  • dropped policy connections
  • server-initiated connection counts
Imported Objects

From CISCO-SLB-MIB

SlbConnectionState
SlbPasswordString
SlbRealServerState
SlbServerString
slbEntityOBJECT-TYPE
slbServerFarmNameOBJECT-TYPE
slbServerFarmTableEntryOBJECT-TYPE
slbStatsTableEntryOBJECT-TYPE
slbVirtualServerTableEntryOBJECT-TYPE

From CISCO-SMI

ciscoMgmtOBJECT-IDENTITY

From CISCO-TC

CiscoHTTPResponseStatusCode
CiscoIpProtocol
CiscoPort

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
Gauge32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DateAndTime
RowStatus
StorageType
TEXTUAL-CONVENTION
TimeInterval
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using cslbxStatsServerInitConns OID:

Select a Cisco Catalyst 6500 Content Switching Module (CSM) and related 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 cslbxStatsServerInitConns 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 initiated by the servers. 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 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

Extends server load balancing management for Cisco Content Switching Module with advanced SLB features.

Start monitoring Cisco Catalyst 6500 Content Switching Module (CSM) and related 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-SLB-EXT-MIB