BLUECOAT-SG-HEALTHCHECK-MIB

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Organization: Blue Coat Systems, Inc.

Last Updated: 2013-05-22

Category: Vendor: Blue Coat, Web and Application Servers

Description: Manages health-check configuration and status for upstream servers monitored by Blue Coat SG proxies.

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What Is BLUECOAT-SG-HEALTHCHECK-MIB?

BLUECOAT-SG-HEALTHCHECK-MIB is a Blue Coat (now part of Broadcom/Symantec) MIB for the SG series secure web proxy appliances, exposing the built-in health-check subsystem that monitors upstream servers. It provides status data per configured health check: a named check, its current state, the time of last state change, and associated numeric/string values. Its monitoring value is centered on software/service status -- it lets administrators see whether upstream servers or services being proxied are considered healthy or failed by the proxy's own health-check engine, functioning as an early-warning system for upstream outages. It is a self-contained, vendor-specific extension without strong formal dependency on other standard MIBs beyond general SNMP conventions. It is deployed on Blue Coat SG proxy appliances in enterprise/ISP environments performing web proxying, caching, or load balancing across upstream server pools. Engineers can download the BLUECOAT-SG-HEALTHCHECK-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in BLUECOAT-SG-HEALTHCHECK-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

Blue Coat SG series secure web proxy appliance

Monitoring Examples

An admin would poll deviceHealthCheckValueTable and read deviceHealthCheckState for a given deviceHealthCheckName to see if an upstream origin server has been marked down by the proxy's health check. deviceHealthCheckTime shows when that state last changed, helping correlate a health-check failure with an upstream outage window. deviceHealthCheckMessage and deviceHealthCheckStringValues/deviceHealthCheckValues would be read for additional diagnostic detail explaining why a check failed.

What Can Be Monitored

health check name and state (up/down)
time of last health-check state change
health-check diagnostic message
numeric/string health-check values

Imported Objects

From BLUECOAT-MIB

blueCoatMgmt

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter64
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

DisplayString
TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using deviceHealthCheckTime OID:

Select a Blue Coat (Symantec/Broadcom) SG proxy appliance 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 deviceHealthCheckTime into the Find box to locate it in the OID tree, then select it and click OK. This variable indicates time (duration) in milliseconds the last health check took. 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, 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
deviceHealthCheckMIB	1.3.6.1.4.1.3417.2.7			The health check MIB is used to monitor changes in the health of upstream systems.
deviceHealthCheckMIBObjects	1.3.6.1.4.1.3417.2.7.1
deviceHealthCheckStringValues	1.3.6.1.4.1.3417.2.7.1.1
STR deviceHealthCheckMessage	1.3.6.1.4.1.3417.2.7.1.1.1	HealthCheckMessageString	read-only	The custom message generated for this change in health.
deviceHealthCheckValues	1.3.6.1.4.1.3417.2.7.1.2
deviceHealthCheckValueTable	1.3.6.1.4.1.3417.2.7.1.2.1		not-accessible	Table of Heath Check services.
deviceHealthCheckValueEntry	1.3.6.1.4.1.3417.2.7.1.2.1.1		not-accessible	A deviceHealthCheckValueTable entry describes the status of a health check service.
STR deviceHealthCheckName	1.3.6.1.4.1.3417.2.7.1.2.1.1.1	DisplayString	read-only	The name of health check service.
HEA deviceHealthCheckState	1.3.6.1.4.1.3417.2.7.1.2.1.1.2	HealthCheckStatus	read-only	This variable indicates health check state.
C64 deviceHealthCheckTimeEx	1.3.6.1.4.1.3417.2.7.1.2.1.1.3	Counter64	read-only	This variable indicates time (duration) in milliseconds the last health check took.
deviceHealthCheckMIBNotifs	1.3.6.1.4.1.3417.2.7.2
deviceHealthCheckMIBNotifsPrefix	1.3.6.1.4.1.3417.2.7.2.0
NTF deviceHealthCheckTrap	1.3.6.1.4.1.3417.2.7.2.0.1			A notification is generated when the health of a monitored system changes.
deviceHealthCheckMIBConformance	1.3.6.1.4.1.3417.2.7.3
deviceHealthCheckMIBCompliances	1.3.6.1.4.1.3417.2.7.3.1
deviceHealthCheckMIBCompliance	1.3.6.1.4.1.3417.2.7.3.1.1			The compliance statement for health check module.
deviceHealthCheckMIBGroups	1.3.6.1.4.1.3417.2.7.3.2
deviceHealthCheckMIBGroup	1.3.6.1.4.1.3417.2.7.3.2.1			Group of Health Check-related objects implemented in ProxySG appliances.
deviceHealthCheckMIBNotifGroups	1.3.6.1.4.1.3417.2.7.3.3
deviceHealthCheckMIBNotifGroup	1.3.6.1.4.1.3417.2.7.3.3.1			Group of Health Check notifications implemented in ProxySG appliances.

RFC description

Blue Coat Systems SG (Secure Gateway) vendor-private MIB; defines health check and system status monitoring objects for Blue Coat security appliances.

Start monitoring Blue Coat (Symantec/Broadcom) SG proxy appliances 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 BLUECOAT-SG-HEALTHCHECK-MIB