BLUECOAT-SG-WCCP-MIB

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Organization: Blue Coat Systems, Inc.

Last Updated: 2008-01-23

Category: Vendor: Blue Coat, Web and Application Servers

Description: Manages WCCP (Web Cache Communication Protocol) configuration and peer status on Blue Coat SG proxies.

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What Is BLUECOAT-SG-WCCP-MIB?

BLUECOAT-SG-WCCP-MIB is a Blue Coat Systems vendor-private MIB (blueCoatMgmt.5) used to monitor the status of Web Cache Communication Protocol (WCCP) on Blue Coat SG (ProxySG) appliances, which use WCCP to have upstream routers transparently redirect web traffic to the proxy. It exposes a top-level deviceWccpEnabled TruthValue plus a deviceWccpValueTable, indexed by deviceWccpIndex, whose entries report deviceWccpServiceID, deviceWccpServiceType (standard/dynamic/unknown via the WccpServiceType convention), deviceWccpServiceVersion (version1/version2 via WccpVersion), and cumulative deviceWccpPacketsRedir/deviceWccpBytesRedir counters (with matching 32-bit low-word counters for platforms without 64-bit counter support). Since WCCP redirection failures are often invisible at the application layer, polling this MIB is the primary way to confirm that a configured WCCP service is actually receiving and redirecting traffic as expected. It depends on BLUECOAT-MIB for its registration point in the blueCoatMgmt tree and is deployed on ProxySG appliances paired with WCCP-capable routers/switches in transparent proxy deployments; administrators can download the BLUECOAT-SG-WCCP-MIB file to add WCCP visibility to their monitoring platform.

IPNetwork Monitor allows you to monitor SNMP objects defined in BLUECOAT-SG-WCCP-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 proxy appliances (ProxySG)

Monitoring Examples

An operator polls deviceWccpEnabled to confirm WCCP is active, then checks deviceWccpValueTable for the configured deviceWccpServiceID to see deviceWccpPacketsRedir incrementing over successive polls; a service whose deviceWccpPacketsRedir counter stays flat while deviceWccpServiceVersion still reports version2(2) would indicate the WCCP GRE/L2 redirection path between router and proxy has stopped forwarding traffic.

What Can Be Monitored

WCCP enabled/disabled state
WCCP service ID and type (standard/dynamic)
WCCP protocol version in use
redirected packet counters
redirected byte counters

Imported Objects

From BLUECOAT-MIB

blueCoatMgmt

OBJECT-IDENTITY

From SNMPv2-SMI

Counter32
Counter64
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using deviceWccpPacketsRedir 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 deviceWccpPacketsRedir 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 variable indicates how many WCCP packets have been redirected. 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
deviceWccpMIB	1.3.6.1.4.1.3417.2.5			The deviceWccpMIB is used to monitor the status of the device's WCCP.
T/F deviceWccpEnabled	1.3.6.1.4.1.3417.2.5.1	TruthValue	read-only	When this variable is true(1) then WCCP is enabled. When it is false(2) then WCCP is not enabled.
deviceWccpMIBObjects	1.3.6.1.4.1.3417.2.5.2
deviceWccpValues	1.3.6.1.4.1.3417.2.5.2.1
deviceWccpValueTable	1.3.6.1.4.1.3417.2.5.2.1.1		not-accessible	Table of WCCP services.
deviceWccpValueEntry	1.3.6.1.4.1.3417.2.5.2.1.1.1		not-accessible	A deviceWccpValueTable entry describes the status of a WCCP service.
I32 deviceWccpIndex	1.3.6.1.4.1.3417.2.5.2.1.1.1.1	Integer32	not-accessible	An arbitrary value which uniquely identifies the WCCP service.
I32 deviceWccpServiceID	1.3.6.1.4.1.3417.2.5.2.1.1.1.2	Integer32	read-only	This variable indicates WCCP's service id.
WCC deviceWccpServiceType	1.3.6.1.4.1.3417.2.5.2.1.1.1.3	WccpServiceType	read-only	This variable indicates WCCP's service type.
WCC deviceWccpServiceVersion	1.3.6.1.4.1.3417.2.5.2.1.1.1.4	WccpVersion	read-only	This variable indicates the WCCP service's version.
C64 deviceWccpPacketsRedirEx	1.3.6.1.4.1.3417.2.5.2.1.1.1.5	Counter64	read-only	This variable indicates how many WCCP packets have been redirected.
C32 deviceWccpPacketsLowRedir	1.3.6.1.4.1.3417.2.5.2.1.1.1.6	Counter32	read-only	This variable indicates how many WCCP packets have been redirected - lower 32 bits.
C64 deviceWccpBytesRedir	1.3.6.1.4.1.3417.2.5.2.1.1.1.7	Counter64	read-only	This variable indicates how many WCCP bytes have been redirected.
C32 deviceWccpBytesLowRedir	1.3.6.1.4.1.3417.2.5.2.1.1.1.8	Counter32	read-only	This variable indicates how many WCCP bytes have been redirected - lower 32 bits.

RFC description

Blue Coat Web Cache Communication Protocol MIB for monitoring WCCP service status on security gateways.

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Download BLUECOAT-SG-WCCP-MIB