CISCO-COMPRESSION-SERVICE-ADAPTER-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 1996-08-15

Category: Cisco Devices, Network Interfaces

Description: Manages Cisco Compression Service Adapter hardware modules, tracking WAN data compression statistics and adapter configuration.

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What Is CISCO-COMPRESSION-SERVICE-ADAPTER-MIB?

CISCO-COMPRESSION-SERVICE-ADAPTER-MIB is a Cisco enterprise MIB for managing the Compression Service Adapter (CSA), a hardware module installed in Cisco routers to offload WAN data compression. It exposes per-adapter traffic counters (input/output octets and packets, dropped packets), compression and decompression ratio statistics, a restart counter, and an enable/disable configuration flag. This MIB is squarely about hardware and performance status: csaNumberOfRestarts reveals adapter instability or crashes, dropped-packet counters indicate the adapter is overwhelmed or failing, and declining compression/decompression ratios signal degraded compression efficiency, all of which help an operator judge whether the CSA hardware module is healthy. It is typically used alongside standard Cisco chassis/module inventory MIBs to locate the physical adapter slot, though it does not explicitly import them here. It is deployed on Cisco routers equipped with a Compression Service Adapter card carrying compressed WAN traffic. Engineers can download the CISCO-COMPRESSION-SERVICE-ADAPTER-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-COMPRESSION-SERVICE-ADAPTER-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 routers with Compression Service Adapter (CSA) hardware module

Monitoring Examples

An operator would poll csaStatsTable/csaStatsEntry for csaInOctets/csaOutOctets and csaInPackets/csaOutPackets to gauge adapter throughput, while csaInPacketsDrop and csaOutPacketsDrop rising over time would indicate the CSA is dropping traffic, a sign of overload or hardware fault. csaNumberOfRestarts incrementing unexpectedly points to adapter crashes needing investigation, and a sustained drop in csaCompressionRatio/csaDecompressionRatio suggests the adapter is failing to compress traffic effectively even though csaEnable shows it configured on.

What Can Be Monitored

adapter input/output octets and packets
dropped packet counts
compression/decompression ratio
adapter restart count
adapter enable status

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From OLD-CISCO-CHASSIS-MIB

cardIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

TruthValue

How to Use in IPNetwork Monitor

Example using csaInOctets OID:

Select a Cisco routers with Compression Service Adapter (CSA) module (legacy) 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 csaInOctets 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. It reports the total number of compressed octets received by the compression service adaptor. 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, 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
ciscoCompressionServiceAdapterMIB	1.3.6.1.4.1.9.9.57			Used to manage the compression service adapter.
ciscoCSAMIBObjects	1.3.6.1.4.1.9.9.57.1
csaStats	1.3.6.1.4.1.9.9.57.1.1
csaStatsTable	1.3.6.1.4.1.9.9.57.1.1.1		not-accessible	A table describing performance statistics and status of compression service adapter.
csaStatsEntry	1.3.6.1.4.1.9.9.57.1.1.1.1		not-accessible	Each entry in this table describes performance statistics for a compression service. A new entry is created or removed when compression service adapter is physically added or removed from the device. Each entry is indexed by cardIndex object, which is an index for cardTable in chassis mib. Every card of type sa-compression in cardTable will have corresponding entry in csaStatsTable.
C32 csaInOctetsEx	1.3.6.1.4.1.9.9.57.1.1.1.1.1	Counter32	read-only	Total number of compressed octets received by the compression service adaptor.
C32 csaOutOctets	1.3.6.1.4.1.9.9.57.1.1.1.1.2	Counter32	read-only	Total number of compressed octets sent by the compression service adaptor.
C32 csaInPackets	1.3.6.1.4.1.9.9.57.1.1.1.1.3	Counter32	read-only	Total number of compressed packets received by the compression service adaptor.
C32 csaOutPackets	1.3.6.1.4.1.9.9.57.1.1.1.1.4	Counter32	read-only	Total number of compressed packets sent by the compression service adaptor.
C32 csaInPacketsDrop	1.3.6.1.4.1.9.9.57.1.1.1.1.5	Counter32	read-only	Total number of output packets dropped. A large number of packets dropped by a compression adaptor would indicate, amount of data being passed to the adaptor for processing, exceeds its capacity.
C32 csaOutPacketsDrop	1.3.6.1.4.1.9.9.57.1.1.1.1.6	Counter32	read-only	Total number of input packets dropped. A large number of packets dropped by a compression adaptor would indicate, amount of data being passed to the adaptor for processing, exceeds its capacity.
C32 csaNumberOfRestarts	1.3.6.1.4.1.9.9.57.1.1.1.1.7	Counter32	read-only	Number of compression session restarts. A large number of restarts could indicate incompatible remote router, data being corrupted in transmission or packet order not being maintained.
G32 csaCompressionRatio	1.3.6.1.4.1.9.9.57.1.1.1.1.8	Gauge32	read-only	Current Compression ratio, the percentage the data was compressed. This is an instantaneous value. Compression ratio of 0% would indicate no compression, a compression ratio of 90% could mean 100 octets were compressed into 10 octets.
G32 csaDecompressionRatio	1.3.6.1.4.1.9.9.57.1.1.1.1.9	Gauge32	read-only	Current decompression ratio, the percentage the data was decompressed. This is an instantaneous value. Decompression ratio of 0% would indicate no decompression, a decompression ratio of 90% could mean 10 octets were decompressed into 100 octets.
T/F csaEnable	1.3.6.1.4.1.9.9.57.1.1.1.1.10	TruthValue	read-write	Indicates whether compression service adapter is currently active. Also allows users to set status via SNMP.
ciscoCSAMIBConformance	1.3.6.1.4.1.9.9.57.3
csaMIBCompliances	1.3.6.1.4.1.9.9.57.3.1
csaMIBCompliance	1.3.6.1.4.1.9.9.57.3.1.1			The Cisco Compression Service Adapter MIB is required in all systems supporting such an adaptor.
csaMIBGroups	1.3.6.1.4.1.9.9.57.3.2
csaMIBGroup	1.3.6.1.4.1.9.9.57.3.2.1			A collection of objects providing information about Cisco compression service adapter.

RFC description

Manages compression service adapter hardware for data compression/decompression with performance monitoring.

Start monitoring Cisco routers with Compression Service Adapter (CSA) module (legacy) 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-COMPRESSION-SERVICE-ADAPTER-MIB