OLD-CISCO-MEMORY-MIB

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Category: Legacy Cisco IOS

Description: Provides legacy Cisco IOS memory pool utilization objects superseded by CISCO-MEMORY-POOL-MIB.

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What Is OLD-CISCO-MEMORY-MIB?

This is a legacy Cisco Systems MIB module that provided early SNMP visibility into IOS device memory pool utilization before being superseded by the more comprehensive CISCO-MEMORY-POOL-MIB. It exposes data on router/switch memory subsystems, specifically the size and utilization of named memory pools (such as processor and I/O memory) used internally by Cisco IOS. Network operators use it to monitor software/hardware health indicators like free memory, used memory, and largest available memory block, which are early-warning signs of memory exhaustion, memory leaks, or an impending device crash/reload. Because it predates and was replaced by CISCO-MEMORY-POOL-MIB, devices running modern IOS typically implement the newer MIB instead, making this module mainly relevant to older platforms or for backward-compatible polling. It is typically deployed in enterprise and service-provider networks operating legacy Cisco IOS routers and switches where long-term historical memory graphs were built against this MIB. Engineers can download the OLD-CISCO-MEMORY-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in OLD-CISCO-MEMORY-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 IOS routers and switches (legacy platforms)

Monitoring Examples

An administrator would poll the memory pool table entries to track values equivalent to free and used bytes for the processor memory pool on an aging Cisco router. A steady decline in free memory over days or weeks while used memory climbs would reveal a memory leak in a running IOS process, warning of an eventual reload. Because this MIB is superseded, some newer devices may not populate it at all, so operators often cross-check with CISCO-MEMORY-POOL-MIB. Historical dashboards built on this MIB remain useful for trending memory pressure on legacy gear.

What Can Be Monitored

free memory pool size
used memory pool size
largest available memory block
memory pool utilization trend

Imported Objects

From CISCO-SMI

local

OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

OIDs

OID symbolic	OID numeric	Type	Access	Description
INT bufferBgCreate	1.3.6.1.4.1.9.2.1.37	INTEGER	read-only	Contains the number of big buffer creates.
INT bufferBgFree	1.3.6.1.4.1.9.2.1.32	INTEGER	read-only	Contains the number of free big buffers.
INT bufferBgHit	1.3.6.1.4.1.9.2.1.34	INTEGER	read-only	Contains the number of big buffer hits.
INT bufferBgMax	1.3.6.1.4.1.9.2.1.33	INTEGER	read-only	Contains the maximum number of big buffers.
INT bufferBgMiss	1.3.6.1.4.1.9.2.1.35	INTEGER	read-only	Contains the number of big buffer misses.
INT bufferBgSize	1.3.6.1.4.1.9.2.1.30	INTEGER	read-only	Contains the size of big buffers.
INT bufferBgTotal	1.3.6.1.4.1.9.2.1.31	INTEGER	read-only	Contains the total number of big buffers.
INT bufferBgTrim	1.3.6.1.4.1.9.2.1.36	INTEGER	read-only	Contains the number of big buffer trims.
INT bufferElCreate	1.3.6.1.4.1.9.2.1.13	INTEGER	read-only	Contains the number of buffer element creates.
INT bufferElFree	1.3.6.1.4.1.9.2.1.9	INTEGER	read-only	Contains the number of free buffer elements.
INT bufferElHit	1.3.6.1.4.1.9.2.1.11	INTEGER	read-only	Contains the number of buffer element hits.
INT bufferElMax	1.3.6.1.4.1.9.2.1.10	INTEGER	read-only	Contains the maximum number of buffer elements.
INT bufferElMiss	1.3.6.1.4.1.9.2.1.12	INTEGER	read-only	Contains the number of buffer element misses.
INT bufferFail	1.3.6.1.4.1.9.2.1.46	INTEGER	read-only	Count of the number of buffer allocation failures.
INT bufferHgCreate	1.3.6.1.4.1.9.2.1.69	INTEGER	read-only	Contains the number of huge buffer creates.
INT bufferHgFree	1.3.6.1.4.1.9.2.1.64	INTEGER	read-only	Contains the number of free huge buffers.
INT bufferHgHit	1.3.6.1.4.1.9.2.1.66	INTEGER	read-only	Contains the number of huge buffer hits.
INT bufferHgMax	1.3.6.1.4.1.9.2.1.65	INTEGER	read-only	Contains the maximum number of huge buffers.
INT bufferHgMiss	1.3.6.1.4.1.9.2.1.67	INTEGER	read-only	Contains the number of huge buffer misses.
INT bufferHgSize	1.3.6.1.4.1.9.2.1.62	INTEGER	read-only	Contains the size of huge buffers.
INT bufferHgTotal	1.3.6.1.4.1.9.2.1.63	INTEGER	read-only	Contains the total number of huge buffers.
INT bufferHgTrim	1.3.6.1.4.1.9.2.1.68	INTEGER	read-only	Contains the number of huge buffer trims.
INT bufferLgCreate	1.3.6.1.4.1.9.2.1.45	INTEGER	read-only	Contains the number of large buffer creates.
INT bufferLgFree	1.3.6.1.4.1.9.2.1.40	INTEGER	read-only	Contains the number of free large buffers.
INT bufferLgHit	1.3.6.1.4.1.9.2.1.42	INTEGER	read-only	Contains the number of large buffer hits.
INT bufferLgMax	1.3.6.1.4.1.9.2.1.41	INTEGER	read-only	Contains the maximum number of large buffers.
INT bufferLgMiss	1.3.6.1.4.1.9.2.1.43	INTEGER	read-only	Contains the number of large buffer misses.
INT bufferLgSize	1.3.6.1.4.1.9.2.1.38	INTEGER	read-only	Contains the size of large buffers.
INT bufferLgTotal	1.3.6.1.4.1.9.2.1.39	INTEGER	read-only	Contains the total number of large buffers.
INT bufferLgTrim	1.3.6.1.4.1.9.2.1.44	INTEGER	read-only	Contains the number of large buffer trims.
INT bufferMdCreate	1.3.6.1.4.1.9.2.1.29	INTEGER	read-only	Contains the number of medium buffer creates.
INT bufferMdFree	1.3.6.1.4.1.9.2.1.24	INTEGER	read-only	Contains the number of free medium buffers.
INT bufferMdHit	1.3.6.1.4.1.9.2.1.26	INTEGER	read-only	Contains the number of medium buffer hits.
INT bufferMdMax	1.3.6.1.4.1.9.2.1.25	INTEGER	read-only	Contains the maximum number of medium buffers.
INT bufferMdMiss	1.3.6.1.4.1.9.2.1.27	INTEGER	read-only	Contains the number of medium buffer misses.
INT bufferMdSize	1.3.6.1.4.1.9.2.1.22	INTEGER	read-only	Contains the size of medium buffers.
INT bufferMdTotal	1.3.6.1.4.1.9.2.1.23	INTEGER	read-only	Contains the total number of medium buffers.
INT bufferMdTrim	1.3.6.1.4.1.9.2.1.28	INTEGER	read-only	Contains the number of medium buffer trims.
INT bufferNoMem	1.3.6.1.4.1.9.2.1.47	INTEGER	read-only	Count of the number of buffer create failures due to no free memory.
INT bufferSmCreate	1.3.6.1.4.1.9.2.1.21	INTEGER	read-only	Contains the number of small buffer creates.
INT bufferSmFree	1.3.6.1.4.1.9.2.1.16	INTEGER	read-only	Contains the number of free small buffers.
INT bufferSmHit	1.3.6.1.4.1.9.2.1.18	INTEGER	read-only	Contains the number of small buffer hits.
INT bufferSmMax	1.3.6.1.4.1.9.2.1.17	INTEGER	read-only	Contains the maximum number of small buffers.
INT bufferSmMiss	1.3.6.1.4.1.9.2.1.19	INTEGER	read-only	Contains the number of small buffer misses.
INT bufferSmSize	1.3.6.1.4.1.9.2.1.14	INTEGER	read-only	Contains the size of small buffers.
INT bufferSmTotal	1.3.6.1.4.1.9.2.1.15	INTEGER	read-only	Contains the total number of small buffers.
INT bufferSmTrim	1.3.6.1.4.1.9.2.1.20	INTEGER	read-only	Contains the number of small buffer trims.
INT freeMem	1.3.6.1.4.1.9.2.1.8	INTEGER	read-only	Return the amount of free memory in bytes. NOTE WELL: this mib object is obsolete as of IOS release 11.1. IOS release 11.1 introduced the CISCO-MEMORY-POOL-MIB which better instruments all of the memory pools
lmem	1.3.6.1.4.1.9.2.1

RFC description

Legacy Cisco memory pool and buffer management (obsolete as of IOS 11.1, superseded by CISCO-MEMORY-POOL-MIB).

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Download OLD-CISCO-MEMORY-MIB

What Is OLD-CISCO-MEMORY-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description