router#show ver

4194304K bytes of physical memory.

Does anyone know the mib for physical memory of a cisco router? Lots of examples of memory used etc.


Nothing is easy in cisco land

-sh-4.1$ snmpwalk -v2c -c r2 router
SNMPv2-SMI::enterprises. = Gauge32: 1845398136

-sh-4.1$ snmpwalk -v2c -c r2 router
SNMPv2-SMI::enterprises. = INTEGER: 790666272

Router# sh ver
4194304K bytes of physical memory.

Both appear to be different?

  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can provide and accept your own answer.
    – Ron Maupin
    Dec 15, 2019 at 20:30

1 Answer 1


OLD-CISCO-CHASSIS-MIB::processorRam But that MIB has been deprecated since IOS 12.0.

-- *****************************************************************
-- OLD-CISCO-CHASSIS-MIB.my:  Cisco Chassis MIB file
-- May 1994, Jeffrey T. Johnson
-- Copyright (c) 1994-2008 by cisco Systems, Inc.
-- All rights reserved.
-- Starting with IOS 12.0, all objects defined in this mib have been
-- deprecated.  They have been replaces with objects defined in the
-- ENTITY-MIB.my document. Management applications should no longer
-- be examining the objects defined in this document.
-- *****************************************************************

CISCO-ENTITY-EXT-MIB::ceExtProcessorRam is where they moved it. (7 years later.)

From my 2851:

Cisco 2851 (revision 1.0) with 1032192K/16384K bytes of memory.
CISCO-ENTITY-EXT-MIB::ceExtProcessorRam.3 = Gauge32: 1073741824 bytes
OLD-CISCO-CHASSIS-MIB::processorRam.0 = INTEGER: 1056964608

The entity mib is processor + io memory (all physical ram), and the old chassis mib is showing just the processor memory (as the name suggests)

If the service-engine is configured, then physical memory is partitioned, and it may not be reflected in SNMP.

  • Strange that I get 2 different values. Free memory?
    – mrlayance
    Nov 20, 2019 at 17:55

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.