[mrtg] Re: Cisco Memory Usage [Virus checked]

[Janet Post]

Hello,

The type of information you get from SNMP will depend on your IOS.  I monitor several Cisco routers and I don't think that any two are actually on the same IOS level, so I run into this problem fairly often.  Here are some excerpts from two of my config files that explain what the OIDs represent:

I hope this helps you.

#####################
#
#  Using OLD-CISCO-MEMORY-MIB to gather Memory usage statistics
#
#  .1.3.6.1.4.1.9.2.1.8.0  <--  Free Memory (in bytes)
#
#  This router is running an IOS version below 11.1, which means
#   that the newer and better CISCO-MEMORY-POOL-MIB is not supported
#  There is no way currently to tell the total memory with this OID.
#
#####################


#####################
#
#  Using CISCO MEMORY POOL MIB to gather Free Memory Statistics
#
#  .1.3.6.1.4.1.9.9.48.1.1.1.6.1
#  .1.3.6.1.4.1.9.9.48.1.1.1.6.2
#
#  The Cisco routers (as of IOS version 11.1) track memory by the
#   various pools that are created.  Each pool will have a different
#   amount of memory assigned to it.  Not all routers will use all 5
#   of the different memory pools available.  Here is a list of all the
#   memory pools and their corresponding integer value.  The last
#   number in the OID represents the memory pool.
#
#            1:  processor memory
#            2:  i/o memory
#            3:  pci memory
#            4:  fast memory
#            5:  multibus memory
#
#  These OID tracks FREE memory in bytes.  By adding the value at 48.1.1.1.5.1
#   (the USED memory in pool #1 in bytes) and 48.1.1.1.6.1, the total number of bytes
#   assigned to the pool can be discovered.  This is how the Maxbytes
#   values were choosen.  It is unknown at this time if the memory assigned
#   to a pool is dynamic between one reboot and the next.
#
#####################





>>> <Frank.Friedhof at sparkasse-lemgo.de> 02/23/04 09:31 AM >>>
Hi folks,

I´m an newbie in MRTG but i´ve planned to do my final exam with it. For
this purpose i need some Informations:

a) Which OID describes the total amount of physical memory. I know that
some Cisco Routers we use had 32 MB. But where can i read it out via SNMP ?
b) How can i can monitor the memory usage of the in a) defined value? So
that i can see from 32 MB 12 are used and 20 are free.


Thanks a lot




Mit freundlichen Grüßen
Sparkasse Lemgo
Ausbildung
Frank Friedhof
Tel.:           (0 52 22) 9 32-1 37
Fax:           (0 52 22) 9 32-8 14
E-Mail:        Frank.Friedhof at sparkasse-lemgo.de
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