If-Mib - Cisco MCS-7825-H3-IPC1 Service Manual

Chapter 8 Industry-Standard Management Information Base
How does the Host Agent display the value in hrStorageUsed?
The hrStorageUsed for physical RAM was corrected to show the data in terms of used (buffers + cache).
To check if the host agent version is correct, collect the snmp-rpm version installed in the system by
using the show packages active snmp command.
How the memory capacity/usage values compare to those of HOST-RESOURCES-MIB?
In the HOST-RESOURCES-MIB the size and storage used are represented in terms of hrStorageUnits.
If for that storage type, the hrStorageUnits is 4096 bytes then the hrStorageUsed or hrStorageSize value
queried in the MIB value should be multiplied by 4096. For example, the show status command displays
the Total Memory as 4090068K for Physical RAM.
If hrStorageUnits for physicalRAM storage type is 4096 bytes, then hrStorageSize for Physical RAM
will be shown as 1022517 which is 4090078K [ (1022517 x 4096)/1024 = 4090068K ].
An SNMP query on hrSWRunName in HOST-RESOURCES-MIB intermittently returns incorrect entries in Windows.
The Microsoft SNMP extension agent (hostmib.dll) supports the HOST-RESOURCE-MIB. So Microsoft
support may be able to help on this. If the problem is persistent then following isrecommended:
•
•
•
•
Monitoring Processes
HOST-RESOURCES-MIB retrieves information about all the processes that are running on the system
from hrSWRunTable. Use this MIB for monitoring all the processes that are running in the system. To
monitor the only the installed Cisco application, use SYSAPPL-MIB.Disk Space and RTMT.
The used and available disk space values that are shown by HOST-RESOURCES-MIB may not match
the disk space values that are shown by RTMT due to the minfree percentage of reserved file system disk
blocks. Because the minfree value for Cisco Unified Communications Manager in 6.x and 7.0 systems
is 1 percent, you will see a 1 percent difference between the used disk space value that is shown by
RTMT and HOST-RESOURCES-MIB.
•
•

IF-MIB

This is a reformatted version of IF-MIB. Download and compile all of the MIBs in this section from
Note
http://tools.cisco.com/Support/SNMP/do/BrowseMIB.do?local=en&step=2.
OL-22523-01
Use the tlist snmp.exe file to verify the hostmib.dll is listed in the output.
Verify there are no error/warning messages from SNMP, in the event viewer, when SNMP service is
started.
Make sure the community string used has been configured with read privilege under snmp service
properties.
Use MSSQL-MIB (MssqlSrvInfoTable) to confirm sql process status.
In RTMT, the disk space used value gets shown from df reported values: [(Total Space – Available
Space) /Total Space] * 100 where the Total Space includes the minfree also.
For Host Resources MIB, the disk space used value gets calculated by
[hrStorageUsed/hrStorageSize] * 100 where the hrStorageSize does not include the minfree.
Cisco Unified Communications Manager Managed Services Guide
IF-MIB
8-105