Rmon Group 2-History; History Mib Objects; Configuring Rmon History - Lenovo ThinkSystem NE2552E Application Manual

RMON Group 2–History

History MIB Objects

Configuring RMON History

1. Enable RMON on each port where you wish to collect RMON History.
2. Configure the RMON History parameters.
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The RMON History Group allows you to sample and archive Ethernet statistics for
a specific interface during a specific time interval.
Note: RMON port statistics must be enabled for the port before an RMON history
group can monitor the port.
Data is stored in buckets, which store data gathered during discreet sampling
intervals. At each configured interval, the history instance takes a sample of the
current Ethernet statistics, and places them into a bucket. History data buckets
reside in dynamic memory. When the switch is re‐booted, the buckets are emptied.
Requested buckets are the number of buckets, or data slots, requested by the user
for each History Group. Granted buckets are the number of buckets granted by the
system, based on the amount of system memory available. The system grants a
maximum of 50 buckets.
Use an SNMP browser to view History samples.
The type of data that can be sampled must be of an ifIndex object type, as
described in RFC1213 and RFC1573. The most common data type for the history
sample is as follows:
1.3.6.1.2.1.2.2.1.1.<x>
-mgmt.interfaces.ifTable.ifIndex.interface
The last digit (x) represents the interface on which to monitor, which corresponds
to the switch port number. History sampling is done per port, by utilizing the
interface number to specify the port number.
This example configuration creates an RMON History Group to monitor port 1. It
takes a data sample every two minutes, and places the data into one of the 30
requested buckets. After 30 samples are gathered, the new samples overwrite the
previous samples, beginning with the first bucket.
NE2552E(config)# interface port 1
NE2552E(config-if)# rmon
NE2552E(config-if)# exit
NE2552E(config)# rmon history 1 interface-oid 1.3.6.1.2.1.2.2.1.1.<x>
NE2552E(config)# rmon history 1 requested-buckets 30
NE2552E(config)# rmon history 1 polling-interval 120
NE2552E(config)# rmon history 1 owner "rmon port 1 history"
where <x> is the number of the port to monitor. For example, the full OID for port
1 would be: 1.3.6.1.2.1.2.2.1.1.1
Chapter 38: Remote Monitoring
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