Rmon History Collection - Allied Telesis SwitchBlade x3100 Series Manual

Introduction
Management log produced when falling threshold occurs:
•
RMON004 2004-06-16 13:34:54 6080 INFO
Location : ETH:6.0
Description: etherStatsBroadcastPkts Falling Alert
Type : Absolute
Threshold : 10
Value : 0
Refer to the Allied Telesis Log / Troubleshooting Manual for descriptions of log messages.
Note:

7.5.4 RMON History Collection

Performance management also involves collecting historical data. These statistics are organized by intervals
and buckets for a single interface or set of interfaces:
Interval - the number of seconds in which the bucket gathers the statistics until the next bucket begins col-
•
lecting data
Bucket - the container or collection of the historical data
•
The interface(s) must be enabled to collect data.
Note:
The total amount of data collected depends on the size of the intervals and the number of buckets configured.
As shown in Figure 7-14, when bucket 1 is full (a bucket being full when the interval has occurred), it becomes
bucket 2, and the new bucket 1 contains the most recent historical data. When the last bucket (in this case
bucket 4) is full and new data arrives, the data in bucket 3 becomes bucket 4, and the data that was in bucket 4
is discarded.
Buckets are a system-wide resource. For RMON data, the maximum number of buckets that can be
Note:
configured for an SBx3112 is 2700. If the user tries to add a history that will go over the 2700 limit,
the system will allocate what is available and produce a message saying how many buckets were
granted.
7-96
Software Reference for SwitchBlade x3100 Series Switches (Network Management)
RMON History Collection