27. Periodic
Monitoring
MN700004 Rev 01
314
The delta command configures a scale centered on the limit value. The value of the delta
command’s <
difference
> variable determines
delta points
, which are points located along the
scale on both sides of the limit value at distances that are whole multiples of <
difference
>:
… | <
difference
> | <
difference
>
limit
<
difference
> | <
difference
> | …
or:
…, [limit – 2
x
(difference)] , [limit - difference] ,
[limit] ,
[limit + difference] , [limit + 2
x
(difference)], …
Alerts are triggered when the measured value crosses a unit-step of the scale. For example, if
the limit is 55 and <
difference
> is 3, alerts may be generated when the value crosses any of
these values:
…46, 49, 52,
55
, 58, 61, 64…
The trigger values differ from the limit value 55 by whole multiples of the <
difference
> value,
in this case 3.
For
temperature
monitoring, the limit value is interpreted as degrees Fahrenheit or Celsius,
depending on the scale selected for monitoring.
For
port monitoring
, the limit value is interpreted as the percent of error packets. This is
defined differently for Full Duplex and Half Duplex traffic. For Full Duplex traffic, the error
rate is calculated as:
Errors(Full-Duplex) = (Total_Pkts_In) - (MultiCast_P Unicast_Pkts_In)
For Half Duplex traffic, the error rate is calculated as:
Errors(Half-Duplex) = (Total_Pkts_In) - (MultiCast_P Unicast_P
CRC_Alig Undersiz Oversiz Fragments)
Supported Standards, MIBs and RFCs
Standards
No standards are supported by this feature.
MIBs
No MIBs are supported by this feature.
RFCs
No RFCs are supported by this feature.