User guide

3-68 Packet Over SONET Module Installation and User Guide
Configuring the PoS Module
Configuring Flow Record Timeout
Flow records are exported on an age basis: All flow records are examined at least once
every 30 minutes. If the age of the flow record is greater than the configured timeout,
the record is exported. If the flow is still active, a new flow record will be created when
the next packet arrives.
To configure the timeout value for flow records on the specified SONET port, use the
following command:
config flowstats timeout <minutes> ports <portlist>
The timeout value is the number of minutes to use in deciding when to export flow
records. The number is an integer in the range from 1 to 1440. The default timeout is 5
minutes.
The following command example specifies a 10-minute timeout for exported NetFlow
datagrams on port 1 of the PoS module installed in slot 8 of the BlackDiamond switch.
config flowstats timeout 10 ports 8:1
Configuring a Flow Record Filter
You can configure a SONET port to maintain statistics selectively for only those flows
that match a specified filter. Each port on an PoS module supports 16 filters: eight filters
for ingress flows; eight filters for egress flows.
To configure a flow record filter for the specified SONET port, use the following
command:
config flowstats filter <filter#> {aggregation} {export <group#>}
ports <portlist> [ingress | egress] <filterspec>
where:
filter# The filter# parameter is an integer in the range from 1 to 8 that
operates with either the ingress or egress keyword to identify the
filter that is being defined.
aggregation To reduce the volume of exported data, use this optional keyword to
maintain a single set of statistics for all the flows that match the
specified filter.