Cisco 4500M

40-10
Software Configuration Guide—Release 12.2(25)EW
OL-6696-01
Chapter 40 Configuring NetFlow Statistics Collection
Configuring NetFlow Statistics Collection
Note The default value of the minimum mask is zero. The configurable range for the minimum mask is from
1 to 32. You should chose an appropriate value depending on the traffic. A higher value for the minimum
mask will provide more detailed network addresses, but it may also result in increased number of flows
in the aggregation cache.
To configure a minimum prefix mask for the Router-Based Aggregation feature, perform the tasks
described in the following sections. Each task is optional.
• Configuring the Minimum Mask of a Prefix Aggregation Scheme
• Configuring the Minimum Mask of a Destination-Prefix Aggregation Scheme
• Configuring the Minimum Mask of a Source-Prefix Aggregation Scheme
• Monitoring and Maintaining Minimum Masks for Aggregation Schemes
Configuring the Minimum Mask of a Prefix Aggregation Scheme
To configure the minimum mask of a prefix aggregation scheme, perform this task:
Configuring the Minimum Mask of a Destination-Prefix Aggregation Scheme
To configure the minimum mask of a destination-prefix aggregation scheme, perform this task:
Configuring the Minimum Mask of a Source-Prefix Aggregation Scheme
To configure the minimum mask of a source-prefix aggregation scheme, perform this task:
Command Purpose
Step 1
Router(config)# ip flow-aggregation cache prefix
Configures the prefix aggregation cache.
Step 2
Router(config-flow-cache)# mask source minimum value
Specifies the minimum value for the source
mask.
Step 3
Router(config-flow-cache)# mask destination minimum value
Specifies minimum value for the
destination mask.
Command Purpose
Step 1
Router(config)# ip flow-aggregation cache destination-prefix
Configures the destination aggregation
cache.
Step 2
Router(config-flow-cache)# mask destination minimum value
Specifies the minimum value for the
destination mask.
Command Purpose
Step 1
Router(config)# ip flow-aggregation cache source-prefix
Configures the source-prefix aggregation
cache.
Step 2
Router(config-flow-cache)# mask source minimum value
Specifies the minimum value for the source
mask.