Default Settings For Netflow - Cisco Nexus 7000 Series Configuration Manual

Configuring NetFlow
• The feature can be configured only on the default VDC.
• Only unicast packets are supported.
• The feature supports capture of Layer 3 NetFlow fields only. Capture of Layer 2 fields are not supported.
• The feature requires mandatory configuration of a sampler.
• After the feature is enabled, it is applied on all the line cards in the system as follows:

Default Settings for NetFlow

The following table lists the default settings for NetFlow parameters.
Table 39: Default NetFlow Parameters
Parameters
Egress and ingress cache size
Flow active timeout
Flow timeout (for F2, F2e, and F3 Series modules
only)
Flow timeout aggressive threshold
Flow timeout fast threshold
Flow timeout inactive
Flow timeout session aging
Configuring NetFlow
To configure NetFlow, follow these steps:
◦ M1/M2 line cards create sampled flows in the hardware table. The global routing table, with
512,000 entries, is shared with the regular NetFlow.
◦ F2/F2e line cards create sampled flows in the software table. The limits on the size of packets per
second (PPS) per table is shared with the regular NetFlow. An additional 1:100 sampler is also
applicable as usual.
◦ F3 line cards create flows in the software. The limits on the size of PPS per table is shared with
the regular NetFlow.
◦ The feature can be applied only in the egress direction, because the packets egress to the supervisor
module.
Cisco Nexus 7000 Series NX-OS System Management Configuration Guide
Default Settings for NetFlow
Default
512,000
1800 seconds
15 seconds
Disabled
Disabled
15 seconds
Disabled
375