Default Settings The following table lists the Flexible NetFlow default settings for the device. Table 3: Default Flexible NetFlow Settings Configuring Flexible NetFlow Default Settings Field Layer 2 In Layer 2 Out IPv4 In IP v4 Out IPv6 In IPv6 Out Notes dest-port — — Yes Yes Yes Yes Field Layer 2 In Layer 2 Out IPv4 In IP v4 Out IPv6 In IPv6 Out Notes Collect Fields Bytes long Yes Yes Yes Yes Yes Yes Packet size = (Ethernet frame size including FCS - 18 bytes) Recommended: Avoid this field and use Bytes layer2 long.
Packets long Yes Yes Yes Yes Yes Yes Timestamp absolute first Yes Yes Yes Yes Yes Yes Timestamp absolute last Yes Yes Yes Yes Yes Yes TCP flags Yes Yes Yes Yes Yes Yes Collects all flags. Bytes layer2 long Yes Yes Yes Yes Yes Yes Setting Default Flow active timeout 1800 seconds Flow timeout inactive 15 seconds Configuring Flexible NetFlow 18