62-3
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
OL-25340-01
Chapter 62 Configuring Flexible NetFlow
Note The match datalink dot1q vlan input option is unavailable prior to IOS Release XE 3.3.0; you
would only see the input option starting with the IOS Release XE 3.3.0.
11. Only permanent and normal flow cache types are supported.
12. Supervisor Engine 7-E and Supervisor Engine 7L-E do not support predefined records like
traditional routers (record netflow ipv4 original-input).
13. Supervisor Engine 7-E and Supervisor Engine 7L-E do not support flow based sampler.
14. Interface option not supported with Cos, Tos, TTL or Packet length options.
15. The configuration of the flow exporter does not support the option output features.
16. Flow aging in flow cache is controlled through active and in-active timer configuration. The
minimum for active and in-active aging timers is 5 seconds. The timers must be in units of 5 seconds.
Note Flows in the hardware table are deleted after 5 seconds of in-activity irrespective of the active
or in-active timer configuration values. This allows you to create new hardware flows quickly.
17. First and Last-seen flow timestamp accuracy is within 3 seconds.
18. 2048 Flow monitors and records are supported.
• When TTL is configured as a flow field, the following values are reported for a given packet TTL
value. Table 62-1 lists the packet TTL and reported values.
• When packet length is configured as a flow field, the following values are reported for a given packet
length value. Table 62-2 lists the packet length and reported values.
l
Table 62-1 TTL Map: TTL Configured
Packet TT Value Reported Value
00
11
2-10 10
11-25 25
26-50 50
51-100 100
100-150 150
150-255 255
Table 62-2 Packet Length Map: Packet Length Configured
Packet Length Reported Value
0-64 64
65-128 128
129-256 256
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