We have configured netflow on our network devices, we have many devices with different link speeds eg. 100 mbps, 1Gbps, 10 Gbps. The netflow data corresponds to the usage when the link speed is upto 100 Mbps. But when the interface speed is above 100 Mbps eg: 1Gbps or 10 Gbps. We are seeing big data difference between the netflow data and the current utilization.
Example: We transferred about 200 Gb of data through a 10 Gb link within a certain period of time, but the netflow data is only showing around 10 Gb of data being transferred.
Any help is greatly appreciated.
Below is the netflow configuration it is a Cisco ASR 1006 Router
flow exporter export-to-BBU
description to BBU Netflow collector
destination Collector IP
source TenGigabitEthernet0/1/0
transport udp 2055
export-protocol netflow-v5
!
!
flow monitor FMforIP4in
exporter export-to-BBU
cache timeout active 60
cache entries 75000
record netflow-original
!
!
flow monitor FMforIP4out
exporter export-to-BBU
cache timeout active 60
cache entries 75000
record netflow-original
