Netflow CPU usage is too high


#1

Hi, i have problem with netflow… my machine is dell R220 4x Xeon 3,4GHz and traffic + - 1,5Gbit/s
cpu usage with netflow is 60%
without netflow only 10%

here is my config
vyos@NAT1# show system flow-accounting
interface eth2.1705
netflow {
engine-id 100
sampling-rate 500
server 37.221.X.X {
port XXXX
}
timeout {
expiry-interval 15
flow-generic 3600
icmp 300
max-active-life 604800
tcp-fin 300
tcp-generic 3600
tcp-rst 120
udp 300
}
version 9
}
[edit]

where is problem? is this normal? We have Mikrotik CCR before and netflow cpu usage was under 5%
thak for reply
Bohous


#2

which version of VyOS?


#3

Version is stable 1.1.8


#5

Do sampling rate and buffer size settings have any effect on it?


#6

cpu usage is higher… this config is after many tests best, but still not OK.