NAT44 does not use all addresses uniformly
Hi,
I use nat output address space:
nat44 add address 19.246.159.5 - 19.246.159.100
Configuration:
nat {
translation hash buckets 1048576
translation hash memory 268435456
user hash buckets 250
max translations per user 20000
}
Looks like external address is changing only when all port become busy:
vpp# show nat44 sessions
NAT44 sessions:
-------- thread 0 vpp_main: 292204 sessions --------
...
vpp# show nat44 addresses
NAT44 pool addresses:
19.246.159.5
tenant VRF independent
0 busy udp ports
0 busy tcp ports
0 busy icmp ports
...all others shows 0 busy ports
19.246.159.95
tenant VRF independent
0 busy udp ports
0 busy tcp ports
0 busy icmp ports
19.246.159.96
tenant VRF independent
0 busy udp ports
17804 busy tcp ports
0 busy icmp ports
19.246.159.97
tenant VRF independent
0 busy udp ports
64511 busy tcp ports
0 busy icmp ports
19.246.159.98
tenant VRF independent
0 busy udp ports
64511 busy tcp ports
0 busy icmp ports
19.246.159.99
tenant VRF independent
0 busy udp ports
64511 busy tcp ports
0 busy icmp ports
19.246.159.100
tenant VRF independent
16143 busy udp ports
64511 busy tcp ports
213 busy icmp ports
NAT44 twice-nat pool addresses:
vpp#
Is there method to make more uniform use of all output addresses?
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