Option not applied: nat { translation hash buckets 1048576 } in VPP v25.10

[MaxB892]

#Good afternoon!

I can't apply the option in startup.conf:

nat { translation hash buckets 1048576 }

There is an error in the log: Nov 28 04:25:06 nat vpp[81634]: vlib_call_all_config_functions: unknown input nat  connection hash buckets 1048576.

Although these settings are described in the documentation, I couldn't find another way to set the hash bucket size:

https://s3-docs.fd.io/vpp/26.02/configuration/reference.html#translation-hash-buckets-n

nat Section translation hash buckets Sets the number of hash buckets in each of the two in/out NAT bi-hash lookup tables. Defaults to 1024 buckets. If the NAT is indicated to be endpoint dependent, which can be set with the endpoint-dependent parameter, then this parameter sets the number of hash buckets in each of the two endpoint dependent sessions NAT bi-hash lookup tables. translation hash buckets 1024"

Version VPP:

show version vpp v25.10-release built by root on 428091060f38 at 2025-10-29T10:56:37

Full config:cat /etc/vpp/startup.conf

`
unix {
  nodaemon
  log /var/log/vpp/vpp.log
  full-coredump
  cli-listen /run/vpp/cli.sock
  gid vpp
  cli-prompt nat-vpp1
  cli-history-limit 1000
  cli-no-pager
  startup-config /etc/vpp/nat44_config.cli
}

heapsize 6G

logging {
  default-log-level info
  default-syslog-log-level info
}

statseg {
  per-node-counters on
}

api-trace {
  on
}

api-segment {
  gid vpp
  global-size 3G
}

socksvr {
  default
}

cpu {
  main-core 1
  corelist-workers 2-15
}

plugins {
  plugin dpdk_plugin.so { enable }
  plugin nat_plugin.so { enable }
  plugin flowprobe_plugin.so { enable }
}

nat {
  translation hash buckets 1048576
}

buffers {
  buffers-per-numa 512000
  default data-size 2048
  page-size default-hugepage

  numa 0 {
      buffers 512000
  }
  numa 1 {
      buffers 0
   }
}

dpdk {
  dev 0000:12:00.1 {
    name 40GEthernet_cl
    num-rx-queues 14
    num-tx-queues 14
    num-rx-desc 4096
    num-tx-desc 4096
  }

  dev 0000:12:00.0 {
    name 40GEthernet_int
    num-rx-queues 14
    num-tx-queues 14
    num-rx-desc 4096
    num-tx-desc 4096
  }

  no-multi-seg
}`

Settings CG NAT:
cat /etc/vpp/nat44_config.cli

`set interface state 40GEthernet_cl up
set interface state 40GEthernet_int up

set interface mtu packet 1500 40GEthernet_cl
set interface mtu packet 1500 40GEthernet_int

set interface ip address 40GEthernet_cl 10.255.243.248/28

set interface ip address 40GEthernet_int 10.255.243.202/30

nat44 plugin enable sessions 500000
set nat workers 0-13
set nat timeout udp 300 tcp-established 600 tcp-transitory 240 icmp 30
set interface nat44 in 40GEthernet_cl out 40GEthernet_int
nat44 add address 30.52.214.1-30.52.215.254

ip route add 10.0.0.0/8 via 10.255.243.253 40GEthernet_cl
ip route add 192.168.0.0/16 via 10.255.243.253 40GEthernet_cl
ip route add 172.16.0.0/12 via 10.255.243.253 40GEthernet_cl
ip route add 30.52.192.0/19 via 10.255.243.253 40GEthernet_cl
ip route add 0.0.0.0/0 via 10.255.243.201 40GEthernet_int
#ip route add 30.52.214.0/23 via drop
ip route add 224.0.0.0/4 via drop
ip route add 169.254.0.0/16 via drop

ip neighbor 40GEthernet_cl 10.255.243.253 00:2a:10:fe:eb:eb
ip neighbor 40GEthernet_int 10.255.243.201 f0:7c:c7:0d:1f:fa

set ipfix exporter collector 10.224.5.199 port 2055 src 10.255.243.248 path-mtu 1450 template-interval 20
nat ipfix logging enable`