N3IWF config when communicate with the distributed AMF/UPF

Am currently running individually n3iwf in free5gc
followed below steps :
step -1: IKEBindAddress: 192.168.127.1 # IP address of Nwu interface (IKE) on this N3IWF
//sudo ip link add ipsec0 type vti local remote 0.0.0.0 key
sudo ip link add ipsec0 type vti local 192.168.127.1 remote 0.0.0.0 key 5
step -2
//IPSecInterfaceMark: 5 # IPSec virtual interface mark (Any value except to 0, default value is 7 if not defined)
//IPSecInterfaceAddress: 10.0.0.1 # IP address of IPSec virtual interface (IPsec tunnel enpoint on this N3IWF)
//sudo ip address add <IPSecInterfaceAddress/CIDRPrefix> dev ipsec0
sudo ip address add 10.0.0.1 dev ipsec0
step -3 sudo ip link set dev ipsec0 up
step 4 cd ~/free5gc/
step 5 :sudo ./bin/n3iwf

Facing below error
Out put :

2022-04-21T21:58:00Z [INFO][N3IWF][Init] N3IWF Log level is set to [debug] level
2022-04-21T21:58:00Z [INFO][LIB][NGAP] set log level : info
2022-04-21T21:58:00Z [INFO][LIB][NGAP] set report call : false
2022-04-21T21:58:00Z [INFO][LIB][Aper] set log level : info
2022-04-21T21:58:00Z [INFO][LIB][Aper] set report call : false
2022-04-21T21:58:00Z [INFO][N3IWF][CFG] config version [1.0.1]
2022-04-21T21:58:00Z [INFO][N3IWF][App] n3iwf
2022-04-21T21:58:00Z [INFO][N3IWF][App] N3IWF version:
free5GC version: v3.1.0-2-g215cd8e
build time: 2022-04-20T08:01:01Z
commit hash: fbae7ce4
commit time: 2022-04-09T08:42:27Z
go version: go1.14.4 linux/amd64
2022-04-21T21:58:00Z [INFO][N3IWF][Init] Server started
2022-04-21T21:58:00Z [WARN][N3IWF][Context] Parse PKCS8 private key failed: x509: failed to parse private key (use ParsePKCS1PrivateKey instead for this key format)
2022-04-21T21:58:00Z [INFO][N3IWF][Context] Parse using PKCS1…
2022-04-21T21:58:00Z [ERRO][N3IWF][NGAP] [SCTP] DialSCTP(): connection refused
2022-04-21T21:58:00Z [INFO][N3IWF][NGAP] Retry to connect AMF after 1 second…
2022-04-21T21:58:01Z [ERRO][N3IWF][NGAP] [SCTP] DialSCTP(): connection refused
2022-04-21T21:58:01Z [INFO][N3IWF][NGAP] Retry to connect AMF after 1 second…
2022-04-21T21:58:02Z [ERRO][N3IWF][NGAP] [SCTP] DialSCTP(): connection refused
2022-04-21T21:58:02Z [DEBU][N3IWF][NGAP] [SCTP] AMF SCTP address: 127.0.0.18:38412
2022-04-21T21:58:02Z [ERRO][N3IWF][NGAP] Failed to connect to AMF.
2022-04-21T21:58:02Z [ERRO][N3IWF][Init] Start NGAP service failed: NGAP service run failed
e2324546@inblrtkc_b25g_lab:~/free5gc$ 2022-04-21T21:58:00Z [ERRO][N3IWF][NGAP] [SCTP] DialSCTP(): connection refused^C

Can any one help to resolve above error

if i resolve above error i need to replace free5gc n3iwf to our own n3iwf and test the behaviour with other NFS

Kind regards
venkatesh