DBGvpp# sh inter addr
UnknownEthernet5/0/0 (up):
  L3 192.168.1.229/24
host-ns1_tap (up):
local0 (dn):
DBGvpp# nat44 add interface address  UnknownEthernet5/0/0
DBGvpp# 

DBGvpp# create bridge-domain 1
bridge-domain 1

DBGvpp# set interface l2 bridge host-ns1_tap 1
DBGvpp# set interface l2 bridge UnknownEthernet5/0/0 1
DBGvpp# 

DBGvpp# ip route add 192.168.1.0/24 via UnknownEthernet5/0/0
DBGvpp# 

[root@localhost vpp2]# ./extras/vpp_config/scripts/dpdk-devbind.py --status

Network devices using DPDK-compatible driver
============================================
<none>

Network devices using kernel driver
===================================
0000:05:00.0 'Hi1822 Family (2*25GE)' if= drv=vfio-pci unused=hinic 
0000:06:00.0 'Hi1822 Family (2*25GE)' if= drv=vfio-pci unused=hinic 
0000:7d:00.0 'HNS GE/10GE/25GE RDMA Network Controller' if=enp125s0f0 drv=hns3 unused=hns_roce_hw_v2 
0000:7d:00.1 'HNS GE/10GE/25GE Network Controller' if=enp125s0f1 drv=hns3 unused= 
0000:7d:00.2 'HNS GE/10GE/25GE RDMA Network Controller' if=enp125s0f2 drv=hns3 unused=hns_roce_hw_v2 
0000:7d:00.3 'HNS GE/10GE/25GE Network Controller' if=enp125s0f3 drv=hns3 unused= 

Other network devices
=====================
<none>

Crypto devices using DPDK-compatible driver
===========================================
<none>

Crypto devices using kernel driver
==================================
<none>

Other crypto devices
====================
<none>

delete loopback interface intfc <interface>.

Example Usage
Example of how to configure a Layer 2 bridge-domain with three interfaces (where 200 is the bridge-domain-id):

vpp# set interface l2 bridge GigabitEthernet0/8/0.200 200
This interface is added a BVI interface:

vpp# set interface l2 bridge GigabitEthernet0/9/0.200 200 bvi
This interface also has a split-horizon group of 1 specified:

vpp# set interface l2 bridge GigabitEthernet0/a/0.200 200 1
Example of how to remove an interface from a Layer2 bridge-domain:

vpp# set interface l3 GigabitEthernet0/a/0.200

DBGvpp# set int ip address del  loop0 192.168.1.229/24
DBGvpp# set int ip address   UnknownEthernet5/0/0 192.168.1.229/24
DBGvpp#

DBGvpp# show nat44 int address
show nat44: unknown input `int address'
DBGvpp# show nat44            
show nat44: unknown input `'
DBGvpp# show nat44 interfaces            
NAT44 interfaces:
DBGvpp# nat44 add address
DBGvpp# 

set interface proxy-arp host-ns1_tap
DBGvpp# show ip neighbor
    Time                       IP                    Flags      Ethernet              Interface       
  62356.3346              192.168.1.82                 D    48:57:02:64:e7:ae UnknownEthernet5/0/0

DBGvpp# show plugin                                                  
 Plugin path is: /root/vpp/vpp2/build-root/install-vpp_debug-native/vpp/lib/aarch64-linux-gnu/vpp_plugins:/root/vpp/vpp2/build-root/install-vpp_debug-native/vpp/lib/vpp_plugins

     Plugin                                   Version                          Description
  1. ioam_plugin.so                           20.01-34~g844ec17-dirty          Inbound Operations, Administration, and Maintenance (OAM)
  2. tlspicotls_plugin.so                     20.01-34~g844ec17-dirty          Transport Layer Security (TLS) Engine, Picotls Based
  3. mdata_plugin.so                          20.01-34~g844ec17-dirty          Buffer metadata change tracker.
  4. l3xc_plugin.so                           20.01-34~g844ec17-dirty          L3 Cross-Connect (L3XC)
  5. ping_plugin.so                           20.01-34~g844ec17-dirty          Ping (ping)

set int ip address TenGigabitEthernet19/0/1 10.10.10.2/24
set int ip address TenGigabitEthernet19/0/3 10.10.11.2/24
set int state TenGigabitEthernet19/0/1 up
set int state TenGigabitEthernet19/0/3 up
set ip neighbor TenGigabitEthernet19/0/1 10.10.10.3 e4:43:4b:2e:b1:d1
set ip neighbor TenGigabitEthernet19/0/3 10.10.11.3 e4:43:4b:2e:b1:d3 

o enable NAT on VPP, I used the following commands:

nat44 add interface address TenGigabitEthernet19/0/3
nat addr-port-assignment-alg default
set interface nat44 in TenGigabitEthernet19/0/1 out
TenGigabitEthernet19/0/3 output-feature 

DBGvpp#  show hardware-interfaces host-ns1_tap verbose 
              Name                Idx   Link  Hardware
host-ns1_tap                       2     up   host-ns1_tap
  Link speed: unknown
  Ethernet address 02:fe:2a:ef:ec:4f
  Linux PACKET socket interface
DBGvpp# 

DBGvpp# set ip neighbor host-ns1_tap 192.168.2.229 44:a1:91:a4:9b:eb
DBGvpp# set ip neighbor host-ns1_tap 192.168.2.331 5a:48:af:ec:0b:0f
set ip neighbor: specify interface, IP address and MAC: `host-ns1_tap 192.168.2.331 5...'
DBGvpp# show ip neighbor
Time IP Flags Ethernet Interface
64199.9835 192.168.1.82 D 48:57:02:64:e7:ae UnknownEthernet5/0/0
67048.1874 192.168.2.229 D 44:a1:91:a4:9b:eb host-ns1_tap
DBGvpp# set ip neighbor de l host-ns1_tap 192.168.2.229 44:a1:91:a4:9b:eb
set ip neighbor: specify interface, IP address and MAC: `de l host-ns1_tap 192.168.2.2...'
DBGvpp# set ip neighbor del host-ns1_tap 192.168.2.229 44:a1:91:a4:9b:eb
DBGvpp# show ip neighbor
Time IP Flags Ethernet Interface
64199.9835 192.168.1.82 D 48:57:02:64:e7:ae UnknownEthernet5/0/0
DBGvpp#

DBGvpp# show int        
              Name               Idx    State  MTU (L3/IP4/IP6/MPLS)     Counter          Count     
UnknownEthernet5/0/0              1      up          9000/0/0/0     rx packets               3826797
                                                                    rx bytes               566893073
                                                                    tx packets                   113
                                                                    tx bytes                    6086
                                                                    drops                    3535309
                                                                    punt                       10564
                                                                    ip4                        18736
                                                                    ip6                        32810
                                                                    rx-miss                  2473683
host-ns1_tap                      2      up          9000/0/0/0     rx packets                  2432
                                                                    rx bytes                  119112
                                                                    tx packets                143988
                                                                    tx bytes                47915840
                                                                    drops                       2066
                                                                    ip4                          286
                                                                    ip6                           16
local0                            0     down          0/0/0/0       drops                          2
loop0                             3     down         9000/0/0/0     
DBGvpp#  trace add af-packet-input 2
DBGvpp# show trace
------------------- Start of thread 0 vpp_main -------------------
Packet 1

18:45:42:007434: af-packet-input
  af_packet: hw_if_index 2 next-index 4
    tpacket2_hdr:
      status 0x20000001 len 42 snaplen 42 mac 66 net 80
      sec 0x5ea109fa nsec 0x3337d1fe vlan 0 vlan_tpid 0
18:45:42:007443: ethernet-input
  ARP: 5a:48:af:ec:0b:0f -> ff:ff:ff:ff:ff:ff
18:45:42:007448: l2-input
  l2-input: sw_if_index 2 dst ff:ff:ff:ff:ff:ff src 5a:48:af:ec:0b:0f
18:45:42:007453: l2-learn
  l2-learn: sw_if_index 2 dst ff:ff:ff:ff:ff:ff src 5a:48:af:ec:0b:0f bd_index 1
18:45:42:007458: error-drop
  rx:host-ns1_tap
18:45:42:007462: drop
  l2-flood: L2 replication complete

Packet 2

18:45:43:047072: af-packet-input
  af_packet: hw_if_index 2 next-index 4
    tpacket2_hdr:
      status 0x20000001 len 42 snaplen 42 mac 66 net 80
      sec 0x5ea109fb nsec 0x359a24a8 vlan 0 vlan_tpid 0
18:45:43:047077: ethernet-input
  ARP: 5a:48:af:ec:0b:0f -> ff:ff:ff:ff:ff:ff
18:45:43:047081: l2-input
  l2-input: sw_if_index 2 dst ff:ff:ff:ff:ff:ff src 5a:48:af:ec:0b:0f
DBGvpp# clear trace                                                                                              
DBGvpp# 

DBGvpp# ping 192.168.1.82 source UnknownEthernet5/0/0 
116 bytes from 192.168.1.82: icmp_seq=1 ttl=64 time=.1125 ms
116 bytes from 192.168.1.82: icmp_seq=2 ttl=64 time=.0599 ms
116 bytes from 192.168.1.82: icmp_seq=3 ttl=64 time=.0571 ms

[root@localhost vpp2]# 

set int state wan0 up
set int state wan1 up

set int ip address wan0 172.78.10.155/29
set dhcp client intfc wan1 hostname test-wans

ip route add 0.0.0.0/0 via 172.78.10.158 wan0

vpp# ping 8.8.8.8 source wan0
vpp# ping 8.8.8.8 source wan1

DBGvpp# 
DBGvpp# ip table  add 1      
DBGvpp# ip table  del 1
DBGvpp# 

DBGvpp# show nat44 sessions detail
NAT44 sessions:
-------- thread 0 vpp_main: 0 sessions --------
DBGvpp# 

DBGvpp# ping 192.168.117.82 source   host-ns7_tap repeat 2
Failed: no source address for egress interface
Failed: no source address for egress interface

Statistics: 0 sent, 0 received, 0% packet loss
DBGvpp# 

DBGvpp# show l2fib verbose                                
    Mac-Address     BD-Idx If-Idx BSN-ISN Age(min) static filter bvi         Interface-Name        
 fa:16:3e:78:00:62    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 fa:16:3e:29:06:df    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 a4:bf:01:68:49:aa    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 fa:16:3e:44:a6:12    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 10:81:84:00:34:23    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 fa:16:3e:c3:a4:b6    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 30:e9:8e:7d:57:7a    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 9c:52:f8:67:c4:d3    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 30:e9:8e:90:18:f9    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 fa:16:3e:22:fe:e7    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 f4:79:60:82:1e:29    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0     
 f4:79:60:fe:45:b6    1      1      0/1      -       -      -     -       UnknownEthernet5/0/0   

DBGvpp# show int addr
UnknownEthernet5/0/0 (up):
  L2 bridge bd-id 1 idx 1 shg 0  
host-ns1_tap (up):
  L2 bridge bd-id 1 idx 1 shg 0  
host-ns7_tap (up):
  L2 bridge bd-id 1 idx 1 shg 0  
  L3 192.168.1.2/24 ip4 table-id 100 fib-idx 1
local0 (dn):
loop0 (up):
  L2 bridge bd-id 1 idx 1 shg 0 bvi
  L3 192.168.1.1/24
DBGvpp#

show int addr         

DBGvpp# nat44 add  address 192.168.1.211 tenant-vrf 200                                                          
DBGvpp# ip table add 300
DBGvpp# set interface ip table  host-ns1_tap 300
DBGvpp# nat44 add  address 192.168.1.213 tenant-vrf 200
DBGvpp# show nat44 addresses
NAT44 pool addresses:
192.168.1.210
  tenant VRF: 100
  0 busy udp ports
  0 busy tcp ports
  0 busy icmp ports
192.168.1.211
  tenant VRF: 200
  0 busy udp ports
  0 busy tcp ports
  0 busy icmp ports
192.168.1.213
  tenant VRF: 200
  0 busy udp ports
  0 busy tcp ports
  0 busy icmp ports
NAT44 twice-nat pool addresses:
DBGvpp# nat44 add  address 192.168.1.213 tenant-vrf 200
nat44 add address: NAT address already in use.
DBGvpp# nat44 del  address 192.168.1.213 tenant-vrf 200
nat44 del: unknown input ` address 192.168.1.213 tenant-...'
DBGvpp# nat44 add static mapping                       
DBGvpp# 

DBGvpp# nat44 add interface address UnknownEthernet5/0/0
DBGvpp# set interface nat44 in loop0 out UnknownEthernet5/0/0   
DBGvpp# nat44 forwarding enable
DBGvpp# nat44 add static mapping local 192.168.1.xxx <REDACTED-inside-port> external GigabitEthernet3/0/0 <REDACTE tcp                                                                            
tcp: unknown input `'
DBGvpp# set int nat44 in UnknownEthernet5/0/0  out UnknownEthernet5/0/0 
DBGvpp# 

DBGvpp# delete host-interface name ns8_tap
DBGvpp#

create host-interface name ns8_tap

nat44 add static mapping external 192.168.1.231   external UnknownEthernet5/0/0 del
nat44 add interface address  loop0 del 

DBGvpp# ip route del 0.0.0.0/0 table 100 via 10.10.16.229  loop0  
DBGvpp# ip route add 0.0.0.0/0 table 100 via 10.10.16.229  host-ns1_tap

DBGvpp# show ip fib  summary                                                                                     
ipv4-VRF:0, fib_index:0, flow hash:[src dst sport dport proto ] epoch:0 flags:none locks:[adjacency:1, default-route:1, nat-hi:2, ]
    Prefix length         Count     
                   0               1
                   4               2
                  24               1
                  32               6
DBGvpp#