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["Arvind P" <>]

I've tried my level best to figure this out myself but I am getting stumped.

In the network topology from GNS3 

1) NAT1/NAT2 are the same thing. On my linux host system its configuration is:
  <name>default</name>
  <uuid>6eefc8b6-655b-4b6f-9618-ee1371365ab8</uuid>
  <forward mode='nat'>
    <nat>
      <port start='1024' end='65535'/>
    </nat>
  </forward>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:22:0e:f3'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.100' end='192.168.122.254'/>
      <host mac='52:54:00:4d:0f:07' name='winServer22' ip='192.168.122.10'/>
      <host mac='52:54:00:6e:5c:6a' name='win10' ip='192.168.122.11'/>
    </dhcp>
  </ip>
</network>

so its a NAT + dhcp server.

2) FR-4 is the freerouter node for which I am trying to troubleshoot giving nodes access to the internet via the NAT1. Below is its configuration:

hostname FR-4
buggy
!
!
vrf definition host
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface ethernet1
 vrf forwarding v1
 ipv4 address 172.16.1.1 255.255.255.0
 no shutdown
 no log-link-change
 exit
!
interface ethernet2
 vrf forwarding v1
 ipv4 address 192.168.1.1 255.255.255.0
 no shutdown
 no log-link-change
 exit              
!                  
interface ethernet20001
 vrf forwarding host
 ipv4 address 10.255.255.254 255.255.255.0
 no shutdown       
 no log-link-change
 exit              
!                  
interface ethernet3
 vrf forwarding v1 
 ipv4 address 192.168.122.247 255.255.255.0
 ipv4 dhcp-client enable
 no shutdown       
 no log-link-change
 exit              
!                  
interface ethernet4
 no shutdown       
 no log-link-change
 exit              
!                  
interface ethernet5
 no shutdown       
 no log-link-change
 exit              
!                  
interface ethernet6
 no shutdown       
 no log-link-change
 exit              
!                  
console0           
 no exec authorization
 no login authentication
 exit              
!                  
line tty1          
 no exec authorization
 no login authentication
 exit              
!                  
!                  
!                             
ipv4 route v1 0.0.0.0 255.255.255.255 192.168.122.1
ipv4 route v1 192.168.0.0 255.255.255.0 192.168.122.1            
!                  
!                  
server telnet host 
 security protocol telnet
 no exec authorization
 no login authentication
 vrf host          
 exit              
!                  

3) FR-3 is a freerouter node which is not relevant to my question. 
4) FR-1, FR-2 are also irrelevant to the question.

Below is the output of the command `sh ipv4 route v1'

typ  prefix              metric  iface      hop            time
S    0.0.0.0/32          1/0     ethernet3  192.168.122.1  00:23:24
C    172.16.1.0/24       0/0     ethernet1  null           00:23:34
LOC  172.16.1.1/32       0/1     ethernet1  null           00:23:34
S    192.168.0.0/24      1/0     ethernet3  192.168.122.1  00:23:24
C    192.168.1.0/24      0/0     ethernet2  null           00:23:34
LOC  192.168.1.1/32      0/1     ethernet2  null           00:23:34
C    192.168.122.0/24    0/0     ethernet3  null           00:23:24
REM  192.168.122.1/32    0/0     ethernet3  192.168.122.1  00:23:24
LOC  192.168.122.247/32  0/1     ethernet3  null           00:23:24


Observations:
- Alpine 3.16.2  directly connected to NAT gets a random DHCP address and can ping nodes on my LAN and reach outside to google etc. like the host.
- Alpine 3.16.1 connected through FR-4 can ping 172.16.1.2 (Interface of FR-3), ping 192.168.0.1 (and other alive nodes on the LAN) after adding the static route to 192.168.0.0/24 manually but not with the static route to 0.0.0.0/32 alone
- FR-4 can ping the LAN nodes through the NAT with the above config but cannot resolve google.com or any public ip address. Since Apline 3.16.2 can ping google.com successfully. There is some problem with my configuration.
- My LAN is on the 192.168.0.0/24 network with ip 192.168.0.1 and this is connected through WAN to my ISP who provides internt services.

Can you please guide me on what I am doing wrong.

Here is some output of my troubleshooting:

FR-4(cfg)#sh ipv4 route v1                                                    
typ  prefix              metric  iface      hop            time
C    172.16.1.0/24       0/0     ethernet1  null           00:35:28
LOC  172.16.1.1/32       0/1     ethernet1  null           00:35:28
S    192.168.0.0/24      1/0     ethernet3  192.168.122.1  00:35:18
C    192.168.1.0/24      0/0     ethernet2  null           00:35:28
LOC  192.168.1.1/32      0/1     ethernet2  null           00:35:28
C    192.168.122.0/24    0/0     ethernet3  null           00:35:18
REM  192.168.122.1/32    0/0     ethernet3  192.168.122.1  00:35:18
LOC  192.168.122.247/32  0/1     ethernet3  null           00:35:18

FR-4(cfg)#ping 192.168.0.1                                                    
invalid command, try  ?

FR-4(cfg)#ping 192.168.0.1 vrf v1                                             
invalid command, try  ?

FR-4(cfg)#do ping 192.168.0.1 vrf v1                                          
pinging 192.168.0.1, src="null," vrf=v1, cnt=5, len=64, df=false, tim=1000, gap=0, ttl=255, tos=0, sgt=0, flow=0, fill=0, alrt=-1, sweep=false, multi=false
!!!!!
result=100.0%, recv/sent/lost/err=5/5/0/0, took 79, min/avg/max/dev rtt=3/15.2/60/502, ttl 63/63.0/63/0.0, tos 0/0.0/0/0.0
FR-4(cfg)#  

Observation: Can ping gateway of main router but not access internet through router.

Please help me figure out what I am doing wrong.

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