Unable to ping Router_B and Router_C from Router_A

Hi,

I have layout my topology using CCNA Network Visualizer 5.0. I have Router_A, Router_B, and Router_C and all connected to each other through serials.

When I send a ping regardless which router I'm in, i get 0 percent success rate.

Maybe my configuration is the issue but cannot seems to locate the source of the problem.

Below are my configuration pf all routers:


Router_A

 

Router_A Con0 is now available

 

Press RETURN to get started!

 

Router_A>

Router_A>show running-config

              ^

% Invalid input detected at '^' marker.

Router_A>enable

Router_A#show running-config

 

Building configuration...

Current configuration : 625 bytes

!

version 12.2

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname Router_A

!

!

!

ip subnet-zero

!

!

!

!

!

interface FastEthernet0/0

  ip address 172.16.10.1 255.255.255.0

  no ip directed-broadcast

!

interface Serial0/0

  ip address 172.16.20.1 255.255.255.0

  no ip directed-broadcast

!

interface FastEthernet0/1

  no ip address

  no ip directed-broadcast

  shutdown

!

interface Serial0/1

  no ip address

  no ip directed-broadcast

  shutdown

!

!

ip classless

no ip http server

ip route 172.16.30.0 255.255.255.0 172.16.20.2

ip route 172.16.40.0 255.255.255.0 172.16.20.2

!

!

!

line con 0

line aux 0

line vty 0 4

  login

!

end

 

Router_A#

 

 

 

 

 

 

 

 

 

Router_B Con0 is now available

 

Press RETURN to get started!

Router_B>enable

Router_B#show running-config

 

Building configuration...

Current configuration : 625 bytes

!

version 12.2

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname Router_B

!

!

!

ip subnet-zero

!

!

!

!

!

interface FastEthernet0/0

  no ip address

  no ip directed-broadcast

  shutdown

!

interface Serial0/0

  ip address 172.16.20.2 255.255.255.0

  no ip directed-broadcast

!

interface FastEthernet0/1

  no ip address

  no ip directed-broadcast

  shutdown

!

interface Serial0/1

  ip address 172.16.30.1 255.255.255.0

  no ip directed-broadcast

!

!

ip classless

no ip http server

ip route 172.16.40.0 255.255.255.0 172.16.30.2

ip route 172.16.10.0 255.255.255.0 172.16.20.1

!

!

!

line con 0

line aux 0

line vty 0 4

  login

!

end

 

Router_B#

 

 

 

 

 

Router_C Con0 is now available

 

Press RETURN to get started!

 

Router_C>

Router_C>enable

Router_C#show running-config

 

Building configuration...

Current configuration : 625 bytes

!

version 12.2

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname Router_C

!

!

!

ip subnet-zero

!

!

!

!

!

interface FastEthernet0/0

  ip address 172.16.40.1 255.255.255.0

  no ip directed-broadcast

!

interface Serial0/0

  ip address 172.16.30.2 255.255.255.0

  no ip directed-broadcast

!

interface FastEthernet0/1

  no ip address

  no ip directed-broadcast

  shutdown

!

interface Serial0/1

  no ip address

  no ip directed-broadcast

  shutdown

!

!

ip classless

no ip http server

ip route 172.16.10.0 255.255.255.0 172.16.30.1

ip route 172.16.20.0 255.255.255.0 172.16.30.1

!

!

!

line con 0

line aux 0

line vty 0 4

  login

!

end

 

Router_C#