Router Ping Error

[arthurjjjc]

Hi,

I have two routers connected to my LAN via switch, only one router can ping the other router.

Scenario:

Router A: is an internet router

Router B: 2nd router connected to the same network

Router A is the only one can ping router B but router B cannot ping the router A.

note they have the same subnet mask = 255.255.255.0

please can you help on this..

Arthur

[Georg Pauwen]

Hello Arthur,

can you post the configurations of both routers ?

Regards,

GP

[arthurjjjc]

Hi GP,

Below are the configuration of both routers:

Router A:

interface Ethernet0

ip address 212.12.17X.X 255.255.255.240

ip access-group viruses in

ip access-group viruses out

ip nat outside

rate-limit input 256000 16000 16000 conform-action continue exceed-action drop

rate-limit output 256000 16000 16000 conform-action continue exceed-action drop

half-duplex

!

interface FastEthernet0

ip address 192.168.0.5 255.255.255.0

ip nat inside

speed auto

ip nat inside source static 192.168.0.18 212.12.17x.a

ip nat inside source static 192.168.0.11 212.12.17x.b

ip nat inside source static 192.168.0.12 212.12.17x.c

ip nat inside source static 192.168.0.1 212.12.17x.d

ip nat inside source static 192.168.0.16 212.12.17x.e

ip nat inside source static 192.168.0.4 212.12.17x.f

ip nat inside source static 192.168.0.15 212.12.17x.g

ip nat inside source static 192.168.0.14 212.12.17x.h

Router B:

interface FastEthernet0

ip address 10.10.1.3 255.255.255.0 secondary

ip address 192.168.0.3 255.255.255.0

speed auto

!

interface Serial0

bandwidth 128000

ip address 172.17.17.1 255.255.255.252

no fair-queue

!

interface Serial1

no ip address

shutdown

!

router rip

version 2

network 10.0.0.0

network 172.17.0.0

network 192.168.0.0

no auto-summary

!

ip classless

no ip http server

!

Note: For confidential purposes we just not put the exact public ip address.

Hope you can help me on this...

Thanks,

Arthur

[weslin]

If you can change the 192.168.0.x/24 to

a different subnet such as 192.168.1.x/24.

Or, you can add "ip subnet-zero" in both routers' configuration.

The addresses in the NAT pool test are subnet zero addresses. The ping to the device fails because no translation occurs.

[arthurjjjc]

Hi Weslin,

Thank you for your response on my query, can i have a questions on your comments:

1. Your Comment: If you can change the 192.168.0.x/24 to

a different subnet such as 192.168.1.x/24.

Question: Where will i assign these values? Anyway on my router B this is pointing to our warehouse and also on that router it has an ip address 192.168.1.x with a subnet 255.255.255.0. Does this settings may conflict or not?

2. Your Comment: Or, you can add "ip subnet-zero" in both routers' configuration.

Question: How can i add it, and where will i put it on what interface? Could elaborate on this..

3. Your Comment: The addresses in the NAT pool test are subnet zero addresses. The ping to the device fails because no translation occurs.

Please explain all of this since you saw my configuration on both routers A & B.

Thanks,

Arthur