A silly question

[Difan Zhao]

I have a Cisco 871 router and its F4 interface connects to the Internet and vlan 10 interface connects to the internal network (10.0.0.0/24). I can't ping internal network which is sourced from interface F4. I don't think it's normal, right? Can anybody please let me know why? Thanks!

CCSPHOMERTR#ping 10.0.0.3

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.0.0.3, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

CCSPHOMERTR#ping 10.0.0.3 source f4

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.0.0.3, timeout is 2 seconds:

Packet sent with a source address of 70.64.2.22

.....

Success rate is 0 percent (0/5)

CCSPHOMERTR#

[nikhil.engineer]

Hi,

Can you ping to 70.64.22.2 with source as Vlan 10 ?

From internal are you able to ping 70.64.22.2?

Please post your show ip route o/p. Also post sh ip nat translations output.

I think there is no reverse path available.

HTH.

Cheers,

Nikhil E.