Open Stack

Dears,

I have defined this simple topology:
                    Internet ----- VM1 ----LAN---- VM2 -----Internet

I made 'ifconfig eth1 up' for each VM to activate the interface.
Then I tried to make the ping between the two VMs but it fails !

So I run the bellow command in one VM and re-run the ping in the other one
tcpdump -i eth1 icmp and icmp[icmptype]=icmp-echo
But I did not receive any packet despite that ICMP packets are allowed in
both directions (IN/OUT) !

Could you please tell me how to fix this problem.

Thanks in advance.
Regards
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