VMware Duplicated(DUP!) ping responses from hosts in the same LAN

m4rtin · 11-20-2010, 09:50 PM

I have a following network setup:
http://img220.imageshack.us/img220/1269/setupha.png

Host machine is a "2.6.32-24-generic-pae #38-Ubuntu" and VMware® Workstation version is 7.1.2 build-301548.
In addition to those three IP addresses(192.168.1.254/24, 192.168.1.68/24 and 192.168.1.221/24) seen on a drawing, there are four identical virtual machines inside the 192.168.1.68/24 machine. Virtual machines are named Olive0-3. Olive0 has IP address 192.168.1.100, Olive1 has 192.168.1.101, Olive2 has 192.168.1.102 and Olive3 has 192.168.1.103. All virtual machines are set up like that:

http://img231.imageshack.us/img231/7090/nicb.png

The problem is, that if I ping between those virtual machines, I get duplicated echo-replies. For example:

Code:

root@Olive0> show interfaces em0.0 terse                                
Interface               Admin Link Proto    Local                 Remote 
em0.0                   up    up   inet     192.168.1.100/24            
                                                                        
root@Olive0> ping 192.168.1.101 source 192.168.1.100                    
PING 192.168.1.101 (192.168.1.101): 56 data bytes                       
64 bytes from 192.168.1.101: icmp_seq=0 ttl=64 time=0.660 ms            
64 bytes from 192.168.1.101: icmp_seq=0 ttl=64 time=0.737 ms (DUP!)     
64 bytes from 192.168.1.101: icmp_seq=0 ttl=64 time=0.752 ms (DUP!)     
64 bytes from 192.168.1.101: icmp_seq=0 ttl=64 time=0.764 ms (DUP!)      
^C                                                                       
--- 192.168.1.101 ping statistics ---                                    
1 packets transmitted, 1 packets received, +3 duplicates, 0% packet loss
round-trip min/avg/max/stddev = 0.660/0.728/0.764/0.041 ms               
                                                                         
root@Olive0>

http://img138.imageshack.us/img138/585/dupipaddress.png

There are no problems if I ping 192.168.1.254/24, 192.168.1.68/24 or 192.168.1.221/24 from one of the Olive virtual machines. I tried to analyze this problem using tcpdump utility:

http://img263.imageshack.us/img263/1209/pingissue.png

Any ideas, what might cause duplicated packages between virtual machines?

kbp · 11-21-2010, 04:30 AM

Did you clone the first Olive machine to make the rest? .. look for duplicate mac addresses

Actionscript3 · 07-02-2015, 08:36 PM

Still the same situation in VMWare Workstation 10 on Windows 7.

Googled for many pages; I just get it fixed by removing all "Incoming Connection" in Network Connections.

Just put here for a reference.