Max Lin <aa10101491@...> writes:

> 
> Hi all, 
> I use mininet to simulate the topology, and I have 1 switch s1, 3 hosts h1 
h2 h3, and use CPqD soft switch. 
> The cmd I am using is :
> 
> sudo mn --topo single,3 --mac --switch user --controller remote
> 
> But when I launch the my controller code, I saw there are unknown MAC 
addresses packet which I captured under
> Packet_in Event like this:
> 
> packet in 1 b6:5f:1a:40:c9:e4 33:33:00:00:00:02 1
> 
> my h1 hw address is 00:00:00:00:00:01
> h2 is 00:00:00:00:00:02
> h3 is 00:00:00:00:00:03
> 
> I check all the nodes I created using ifconfig, but I couldn’t find which 
device has MAC address
> b6:5f:1a:40:c9:e4, so I’m confused, and why there is another MAC address 
is 33:33:00:00:00:02.
> 
> Is that related because my implementation has group table or meter table 
something?
> I was trying to do simple multicasting on topology.
> 
> Can someone give me any hint on where do those packets come from ?
> 
> thank you
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> 
1. Check the mac address of switche s1, only switch can send packet_in 
message to controller

2. If your switch's mac address is something else, do a clean up of your 
mininet network by cmd:

sudo mn -c

and try again.

3.Also note that, start your controller first, start mn next.





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