[pox-dev] switches DPIDs values

2013-06-04 Thread Amauri Albuquerque 
Hello everybody,

My question is about the dpid number. I have a topology in mininet with 4
switches but there are repeated DPIDs values for switches. Shouldn't each
switch have an unique id? The connections are unique but not the IDs. In
event ConnectionUP I save the connections in a list, in this case, there
are four connections. I thought I could use the DPID to find the switch in
the list and then set a flow. But it may not work without unique ids. If
the ids are not unique, is there another way to identify a switch using POX?

Thanks in advance,

Amauri

Re: [pox-dev] switches DPIDs values

2013-06-04 Thread Murphy McCauley 
Yes, each switch should have a unique dpid.  I don't think I have ever seen 
otherwise with Mininet.  Are you using one of the standard Mininet topologies, 
or could it be a bug in the script that's initializing Mininet?

Also, you will sometimes see the same DPID in a ConnectionUp more than once 
even under correct configuration -- if the switch disconnects and then 
reconnects, for example.

-- Murphy

On Jun 4, 2013, at 2:26 AM, Amauri Albuquerque wrote:

 Hello everybody,
 
 My question is about the dpid number. I have a topology in mininet with 4 
 switches but there are repeated DPIDs values for switches. Shouldn't each 
 switch have an unique id? The connections are unique but not the IDs. In 
 event ConnectionUP I save the connections in a list, in this case, there are 
 four connections. I thought I could use the DPID to find the switch in the 
 list and then set a flow. But it may not work without unique ids. If the ids 
 are not unique, is there another way to identify a switch using POX?
 
 Thanks in advance,
 
 Amauri