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
