I'm studing on this topic, and I learned that, when a node joins a network, it creates a local unicast address based on his MAC, then send a Neighbor Solicitation message to the multicast neighbor-solicited group of that address for detecting any duplicate.
Then it sends a Router Solicitation message, it receives (hopefully) a Router Advertisement message containing the network prefix, and then it create his global unicast address based on this informations.
But, as you can see in this screenshot (look at the highlighted packets), my node joins the network and sends the first NS, as described above, and then a second NS with targed address his global unicast address already built, without first sending RS and getting RA with network prefix.
Can someone explain how it gets the network prefix? Maybe it collects the RAs that the router was sending before it sends his NS? I hope that someone help my understanding this. Thanks
