Gustavo Lindberg schrieb:
2009/9/17 Daniel Seither post@tiwoc.de
Gustavo Lindberg wrote:
Then, At a meeting of 60 people there is the 99% probability of the
least
two men have a birthday the same day. So,, Similarly to the case of MAC-Adress is:
P(r)=1-65536!/(65536^r * (65536-r)!)
Robin uses 3 bytes of the MAC address to choose the IP address of the mesh interface, not only 2 bytes = 65536 possibilities. This leads to 2^24 = 16777216 different addresses.
All IP addresses are derived by device's MAC address, if MAC is aa:bb:cc:dd:ee:ff then ath0 IP (mesh iface) will be 5.dd:ee:ff while ath1 IP and ath2 IP will be 101.ee:ff:1 and 102.ee:ff:1 (obviously in decimal format).
I read this before, but now I realize that colliding IP addresses of the ath1/2 interfaces are a problem. This seriously limits the number of nodes in the network for reasonably low collision probabilities. With 200 nodes, you already have a probability greater than 25%. Enter IPv6...
Regards, Daniel