On Sat, 2015-05-09 at 17:06 -0400, Lamar Owen wrote:
The effective limit on subnet size would be of course broadcast overhead; 1,000 nodes on a /22 would likely be painfully slow due to broadcast overhead alone.
Would be interesting to see how IPv6 performed, since is one of the things it was supposed to be able to deliver - massively scalable links (equivalent to an IPv4 broadcast domain) via massively reduced protocol chatter (IPv6 multicast groups vs IPv4 broadcast), plus fully automated L3 address assignment. IPv4 ARP, for example, hits every on-subnet neighbour; the IPv6 equivalent uses multicast to hit only those neighbours that happen to share the same 24 low-end L3 address bits as the desired target - a statistically much smaller subset of on-link neighbours, and in "normal" subnets typically only one host. Only chatter that really should go to all hosts does so - such as router advertisements. Regards, K. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (kauer@biplane.com.au) http://www.biplane.com.au/kauer http://twitter.com/kauer389 GPG fingerprint: 3C41 82BE A9E7 99A1 B931 5AE7 7638 0147 2C3C 2AC4 Old fingerprint: EC67 61E2 C2F6 EB55 884B E129 072B 0AF0 72AA 9882