On Jun 14, 2011, at 1:15 PM, Ricky Beam wrote: > On Tue, 14 Jun 2011 12:02:18 -0400, Owen DeLong <o...@delong.com> wrote: >> That was kind of my point. You are unlikely to encounter such a large L2 >> domain outside of an exchange point. > > I've seen such large networks in private industry (and governements, not just > the US) several times. And IPv6 has been designed (poorly, it would now > appear) for huge "LAN"s -- LANs are supposed to be /64, after all. > > One of them "had" to have such stupid large L2 domains because they used RIP > (v1) EVERYWHERE. (all networks had to be /22's) They made a god aweful mess > trying to switch to OSPF, got fined by a three letter regulatory agency, and > are probably still running RIPv1 to this day.
The point of /64 is to support automatic configuration and incredibly sparse host addressing. It is not intended to create stupidly large broadcast domains. A /22 is probably about the upper limit of a sane broadcast domain, but, even with a /22 or 1022 nodes max, each sending a packet every 10 seconds you don't get to 100s of PPS, you get 102.2pps. Owen
