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At 00:53 02/02/08 +0900, Hiroyuki ASHIDA wrote: > >> DOCSIS CMTS of Cisco ( 85% current marcket share ) are equipped > >> with multiple (〜16 max) downstream ports per one chassis. > >> Therefore, one CMTS connects much more terminal modems. > > > Please clarify. One downstream port = 30MBPS = 1500 - 2000 users. > > Is this correct. Or one CMTS = multiple 30Mbps = 1500 - 2000 users. > >One downstream port is. Then, a /23 per downstream port of 30Mbps means that 25% to 30% of home passes will be allocated in bootstrap. I think the penetration rate of the whole CATV market (not CATV Internet) is about 25% to 30% in Japan. This means that IP addresses will be allocated to 100% of CATV users in the bootstrap stage. Although this may happen in some areas, considering that CATV Internet has about 1.3 million users which is only about 10% of the total CATV users, I think 100% allocation for bootstrap is too large. Considering these numbers, it seems that I have a misunderstanding somewhere. At the same time, there may be areas where the penetration rate is by far higher than average. May I ask someone to provide insights of the previous analysis? Yoshi - - This list (wg-bb) is handled by majordomo@lists.apnic.net
