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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Cable Modem [really more about PPPoE]
On Tue, 26 Jun 2001, William Allen Simpson wrote: > Chris White wrote: > > > > DHCP alone is not a viable option in this model. How do you get the end > > user traffic to the ISP and back in a pure IP environment? > > Very easily. The ISP has a NAS at the headend (or even in every > block). The cablemodem is a router that talks to the NAS, just as in > any other environment. The NAS performs DHCP, just as in any other > environment. The carrier provides commodity service, just as in any > other environment. ;-) The cable modem may be a router. A large number of DSL modems are not. Most (if not all) 802.11b wireless endpoints are not (these are very common in large scale deployments at the moment - long term viability is another issue) > > For access control, you need IPsec. But you need IPsec for security > and privacy anyway on a broadcast medium. This is really no different > than wireless. Agreed, but this is an additional client software on most end user systems unless you have an IPsec capable router and it adds a substantial cost at the termination point if you were to use IPsec tunnels to hand off the customers to another provider. > > (Hint, we discussed this stuff in the IP/cable working group many years > ago.... And I specified Mobile-IP to handle moving seamlessly between > cellular and broadband networks back in '92-93. Should stop rehashing > very old arguments.) I looked into Mobile-IP for a wireless deployment...requires a client and is not well supported at this time. Someday maybe... > > > In a wireless environment this becomes even more of a consideration as > > most of the current hardware is limited in ATM or L3 functionality... > > > I shudder to think of trying to deploy ATM over wireless. > > I don't know why you would deploy at L3, it seems rather far away -- > but if you perhaps mean IP, then I don't expect wireless that isn't > IP capable, going back to Tetherless Access Limited, and before that to > amateur radio. Nobody would use it otherwise! > I was talking about the functionality of the client stations. Most are no more than bridges at this time. > William Allen Simpson > Key fingerprint = 17 40 5E 67 15 6F 31 26 DD 0D B9 9B 6A 15 2C 32 >
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