Hi Hesham, James, Jim, I think that the advantages of Opti-DAD particularly are that there's no dependence on support in Router infrastructure (beyond existing ND).
With FastRA, the amount of state kept and the required code changes are miniscule (was an afternoon's work for the prototype, including configuration subsystem). There's really no strict relationship with these mechanisms and MIPv6 Fast Handovers, which requires significant changes in added signalling mechanisms in Access Routers, as well as neighboring routers/L2 access point mappings. Of course, they will play nicely with each other though, since both FastRA and OptiDAD are designed to interwork with existing IP standards and Mobile-IP drafts. As far as isolating FastRA from the core, I think that's relatively simple, even in the case where all routers ship identical code: The FastRA draft says that it's configurable and defaults to off. Greg Daley Hesham Soliman (EAB) wrote:
James,
> Do you anticipate that the changes in FMIPv6 for access > routers will be in all
> IPv6 routers?
=> I don't know. But I know that any router can be
an "access router". People don't develop a special router
because it will be connected to an ethernet that has a an 802.11 base station at the other end. It's just a router, it can be connected anywhere.
Hesham
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