It's not at all clear to me that Mobile IP would be viable at the scale of a modern wireless service provider. It amounts to routing all traffic to/from the mobile device through a machine on the network of its "home" IP address. Without some fairly invasive routing shenanigans, this would be disastrously bad for users traveling far from their home network (e.g. a user gone on vacation).
Not that it matters, really. As far as I'm aware, there were never any substantial deployments of this protocol.
alt Hacker News
It's not at all clear to me that Mobile IP would be viable at the scale of a modern wireless service provider. It amounts to routing all traffic to/from the mobile device through a machine on the network of its "home" IP address. Without some fairly invasive routing shenanigans, this would be disastrously bad for users traveling far from their home network (e.g. a user gone on vacation).
Not that it matters, really. As far as I'm aware, there were never any substantial deployments of this protocol.