The NETLMM WG standardized Proxy Mobile IPv6 (PMIPv6). PMIPv6
enables mobile devices to connect to a PMIPv6 domain and roam across
gateways without changing the IP address.
Current PMIPv6 specification does only support the movement of hosts
within the localized mobility domain. A mobile network (commonly
referred to as a NEMO, NEtwork that MOves) can also benefit from the
network-based localized mobility support provided by PMIPv6
[I-D.ietf-netext-pd-pmip], but with some limitations. This I-D
describes what can be done with current standardized protocols, and
describes the problem statement of fully supporting network mobility
in Proxy Mobile IPv6.