Separation of Control and User Plane for Proxy Mobile IPv6
2014
This document specifies a method to split the control plane (CP) and
user plane (UP) for a network infrastructure based on Proxy Mobile
IPv6 (PMIPv6). Existing specifications allow a mobile access gateway
(MAG) to separate its control and user plane using the Alternate Care-
of Address mobility option for IPv6 or Alternate IPv4 Care-of Address
option for IPv4. However, the current specification does not provide
any mechanism allowing the local mobility anchor (LMA) to perform an
analogous functional split. To remedy that shortcoming, this document
specifies a mobility option enabling an LMA to provide an alternate
LMA address to be used for the bidirectional user-plane traffic
between the MAG and LMA. With this new option, an LMA will be able to
use an IP address for its user plane that is different than the IP
address used for the control plane.
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