8S2a/S2b Tunnel Establishment
8.1. PMIPv6 mechanism
The PMIPv6 (Proxy Mobile Internet Protocol version 6) mechanism allows a mobile host to keep its original IPv6 address, to maintain its current session or to be reachable when moving, mobility being provided by the network.
The mobile node (MN) is a host that changes network while retaining the home address (HoA) provided by its home network (Figure 8.1).
Figure 8.1. PMIPv6 architecture
The mobile access gateway (MAG) is integrated into gateway router of the mobile node and provides mobility management for the mobile node connected to its local network (Figure 8.1).
The local mobility anchor (LMA) is built into the router that acts as the home agent (HA) of the mobile node and represents the anchor point for the mobile node (Figure 8.1).
In the case of auto-configuration, the LMA function provides the mobile node with an IPv6 home network prefix (HNP), from which the mobile node builds its HoA.
If not, the MAG function hosts a DHCPv6 server that assigns the HoA to the mobile, built from the IPv6 HNP.
The LMA function registers in the BCE (Binding Cache Entry) table the identity MN-ID of the mobile and the proxy care-of address (CoA) of the MAG of the mobile node.
The tunnel built between the MAG and LMA functions is characterized by the proxy-CoA on the MAG side and the LMA address (LMAA) on the LMA side.
The local mobility ...
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