Proxy Mobile IPv6 (PMIPv6) is a network-based mobility management protocol that enables IP mobility for a host without participating in any mobile-related signaling. PMIPv6 acts as the proxy for the mobile node and the mobility entities in the network track the mobile node movements and initiate the mobility signaling and set up the required routing state.
The two functional entities of the PMIPv6 are Local Mobility Anchor(LMA) and Mobile Access Gateway (MAG).LMA maintains the reachability state of the mobile node and acts as a topological anchor point for the IP address of the mobile node. MAG does mobility management and it resides on the link where the mobile node is anchored.
Proxy Mobile IPv6 (or PMIPv6, or PMIP)
is a network-based mobility management protocol standardized by IETF and is specified in RFC 5213. It is a protocol for building a common and access technology independent of mobile core networks, accommodating various access technologies such as WiMAX, 3GPP, 3GPP2 and WLAN based access architectures. Proxy Mobile IPv6 is the only network-based mobility management protocol standardized by IETF.
Contrary to Mobile IP approach, this functionality is implemented by the network, which is responsible for tracking the movements of the host and initiating the required mobility signalling on its behalf. However in case the mobility involves different network interfaces, the host needs modifications similar to Mobile IP in order to maintain the same IP address across different interfaces.
Network-based mobility management enables IP mobility for a host without requiring its participation in any mobility-related signaling. The network is responsible for managing IP mobility on behalf of the host. The mobility entities in the network are responsible for tracking the movements of the host and initiating the required mobility signaling on its behalf. This specification describes a network-based mobility management protocol and is referred to as Proxy Mobile IPv6.
A proxy mobility agent in the network performs the signaling with the home agent and does the mobility management on behalf of the mobile node attached to the network. Because of the use and extension of Mobile IPv6 signaling and home agent functionality, this protocol is referred to as Proxy Mobile IPv6 (PMIPv6).
Proxy Mobile IPv6 Domain—A network where the mobility management of a mobile node is handled using the PMIPv6 protocol. The domain consists of network entities, such as MAG and LMA, between which Proxy Binding can be maintained on behalf of the mobile nodes.
Local Mobility Anchor (LMA)—LMA is the home agent for the mobile node in a PMIPv6 domain. It is the topological anchor point for the mobile node's home network prefix and is the entity that manages the mobile node's binding state.
Mobile Access Gateway (MAG)—MAG is a function on an access router that manages the mobility-related signaling for a mobile node that is attached to its access link. It is responsible for tracking the mobile node's movements to and from the access link.
Mobile Node (MN)—An IP host or router with mobility managed by the network. The MN can be an IPv4-only node, IPv6-only node, or a dual-stack node and is not required to participate in any IP mobility related signaling for achieving mobility for an IP address that is obtained in that PMIPv6 domain.
Network Access Identifier (NAI)—NAI is the user identity submitted by the client during network access authentication. In roaming, the purpose of the NAI is to identify the user and assist in the routing of the authentication request. The standard syntax is "user@realm", or as defined in rfc 4282.
Mobile Node Identifier—The identity of a mobile node in the PMIPv6 domain. This is the stable identifier and is typically an identifier, such as a NAI or Media Access Control (MAC) address.
Mobile Node Link-layer Identifier—An identifier that identifies the attached interface of a MN, for example, MAC address.
Proxy Binding Update (PBU)—A request message sent by MAG to LMA for establishing a binding between the MN's home network prefix and the MAG where the MN is attached.
Proxy Binding Acknowledgement (PBA)—A reply message sent by LMA in response to a PBU message that it received from a MAG.
This document provides a list of useful show commands to check the PMIPv6 client connectivity on WLC.
Useful Show Commands
The following show commands can be used to verify the PMIPv6 client connectivity
show pmipv6 domain
This command displays summary information of a PMIPv6 domain