An extension to the IETF MIB module defined in
RFC-2006 for managing Mobile IP implementations.

Mobile IP introduces the following new functional 
entities:

Mobile Node(MN)
   A host or router that changes its point of
   attachment from one network or subnetwork to 
   another. A mobile node may change its location 
   without changing its IP address; it may continue to
   communicate with other Internet nodes at any
   location using its (constant) IP address, assuming 
   link-layer connectivity to a point of attachment is
   available.

Home Agent(HA)
   A router on a mobile node's home network which 
   tunnels datagrams for delivery to the mobile node 
   when it is away from home, and maintains current 
   location information for the mobile node.

Foreign Agent(FA)
   A router on a mobile node's visited network which 
   provides routing services to the mobile node while 
   registered. The foreign agent detunnels and delivers 
   datagrams to the mobile node that were tunneled by 
   the mobile node's home agent. For datagrams sent by
   a mobile node, the foreign agent may serve as a 
   default router for registered mobile nodes.

Mobile Router(MR)
   A mobile node that is a router. It provides for the
   mobility for one or more networks moving together.
   The nodes connected to the network server by the
   mobile router may themselves be fixed nodes, mobile
   nodes or routers.

Mobile Network
   Network that moves with the mobile router.

Following is the terminology associated with Mobile IP
protocol:

Agent Advertisement
   An advertisement message constructed by attaching a
   special Extension to a router advertisement message.

Care-of Address (CoA)
   The termination point of a tunnel toward a mobile 
   node, for datagrams forwarded to the mobile node 
   while it is away from home. The protocol can use
   two different types of care-of address: a 'foreign 
   agent care-of address' is an address of a foreign 
   agent with which the mobile node is registered, and
   a 'co-located care-of address' (CCoA) is an
   externally obtained local address which the mobile
   node has associated with one of its own network
   interfaces.

Correspondent Node
   A peer with which a mobile node is communicating.  
   A correspondent node may be either mobile or 
   stationary.

Foreign Network
   Any network other than the mobile node's Home 
   Network.

Home Address
   An IP address that is assigned for an extended 
   period of time to a mobile node. It remains 
   unchanged regardless of where the node is attached 
   to the Internet.

Home Network
   A network, possibly virtual, having a network prefix
   matching that of a mobile node's home address. Note
   that standard IP routing mechanisms will deliver 
   datagrams destined to a mobile node's Home Address 
   to the mobile node's Home Network.

Mobility Agent
   Either a home agent or a foreign agent.

Mobility Binding
   The association of a home address with a care-of 
   address, along with the remaining lifetime of that 
   association.

Mobility Security Association
   A collection of security contexts, between a pair
   of nodes, which may be applied to Mobile IP protocol
   messages exchanged between them. Each context 
   indicates an authentication algorithm and mode, a 
   secret (a shared key, or appropriate public/private
   key pair), and a style of replay protection in use.

Node     
   A host or a router.

Nonce    
   A randomly chosen value, different from previous 
   choices, inserted in a message to protect against 
   replays.

Security Parameter Index (SPI)
   An index identifying a security context between a 
   pair of nodes among the contexts available in the 
   Mobility Security Association. SPI values 0 through
   255 are reserved and MUST NOT be used in any
   Mobility Security Association.

Tunnel   
   The path followed by a datagram while it is 
   encapsulated. The model is that, while it is 
   encapsulated, a datagram is routed to a 
   knowledgeable decapsulating agent, which 
   decapsulates the datagram and then correctly 
   delivers it to its ultimate destination.

Visited Network
   A network other than a mobile node's Home Network, 
   to which the mobile node is currently connected.

Visitor List
   The list of mobile nodes visiting a foreign agent.

Keyed Hashing for Message Authentication (HMAC)
   A mechanism for message authentication using
   cryptographic hash functions. HMAC can be used with
   any iterative cryptographic hash function, e.g.,
   MD5, SHA-1, in combination with a secret shared
   key.

The following support services are defined for 
Mobile IP:

Agent Discovery
   Home agents and foreign agents may advertise their
   availability on each link for which they provide 
   service. A newly arrived mobile node can send a 
   solicitation on the link to learn if any prospective 
   agents are present.

Registration
   When the mobile node is away from home, it registers
   its care-of address with its home agent. Depending 
   on its method of attachment, the mobile node will 
   register either directly with its home agent, or 
   through a foreign agent which forwards the 
   registration to the home agent.

Following is the terminology associated with the home
agent redundancy feature:

Peer Home Agent
   Active home agent and standby home agent are peers 
   to each other.

Binding Update  
   A binding update contains the registration request
information. The home agent sends the update to its 
peer after accepting a registration.  

Binding Information
   Binding information contains the entries in the 
mobility binding table. The home agent sends a binding
information request to its peer to retrieve all 
mobility bindings for a specified home agent address.

3GPP2
        3rd Generation Partnership Project 2. This is 
the standardization group for CDMA2000, the set of 3G
standards based on earlier 2G CDMA technology.

WiMAX
        Worldwide Interoperability for Microwave Access,
 Inc. (group promoting IEEE 802.16 wireless broadband 
 standard)

MIP
        Mobile IP

This MIB is organized as described below:

   The IETF Mobile IP MIB module [RFC-2006] has six
   main groups. Three of them represent the Mobile IP 
   entities i.e. 'MipFA': foreign agent, 'MipHA': 
   home agent and 'MipMN': mobile node. Each of these 
   groups have been further subdivided into different 
   subgroups. Each of these subgroups is a collection 
   of objects related to a particular function, 
   performed by the entity represented by its main 
   group e.g. 'faRegistration' is a subgroup under 
   group 'MipFA' which has collection of objects for 
   registration function within a foreign agent. This 
   MIB also follows the same hierarchical structure to
   maintain the modularity with respect to Mobile IP.