Methods and apparatus for home agent discovery in mobile IP using link state advertisements
AssigneeCisco Technology, Inc.
InventorsAlpesh S. Patel, Kent K. Leung, Gopal K. Dommety
Life of this patent
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Abstract
In one embodiment, an apparatus receives an advertisement from each of one or more Home Agents, the advertisement including a first set of information associated with a corresponding one of the Home Agents, each advertisement being in a first protocol. The apparatus obtains the first set of information associated with a corresponding one of the Home Agents from each advertisement. The apparatus composes a router advertisement including a second set of information associated with at least one of the Home Agents, the router advertisement being in a second protocol. The apparatus then sends the router advertisement.
Claims20
A method, comprising:
- receiving a set of one or more router advertisements, each of the router advertisements identifying one or more Home Agents, wherein at least one of the router advertisements indicates a distance to the corresponding at least one Home Agent, the distance being calculated using the Open Shortest Path First protocol, wherein at least one of the router advertisements indicates a load of the corresponding at least one Home Agent, wherein at least one router advertisement includes an Internet Protocol (IP) address of the corresponding at least one Home Agent;
- selecting one of the Home Agents identified in the set of one or more router advertisements based on the distance(s) and the load(s) indicated in the one or more router advertisements;
- composing a Mobile IP registration request identifying the selected Home Agent and identifying a Mobile Node;
- sending the Mobile IP registration request to the selected Home Agent;
- and
- receiving a registration reply from the selected Home Agent.
A system, comprising:
- a processor;
- and
- at least one memory device storing instructions that, when executed by the processor, cause the system to:
- receive a set of one or more router advertisements, each of the router advertisements identifying one or more Home Agents, wherein at least one of the router advertisements indicates a distance to the corresponding at least one Home Agent, wherein at least one of the router advertisements indicates a load of the corresponding at least one Home Agent, wherein at least one of the router advertisements indicates an Internet Protocol (IP) address of the corresponding at least one Home Agent;
- select one of the Home Agents identified in the set of one or more router advertisements based on the distance(s) and the load(s) indicated in the one or more router advertisements;
- compose a Mobile IP registration request identifying the selected Home Agent and identifying a Mobile Node;
- send the Mobile IP registration request to the selected Home Agent;
- and
- receive a registration reply from the selected Home Agent.
A non-transitory computer-readable storage medium storing one or more sequences of instructions for searching information, the one or more sequences of instructions executed by at least one processor to:
- receive a set of one or more router advertisements, each of the router advertisements identifying one or more Home Agents, wherein at least one of the router advertisements indicates a distance to the corresponding at least one Home Agent, the distance being calculated using the Open Shortest Path First protocol, wherein at least one of the router advertisements indicates a load of the corresponding at least one Home Agent;
- select one of the Home Agents identified in the set of one or more router advertisements based on the distance indicated in the at least one of the router advertisements;
- compose a Mobile IP registration request identifying the selected Home Agent and identifying a Mobile Node;
- send the Mobile IP registration request to the selected Home Agent;
- and
- receive a registration reply from the selected Home Agent.
Dependencies are inferred from the claim text.