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Method for intersubnet mobility for campus network

A mobility, campus network technology, used in network interconnection, wireless network protocols, data exchange networks, etc.

Inactive Publication Date: 2010-09-22
CISCO TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, standard Mobile IP is not currently widely used, mainly because it is not widely supported by existing legacy (i.e. Microsoft) TCP / IP stacks
Additionally, standard Mobile IP does not support non-IP protocols

Method used

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  • Method for intersubnet mobility for campus network
  • Method for intersubnet mobility for campus network
  • Method for intersubnet mobility for campus network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] Throughout this specification, the shown preferred embodiments and examples should be considered as illustrations of the invention, not as limitations of the invention.

[0060] first reference image 3, shows a typical layered network 300. Campus Context Manager (CCM) 302 issues security credentials for the mobile node's foreign agent and home agent. The Mobile Ethernet Proxy utilizes the CCM 302 to authenticate and establish separate secret keys. The CCM 302 is used by the foreign agent and the home agent to establish a secret key shared with each other. The "home VLAN binding" of the MN is stored in the CCM 302 of the "campus network", and is distributed as required when the MN roams. The CCM 302 acts as a "verifier" and Key Distribution Center (KDC) for the SCM and AP. Network 300 has two local control areas, each of which has a local context manager, LCM 304 for the first area and LCM 306 for the second area. Below the LCM 304 are two Subnet Context Managers (...

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PUM

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Abstract

The present invention provides a Mobile Ethernet Protocol that is used to logically extend a ''home VLAN'', through an Ethernet / IP ''campus network'', to mobile nodes on ''foreign subnets''. The network architecture used for Mobile Ethernet is hierarchical and includes a Subnet Context Manager per subnet and a central Campus Context Manager. The protocol is generally based on the standard Mobile IPv4 protocol, but includes significant extensions to standard Mobile IP including using an 802 address as the permanent MN identifier, rather than an IP address, encapsulating and sending Ethernet frames through IP tunnels, and configuring a single Mobile Ethernet HA to provide access to multiple home VLANs wherein Home VLAN bindings for MNs are dynamically established. A MN does not need to be configured with a permanent IP address.

Description

technical field [0001] The present invention relates generally to mobile communications, and more particularly to a method for extending a home virtual local area network (VLAN) to a mobile node on a foreign subnet over an Ethernet / IP campus network. Background technique [0002] A virtual local area network (VLAN) is a logical combination of two or more nodes that are not necessarily located on the same physical network segment, but share the same network number. Larger networks or campuses can contain multiple VLANs that provide equivalent services. For example, a campus network can contain multiple voice VLANs. When a node roams from its home subnet to a foreign subnet, messages to and from the node need to be routed appropriately. [0003] Standard Mobile IP only supports seamless subnetwork mobility for IP applications. However, standard Mobile IP is currently not widely used, mainly because it is not widely supported by existing legacy (ie Microsoft) TCP / IP protoco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/46H04L29/06H04L29/12
CPCH04L29/12839H04L61/6022H04L61/10H04W8/04H04L12/4625H04L29/12009H04L29/12018H04W80/04H04L12/4641H04L12/4645H04W88/182H04L2212/0025H04W8/26H04L2212/00H04L61/00H04L2101/622
Inventor 罗伯特·C·迈耶
Owner CISCO TECH INC