Invention Grant
US07974222B2 Method and apparatus for providing link-local IPv4 addressing across multiple interfaces of a network node
有权
用于在网络节点的多个接口上提供链路本地IPv4寻址的方法和装置
- Patent Title: Method and apparatus for providing link-local IPv4 addressing across multiple interfaces of a network node
- Patent Title (中): 用于在网络节点的多个接口上提供链路本地IPv4寻址的方法和装置
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Application No.: US12257266Application Date: 2008-10-23
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Publication No.: US07974222B2Publication Date: 2011-07-05
- Inventor: Stuart D. Cheshire
- Applicant: Stuart D. Cheshire
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Park, Vaughan, Fleming & Dowler LLP
- Agent Anthony P. Jones
- Main IPC: H04L12/28
- IPC: H04L12/28 ; H04L12/50 ; G06F15/177

Abstract:
Embodiments of the present invention provide link-local IPv4 addressing across multiple interfaces of a network-node. During operation, the network-node broadcasts an address resolution protocol (ARP) request packet on multiple interfaces which asks for the hardware address of a network node whose link-local IPv4 address is Y. In response, the network-node receives an ARP-reply packet on an interface from a target network-node. If Y is present in the ARP cache and is associated with a different interface, the source network-node chooses a winner interface, and updates the ARP cache so that Y is associated with the winner interface. The network-node sends one or more contention-resolution packets on the loser interface to cause a loser network-node to choose another link-local IPv4 address for itself.
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