Method and apparatus for fault management of computer networks which utilizes a proxy or recruit network device to test the responsiveness of a network device. When a first network device loses contact with a second network device, the first network device uses a proxy network device to determine if...http://www.google.com.au/patents/US6199172?utm_source=gb-gplus-sharePatent US6199172 - Method and apparatus for testing the responsiveness of a network device
